chore(test): migrate to vitest (#235)

59 files changed, 4550 insertions, 12468 deletions

diff --git a/test/address.spec.ts b/test/address.spec.ts
new file mode 100644
index 00000000..7b615926
--- /dev/null
+++ b/test/address.spec.ts
@@ -0,0 +1,782 @@
+import type { JestMockCompat } from 'vitest';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+describe('address', () => {
+  describe('city()', () => {
+    let spy_address_cityPrefix: JestMockCompat<[], string>;
+    let spy_name_firstName: JestMockCompat<[gender?: string | number], string>;
+    let spy_name_lastName: JestMockCompat<[gender?: string | number], string>;
+    let spy_address_citySuffix: JestMockCompat<[], string>;
+
+    beforeEach(() => {
+      spy_address_cityPrefix = vi.spyOn(faker.address, 'cityPrefix');
+      spy_name_firstName = vi.spyOn(faker.name, 'firstName');
+      spy_name_lastName = vi.spyOn(faker.name, 'lastName');
+      spy_address_citySuffix = vi.spyOn(faker.address, 'citySuffix');
+    });
+
+    afterEach(() => {
+      // faker.datatype.number.restore();
+      spy_address_cityPrefix.mockRestore();
+      spy_name_firstName.mockRestore();
+      spy_name_lastName.mockRestore();
+      spy_address_citySuffix.mockRestore();
+    });
+
+    it('occasionally returns prefix + first name + suffix', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockImplementation(() => 0);
+
+      const city = faker.address.city();
+      expect(city).toBeTruthy();
+
+      expect(spy_address_cityPrefix).toHaveBeenCalledOnce();
+      expect(spy_name_firstName).toHaveBeenCalledOnce();
+      expect(spy_address_citySuffix).toHaveBeenCalledOnce();
+
+      spy_datatype_number.mockRestore();
+    });
+
+    it('occasionally returns prefix + first name', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockImplementation(() => 1);
+
+      const city = faker.address.city();
+      expect(city).toBeTruthy();
+
+      expect(spy_address_cityPrefix).toHaveBeenCalledOnce();
+      expect(spy_name_firstName).toHaveBeenCalledOnce();
+
+      spy_datatype_number.mockRestore();
+    });
+
+    it('occasionally returns first name + suffix', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockImplementation(() => 2);
+
+      const city = faker.address.city();
+      expect(city).toBeTruthy();
+
+      expect(spy_address_citySuffix).toHaveBeenCalledOnce();
+
+      spy_datatype_number.mockRestore();
+    });
+
+    it('occasionally returns last name + suffix', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockImplementation(() => 3);
+
+      const city = faker.address.city();
+      expect(city).toBeTruthy();
+
+      expect(spy_address_cityPrefix).not.toHaveBeenCalled();
+      expect(spy_name_firstName).not.toHaveBeenCalled();
+      expect(spy_name_lastName).toHaveBeenCalled();
+      expect(spy_address_citySuffix).toHaveBeenCalled();
+
+      spy_datatype_number.mockRestore();
+    });
+  });
+
+  describe('streetName()', () => {
+    let spy_name_firstName: JestMockCompat<[gender?: string | number], string>;
+    let spy_name_lastName: JestMockCompat<[gender?: string | number], string>;
+    let spy_address_streetSuffix: JestMockCompat<[], string>;
+
+    beforeEach(() => {
+      spy_name_firstName = vi.spyOn(faker.name, 'firstName');
+      spy_name_lastName = vi.spyOn(faker.name, 'lastName');
+      spy_address_streetSuffix = vi.spyOn(faker.address, 'streetSuffix');
+    });
+
+    afterEach(() => {
+      spy_name_firstName.mockRestore();
+      spy_name_lastName.mockRestore();
+      spy_address_streetSuffix.mockRestore();
+    });
+
+    it('occasionally returns last name + suffix', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockImplementation(() => 0);
+
+      const street_name = faker.address.streetName();
+      expect(street_name).toBeTruthy();
+
+      expect(spy_name_firstName).not.toHaveBeenCalled();
+      expect(spy_name_lastName).toHaveBeenCalledOnce();
+      expect(spy_address_streetSuffix).toHaveBeenCalledOnce();
+
+      spy_datatype_number.mockRestore();
+    });
+
+    it('occasionally returns first name + suffix', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockImplementation(() => 1);
+
+      const street_name = faker.address.streetName();
+      expect(street_name).toBeTruthy();
+
+      expect(spy_name_firstName).toHaveBeenCalledOnce();
+      expect(spy_name_lastName).not.toHaveBeenCalled();
+      expect(spy_address_streetSuffix).toHaveBeenCalledOnce();
+
+      spy_datatype_number.mockRestore();
+    });
+
+    it('trims trailing whitespace from the name', () => {
+      spy_address_streetSuffix.mockRestore();
+
+      spy_address_streetSuffix.mockImplementation(() => '');
+
+      const street_name = faker.address.streetName();
+      expect(street_name).not.match(/ $/);
+
+      spy_address_streetSuffix.mockRestore();
+    });
+  });
+
+  describe('streetAddress()', () => {
+    const errorExpectDigits = (expected) => {
+      return 'The street number should be had ' + expected + ' digits';
+    };
+
+    let spy_address_streetName: JestMockCompat<[], string>;
+    let spy_address_secondaryAddress: JestMockCompat<[], string>;
+
+    beforeEach(() => {
+      spy_address_streetName = vi.spyOn(faker.address, 'streetName');
+      spy_address_secondaryAddress = vi.spyOn(
+        faker.address,
+        'secondaryAddress'
+      );
+    });
+
+    afterEach(() => {
+      spy_address_streetName.mockRestore();
+      spy_address_secondaryAddress.mockRestore();
+    });
+
+    it('occasionally returns a 5-digit street number', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockImplementation(() => 0);
+
+      const address = faker.address.streetAddress();
+      const expected = 5;
+      const parts = address.split(' ');
+
+      expect(parts[0].length, errorExpectDigits(expected)).toBe(expected);
+      expect(spy_address_streetName).toHaveBeenCalled();
+
+      spy_datatype_number.mockRestore();
+    });
+
+    it('occasionally returns a 4-digit street number', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockImplementation(() => 1);
+
+      const address = faker.address.streetAddress();
+      const parts = address.split(' ');
+      const expected = 4;
+
+      expect(parts[0].length, errorExpectDigits(expected)).toBe(expected);
+      expect(spy_address_streetName).toHaveBeenCalled();
+
+      spy_datatype_number.mockRestore();
+    });
+
+    it('occasionally returns a 3-digit street number', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockImplementation(() => 2);
+
+      const address = faker.address.streetAddress();
+      const parts = address.split(' ');
+      const expected = 3;
+
+      expect(parts[0].length, errorExpectDigits(expected)).toBe(expected);
+      expect(spy_address_streetName).toHaveBeenCalled();
+      expect(spy_address_secondaryAddress).not.toHaveBeenCalled();
+
+      spy_datatype_number.mockRestore();
+    });
+
+    describe('when useFulladdress is true', () => {
+      it('adds a secondary address to the result', () => {
+        faker.address.streetAddress(true);
+
+        expect(spy_address_secondaryAddress).toHaveBeenCalled();
+      });
+    });
+  });
+
+  describe('secondaryAddress()', () => {
+    it('randomly chooses an Apt or Suite number', () => {
+      const spy_random_arrayElement = vi.spyOn(faker.random, 'arrayElement');
+
+      const address = faker.address.secondaryAddress();
+
+      const expected_array = ['Apt. ###', 'Suite ###'];
+
+      expect(address).toBeTruthy();
+      expect(spy_random_arrayElement).toHaveBeenCalledWith(expected_array);
+    });
+  });
+
+  describe('county()', () => {
+    it('returns random county', () => {
+      const spy_address_county = vi.spyOn(faker.address, 'county');
+
+      const county = faker.address.county();
+
+      expect(county).toBeTruthy();
+      expect(spy_address_county).toHaveBeenCalled();
+    });
+  });
+
+  describe('country()', () => {
+    it('returns random country', () => {
+      const spy_address_country = vi.spyOn(faker.address, 'country');
+
+      const country = faker.address.country();
+
+      expect(country).toBeTruthy();
+      expect(spy_address_country).toHaveBeenCalled();
+    });
+  });
+
+  describe('countryCode()', () => {
+    it('returns random countryCode', () => {
+      const spy_address_countryCode = vi.spyOn(faker.address, 'countryCode');
+
+      const countryCode = faker.address.countryCode();
+
+      expect(countryCode).toBeTruthy();
+      expect(spy_address_countryCode).toHaveBeenCalled();
+    });
+
+    it('returns random alpha-3 countryCode', () => {
+      const spy_address_countryCode = vi.spyOn(faker.address, 'countryCode');
+
+      const countryCode = faker.address.countryCode('alpha-3');
+
+      expect(countryCode).toBeTruthy();
+      expect(spy_address_countryCode).toHaveBeenCalled();
+      expect(
+        countryCode.length,
+        'The countryCode should be had 3 characters'
+      ).toBe(3);
+    });
+  });
+
+  describe('state()', () => {
+    it('returns random state', () => {
+      const spy_address_state = vi.spyOn(faker.address, 'state');
+
+      const state = faker.address.state();
+
+      expect(state).toBeTruthy();
+      expect(spy_address_state).toHaveBeenCalled();
+    });
+  });
+
+  describe('zipCode()', () => {
+    it('returns random zipCode', () => {
+      const spy_address_zipCode = vi.spyOn(faker.address, 'zipCode');
+
+      const zipCode = faker.address.zipCode();
+
+      expect(zipCode).toBeTruthy();
+      expect(spy_address_zipCode).toHaveBeenCalled();
+    });
+
+    it('returns random zipCode - user specified format', () => {
+      let zipCode = faker.address.zipCode('?#? #?#');
+
+      expect(zipCode).match(/^[A-Za-z]\d[A-Za-z]\s\d[A-Za-z]\d$/);
+
+      // try another format
+      zipCode = faker.address.zipCode('###-###');
+
+      expect(zipCode).match(/^\d{3}-\d{3}$/);
+    });
+
+    it('returns zipCode with proper locale format', () => {
+      // we'll use the en_CA locale..
+      faker.locale = 'en_CA';
+      const zipCode = faker.address.zipCode();
+
+      expect(zipCode).match(/^[A-Za-z]\d[A-Za-z]\s?\d[A-Za-z]\d$/);
+    });
+  });
+
+  describe('zipCodeByState()', () => {
+    it('returns zipCode valid for specified State', () => {
+      faker.locale = 'en_US';
+      const states = ['IL', 'GA', 'WA'];
+
+      const zipCode1 = faker.address.zipCodeByState(states[0]);
+      expect(zipCode1).greaterThanOrEqual(60001);
+      expect(zipCode1).lessThanOrEqual(62999);
+
+      const zipCode2 = faker.address.zipCodeByState(states[1]);
+      expect(zipCode2).greaterThanOrEqual(30001);
+      expect(zipCode2).lessThanOrEqual(31999);
+
+      const zipCode3 = faker.address.zipCodeByState(states[2]);
+      expect(zipCode3).greaterThanOrEqual(98001);
+      expect(zipCode3).lessThanOrEqual(99403);
+    });
+
+    it('returns undefined if state is invalid', () => {
+      const state = 'XX';
+      const spy_address_zipCode = vi.spyOn(faker.address, 'zipCode');
+
+      faker.address.zipCodeByState(state);
+      expect(spy_address_zipCode).toHaveBeenCalled();
+
+      spy_address_zipCode.mockRestore();
+    });
+
+    it('returns undefined if state is valid but localeis invalid', () => {
+      faker.locale = 'zh_CN';
+      const state = 'IL';
+
+      const spy_address_zipCode = vi.spyOn(faker.address, 'zipCode');
+
+      faker.address.zipCodeByState(state);
+      expect(spy_address_zipCode).toHaveBeenCalled();
+
+      spy_address_zipCode.mockRestore();
+    });
+  });
+
+  describe('latitude()', () => {
+    it('returns random latitude', () => {
+      const spy_datatype_number = vi.spyOn(faker.datatype, 'number');
+
+      for (let i = 0; i < 100; i++) {
+        const latitude = faker.address.latitude();
+
+        expect(typeof latitude).toBe('string');
+
+        const latitude_float = parseFloat(latitude);
+
+        expect(latitude_float).greaterThanOrEqual(-90.0);
+        expect(latitude_float).lessThanOrEqual(90.0);
+        expect(spy_datatype_number).toHaveBeenCalled();
+
+        spy_datatype_number.mockRestore();
+      }
+    });
+
+    it('returns latitude with min and max and default precision', () => {
+      const spy_datatype_number = vi.spyOn(faker.datatype, 'number');
+
+      for (let i = 0; i < 100; i++) {
+        const latitude = faker.address.latitude(-5, 5);
+
+        expect(typeof latitude).toBe('string');
+        expect(
+          latitude.split('.')[1].length,
+          'The precision of latitude should be had of 4 digits'
+        ).toBe(4);
+
+        const latitude_float = parseFloat(latitude);
+
+        expect(latitude_float).greaterThanOrEqual(-5);
+        expect(latitude_float).lessThanOrEqual(5);
+        expect(spy_datatype_number).toHaveBeenCalled();
+
+        spy_datatype_number.mockRestore();
+      }
+    });
+
+    it('returns random latitude with custom precision', () => {
+      const spy_datatype_number = vi.spyOn(faker.datatype, 'number');
+
+      for (let i = 0; i < 100; i++) {
+        const latitude = faker.address.latitude(undefined, undefined, 7);
+
+        expect(typeof latitude).toBe('string');
+        expect(
+          latitude.split('.')[1].length,
+          'The precision of latitude should be had of 7 digits'
+        ).toBe(7);
+
+        const latitude_float = parseFloat(latitude);
+
+        expect(latitude_float).greaterThanOrEqual(-180);
+        expect(latitude_float).lessThanOrEqual(180);
+        expect(spy_datatype_number).toHaveBeenCalled();
+
+        spy_datatype_number.mockRestore();
+      }
+    });
+  });
+
+  describe('longitude()', () => {
+    it('returns random longitude', () => {
+      const spy_datatype_number = vi.spyOn(faker.datatype, 'number');
+
+      for (let i = 0; i < 100; i++) {
+        const longitude = faker.address.longitude();
+
+        expect(typeof longitude).toBe('string');
+
+        const longitude_float = parseFloat(longitude);
+
+        expect(longitude_float).greaterThanOrEqual(-180);
+        expect(longitude_float).lessThanOrEqual(180);
+        expect(spy_datatype_number).toHaveBeenCalled();
+
+        spy_datatype_number.mockRestore();
+      }
+    });
+
+    it('returns random longitude with min and max and default precision', () => {
+      const spy_datatype_number = vi.spyOn(faker.datatype, 'number');
+
+      for (let i = 0; i < 100; i++) {
+        const longitude = faker.address.longitude(100, -30);
+
+        expect(typeof longitude).toBe('string');
+        expect(
+          longitude.split('.')[1].length,
+          'The precision of longitude should be had of 4 digits'
+        ).toBe(4);
+
+        const longitude_float = parseFloat(longitude);
+
+        expect(longitude_float).greaterThanOrEqual(-30);
+        expect(longitude_float).lessThanOrEqual(100);
+        expect(spy_datatype_number).toHaveBeenCalled();
+
+        spy_datatype_number.mockRestore();
+      }
+    });
+
+    it('returns random longitude with custom precision', () => {
+      const spy_datatype_number = vi.spyOn(faker.datatype, 'number');
+
+      for (let i = 0; i < 100; i++) {
+        const longitude = faker.address.longitude(undefined, undefined, 7);
+
+        expect(typeof longitude).toBe('string');
+        expect(
+          longitude.split('.')[1].length,
+          'The precision of longitude should be had of 7 digits'
+        ).toBe(7);
+
+        const longitude_float = parseFloat(longitude);
+
+        expect(longitude_float).greaterThanOrEqual(-180);
+        expect(longitude_float).lessThanOrEqual(180);
+        expect(spy_datatype_number).toHaveBeenCalled();
+
+        spy_datatype_number.mockRestore();
+      }
+    });
+  });
+
+  describe('direction()', () => {
+    it('returns random direction', () => {
+      // TODO @Shinigami92 2022-01-20: This test does nothing and should be rewritten
+      const spy_address_direction = vi
+        .spyOn(faker.address, 'direction')
+        .mockReturnValue('North');
+
+      const direction = faker.address.direction();
+      const expected = 'North';
+
+      expect(
+        direction,
+        'The random direction should be equals ' + expected
+      ).toBe(expected);
+
+      spy_address_direction.mockRestore();
+    });
+
+    it('returns abbreviation when useAbbr is false', () => {
+      // TODO @Shinigami92 2022-01-20: This test does nothing and should be rewritten
+      const spy_address_direction = vi
+        .spyOn(faker.address, 'direction')
+        .mockReturnValue('N');
+
+      const direction = faker.address.direction(false);
+      const expected = 'N';
+
+      expect(
+        direction,
+        'The abbreviation of direction when useAbbr is false should be equals ' +
+          expected +
+          '. Current is ' +
+          direction
+      ).toBe(expected);
+
+      spy_address_direction.mockRestore();
+    });
+
+    it('returns abbreviation when useAbbr is true', () => {
+      const direction = faker.address.direction(true);
+      const expectedType = 'string';
+      const lengthDirection = direction.length;
+      const prefixErrorMessage =
+        'The abbreviation of direction when useAbbr is true should';
+
+      expect(
+        typeof direction,
+        prefixErrorMessage + ' be typeof string. Current is' + typeof direction
+      ).toBe(expectedType);
+      expect(
+        lengthDirection <= 2,
+        prefixErrorMessage +
+          ' have a length less or equals 2. Current is ' +
+          lengthDirection
+      ).toBe(true);
+    });
+
+    it('returns abbreviation when useAbbr is true', () => {
+      const spy_address_direction = vi
+        .spyOn(faker.address, 'direction')
+        .mockReturnValue('N');
+
+      const direction = faker.address.direction(true);
+      const expected = 'N';
+
+      expect(
+        direction,
+        'The abbreviation of direction when useAbbr is true should be equals ' +
+          expected +
+          '. Current is ' +
+          direction
+      ).toBe(expected);
+
+      spy_address_direction.mockRestore();
+    });
+  });
+
+  describe('ordinalDirection()', () => {
+    it('returns random ordinal direction', () => {
+      const spy_address_ordinalDirection = vi
+        .spyOn(faker.address, 'ordinalDirection')
+        .mockReturnValue('West');
+
+      const ordinalDirection = faker.address.ordinalDirection();
+      const expected = 'West';
+
+      expect(
+        ordinalDirection,
+        'The ransom ordinal direction should be equals ' +
+          expected +
+          '. Current is ' +
+          ordinalDirection
+      ).toBe(expected);
+
+      spy_address_ordinalDirection.mockRestore();
+    });
+
+    it('returns abbreviation when useAbbr is true', () => {
+      const spy_address_ordinalDirection = vi
+        .spyOn(faker.address, 'ordinalDirection')
+        .mockReturnValue('W');
+
+      const ordinalDirection = faker.address.ordinalDirection(true);
+      const expected = 'W';
+
+      expect(
+        ordinalDirection,
+        'The ordinal direction when useAbbr is true should be equals ' +
+          expected +
+          '. Current is ' +
+          ordinalDirection
+      ).toBe(expected);
+
+      spy_address_ordinalDirection.mockRestore();
+    });
+
+    it('returns abbreviation when useAbbr is true', () => {
+      const ordinalDirection = faker.address.ordinalDirection(true);
+      const expectedType = 'string';
+      const ordinalDirectionLength = ordinalDirection.length;
+      const prefixErrorMessage =
+        'The ordinal direction when useAbbr is true should';
+
+      expect(
+        typeof ordinalDirection,
+        prefixErrorMessage +
+          ' be had typeof equals ' +
+          expectedType +
+          '.Current is ' +
+          typeof ordinalDirection
+      ).toBe(expectedType);
+      expect(
+        ordinalDirectionLength <= 2,
+        prefixErrorMessage +
+          ' have a length less or equals 2. Current is ' +
+          ordinalDirectionLength
+      ).toBe(true);
+    });
+  });
+
+  describe('cardinalDirection()', () => {
+    it('returns random cardinal direction', () => {
+      const spy_address_cardinalDirection = vi
+        .spyOn(faker.address, 'cardinalDirection')
+        .mockReturnValue('Northwest');
+
+      const cardinalDirection = faker.address.cardinalDirection();
+      const expected = 'Northwest';
+
+      expect(
+        cardinalDirection,
+        'The random cardinal direction should be equals ' +
+          expected +
+          '. Current is ' +
+          cardinalDirection
+      ).toBe(expected);
+
+      spy_address_cardinalDirection.mockRestore();
+    });
+
+    it('returns abbreviation when useAbbr is true', () => {
+      const spy_address_cardinalDirection = vi
+        .spyOn(faker.address, 'cardinalDirection')
+        .mockReturnValue('NW');
+
+      const cardinalDirection = faker.address.cardinalDirection(true);
+      const expected = 'NW';
+
+      expect(
+        cardinalDirection,
+        'The cardinal direction when useAbbr is true should be equals ' +
+          expected +
+          '. Current is ' +
+          cardinalDirection
+      ).toBe(expected);
+
+      spy_address_cardinalDirection.mockRestore();
+    });
+
+    it('returns abbreviation when useAbbr is true', () => {
+      const cardinalDirection = faker.address.cardinalDirection(true);
+      const expectedType = 'string';
+      const cardinalDirectionLength = cardinalDirection.length;
+      const prefixErrorMessage =
+        'The cardinal direction when useAbbr is true should';
+
+      expect(
+        typeof cardinalDirection,
+        prefixErrorMessage +
+          ' be had typeof equals ' +
+          expectedType +
+          '.Current is ' +
+          typeof cardinalDirection
+      ).toBe(expectedType);
+      expect(
+        cardinalDirectionLength <= 2,
+        prefixErrorMessage +
+          ' have a length less or equals 2. Current is ' +
+          cardinalDirectionLength
+      ).toBe(true);
+    });
+  });
+
+  describe('nearbyGPSCoordinate()', () => {
+    it('returns random gps coordinate within a distance of another one', () => {
+      function haversine(lat1, lon1, lat2, lon2, isMetric) {
+        function degreesToRadians(degrees) {
+          return degrees * (Math.PI / 180.0);
+        }
+        function kilometersToMiles(miles) {
+          return miles * 0.621371;
+        }
+        const R = 6378.137;
+        const dLat = degreesToRadians(lat2 - lat1);
+        const dLon = degreesToRadians(lon2 - lon1);
+        const a =
+          Math.sin(dLat / 2) * Math.sin(dLat / 2) +
+          Math.cos(degreesToRadians(lat1)) *
+            Math.cos(degreesToRadians(lat2)) *
+            Math.sin(dLon / 2) *
+            Math.sin(dLon / 2);
+        const distance = R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+
+        return isMetric ? distance : kilometersToMiles(distance);
+      }
+
+      let latFloat1: number;
+      let lonFloat1: number;
+      let isMetric: boolean;
+
+      for (let i = 0; i < 10000; i++) {
+        latFloat1 = parseFloat(faker.address.latitude());
+        lonFloat1 = parseFloat(faker.address.longitude());
+        const radius = Math.random() * 99 + 1; // range of [1, 100)
+        isMetric = Math.round(Math.random()) == 1;
+
+        const coordinate = faker.address.nearbyGPSCoordinate(
+          [latFloat1, lonFloat1],
+          radius,
+          isMetric
+        );
+
+        expect(coordinate.length).toBe(2);
+        expect(typeof coordinate[0]).toBe('string');
+        expect(typeof coordinate[1]).toBe('string');
+
+        const latFloat2 = parseFloat(coordinate[0]);
+        expect(latFloat2).greaterThanOrEqual(-90.0);
+        expect(latFloat2).lessThanOrEqual(90.0);
+
+        const lonFloat2 = parseFloat(coordinate[1]);
+        expect(lonFloat2).greaterThanOrEqual(-180.0);
+        expect(lonFloat2).lessThanOrEqual(180.0);
+
+        // Due to floating point math, and constants that are not extremely precise,
+        // returned points will not be strictly within the given radius of the input
+        // coordinate. Using a error of 1.0 to compensate.
+        const error = 1.0;
+        const actualDistance = haversine(
+          latFloat1,
+          lonFloat1,
+          latFloat2,
+          lonFloat2,
+          isMetric
+        );
+        expect(actualDistance).lessThanOrEqual(radius + error);
+      }
+
+      // test once with undefined radius
+      const coordinate = faker.address.nearbyGPSCoordinate(
+        [latFloat1, lonFloat1],
+        undefined,
+        isMetric
+      );
+      expect(coordinate.length).toBe(2);
+      expect(typeof coordinate[0]).toBe('string');
+      expect(typeof coordinate[1]).toBe('string');
+    });
+  });
+
+  describe('timeZone()', () => {
+    it('returns random timeZone', () => {
+      const spy_address_timeZone = vi.spyOn(faker.address, 'timeZone');
+
+      const timeZone = faker.address.timeZone();
+
+      expect(timeZone).toBeTruthy();
+      expect(spy_address_timeZone).toHaveBeenCalled();
+
+      spy_address_timeZone.mockRestore();
+    });
+  });
+});
diff --git a/test/address.unit.js b/test/address.unit.js
deleted file mode 100644
index 95334a61..00000000
--- a/test/address.unit.js
+++ /dev/null
@@ -1,678 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('address.js', function () {
-  describe('city()', function () {
-    beforeEach(function () {
-      sinon.spy(faker.address, 'cityPrefix');
-      sinon.spy(faker.name, 'firstName');
-      sinon.spy(faker.name, 'lastName');
-      sinon.spy(faker.address, 'citySuffix');
-    });
-
-    afterEach(function () {
-      faker.datatype.number.restore();
-      faker.address.cityPrefix.restore();
-      faker.name.firstName.restore();
-      faker.name.lastName.restore();
-      faker.address.citySuffix.restore();
-    });
-
-    it('occasionally returns prefix + first name + suffix', function () {
-      sinon.stub(faker.datatype, 'number').returns(0);
-
-      var city = faker.address.city();
-      assert.ok(city);
-
-      assert.ok(faker.address.cityPrefix.calledOnce);
-      assert.ok(faker.name.firstName.calledOnce);
-      assert.ok(faker.address.citySuffix.calledOnce);
-    });
-
-    it('occasionally returns prefix + first name', function () {
-      sinon.stub(faker.datatype, 'number').returns(1);
-
-      var city = faker.address.city();
-      assert.ok(city);
-
-      assert.ok(faker.address.cityPrefix.calledOnce);
-      assert.ok(faker.name.firstName.calledOnce);
-    });
-
-    it('occasionally returns first name + suffix', function () {
-      sinon.stub(faker.datatype, 'number').returns(2);
-
-      var city = faker.address.city();
-      assert.ok(city);
-
-      assert.ok(faker.address.citySuffix.calledOnce);
-    });
-
-    it('occasionally returns last name + suffix', function () {
-      sinon.stub(faker.datatype, 'number').returns(3);
-
-      var city = faker.address.city();
-      assert.ok(city);
-
-      assert.ok(!faker.address.cityPrefix.called);
-      assert.ok(!faker.name.firstName.called);
-      assert.ok(faker.name.lastName.calledOnce);
-      assert.ok(faker.address.citySuffix.calledOnce);
-    });
-  });
-
-  describe('streetName()', function () {
-    beforeEach(function () {
-      sinon.spy(faker.name, 'firstName');
-      sinon.spy(faker.name, 'lastName');
-      sinon.spy(faker.address, 'streetSuffix');
-    });
-
-    afterEach(function () {
-      faker.name.firstName.restore();
-      faker.name.lastName.restore();
-      faker.address.streetSuffix.restore();
-    });
-
-    it('occasionally returns last name + suffix', function () {
-      sinon.stub(faker.datatype, 'number').returns(0);
-
-      var street_name = faker.address.streetName();
-      assert.ok(street_name);
-      assert.ok(!faker.name.firstName.called);
-      assert.ok(faker.name.lastName.calledOnce);
-      assert.ok(faker.address.streetSuffix.calledOnce);
-
-      faker.datatype.number.restore();
-    });
-
-    it('occasionally returns first name + suffix', function () {
-      sinon.stub(faker.datatype, 'number').returns(1);
-
-      var street_name = faker.address.streetName();
-      assert.ok(street_name);
-
-      assert.ok(faker.name.firstName.calledOnce);
-      assert.ok(!faker.name.lastName.called);
-      assert.ok(faker.address.streetSuffix.calledOnce);
-
-      faker.datatype.number.restore();
-    });
-
-    it('trims trailing whitespace from the name', function () {
-      faker.address.streetSuffix.restore();
-
-      sinon.stub(faker.address, 'streetSuffix').returns('');
-      var street_name = faker.address.streetName();
-      assert.ok(!street_name.match(/ $/));
-    });
-  });
-
-  describe('streetAddress()', function () {
-    var errorExpectDigits = function (expected) {
-      return 'The street number should be had ' + expected + ' digits';
-    };
-
-    beforeEach(function () {
-      sinon.spy(faker.address, 'streetName');
-      sinon.spy(faker.address, 'secondaryAddress');
-    });
-
-    afterEach(function () {
-      faker.address.streetName.restore();
-      faker.address.secondaryAddress.restore();
-    });
-
-    it('occasionally returns a 5-digit street number', function () {
-      sinon.stub(faker.datatype, 'number').returns(0);
-      var address = faker.address.streetAddress();
-      var expected = 5;
-      var parts = address.split(' ');
-
-      assert.strictEqual(
-        parts[0].length,
-        expected,
-        errorExpectDigits(expected)
-      );
-      assert.ok(faker.address.streetName.called);
-
-      faker.datatype.number.restore();
-    });
-
-    it('occasionally returns a 4-digit street number', function () {
-      sinon.stub(faker.datatype, 'number').returns(1);
-      var address = faker.address.streetAddress();
-      var parts = address.split(' ');
-      var expected = 4;
-
-      assert.strictEqual(
-        parts[0].length,
-        expected,
-        errorExpectDigits(expected)
-      );
-      assert.ok(faker.address.streetName.called);
-
-      faker.datatype.number.restore();
-    });
-
-    it('occasionally returns a 3-digit street number', function () {
-      sinon.stub(faker.datatype, 'number').returns(2);
-      var address = faker.address.streetAddress();
-      var parts = address.split(' ');
-      var expected = 3;
-
-      assert.strictEqual(
-        parts[0].length,
-        expected,
-        errorExpectDigits(expected)
-      );
-      assert.ok(faker.address.streetName.called);
-      assert.ok(!faker.address.secondaryAddress.called);
-
-      faker.datatype.number.restore();
-    });
-
-    context('when useFulladdress is true', function () {
-      it('adds a secondary address to the result', function () {
-        faker.address.streetAddress(true);
-
-        assert.ok(faker.address.secondaryAddress.called);
-      });
-    });
-  });
-
-  describe('secondaryAddress()', function () {
-    it('randomly chooses an Apt or Suite number', function () {
-      sinon.spy(faker.random, 'arrayElement');
-
-      var address = faker.address.secondaryAddress();
-
-      var expected_array = ['Apt. ###', 'Suite ###'];
-
-      assert.ok(address);
-      assert.ok(faker.random.arrayElement.calledWith(expected_array));
-      faker.random.arrayElement.restore();
-    });
-  });
-
-  describe('county()', function () {
-    it('returns random county', function () {
-      sinon.spy(faker.address, 'county');
-      var county = faker.address.county();
-      assert.ok(county);
-      assert.ok(faker.address.county.called);
-      faker.address.county.restore();
-    });
-  });
-
-  describe('country()', function () {
-    it('returns random country', function () {
-      sinon.spy(faker.address, 'country');
-      var country = faker.address.country();
-      assert.ok(country);
-      assert.ok(faker.address.country.called);
-      faker.address.country.restore();
-    });
-  });
-
-  describe('countryCode()', function () {
-    it('returns random countryCode', function () {
-      sinon.spy(faker.address, 'countryCode');
-      var countryCode = faker.address.countryCode();
-      assert.ok(countryCode);
-      assert.ok(faker.address.countryCode.called);
-      faker.address.countryCode.restore();
-    });
-
-    it('returns random alpha-3 countryCode', function () {
-      sinon.spy(faker.address, 'countryCode');
-      var countryCode = faker.address.countryCode('alpha-3');
-      assert.ok(countryCode);
-      assert.ok(faker.address.countryCode.called);
-      assert.strictEqual(
-        countryCode.length,
-        3,
-        'The countryCode should be had 3 characters'
-      );
-      faker.address.countryCode.restore();
-    });
-  });
-
-  describe('state()', function () {
-    it('returns random state', function () {
-      sinon.spy(faker.address, 'state');
-      var state = faker.address.state();
-      assert.ok(state);
-      assert.ok(faker.address.state.called);
-      faker.address.state.restore();
-    });
-  });
-
-  describe('zipCode()', function () {
-    it('returns random zipCode', function () {
-      sinon.spy(faker.address, 'zipCode');
-      var zipCode = faker.address.zipCode();
-      assert.ok(zipCode);
-      assert.ok(faker.address.zipCode.called);
-      faker.address.zipCode.restore();
-    });
-
-    it('returns random zipCode - user specified format', function () {
-      var zipCode = faker.address.zipCode('?#? #?#');
-      assert.ok(zipCode.match(/^[A-Za-z]\d[A-Za-z]\s\d[A-Za-z]\d$/));
-      // try another format
-      zipCode = faker.address.zipCode('###-###');
-      assert.ok(zipCode.match(/^\d{3}-\d{3}$/));
-    });
-
-    it('returns zipCode with proper locale format', function () {
-      // we'll use the en_CA locale..
-      faker.locale = 'en_CA';
-      var zipCode = faker.address.zipCode();
-      assert.ok(zipCode.match(/^[A-Za-z]\d[A-Za-z]\s?\d[A-Za-z]\d$/));
-    });
-  });
-
-  describe('zipCodeByState()', function () {
-    it('returns zipCode valid for specified State', function () {
-      faker.locale = 'en_US';
-      var states = ['IL', 'GA', 'WA'];
-
-      var zipCode1 = faker.address.zipCodeByState(states[0]);
-      assert.ok(zipCode1 >= 60001);
-      assert.ok(zipCode1 <= 62999);
-      var zipCode2 = faker.address.zipCodeByState(states[1]);
-      assert.ok(zipCode2 >= 30001);
-      assert.ok(zipCode2 <= 31999);
-      var zipCode3 = faker.address.zipCodeByState(states[2]);
-      assert.ok(zipCode3 >= 98001);
-      assert.ok(zipCode3 <= 99403);
-    });
-
-    it('returns undefined if state is invalid', function () {
-      var state = 'XX';
-      sinon.spy(faker.address, 'zipCode');
-      faker.address.zipCodeByState(state);
-      assert.ok(faker.address.zipCode.called);
-      faker.address.zipCode.restore();
-    });
-
-    it('returns undefined if state is valid but localeis invalid', function () {
-      faker.locale = 'zh_CN';
-      var state = 'IL';
-      sinon.spy(faker.address, 'zipCode');
-      faker.address.zipCodeByState(state);
-      assert.ok(faker.address.zipCode.called);
-      faker.address.zipCode.restore();
-    });
-  });
-
-  describe('latitude()', function () {
-    it('returns random latitude', function () {
-      for (var i = 0; i < 100; i++) {
-        sinon.spy(faker.datatype, 'number');
-        var latitude = faker.address.latitude();
-        assert.ok(typeof latitude === 'string');
-        var latitude_float = parseFloat(latitude);
-        assert.ok(latitude_float >= -90.0);
-        assert.ok(latitude_float <= 90.0);
-        assert.ok(faker.datatype.number.called);
-        faker.datatype.number.restore();
-      }
-    });
-
-    it('returns latitude with min and max and default precision', function () {
-      for (var i = 0; i < 100; i++) {
-        sinon.spy(faker.datatype, 'number');
-        var latitude = faker.address.latitude(-5, 5);
-        assert.ok(typeof latitude === 'string');
-        assert.strictEqual(
-          latitude.split('.')[1].length,
-          4,
-          'The precision of latitude should be had of 4 digits'
-        );
-        var latitude_float = parseFloat(latitude);
-        assert.ok(latitude_float >= -5);
-        assert.ok(latitude_float <= 5);
-        assert.ok(faker.datatype.number.called);
-        faker.datatype.number.restore();
-      }
-    });
-
-    it('returns random latitude with custom precision', function () {
-      for (var i = 0; i < 100; i++) {
-        sinon.spy(faker.datatype, 'number');
-        var latitude = faker.address.latitude(undefined, undefined, 7);
-        assert.ok(typeof latitude === 'string');
-        assert.strictEqual(
-          latitude.split('.')[1].length,
-          7,
-          'The precision of latitude should be had of 7 digits'
-        );
-        var latitude_float = parseFloat(latitude);
-        assert.ok(latitude_float >= -180);
-        assert.ok(latitude_float <= 180);
-        assert.ok(faker.datatype.number.called);
-        faker.datatype.number.restore();
-      }
-    });
-  });
-
-  describe('longitude()', function () {
-    it('returns random longitude', function () {
-      for (var i = 0; i < 100; i++) {
-        sinon.spy(faker.datatype, 'number');
-        var longitude = faker.address.longitude();
-        assert.ok(typeof longitude === 'string');
-        var longitude_float = parseFloat(longitude);
-        assert.ok(longitude_float >= -180.0);
-        assert.ok(longitude_float <= 180.0);
-        assert.ok(faker.datatype.number.called);
-        faker.datatype.number.restore();
-      }
-    });
-
-    it('returns random longitude with min and max and default precision', function () {
-      for (var i = 0; i < 100; i++) {
-        sinon.spy(faker.datatype, 'number');
-        var longitude = faker.address.longitude(100, -30);
-        assert.ok(typeof longitude === 'string');
-        assert.strictEqual(
-          longitude.split('.')[1].length,
-          4,
-          'The precision of longitude should be had of 4 digits'
-        );
-        var longitude_float = parseFloat(longitude);
-        assert.ok(longitude_float >= -30);
-        assert.ok(longitude_float <= 100);
-        assert.ok(faker.datatype.number.called);
-        faker.datatype.number.restore();
-      }
-    });
-
-    it('returns random longitude with custom precision', function () {
-      for (var i = 0; i < 100; i++) {
-        sinon.spy(faker.datatype, 'number');
-        var longitude = faker.address.longitude(undefined, undefined, 7);
-        assert.ok(typeof longitude === 'string');
-        assert.strictEqual(
-          longitude.split('.')[1].length,
-          7,
-          'The precision of longitude should be had of 7 digits'
-        );
-        var longitude_float = parseFloat(longitude);
-        assert.ok(longitude_float >= -180);
-        assert.ok(longitude_float <= 180);
-        assert.ok(faker.datatype.number.called);
-        faker.datatype.number.restore();
-      }
-    });
-  });
-
-  describe('direction()', function () {
-    it('returns random direction', function () {
-      sinon.stub(faker.address, 'direction').returns('North');
-      var direction = faker.address.direction();
-      var expected = 'North';
-
-      assert.strictEqual(
-        direction,
-        expected,
-        'The random direction should be equals ' + expected
-      );
-      faker.address.direction.restore();
-    });
-
-    it('returns abbreviation when useAbbr is false', function () {
-      sinon.stub(faker.address, 'direction').returns('N');
-      var direction = faker.address.direction(false);
-      var expected = 'N';
-      assert.strictEqual(
-        direction,
-        expected,
-        'The abbreviation of direction when useAbbr is false should be equals ' +
-          expected +
-          '. Current is ' +
-          direction
-      );
-      faker.address.direction.restore();
-    });
-
-    it('returns abbreviation when useAbbr is true', function () {
-      var direction = faker.address.direction(true);
-      var expectedType = 'string';
-      var lengthDirection = direction.length;
-      var prefixErrorMessage =
-        'The abbreviation of direction when useAbbr is true should';
-      assert.strictEqual(
-        typeof direction,
-        expectedType,
-        prefixErrorMessage + ' be typeof string. Current is' + typeof direction
-      );
-      assert.strictEqual(
-        lengthDirection <= 2,
-        true,
-        prefixErrorMessage +
-          ' have a length less or equals 2. Current is ' +
-          lengthDirection
-      );
-    });
-
-    it('returns abbreviation when useAbbr is true', function () {
-      sinon.stub(faker.address, 'direction').returns('N');
-      var direction = faker.address.direction(true);
-      var expected = 'N';
-      assert.strictEqual(
-        direction,
-        expected,
-        'The abbreviation of direction when useAbbr is true should be equals ' +
-          expected +
-          '. Current is ' +
-          direction
-      );
-      faker.address.direction.restore();
-    });
-  });
-
-  describe('ordinalDirection()', function () {
-    it('returns random ordinal direction', function () {
-      sinon.stub(faker.address, 'ordinalDirection').returns('West');
-      var ordinalDirection = faker.address.ordinalDirection();
-      var expected = 'West';
-
-      assert.strictEqual(
-        ordinalDirection,
-        expected,
-        'The ransom ordinal direction should be equals ' +
-          expected +
-          '. Current is ' +
-          ordinalDirection
-      );
-      faker.address.ordinalDirection.restore();
-    });
-
-    it('returns abbreviation when useAbbr is true', function () {
-      sinon.stub(faker.address, 'ordinalDirection').returns('W');
-      var ordinalDirection = faker.address.ordinalDirection(true);
-      var expected = 'W';
-
-      assert.strictEqual(
-        ordinalDirection,
-        expected,
-        'The ordinal direction when useAbbr is true should be equals ' +
-          expected +
-          '. Current is ' +
-          ordinalDirection
-      );
-      faker.address.ordinalDirection.restore();
-    });
-
-    it('returns abbreviation when useAbbr is true', function () {
-      var ordinalDirection = faker.address.ordinalDirection(true);
-      var expectedType = 'string';
-      var ordinalDirectionLength = ordinalDirection.length;
-      var prefixErrorMessage =
-        'The ordinal direction when useAbbr is true should';
-
-      assert.strictEqual(
-        typeof ordinalDirection,
-        expectedType,
-        prefixErrorMessage +
-          ' be had typeof equals ' +
-          expectedType +
-          '.Current is ' +
-          typeof ordinalDirection
-      );
-      assert.strictEqual(
-        ordinalDirectionLength <= 2,
-        true,
-        prefixErrorMessage +
-          ' have a length less or equals 2. Current is ' +
-          ordinalDirectionLength
-      );
-    });
-  });
-
-  describe('cardinalDirection()', function () {
-    it('returns random cardinal direction', function () {
-      sinon.stub(faker.address, 'cardinalDirection').returns('Northwest');
-      var cardinalDirection = faker.address.cardinalDirection();
-      var expected = 'Northwest';
-
-      assert.strictEqual(
-        cardinalDirection,
-        expected,
-        'The random cardinal direction should be equals ' +
-          expected +
-          '. Current is ' +
-          cardinalDirection
-      );
-      faker.address.cardinalDirection.restore();
-    });
-
-    it('returns abbreviation when useAbbr is true', function () {
-      sinon.stub(faker.address, 'cardinalDirection').returns('NW');
-      var cardinalDirection = faker.address.cardinalDirection(true);
-      var expected = 'NW';
-
-      assert.strictEqual(
-        cardinalDirection,
-        expected,
-        'The cardinal direction when useAbbr is true should be equals ' +
-          expected +
-          '. Current is ' +
-          cardinalDirection
-      );
-      faker.address.cardinalDirection.restore();
-    });
-
-    it('returns abbreviation when useAbbr is true', function () {
-      var cardinalDirection = faker.address.cardinalDirection(true);
-      var expectedType = 'string';
-      var cardinalDirectionLength = cardinalDirection.length;
-      var prefixErrorMessage =
-        'The cardinal direction when useAbbr is true should';
-
-      assert.strictEqual(
-        typeof cardinalDirection,
-        expectedType,
-        prefixErrorMessage +
-          ' be had typeof equals ' +
-          expectedType +
-          '.Current is ' +
-          typeof ordinalDirection
-      );
-      assert.strictEqual(
-        cardinalDirectionLength <= 2,
-        true,
-        prefixErrorMessage +
-          ' have a length less or equals 2. Current is ' +
-          cardinalDirectionLength
-      );
-    });
-  });
-
-  describe('nearbyGPSCoordinate()', function () {
-    it('returns random gps coordinate within a distance of another one', function () {
-      function haversine(lat1, lon1, lat2, lon2, isMetric) {
-        function degreesToRadians(degrees) {
-          return degrees * (Math.PI / 180.0);
-        }
-        function kilometersToMiles(miles) {
-          return miles * 0.621371;
-        }
-        var R = 6378.137;
-        var dLat = degreesToRadians(lat2 - lat1);
-        var dLon = degreesToRadians(lon2 - lon1);
-        var a =
-          Math.sin(dLat / 2) * Math.sin(dLat / 2) +
-          Math.cos(degreesToRadians(lat1)) *
-            Math.cos(degreesToRadians(lat2)) *
-            Math.sin(dLon / 2) *
-            Math.sin(dLon / 2);
-        var distance = R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
-
-        return isMetric ? distance : kilometersToMiles(distance);
-      }
-      for (var i = 0; i < 10000; i++) {
-        var latFloat1 = parseFloat(faker.address.latitude());
-        var lonFloat1 = parseFloat(faker.address.longitude());
-        var radius = Math.random() * 99 + 1; // range of [1, 100)
-        var isMetric = Math.round(Math.random()) == 1;
-
-        var coordinate = faker.address.nearbyGPSCoordinate(
-          [latFloat1, lonFloat1],
-          radius,
-          isMetric
-        );
-        assert.ok(coordinate.length === 2);
-        assert.ok(typeof coordinate[0] === 'string');
-        assert.ok(typeof coordinate[1] === 'string');
-
-        var latFloat2 = parseFloat(coordinate[0]);
-        assert.ok(latFloat2 >= -90.0);
-        assert.ok(latFloat2 <= 90.0);
-
-        var lonFloat2 = parseFloat(coordinate[1]);
-        assert.ok(lonFloat2 >= -180.0);
-        assert.ok(lonFloat2 <= 180.0);
-
-        // Due to floating point math, and constants that are not extremely precise,
-        // returned points will not be strictly within the given radius of the input
-        // coordinate. Using a error of 1.0 to compensate.
-        var error = 1.0;
-        var actualDistance = haversine(
-          latFloat1,
-          lonFloat1,
-          latFloat2,
-          lonFloat2,
-          isMetric
-        );
-        assert.ok(actualDistance <= radius + error);
-      }
-
-      // test once with undefined radius
-      var coordinate = faker.address.nearbyGPSCoordinate(
-        [latFloat1, lonFloat1],
-        undefined,
-        isMetric
-      );
-      assert.ok(coordinate.length === 2);
-      assert.ok(typeof coordinate[0] === 'string');
-      assert.ok(typeof coordinate[1] === 'string');
-    });
-  });
-
-  describe('timeZone()', function () {
-    it('returns random timeZone', function () {
-      sinon.spy(faker.address, 'timeZone');
-      var timeZone = faker.address.timeZone();
-      assert.ok(timeZone);
-      assert.ok(faker.address.timeZone.called);
-      faker.address.timeZone.restore();
-    });
-  });
-});
diff --git a/test/all.functional.js b/test/all.functional.js
deleted file mode 100644
index 36ddad42..00000000
--- a/test/all.functional.js
+++ /dev/null
@@ -1,55 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-var functionalHelpers = require('./support/function-helpers.js');
-
-var modules = functionalHelpers.modulesList();
-
-describe('functional tests', function () {
-  for (var locale in faker.locales) {
-    faker.locale = locale;
-    Object.keys(modules).forEach(function (module) {
-      describe(module, function () {
-        modules[module].forEach(function (meth) {
-          it(meth + '()', function () {
-            var result = faker[module][meth]();
-            if (meth === 'boolean') {
-              assert.ok(result === true || result === false);
-            } else {
-              assert.ok(result);
-            }
-          });
-        });
-      });
-    });
-  }
-});
-
-describe('faker.fake functional tests', function () {
-  for (var locale in faker.locales) {
-    faker.locale = locale;
-    faker.seed(1);
-    Object.keys(modules).forEach(function (module) {
-      describe(module, function () {
-        modules[module].forEach(function (meth) {
-          it(meth + '()', function () {
-            var result = faker.fake('{{' + module + '.' + meth + '}}');
-            // just make sure any result is returned
-            // an undefined result usually means an error
-            assert.ok(typeof result !== 'undefined');
-            /*
-                    if (meth === 'boolean') {
-                        assert.ok(result === true || result === false);
-                    } else {
-                        assert.ok(result);
-                    }
-                    */
-          });
-        });
-      });
-    });
-  }
-});
diff --git a/test/all_functional.spec.ts b/test/all_functional.spec.ts
new file mode 100644
index 00000000..779d8335
--- /dev/null
+++ b/test/all_functional.spec.ts
@@ -0,0 +1,107 @@
+import { describe, expect, it } from 'vitest';
+import { faker } from '../lib';
+
+const IGNORED_MODULES = [
+  'locales',
+  'locale',
+  'localeFallback',
+  'definitions',
+  'fake',
+  'helpers',
+  'mersenne',
+];
+
+const IGNORED_METHODS = {
+  system: ['directoryPath', 'filePath'], // these are TODOs
+};
+
+function isTestableModule(mod: string) {
+  return IGNORED_MODULES.indexOf(mod) === -1;
+}
+
+function isMethodOf(mod: string) {
+  return (meth: string) => typeof faker[mod][meth] === 'function';
+}
+
+function isTestableMethod(mod: string) {
+  return (meth: string) =>
+    !(mod in IGNORED_METHODS && IGNORED_METHODS[mod].indexOf(meth) >= 0);
+}
+
+function both(
+  pred1: (meth: string) => boolean,
+  pred2: (meth: string) => boolean
+) {
+  return (value) => pred1(value) && pred2(value);
+}
+
+// Basic smoke tests to make sure each method is at least implemented and returns a value.
+
+function modulesList() {
+  const modules = Object.keys(faker)
+    .filter(isTestableModule)
+    .reduce((result, mod) => {
+      result[mod] = Object.keys(faker[mod]).filter(
+        both(isMethodOf(mod), isTestableMethod(mod))
+      );
+      return result;
+    }, {});
+
+  return modules;
+}
+
+const modules = modulesList();
+
+describe('functional tests', () => {
+  for (const locale in faker.locales) {
+    faker.locale = locale;
+    Object.keys(modules).forEach((module) => {
+      describe(module, () => {
+        // if there is nothing to test, create a dummy test so the test runner doesn't complain
+        if (Object.keys(modules[module]).length === 0) {
+          it.todo(`${module} was empty`);
+        }
+
+        modules[module].forEach((meth) => {
+          it(meth + '()', () => {
+            const result = faker[module][meth]();
+            if (meth === 'boolean') {
+              expect(typeof result).toBe('boolean');
+            } else {
+              expect(result).toBeTruthy();
+            }
+          });
+        });
+      });
+    });
+  }
+});
+
+describe('faker.fake functional tests', () => {
+  for (const locale in faker.locales) {
+    faker.locale = locale;
+    faker.seed(1);
+    Object.keys(modules).forEach((module) => {
+      describe(module, () => {
+        // if there is nothing to test, create a dummy test so the test runner doesn't complain
+        if (Object.keys(modules[module]).length === 0) {
+          it.todo(`${module} was empty`);
+        }
+
+        modules[module].forEach((meth) => {
+          it(meth + '()', () => {
+            const result = faker.fake('{{' + module + '.' + meth + '}}');
+            // just make sure any result is returned
+            // an undefined result usually means an error
+            expect(result).toBeDefined();
+            // if (meth === 'boolean') {
+            //   expect(typeof result).toBe('boolean');
+            // } else {
+            //   expect(result).toBeTruthy();
+            // }
+          });
+        });
+      });
+    });
+  }
+});
diff --git a/test/animal.spec.ts b/test/animal.spec.ts
new file mode 100644
index 00000000..a2c63eab
--- /dev/null
+++ b/test/animal.spec.ts
@@ -0,0 +1,11 @@
+import { describe, expect, it } from 'vitest';
+import { faker } from '../lib';
+
+describe('animal', () => {
+  describe('dog()', () => {
+    it('returns random value from dog array', () => {
+      const dog = faker.animal.dog();
+      expect(faker.definitions.animal.dog).toContain(dog);
+    });
+  });
+});
diff --git a/test/animal.unit.js b/test/animal.unit.js
deleted file mode 100644
index 17d7aa8a..00000000
--- a/test/animal.unit.js
+++ /dev/null
@@ -1,14 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('animal.js', function () {
-  describe('dog()', function () {
-    it('returns random value from dog array', function () {
-      var dog = faker.animal.dog();
-      assert.ok(faker.definitions.animal.dog.indexOf(dog) !== -1);
-    });
-  });
-});
diff --git a/test/browser.unit.html b/test/browser.unit.html
deleted file mode 100644
index c9606103..00000000
--- a/test/browser.unit.html
+++ /dev/null
@@ -1,33 +0,0 @@
-<html>
-  <head>
-    <meta charset="utf-8" />
-    <title>Mocha Tests</title>
-    <link rel="stylesheet" href="../node_modules/mocha/mocha.css" />
-  </head>
-  <body>
-    <div id="mocha"></div>
-    <script src="../node_modules/mocha/mocha.js"></script>
-    <script src="../faker.js"></script>
-    <script src="./support/chai.js"></script>
-    <script src="./support/sinon-1.5.2.js"></script>
-    <script>
-      assert = chai.assert;
-    </script>
-    <script>
-      mocha.setup('bdd');
-    </script>
-    <script src="all.functional.js"></script>
-    <script src="address.unit.js"></script>
-    <script src="company.unit.js"></script>
-    <script src="helpers.unit.js"></script>
-    <script src="internet.unit.js"></script>
-    <script src="database.unit.js"></script>
-    <script src="datatype.unit.js"></script>
-    <script src="lorem.unit.js"></script>
-    <script src="name.unit.js"></script>
-    <script src="phone_number.unit.js"></script>
-    <script>
-      mocha.run();
-    </script>
-  </body>
-</html>
diff --git a/test/commerce.spec.ts b/test/commerce.spec.ts
new file mode 100644
index 00000000..4f3cde72
--- /dev/null
+++ b/test/commerce.spec.ts
@@ -0,0 +1,158 @@
+import { describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+describe('commerce', () => {
+  describe('color()', () => {
+    it('returns random value from commerce.color array', () => {
+      const color = faker.commerce.color();
+      expect(faker.definitions.commerce.color).toContain(color);
+    });
+  });
+
+  describe('department(max, fixedValue)', () => {
+    it('should use the default amounts when not passing arguments', () => {
+      const department = faker.commerce.department();
+      expect(department.split(' ')).toHaveLength(1);
+    });
+
+    /*
+
+    it("should return only one value if we specify a maximum of one", function() {
+        sinon.spy(faker.random, 'arrayElement');
+
+        const department = faker.commerce.department(1);
+
+        assert.strictEqual(department.split(" ").length, 1);
+        assert.ok(faker.random.arrayElement.calledOnce);
+
+        faker.random.arrayElement.restore();
+    });
+
+    it("should return the maximum value if we specify the fixed value", function() {
+        sinon.spy(faker.random, 'arrayElement');
+
+        const department = faker.commerce.department(5, true);
+
+        console.log(department);
+
+        // account for the separator
+        assert.strictEqual(department.split(" ").length, 6);
+        // Sometimes it will generate duplicates that aren't used in the final string,
+        // so we check if arrayElement has been called exactly or more than 5 times
+        assert.ok(faker.random.arrayElement.callCount >= 5);
+
+        faker.random.arrayElement.restore();
+    });
+    */
+  });
+
+  describe('productName()', () => {
+    it('returns name comprising of an adjective, material and product', () => {
+      const spy_random_arrayElement = vi.spyOn(faker.random, 'arrayElement');
+      const spy_commerce_productAdjective = vi.spyOn(
+        faker.commerce,
+        'productAdjective'
+      );
+      const spy_commerce_productMaterial = vi.spyOn(
+        faker.commerce,
+        'productMaterial'
+      );
+      const spy_commerce_product = vi.spyOn(faker.commerce, 'product');
+
+      const name = faker.commerce.productName();
+
+      expect(name.split(' ').length).greaterThanOrEqual(3);
+
+      expect(spy_random_arrayElement).toHaveBeenCalledTimes(3);
+      expect(spy_commerce_productAdjective).toHaveBeenCalledOnce();
+      expect(spy_commerce_productMaterial).toHaveBeenCalledOnce();
+      expect(spy_commerce_product).toHaveBeenCalledOnce();
+
+      spy_random_arrayElement.mockRestore();
+      spy_commerce_productAdjective.mockRestore();
+      spy_commerce_productMaterial.mockRestore();
+      spy_commerce_product.mockRestore();
+    });
+  });
+
+  describe('price(min, max, dec, symbol)', () => {
+    it('should use the default amounts when not passing arguments', () => {
+      const price = faker.commerce.price();
+
+      expect(price).toBeTruthy();
+      // TODO @Shinigami92 2022-01-20: I converted the price string to number to satisfy TS
+      expect(+price > 0, 'the amount should be greater than 0').toBe(true);
+      expect(+price < 1001, 'the amount should be less than 1000').toBe(true);
+    });
+
+    it('should use the default decimal location when not passing arguments', () => {
+      const price = faker.commerce.price();
+
+      const decimal = '.';
+      const expected = price.length - 3;
+      const actual = price.indexOf(decimal);
+
+      expect(
+        actual,
+        'The expected location of the decimal is ' +
+          expected +
+          ' but it was ' +
+          actual +
+          ' amount ' +
+          price
+      ).toBe(expected);
+    });
+
+    it('should not include a currency symbol by default', () => {
+      const amount = faker.commerce.price();
+
+      const regexp = new RegExp(/[0-9.]/);
+
+      const expected = true;
+      const actual = regexp.test(amount);
+
+      expect(
+        actual,
+        'The expected match should not include a currency symbol'
+      ).toBe(expected);
+    });
+
+    it('it should handle negative amounts, but return 0', () => {
+      const amount = faker.commerce.price(-200, -1);
+
+      expect(amount).toBeTruthy();
+      // TODO @Shinigami92 2022-01-20: I converted the price string to number to satisfy TS
+      expect(+amount === 0.0, 'the amount should equal 0').toBe(true);
+    });
+
+    it('it should handle argument dec', () => {
+      const price = faker.commerce.price(100, 100, 1);
+
+      expect(price).toBeTruthy();
+      expect(price, 'the price should be equal 100.0').toStrictEqual('100.0');
+    });
+
+    it('it should handle argument dec = 0', () => {
+      const price = faker.commerce.price(100, 100, 0);
+
+      expect(price).toBeTruthy();
+      expect(price, 'the price should be equal 100').toStrictEqual('100');
+    });
+  });
+
+  describe('productDescription()', () => {
+    it('returns a random product description', () => {
+      const spy_commerce_productDescription = vi.spyOn(
+        faker.commerce,
+        'productDescription'
+      );
+
+      const description = faker.commerce.productDescription();
+
+      expect(typeof description).toBe('string');
+      expect(spy_commerce_productDescription).toHaveBeenCalledOnce();
+
+      spy_commerce_productDescription.mockRestore();
+    });
+  });
+});
diff --git a/test/commerce.unit.js b/test/commerce.unit.js
deleted file mode 100644
index 5df8d400..00000000
--- a/test/commerce.unit.js
+++ /dev/null
@@ -1,157 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('commerce.js', function () {
-  describe('color()', function () {
-    it('returns random value from commerce.color array', function () {
-      var color = faker.commerce.color();
-      assert.ok(faker.definitions.commerce.color.indexOf(color) !== -1);
-    });
-  });
-
-  describe('department(max, fixedValue)', function () {
-    it('should use the default amounts when not passing arguments', function () {
-      var department = faker.commerce.department();
-      assert.ok(department.split(' ').length === 1);
-    });
-
-    /*
-
-    it("should return only one value if we specify a maximum of one", function() {
-        sinon.spy(faker.random, 'arrayElement');
-
-        var department = faker.commerce.department(1);
-
-        assert.strictEqual(department.split(" ").length, 1);
-        assert.ok(faker.random.arrayElement.calledOnce);
-
-        faker.random.arrayElement.restore();
-    });
-
-    it("should return the maximum value if we specify the fixed value", function() {
-        sinon.spy(faker.random, 'arrayElement');
-
-        var department = faker.commerce.department(5, true);
-
-        console.log(department);
-
-        // account for the separator
-        assert.strictEqual(department.split(" ").length, 6);
-        // Sometimes it will generate duplicates that aren't used in the final string,
-        // so we check if arrayElement has been called exactly or more than 5 times
-        assert.ok(faker.random.arrayElement.callCount >= 5);
-
-        faker.random.arrayElement.restore();
-    });
-    */
-  });
-
-  describe('productName()', function () {
-    it('returns name comprising of an adjective, material and product', function () {
-      sinon.spy(faker.random, 'arrayElement');
-      sinon.spy(faker.commerce, 'productAdjective');
-      sinon.spy(faker.commerce, 'productMaterial');
-      sinon.spy(faker.commerce, 'product');
-      var name = faker.commerce.productName();
-
-      assert.ok(name.split(' ').length >= 3);
-      assert.ok(faker.random.arrayElement.calledThrice);
-      assert.ok(faker.commerce.productAdjective.calledOnce);
-      assert.ok(faker.commerce.productMaterial.calledOnce);
-      assert.ok(faker.commerce.product.calledOnce);
-
-      faker.random.arrayElement.restore();
-      faker.commerce.productAdjective.restore();
-      faker.commerce.productMaterial.restore();
-      faker.commerce.product.restore();
-    });
-  });
-
-  describe('price(min, max, dec, symbol)', function () {
-    it('should use the default amounts when not passing arguments', function () {
-      var price = faker.commerce.price();
-
-      assert.ok(price);
-      assert.strictEqual(
-        price > 0,
-        true,
-        'the amount should be greater than 0'
-      );
-      assert.strictEqual(
-        price < 1001,
-        true,
-        'the amount should be less than 1000'
-      );
-    });
-
-    it('should use the default decimal location when not passing arguments', function () {
-      var price = faker.commerce.price();
-
-      var decimal = '.';
-      var expected = price.length - 3;
-      var actual = price.indexOf(decimal);
-
-      assert.strictEqual(
-        actual,
-        expected,
-        'The expected location of the decimal is ' +
-          expected +
-          ' but it was ' +
-          actual +
-          ' amount ' +
-          price
-      );
-    });
-
-    it('should not include a currency symbol by default', function () {
-      var amount = faker.commerce.price();
-
-      var regexp = new RegExp(/[0-9.]/);
-
-      var expected = true;
-      var actual = regexp.test(amount);
-
-      assert.strictEqual(
-        actual,
-        expected,
-        'The expected match should not include a currency symbol'
-      );
-    });
-
-    it('it should handle negative amounts, but return 0', function () {
-      var amount = faker.commerce.price(-200, -1);
-
-      assert.ok(amount);
-      assert.strictEqual(amount == 0.0, true, 'the amount should equal 0');
-    });
-
-    it('it should handle argument dec', function () {
-      var price = faker.commerce.price(100, 100, 1);
-
-      assert.ok(price);
-      assert.strictEqual(price, '100.0', 'the price should be equal 100.0');
-    });
-
-    it('it should handle argument dec = 0', function () {
-      var price = faker.commerce.price(100, 100, 0);
-
-      assert.ok(price);
-      assert.strictEqual(price, '100', 'the price should be equal 100');
-    });
-  });
-
-  describe('productDescription()', function () {
-    it('returns a random product description', function () {
-      sinon.spy(faker.commerce, 'productDescription');
-      var description = faker.commerce.productDescription();
-
-      assert.ok(typeof description === 'string');
-      assert.ok(faker.commerce.productDescription.calledOnce);
-
-      faker.commerce.productDescription.restore();
-    });
-  });
-});
diff --git a/test/company.spec.ts b/test/company.spec.ts
new file mode 100644
index 00000000..4fe37eee
--- /dev/null
+++ b/test/company.spec.ts
@@ -0,0 +1,120 @@
+import { describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+describe('company', () => {
+  describe('companyName()', () => {
+    it('sometimes returns three last names', () => {
+      const spy_name_lastName = vi.spyOn(faker.name, 'lastName');
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockReturnValue(2);
+
+      const name = faker.company.companyName();
+      const parts = name.split(' ');
+
+      expect(parts.length).toBe(4); // account for word 'and'
+      expect(spy_name_lastName).toHaveBeenCalledTimes(3);
+
+      spy_datatype_number.mockRestore();
+      spy_name_lastName.mockRestore();
+    });
+
+    it('sometimes returns two last names separated by a hyphen', () => {
+      const spy_name_lastName = vi.spyOn(faker.name, 'lastName');
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockReturnValue(1);
+
+      const name = faker.company.companyName();
+      const parts = name.split('-');
+
+      expect(parts.length).greaterThanOrEqual(2);
+      expect(spy_name_lastName).toHaveBeenCalledTimes(2);
+
+      spy_datatype_number.mockRestore();
+      spy_name_lastName.mockRestore();
+    });
+
+    it('sometimes returns a last name with a company suffix', () => {
+      const spy_company_companySuffix = vi.spyOn(
+        faker.company,
+        'companySuffix'
+      );
+      const spy_name_lastName = vi.spyOn(faker.name, 'lastName');
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockReturnValue(0);
+
+      const name = faker.company.companyName();
+      const parts = name.split(' ');
+
+      expect(parts.length).greaterThanOrEqual(2);
+      expect(spy_name_lastName).toHaveBeenCalledOnce();
+      expect(spy_company_companySuffix).toHaveBeenCalledOnce();
+
+      spy_datatype_number.mockRestore();
+      spy_name_lastName.mockRestore();
+      spy_company_companySuffix.mockRestore();
+    });
+  });
+
+  describe('companySuffix()', () => {
+    it('returns random value from company.suffixes array', () => {
+      const suffix = faker.company.companySuffix();
+      expect(faker.company.suffixes()).toContain(suffix);
+    });
+  });
+
+  describe('catchPhrase()', () => {
+    it('returns phrase comprising of a catch phrase adjective, descriptor, and noun', () => {
+      const spy_random_arrayElement = vi.spyOn(faker.random, 'arrayElement');
+      const spy_company_catchPhraseAdjective = vi.spyOn(
+        faker.company,
+        'catchPhraseAdjective'
+      );
+      const spy_company_catchPhraseDescriptor = vi.spyOn(
+        faker.company,
+        'catchPhraseDescriptor'
+      );
+      const spy_company_catchPhraseNoun = vi.spyOn(
+        faker.company,
+        'catchPhraseNoun'
+      );
+
+      const phrase = faker.company.catchPhrase();
+
+      expect(phrase.split(' ').length).greaterThanOrEqual(3);
+      expect(spy_random_arrayElement).toHaveBeenCalledTimes(3);
+      expect(spy_company_catchPhraseAdjective).toHaveBeenCalledOnce();
+      expect(spy_company_catchPhraseDescriptor).toHaveBeenCalledOnce();
+      expect(spy_company_catchPhraseNoun).toHaveBeenCalledOnce();
+
+      spy_random_arrayElement.mockRestore();
+      spy_company_catchPhraseAdjective.mockRestore();
+      spy_company_catchPhraseDescriptor.mockRestore();
+      spy_company_catchPhraseNoun.mockRestore();
+    });
+  });
+
+  describe('bs()', () => {
+    it('returns phrase comprising of a BS buzz, adjective, and noun', () => {
+      const spy_random_arrayElement = vi.spyOn(faker.random, 'arrayElement');
+      const spy_company_bsBuzz = vi.spyOn(faker.company, 'bsBuzz');
+      const spy_company_bsAdjective = vi.spyOn(faker.company, 'bsAdjective');
+      const spy_company_bsNoun = vi.spyOn(faker.company, 'bsNoun');
+
+      const bs = faker.company.bs();
+
+      expect(typeof bs).toBe('string');
+      expect(spy_random_arrayElement).toHaveBeenCalledTimes(3);
+      expect(spy_company_bsBuzz).toHaveBeenCalledOnce();
+      expect(spy_company_bsAdjective).toHaveBeenCalledOnce();
+      expect(spy_company_bsNoun).toHaveBeenCalledOnce();
+
+      spy_random_arrayElement.mockRestore();
+      spy_company_bsBuzz.mockRestore();
+      spy_company_bsAdjective.mockRestore();
+      spy_company_bsNoun.mockRestore();
+    });
+  });
+});
diff --git a/test/company.unit.js b/test/company.unit.js
deleted file mode 100644
index eccadb9f..00000000
--- a/test/company.unit.js
+++ /dev/null
@@ -1,100 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('company.js', function () {
-  describe('companyName()', function () {
-    it('sometimes returns three last names', function () {
-      sinon.spy(faker.name, 'lastName');
-      sinon.stub(faker.datatype, 'number').returns(2);
-      var name = faker.company.companyName();
-      var parts = name.split(' ');
-
-      assert.strictEqual(parts.length, 4); // account for word 'and'
-      assert.ok(faker.name.lastName.calledThrice);
-
-      faker.datatype.number.restore();
-      faker.name.lastName.restore();
-    });
-
-    it('sometimes returns two last names separated by a hyphen', function () {
-      sinon.spy(faker.name, 'lastName');
-      sinon.stub(faker.datatype, 'number').returns(1);
-      var name = faker.company.companyName();
-      var parts = name.split('-');
-
-      assert.ok(parts.length >= 2);
-      assert.ok(faker.name.lastName.calledTwice);
-
-      faker.datatype.number.restore();
-      faker.name.lastName.restore();
-    });
-
-    it('sometimes returns a last name with a company suffix', function () {
-      sinon.spy(faker.company, 'companySuffix');
-      sinon.spy(faker.name, 'lastName');
-      sinon.stub(faker.datatype, 'number').returns(0);
-      var name = faker.company.companyName();
-      var parts = name.split(' ');
-
-      assert.ok(parts.length >= 2);
-      assert.ok(faker.name.lastName.calledOnce);
-      assert.ok(faker.company.companySuffix.calledOnce);
-
-      faker.datatype.number.restore();
-      faker.name.lastName.restore();
-      faker.company.companySuffix.restore();
-    });
-  });
-
-  describe('companySuffix()', function () {
-    it('returns random value from company.suffixes array', function () {
-      var suffix = faker.company.companySuffix();
-      assert.ok(faker.company.suffixes().indexOf(suffix) !== -1);
-    });
-  });
-
-  describe('catchPhrase()', function () {
-    it('returns phrase comprising of a catch phrase adjective, descriptor, and noun', function () {
-      sinon.spy(faker.random, 'arrayElement');
-      sinon.spy(faker.company, 'catchPhraseAdjective');
-      sinon.spy(faker.company, 'catchPhraseDescriptor');
-      sinon.spy(faker.company, 'catchPhraseNoun');
-      var phrase = faker.company.catchPhrase();
-
-      assert.ok(phrase.split(' ').length >= 3);
-      assert.ok(faker.random.arrayElement.calledThrice);
-      assert.ok(faker.company.catchPhraseAdjective.calledOnce);
-      assert.ok(faker.company.catchPhraseDescriptor.calledOnce);
-      assert.ok(faker.company.catchPhraseNoun.calledOnce);
-
-      faker.random.arrayElement.restore();
-      faker.company.catchPhraseAdjective.restore();
-      faker.company.catchPhraseDescriptor.restore();
-      faker.company.catchPhraseNoun.restore();
-    });
-  });
-
-  describe('bs()', function () {
-    it('returns phrase comprising of a BS buzz, adjective, and noun', function () {
-      sinon.spy(faker.random, 'arrayElement');
-      sinon.spy(faker.company, 'bsBuzz');
-      sinon.spy(faker.company, 'bsAdjective');
-      sinon.spy(faker.company, 'bsNoun');
-      var bs = faker.company.bs();
-
-      assert.ok(typeof bs === 'string');
-      assert.ok(faker.random.arrayElement.calledThrice);
-      assert.ok(faker.company.bsBuzz.calledOnce);
-      assert.ok(faker.company.bsAdjective.calledOnce);
-      assert.ok(faker.company.bsNoun.calledOnce);
-
-      faker.random.arrayElement.restore();
-      faker.company.bsBuzz.restore();
-      faker.company.bsAdjective.restore();
-      faker.company.bsNoun.restore();
-    });
-  });
-});
diff --git a/test/database.spec.ts b/test/database.spec.ts
new file mode 100644
index 00000000..1d551339
--- /dev/null
+++ b/test/database.spec.ts
@@ -0,0 +1,82 @@
+import { describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+describe('database', () => {
+  describe('column()', () => {
+    it('returns a column name', () => {
+      const spy_database_column = vi
+        .spyOn(faker.database, 'column')
+        .mockReturnValue('title');
+
+      const column = faker.database.column();
+      const expected = 'title';
+
+      expect(
+        column,
+        'The column name should be equals ' +
+          expected +
+          '. Current is ' +
+          column
+      ).toBe(expected);
+
+      spy_database_column.mockRestore();
+    });
+  });
+
+  describe('collation()', () => {
+    it('returns a collation', () => {
+      const spy_database_collation = vi
+        .spyOn(faker.database, 'collation')
+        .mockReturnValue('utf8_bin');
+
+      const collation = faker.database.collation();
+      const expected = 'utf8_bin';
+
+      expect(
+        collation,
+        'The collation should be equals ' +
+          expected +
+          '. Current is ' +
+          collation
+      ).toBe(expected);
+
+      spy_database_collation.mockRestore();
+    });
+  });
+
+  describe('engine()', () => {
+    it('returns an engine', () => {
+      const spy_database_engine = vi
+        .spyOn(faker.database, 'engine')
+        .mockReturnValue('InnoDB');
+
+      const engine = faker.database.engine();
+      const expected = 'InnoDB';
+
+      expect(
+        engine,
+        'The db engine should be equals ' + expected + '. Current is ' + engine
+      ).toBe(expected);
+
+      spy_database_engine.mockRestore();
+    });
+  });
+
+  describe('type()', () => {
+    it('returns a column type', () => {
+      const spy_database_type = vi
+        .spyOn(faker.database, 'type')
+        .mockReturnValue('int');
+
+      const type = faker.database.type();
+      const expected = 'int';
+
+      expect(
+        type,
+        'The column type should be equals ' + expected + '. Current is ' + type
+      ).toBe(expected);
+
+      spy_database_type.mockRestore();
+    });
+  });
+});
diff --git a/test/database.unit.js b/test/database.unit.js
deleted file mode 100644
index 78420fcb..00000000
--- a/test/database.unit.js
+++ /dev/null
@@ -1,73 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('database.js', function () {
-  describe('column()', function () {
-    it('returns a column name', function () {
-      sinon.stub(faker.database, 'column').returns('title');
-      var column = faker.database.column();
-      var expected = 'title';
-
-      assert.strictEqual(
-        column,
-        expected,
-        'The column name should be equals ' +
-          expected +
-          '. Current is ' +
-          column
-      );
-      faker.database.column.restore();
-    });
-  });
-
-  describe('collation()', function () {
-    it('returns a collation', function () {
-      sinon.stub(faker.database, 'collation').returns('utf8_bin');
-      var collation = faker.database.collation();
-      var expected = 'utf8_bin';
-
-      assert.strictEqual(
-        collation,
-        expected,
-        'The collation should be equals ' +
-          expected +
-          '. Current is ' +
-          collation
-      );
-      faker.database.collation.restore();
-    });
-  });
-
-  describe('engine()', function () {
-    it('returns an engine', function () {
-      sinon.stub(faker.database, 'engine').returns('InnoDB');
-      var engine = faker.database.engine();
-      var expected = 'InnoDB';
-
-      assert.strictEqual(
-        engine,
-        expected,
-        'The db engine should be equals ' + expected + '. Current is ' + engine
-      );
-      faker.database.engine.restore();
-    });
-  });
-
-  describe('type()', function () {
-    it('returns a column type', function () {
-      sinon.stub(faker.database, 'type').returns('int');
-      var type = faker.database.type();
-      var expected = 'int';
-
-      assert.strictEqual(
-        type,
-        expected,
-        'The column type should be equals ' + expected + '. Current is ' + type
-      );
-      faker.database.type.restore();
-    });
-  });
-});
diff --git a/test/datatype.spec.ts b/test/datatype.spec.ts
new file mode 100644
index 00000000..38314951
--- /dev/null
+++ b/test/datatype.spec.ts
@@ -0,0 +1,306 @@
+import { describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+describe('datatype', () => {
+  describe('number', () => {
+    it('returns a random number given a maximum value as Number', () => {
+      const max = 10;
+      expect(faker.datatype.number(max)).lessThanOrEqual(max);
+    });
+
+    it('returns a random number given a maximum value as Object', () => {
+      const options = { max: 10 };
+      expect(faker.datatype.number(options)).lessThanOrEqual(options.max);
+    });
+
+    it('returns a random number given a maximum value of 0', () => {
+      const options = { max: 0 };
+      expect(faker.datatype.number(options)).toBe(0);
+    });
+
+    it('returns a random number given a negative number minimum and maximum value of 0', () => {
+      const options = { min: -100, max: 0 };
+      expect(faker.datatype.number(options)).lessThanOrEqual(options.max);
+    });
+
+    it('returns a random number between a range', () => {
+      const options = { min: 22, max: 33 };
+      for (let i = 0; i < 100; i++) {
+        const randomNumber = faker.datatype.number(options);
+        expect(randomNumber).greaterThanOrEqual(options.min);
+        expect(randomNumber).lessThanOrEqual(options.max);
+      }
+    });
+
+    it('provides numbers with a given precision', () => {
+      const options = { min: 0, max: 1.5, precision: 0.5 };
+      const results = Array.from(
+        new Set(
+          Array.from({ length: 50 }, () => faker.datatype.number(options))
+        )
+      ).sort();
+
+      expect(results).toContain(0.5);
+      expect(results).toContain(1.0);
+
+      expect(results[0]).toBe(0);
+      expect(results[results.length - 1]).toBe(1.5);
+    });
+
+    it('provides numbers with a with exact precision', () => {
+      const options = { min: 0.5, max: 0.99, precision: 0.01 };
+      for (let i = 0; i < 100; i++) {
+        const number = faker.datatype.number(options);
+        expect(number).toBe(Number(number.toFixed(2)));
+      }
+    });
+
+    it('should not modify the input object', () => {
+      const min = 1;
+      const max = 2;
+      const opts = {
+        min: min,
+        max: max,
+      };
+
+      faker.datatype.number(opts);
+
+      expect(opts.min).toBe(min);
+      expect(opts.max).toBe(max);
+    });
+  });
+
+  describe('float', () => {
+    it('returns a random float with a default precision value (0.01)', () => {
+      const number = faker.datatype.float();
+      expect(number).toBe(Number(number.toFixed(2)));
+    });
+
+    it('returns a random float given a precision value', () => {
+      const number = faker.datatype.float(0.001);
+      expect(number).toBe(Number(number.toFixed(3)));
+    });
+
+    it('returns a random number given a maximum value as Object', () => {
+      const options = { max: 10 };
+      expect(faker.datatype.float(options)).lessThanOrEqual(options.max);
+    });
+
+    it('returns a random number given a maximum value of 0', () => {
+      const options = { max: 0 };
+      expect(faker.datatype.float(options)).toBe(0);
+    });
+
+    it('returns a random number given a negative number minimum and maximum value of 0', () => {
+      const options = { min: -100, max: 0 };
+      expect(faker.datatype.float(options)).lessThanOrEqual(options.max);
+    });
+
+    it('returns a random number between a range', () => {
+      const options = { min: 22, max: 33 };
+      for (let i = 0; i < 5; i++) {
+        const randomNumber = faker.datatype.float(options);
+        expect(randomNumber).greaterThanOrEqual(options.min);
+        expect(randomNumber).lessThanOrEqual(options.max);
+      }
+    });
+
+    it('provides numbers with a given precision', () => {
+      const options = { min: 0, max: 1.5, precision: 0.5 };
+      const results = Array.from(
+        new Set(Array.from({ length: 50 }, () => faker.datatype.float(options)))
+      ).sort();
+
+      expect(results).toContain(0.5);
+      expect(results).toContain(1.0);
+
+      expect(results[0]).toBe(0);
+      expect(results[results.length - 1]).toBe(1.5);
+    });
+
+    it('provides numbers with a with exact precision', () => {
+      const options = { min: 0.5, max: 0.99, precision: 0.01 };
+      for (let i = 0; i < 100; i++) {
+        const number = faker.datatype.float(options);
+        expect(number).toBe(Number(number.toFixed(2)));
+      }
+    });
+
+    it('should not modify the input object', () => {
+      const min = 1;
+      const max = 2;
+      const opts = {
+        min: min,
+        max: max,
+      };
+
+      faker.datatype.float(opts);
+
+      expect(opts.min).toBe(min);
+      expect(opts.max).toBe(max);
+    });
+  });
+
+  describe('datetime', () => {
+    it('check validity of date and if returned value is created by Date()', () => {
+      const date = faker.datatype.datetime();
+      expect(typeof date).toBe('object');
+      expect(date.getTime()).not.toBeNaN();
+      expect(Object.prototype.toString.call(date)).toBe('[object Date]');
+    });
+
+    it('basic test with stubbed value', () => {
+      const today = new Date();
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockReturnValue(today.getTime());
+
+      const date = faker.datatype.datetime();
+      expect(today.valueOf()).toBe(date.valueOf());
+
+      spy_datatype_number.mockRestore();
+    });
+
+    //generating a datetime with seeding is currently not working
+  });
+
+  describe('string', () => {
+    it('should generate a string value', () => {
+      const generatedString = faker.datatype.string();
+      expect(typeof generatedString).toBe('string');
+      expect(generatedString).toHaveLength(10);
+    });
+
+    it('should generate a string value, checks seeding', () => {
+      faker.seed(100);
+      const generatedString = faker.datatype.string();
+      expect(generatedString).toBe('S_:GHQo.!/');
+    });
+
+    it('returns empty string if negative length is passed', () => {
+      const negativeValue = faker.datatype.number({ min: -1000, max: -1 });
+      const generatedString = faker.datatype.string(negativeValue);
+      expect(generatedString).toBe('');
+      expect(generatedString).toHaveLength(0);
+    });
+
+    it('returns string with length of 2^20 if bigger length value is passed', () => {
+      const overMaxValue = Math.pow(2, 28);
+      const generatedString = faker.datatype.string(overMaxValue);
+      expect(generatedString).toHaveLength(Math.pow(2, 20));
+    });
+  });
+
+  describe('boolean', () => {
+    it('generates a boolean value', () => {
+      const bool = faker.datatype.boolean();
+      expect(typeof bool).toBe('boolean');
+    });
+    it('generates a boolean value, checks seeding', () => {
+      faker.seed(1);
+      const bool = faker.datatype.boolean();
+      expect(bool).toBe(false);
+    });
+  });
+
+  describe('UUID', () => {
+    it('generates a valid UUID', () => {
+      const UUID = faker.datatype.uuid();
+      const RFC4122 =
+        /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/;
+      expect(UUID).match(RFC4122);
+    });
+  });
+
+  describe('hexaDecimal', () => {
+    const hexaDecimal = faker.datatype.hexaDecimal;
+
+    it('generates single hex character when no additional argument was provided', () => {
+      const hex = hexaDecimal();
+      expect(hex).match(/^(0x)[0-9a-f]{1}$/i);
+    });
+
+    it('generates a random hex string', () => {
+      const hex = hexaDecimal(5);
+      expect(hex).match(/^(0x)[0-9a-f]+$/i);
+    });
+  });
+
+  describe('json', () => {
+    it('generates a valid json object', () => {
+      const jsonObject = faker.datatype.json();
+      expect(typeof jsonObject).toBe('string');
+      expect(JSON.parse(jsonObject)).toBeTruthy();
+    });
+
+    it('generates a valid json object, with seeding', () => {
+      faker.seed(10);
+      const jsonObject = faker.datatype.json();
+      const parsedObject = JSON.parse(jsonObject);
+      expect(typeof jsonObject).toBe('string');
+      expect(parsedObject.foo).toBe('<"N[JfnOW5');
+      expect(parsedObject.bar).toStrictEqual(19806);
+      expect(parsedObject.bike).toBe('g909).``yl');
+      expect(parsedObject.a).toStrictEqual(33607);
+      expect(parsedObject.b).toBe('sl3Y#dr<dv');
+      expect(parsedObject.name).toBe('c-SG.iCW_1');
+      expect(parsedObject.prop).toStrictEqual(82608);
+    });
+  });
+
+  describe('array', () => {
+    it('generates an array', () => {
+      // TODO @Shinigami92 2022-01-20: Currently this test seems to just do:
+      //      => expect(typeof faker.datatype.array).toBe('function')
+
+      const stubArray = [0, 1, 3, 4, 5, 6, 1, 'a', 'b', 'c'];
+      const spy_datatype_array = vi
+        .spyOn(faker.datatype, 'array')
+        .mockReturnValue(stubArray);
+
+      const generatedArray = faker.datatype.array();
+
+      expect(generatedArray).toHaveLength(stubArray.length);
+      expect(stubArray).toStrictEqual(generatedArray);
+
+      spy_datatype_array.mockRestore();
+    });
+
+    it('generates an array with passed size', () => {
+      const randomSize = faker.datatype.number();
+      const generatedArray = faker.datatype.array(randomSize);
+      expect(generatedArray).toHaveLength(randomSize);
+    });
+
+    it('generates an array with 1 element, with seeding', () => {
+      faker.seed(10);
+      const generatedArray = faker.datatype.array(1);
+      expect(generatedArray[0]).toBe('<"N[JfnOW5');
+    });
+  });
+
+  describe('bigInt', () => {
+    it('should generate a bigInt value', () => {
+      const generateBigInt = faker.datatype.bigInt();
+      expect(typeof generateBigInt).toBe('bigint');
+    });
+
+    it('Generate and compare two numbers of data type BigInt, with seeding', () => {
+      faker.seed(123);
+      const generateBigInt1 = faker.datatype.bigInt();
+      faker.seed(123);
+      const generateBigInt2 = faker.datatype.bigInt();
+      expect(generateBigInt1).toBe(generateBigInt2);
+    });
+
+    it('summing with the Number datatype should be an error', (done) => {
+      // TODO @Shinigami92 2022-01-20: Maybe we can remove this test, we should not test JS itself
+      try {
+        // @ts-expect-error
+        faker.datatype.bigInt() + 10;
+      } catch (error) {
+        done();
+      }
+    });
+  });
+});
diff --git a/test/datatype.unit.js b/test/datatype.unit.js
deleted file mode 100644
index 3efa6b39..00000000
--- a/test/datatype.unit.js
+++ /dev/null
@@ -1,302 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var _ = require('lodash');
-  var faker = require('../lib').faker;
-  var mersenne = require('../vendor/mersenne');
-}
-
-describe('datatype.js', function () {
-  describe('number', function () {
-    it('returns a random number given a maximum value as Number', function () {
-      var max = 10;
-      assert.ok(faker.datatype.number(max) <= max);
-    });
-
-    it('returns a random number given a maximum value as Object', function () {
-      var options = { max: 10 };
-      assert.ok(faker.datatype.number(options) <= options.max);
-    });
-
-    it('returns a random number given a maximum value of 0', function () {
-      var options = { max: 0 };
-      assert.ok(faker.datatype.number(options) === 0);
-    });
-
-    it('returns a random number given a negative number minimum and maximum value of 0', function () {
-      var options = { min: -100, max: 0 };
-      assert.ok(faker.datatype.number(options) <= options.max);
-    });
-
-    it('returns a random number between a range', function () {
-      var options = { min: 22, max: 33 };
-      for (var i = 0; i < 100; i++) {
-        var randomNumber = faker.datatype.number(options);
-        assert.ok(randomNumber >= options.min);
-        assert.ok(randomNumber <= options.max);
-      }
-    });
-
-    it('provides numbers with a given precision', function () {
-      var options = { min: 0, max: 1.5, precision: 0.5 };
-      var results = _.chain(_.range(50))
-        .map(function () {
-          return faker.datatype.number(options);
-        })
-        .uniq()
-        .value()
-        .sort();
-
-      assert.ok(_.includes(results, 0.5));
-      assert.ok(_.includes(results, 1.0));
-
-      assert.strictEqual(results[0], 0);
-      assert.strictEqual(_.last(results), 1.5);
-    });
-
-    it('provides numbers with a with exact precision', function () {
-      var options = { min: 0.5, max: 0.99, precision: 0.01 };
-      for (var i = 0; i < 100; i++) {
-        var number = faker.datatype.number(options);
-        assert.strictEqual(number, Number(number.toFixed(2)));
-      }
-    });
-
-    it('should not modify the input object', function () {
-      var min = 1;
-      var max = 2;
-      var opts = {
-        min: min,
-        max: max,
-      };
-
-      faker.datatype.number(opts);
-
-      assert.strictEqual(opts.min, min);
-      assert.strictEqual(opts.max, max);
-    });
-  });
-
-  describe('float', function () {
-    it('returns a random float with a default precision value (0.01)', function () {
-      var number = faker.datatype.float();
-      assert.strictEqual(number, Number(number.toFixed(2)));
-    });
-
-    it('returns a random float given a precision value', function () {
-      var number = faker.datatype.float(0.001);
-      assert.strictEqual(number, Number(number.toFixed(3)));
-    });
-
-    it('returns a random number given a maximum value as Object', function () {
-      var options = { max: 10 };
-      assert.ok(faker.datatype.float(options) <= options.max);
-    });
-
-    it('returns a random number given a maximum value of 0', function () {
-      var options = { max: 0 };
-      assert.ok(faker.datatype.float(options) === 0);
-    });
-
-    it('returns a random number given a negative number minimum and maximum value of 0', function () {
-      var options = { min: -100, max: 0 };
-      assert.ok(faker.datatype.float(options) <= options.max);
-    });
-
-    it('returns a random number between a range', function () {
-      var options = { min: 22, max: 33 };
-      for (var i = 0; i < 5; i++) {
-        var randomNumber = faker.datatype.float(options);
-        assert.ok(randomNumber >= options.min);
-        assert.ok(randomNumber <= options.max);
-      }
-    });
-
-    it('provides numbers with a given precision', function () {
-      var options = { min: 0, max: 1.5, precision: 0.5 };
-      var results = _.chain(_.range(50))
-        .map(function () {
-          return faker.datatype.float(options);
-        })
-        .uniq()
-        .value()
-        .sort();
-
-      assert.ok(_.includes(results, 0.5));
-      assert.ok(_.includes(results, 1.0));
-
-      assert.strictEqual(results[0], 0);
-      assert.strictEqual(_.last(results), 1.5);
-    });
-
-    it('provides numbers with a with exact precision', function () {
-      var options = { min: 0.5, max: 0.99, precision: 0.01 };
-      for (var i = 0; i < 100; i++) {
-        var number = faker.datatype.float(options);
-        assert.strictEqual(number, Number(number.toFixed(2)));
-      }
-    });
-
-    it('should not modify the input object', function () {
-      var min = 1;
-      var max = 2;
-      var opts = {
-        min: min,
-        max: max,
-      };
-
-      faker.datatype.float(opts);
-
-      assert.strictEqual(opts.min, min);
-      assert.strictEqual(opts.max, max);
-    });
-  });
-
-  describe('datetime', function () {
-    it('check validity of date and if returned value is created by Date()', function () {
-      var date = faker.datatype.datetime();
-      assert.strictEqual(typeof date, 'object');
-      assert.ok(!isNaN(date.getTime()));
-      assert.strictEqual(Object.prototype.toString.call(date), '[object Date]');
-    });
-    it('basic test with stubbed value', function () {
-      var today = new Date();
-      sinon.stub(faker.datatype, 'number').returns(today);
-      var date = faker.datatype.datetime();
-      assert.strictEqual(today.valueOf(), date.valueOf());
-      faker.datatype.number.restore();
-    });
-
-    //generating a datetime with seeding is currently not working
-  });
-
-  describe('string', function () {
-    it('should generate a string value', function () {
-      var generateString = faker.datatype.string();
-      assert.strictEqual(typeof generateString, 'string');
-      assert.strictEqual(generateString.length, 10);
-    });
-
-    it('should generate a string value, checks seeding', function () {
-      faker.seed(100);
-      var generateString = faker.datatype.string();
-      assert.strictEqual(generateString, 'S_:GHQo.!/');
-    });
-
-    it('returns empty string if negative length is passed', function () {
-      var negativeValue = faker.datatype.number({ min: -1000, max: -1 });
-      var generateString = faker.datatype.string(negativeValue);
-      assert.strictEqual(generateString, '');
-      assert.strictEqual(generateString.length, 0);
-    });
-
-    it('returns string with length of 2^20 if bigger length value is passed', function () {
-      var overMaxValue = Math.pow(2, 28);
-      var generateString = faker.datatype.string(overMaxValue);
-      assert.strictEqual(generateString.length, Math.pow(2, 20));
-    });
-  });
-
-  describe('boolean', function () {
-    it('generates a boolean value', function () {
-      var bool = faker.datatype.boolean();
-      assert.strictEqual(typeof bool, 'boolean');
-    });
-    it('generates a boolean value, checks seeding', function () {
-      faker.seed(1);
-      var bool = faker.datatype.boolean();
-      assert.strictEqual(bool, false);
-    });
-  });
-
-  describe('UUID', function () {
-    it('generates a valid UUID', function () {
-      var UUID = faker.datatype.uuid();
-      var RFC4122 =
-        /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/;
-      assert.ok(RFC4122.test(UUID));
-    });
-  });
-
-  describe('hexaDecimal', function () {
-    var hexaDecimal = faker.datatype.hexaDecimal;
-
-    it('generates single hex character when no additional argument was provided', function () {
-      var hex = hexaDecimal();
-      assert.ok(hex.match(/^(0x)[0-9a-f]{1}$/i));
-    });
-
-    it('generates a random hex string', function () {
-      var hex = hexaDecimal(5);
-      assert.ok(hex.match(/^(0x)[0-9a-f]+$/i));
-    });
-  });
-
-  describe('json', function () {
-    it('generates a valid json object', function () {
-      var jsonObject = faker.datatype.json();
-      assert.strictEqual(typeof jsonObject, 'string');
-      assert.ok(JSON.parse(jsonObject));
-    });
-
-    it('generates a valid json object, with seeding', function () {
-      faker.seed(10);
-      var jsonObject = faker.datatype.json();
-      var parsedObject = JSON.parse(jsonObject);
-      assert.strictEqual(typeof jsonObject, 'string');
-      assert.strictEqual(parsedObject.foo, '<"N[JfnOW5');
-      assert.strictEqual(parsedObject.bar, 19806);
-      assert.strictEqual(parsedObject.bike, 'g909).``yl');
-      assert.strictEqual(parsedObject.a, 33607);
-      assert.strictEqual(parsedObject.b, 'sl3Y#dr<dv');
-      assert.strictEqual(parsedObject.name, 'c-SG.iCW_1');
-      assert.strictEqual(parsedObject.prop, 82608);
-    });
-  });
-
-  describe('array', function () {
-    it('generates an array', function () {
-      var stubArray = [0, 1, 3, 4, 5, 6, 1, 'a', 'b', 'c'];
-      sinon.stub(faker.datatype, 'array').returns(stubArray);
-      var generatedArray = faker.datatype.array();
-      assert.strictEqual(generatedArray.length, stubArray.length);
-      assert.strictEqual(stubArray, generatedArray);
-      faker.datatype.array.restore();
-    });
-
-    it('generates an array with passed size', function () {
-      var randomSize = faker.datatype.number();
-      var generatedArray = faker.datatype.array(randomSize);
-      assert.strictEqual(generatedArray.length, randomSize);
-    });
-
-    it('generates an array with 1 element, with seeding', function () {
-      faker.seed(10);
-      var generatedArray = faker.datatype.array(1);
-      assert.strictEqual(generatedArray[0], '<"N[JfnOW5');
-    });
-  });
-
-  describe('bigInt', function () {
-    it('should generate a bigInt value', function () {
-      var generateBigInt = faker.datatype.bigInt();
-      assert.strictEqual(typeof generateBigInt, 'bigint');
-    });
-
-    it('Generate and compare two numbers of data type BigInt, with seeding', function () {
-      faker.seed(123);
-      var generateBigInt1 = faker.datatype.bigInt();
-      faker.seed(123);
-      var generateBigInt2 = faker.datatype.bigInt();
-      assert.strictEqual(generateBigInt1, generateBigInt2);
-    });
-
-    it('summing with the Number datatype should be an error', function (done) {
-      try {
-        faker.datatype.bigInt() + 10;
-      } catch (error) {
-        done();
-      }
-    });
-  });
-});
diff --git a/test/date.spec.ts b/test/date.spec.ts
new file mode 100644
index 00000000..8f7aa214
--- /dev/null
+++ b/test/date.spec.ts
@@ -0,0 +1,235 @@
+import { describe, expect, it } from 'vitest';
+import { faker } from '../lib';
+
+describe('date', () => {
+  describe('past()', () => {
+    it('returns a date N years into the past', () => {
+      const date = faker.date.past(75);
+      expect(date).lessThan(new Date());
+    });
+
+    it('returns a past date when N = 0', () => {
+      const refDate = new Date();
+      const date = faker.date.past(0, refDate.toJSON());
+
+      expect(date).lessThan(refDate); // date should be before the date given
+    });
+
+    it('returns a date N years before the date given', () => {
+      const refDate = new Date(2120, 11, 9, 10, 0, 0, 0); // set the date beyond the usual calculation (to make sure this is working correctly)
+
+      const date = faker.date.past(75, refDate.toJSON());
+
+      // date should be before date given but after the current time
+      expect(date).lessThan(refDate);
+      expect(date).greaterThan(new Date());
+    });
+  });
+
+  describe('future()', () => {
+    it('returns a date N years into the future', () => {
+      const date = faker.date.future(75);
+
+      expect(date).greaterThan(new Date());
+    });
+
+    it('returns a future date when N = 0', () => {
+      const refDate = new Date();
+      const date = faker.date.future(0, refDate.toJSON());
+
+      expect(date).greaterThan(refDate); // date should be after the date given
+    });
+
+    it('returns a date N years after the date given', () => {
+      const refDate = new Date(1880, 11, 9, 10, 0, 0, 0); // set the date beyond the usual calculation (to make sure this is working correctly)
+
+      const date = faker.date.future(75, refDate.toJSON());
+
+      // date should be after the date given, but before the current time
+      expect(date).greaterThan(refDate);
+      expect(date).lessThan(new Date());
+    });
+  });
+
+  describe('recent()', () => {
+    it('returns a date N days from the recent past', () => {
+      const date = faker.date.recent(30);
+
+      expect(date).lessThanOrEqual(new Date());
+    });
+
+    it('returns a date N days from the recent past, starting from refDate', () => {
+      const days = 30;
+      const refDate = new Date(2120, 11, 9, 10, 0, 0, 0); // set the date beyond the usual calculation (to make sure this is working correctly)
+
+      const date = faker.date.recent(
+        days,
+        // @ts-expect-error
+        refDate
+      );
+
+      const lowerBound = new Date(
+        refDate.getTime() - days * 24 * 60 * 60 * 1000
+      );
+
+      expect(
+        lowerBound,
+        '`recent()` date should not be further back than `n` days ago'
+      ).lessThanOrEqual(date);
+      expect(
+        date,
+        '`recent()` date should not be ahead of the starting date reference'
+      ).lessThanOrEqual(refDate);
+    });
+  });
+
+  describe('soon()', () => {
+    it('returns a date N days into the future', () => {
+      const date = faker.date.soon(30);
+
+      expect(date).greaterThanOrEqual(new Date());
+    });
+
+    it('returns a date N days from the recent future, starting from refDate', () => {
+      const days = 30;
+      const refDate = new Date(1880, 11, 9, 10, 0, 0, 0); // set the date beyond the usual calculation (to make sure this is working correctly)
+
+      const date = faker.date.soon(
+        days,
+        // @ts-expect-error
+        refDate
+      );
+
+      const upperBound = new Date(
+        refDate.getTime() + days * 24 * 60 * 60 * 1000
+      );
+
+      expect(
+        date,
+        '`soon()` date should not be further ahead than `n` days ago'
+      ).lessThanOrEqual(upperBound);
+      expect(
+        refDate,
+        '`soon()` date should not be behind the starting date reference'
+      ).lessThanOrEqual(date);
+    });
+  });
+
+  describe('between()', () => {
+    it('returns a random date between the dates given', () => {
+      const from = new Date(1990, 5, 7, 9, 11, 0, 0);
+      const to = new Date(2000, 6, 8, 10, 12, 0, 0);
+
+      const date = faker.date.between(
+        //@ts-expect-error
+        from,
+        to
+      );
+
+      expect(date).greaterThan(from);
+      expect(date).lessThan(to);
+    });
+  });
+
+  describe('betweens()', () => {
+    it('returns an array of 3 dates ( by default ) of sorted randoms dates between the dates given', () => {
+      const from = new Date(1990, 5, 7, 9, 11, 0, 0);
+      const to = new Date(2000, 6, 8, 10, 12, 0, 0);
+
+      const dates = faker.date.betweens(
+        // @ts-expect-error
+        from,
+        to
+      );
+
+      expect(dates[0]).greaterThan(from);
+      expect(dates[0]).lessThan(to);
+      expect(dates[1]).greaterThan(dates[0]);
+      expect(dates[2]).greaterThan(dates[1]);
+    });
+  });
+
+  describe('month()', () => {
+    it('returns random value from date.month.wide array by default', () => {
+      const month = faker.date.month();
+      expect(faker.definitions.date.month.wide).toContain(month);
+    });
+
+    it('returns random value from date.month.wide_context array for context option', () => {
+      const month = faker.date.month({ context: true });
+      expect(faker.definitions.date.month.wide_context).toContain(month);
+    });
+
+    it('returns random value from date.month.abbr array for abbr option', () => {
+      const month = faker.date.month({ abbr: true });
+      expect(faker.definitions.date.month.abbr).toContain(month);
+    });
+
+    it('returns random value from date.month.abbr_context array for abbr and context option', () => {
+      const month = faker.date.month({ abbr: true, context: true });
+      expect(faker.definitions.date.month.abbr_context).toContain(month);
+    });
+
+    it('returns random value from date.month.wide array for context option when date.month.wide_context array is missing', () => {
+      const backup_wide_context = faker.definitions.date.month.wide_context;
+      faker.definitions.date.month.wide_context = undefined;
+
+      const month = faker.date.month({ context: true });
+      expect(faker.definitions.date.month.wide).toContain(month);
+
+      faker.definitions.date.month.wide_context = backup_wide_context;
+    });
+
+    it('returns random value from date.month.abbr array for abbr and context option when date.month.abbr_context array is missing', () => {
+      const backup_abbr_context = faker.definitions.date.month.abbr_context;
+      faker.definitions.date.month.abbr_context = undefined;
+
+      const month = faker.date.month({ abbr: true, context: true });
+      expect(faker.definitions.date.month.abbr).toContain(month);
+
+      faker.definitions.date.month.abbr_context = backup_abbr_context;
+    });
+  });
+
+  describe('weekday()', () => {
+    it('returns random value from date.weekday.wide array by default', () => {
+      const weekday = faker.date.weekday();
+      expect(faker.definitions.date.weekday.wide).toContain(weekday);
+    });
+
+    it('returns random value from date.weekday.wide_context array for context option', () => {
+      const weekday = faker.date.weekday({ context: true });
+      expect(faker.definitions.date.weekday.wide_context).toContain(weekday);
+    });
+
+    it('returns random value from date.weekday.abbr array for abbr option', () => {
+      const weekday = faker.date.weekday({ abbr: true });
+      expect(faker.definitions.date.weekday.abbr).toContain(weekday);
+    });
+
+    it('returns random value from date.weekday.abbr_context array for abbr and context option', () => {
+      const weekday = faker.date.weekday({ abbr: true, context: true });
+      expect(faker.definitions.date.weekday.abbr_context).toContain(weekday);
+    });
+
+    it('returns random value from date.weekday.wide array for context option when date.weekday.wide_context array is missing', () => {
+      const backup_wide_context = faker.definitions.date.weekday.wide_context;
+      faker.definitions.date.weekday.wide_context = undefined;
+
+      const weekday = faker.date.weekday({ context: true });
+      expect(faker.definitions.date.weekday.wide).toContain(weekday);
+
+      faker.definitions.date.weekday.wide_context = backup_wide_context;
+    });
+
+    it('returns random value from date.weekday.abbr array for abbr and context option when date.weekday.abbr_context array is missing', () => {
+      const backup_abbr_context = faker.definitions.date.weekday.abbr_context;
+      faker.definitions.date.weekday.abbr_context = undefined;
+
+      const weekday = faker.date.weekday({ abbr: true, context: true });
+      expect(faker.definitions.date.weekday.abbr).toContain(weekday);
+
+      faker.definitions.date.weekday.abbr_context = backup_abbr_context;
+    });
+  });
+});
diff --git a/test/date.unit.js b/test/date.unit.js
deleted file mode 100644
index 88bbcac3..00000000
--- a/test/date.unit.js
+++ /dev/null
@@ -1,219 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('date.js', function () {
-  describe('past()', function () {
-    it('returns a date N years into the past', function () {
-      var date = faker.date.past(75);
-      assert.ok(date < new Date());
-    });
-
-    it('returns a past date when N = 0', function () {
-      var refDate = new Date();
-      var date = faker.date.past(0, refDate.toJSON());
-
-      assert.ok(date < refDate); // date should be before the date given
-    });
-
-    it('returns a date N years before the date given', function () {
-      var refDate = new Date(2120, 11, 9, 10, 0, 0, 0); // set the date beyond the usual calculation (to make sure this is working correctly)
-
-      var date = faker.date.past(75, refDate.toJSON());
-
-      assert.ok(date < refDate && date > new Date()); // date should be before date given but after the current time
-    });
-  });
-
-  describe('future()', function () {
-    it('returns a date N years into the future', function () {
-      var date = faker.date.future(75);
-
-      assert.ok(date > new Date());
-    });
-
-    it('returns a future date when N = 0', function () {
-      var refDate = new Date();
-      var date = faker.date.future(0, refDate.toJSON());
-
-      assert.ok(date > refDate); // date should be after the date given
-    });
-
-    it('returns a date N years after the date given', function () {
-      var refDate = new Date(1880, 11, 9, 10, 0, 0, 0); // set the date beyond the usual calculation (to make sure this is working correctly)
-
-      var date = faker.date.future(75, refDate.toJSON());
-
-      assert.ok(date > refDate && date < new Date()); // date should be after the date given, but before the current time
-    });
-  });
-
-  describe('recent()', function () {
-    it('returns a date N days from the recent past', function () {
-      var date = faker.date.recent(30);
-
-      assert.ok(date <= new Date());
-    });
-
-    it('returns a date N days from the recent past, starting from refDate', function () {
-      var days = 30;
-      var refDate = new Date(2120, 11, 9, 10, 0, 0, 0); // set the date beyond the usual calculation (to make sure this is working correctly)
-
-      var date = faker.date.recent(days, refDate);
-
-      var lowerBound = new Date(refDate.getTime() - days * 24 * 60 * 60 * 1000);
-
-      assert.ok(
-        lowerBound <= date,
-        '`recent()` date should not be further back than `n` days ago'
-      );
-      assert.ok(
-        date <= refDate,
-        '`recent()` date should not be ahead of the starting date reference'
-      );
-    });
-  });
-
-  describe('soon()', function () {
-    it('returns a date N days into the future', function () {
-      var date = faker.date.soon(30);
-
-      assert.ok(date >= new Date());
-    });
-
-    it('returns a date N days from the recent future, starting from refDate', function () {
-      var days = 30;
-      var refDate = new Date(1880, 11, 9, 10, 0, 0, 0); // set the date beyond the usual calculation (to make sure this is working correctly)
-
-      var date = faker.date.soon(days, refDate);
-
-      var upperBound = new Date(refDate.getTime() + days * 24 * 60 * 60 * 1000);
-
-      assert.ok(
-        date <= upperBound,
-        '`soon()` date should not be further ahead than `n` days ago'
-      );
-      assert.ok(
-        refDate <= date,
-        '`soon()` date should not be behind the starting date reference'
-      );
-    });
-  });
-
-  describe('between()', function () {
-    it('returns a random date between the dates given', function () {
-      var from = new Date(1990, 5, 7, 9, 11, 0, 0);
-      var to = new Date(2000, 6, 8, 10, 12, 0, 0);
-
-      var date = faker.date.between(from, to);
-
-      assert.ok(date > from && date < to);
-    });
-  });
-
-  describe('betweens()', function () {
-    it('returns an array of 3 dates ( by default ) of sorted randoms dates between the dates given', function () {
-      var from = new Date(1990, 5, 7, 9, 11, 0, 0);
-      var to = new Date(2000, 6, 8, 10, 12, 0, 0);
-
-      var dates = faker.date.betweens(from, to);
-
-      assert.ok(dates[0] > from && dates[0] < to);
-      assert.ok(dates[1] > dates[0] && dates[2] > dates[1]);
-    });
-  });
-
-  describe('month()', function () {
-    it('returns random value from date.month.wide array by default', function () {
-      var month = faker.date.month();
-      assert.ok(faker.definitions.date.month.wide.indexOf(month) !== -1);
-    });
-
-    it('returns random value from date.month.wide_context array for context option', function () {
-      var month = faker.date.month({ context: true });
-      assert.ok(
-        faker.definitions.date.month.wide_context.indexOf(month) !== -1
-      );
-    });
-
-    it('returns random value from date.month.abbr array for abbr option', function () {
-      var month = faker.date.month({ abbr: true });
-      assert.ok(faker.definitions.date.month.abbr.indexOf(month) !== -1);
-    });
-
-    it('returns random value from date.month.abbr_context array for abbr and context option', function () {
-      var month = faker.date.month({ abbr: true, context: true });
-      assert.ok(
-        faker.definitions.date.month.abbr_context.indexOf(month) !== -1
-      );
-    });
-
-    it('returns random value from date.month.wide array for context option when date.month.wide_context array is missing', function () {
-      var backup_wide_context = faker.definitions.date.month.wide_context;
-      faker.definitions.date.month.wide_context = undefined;
-
-      var month = faker.date.month({ context: true });
-      assert.ok(faker.definitions.date.month.wide.indexOf(month) !== -1);
-
-      faker.definitions.date.month.wide_context = backup_wide_context;
-    });
-
-    it('returns random value from date.month.abbr array for abbr and context option when date.month.abbr_context array is missing', function () {
-      var backup_abbr_context = faker.definitions.date.month.abbr_context;
-      faker.definitions.date.month.abbr_context = undefined;
-
-      var month = faker.date.month({ abbr: true, context: true });
-      assert.ok(faker.definitions.date.month.abbr.indexOf(month) !== -1);
-
-      faker.definitions.date.month.abbr_context = backup_abbr_context;
-    });
-  });
-
-  describe('weekday()', function () {
-    it('returns random value from date.weekday.wide array by default', function () {
-      var weekday = faker.date.weekday();
-      assert.ok(faker.definitions.date.weekday.wide.indexOf(weekday) !== -1);
-    });
-
-    it('returns random value from date.weekday.wide_context array for context option', function () {
-      var weekday = faker.date.weekday({ context: true });
-      assert.ok(
-        faker.definitions.date.weekday.wide_context.indexOf(weekday) !== -1
-      );
-    });
-
-    it('returns random value from date.weekday.abbr array for abbr option', function () {
-      var weekday = faker.date.weekday({ abbr: true });
-      assert.ok(faker.definitions.date.weekday.abbr.indexOf(weekday) !== -1);
-    });
-
-    it('returns random value from date.weekday.abbr_context array for abbr and context option', function () {
-      var weekday = faker.date.weekday({ abbr: true, context: true });
-      assert.ok(
-        faker.definitions.date.weekday.abbr_context.indexOf(weekday) !== -1
-      );
-    });
-
-    it('returns random value from date.weekday.wide array for context option when date.weekday.wide_context array is missing', function () {
-      var backup_wide_context = faker.definitions.date.weekday.wide_context;
-      faker.definitions.date.weekday.wide_context = undefined;
-
-      var weekday = faker.date.weekday({ context: true });
-      assert.ok(faker.definitions.date.weekday.wide.indexOf(weekday) !== -1);
-
-      faker.definitions.date.weekday.wide_context = backup_wide_context;
-    });
-
-    it('returns random value from date.weekday.abbr array for abbr and context option when date.weekday.abbr_context array is missing', function () {
-      var backup_abbr_context = faker.definitions.date.weekday.abbr_context;
-      faker.definitions.date.weekday.abbr_context = undefined;
-
-      var weekday = faker.date.weekday({ abbr: true, context: true });
-      assert.ok(faker.definitions.date.weekday.abbr.indexOf(weekday) !== -1);
-
-      faker.definitions.date.weekday.abbr_context = backup_abbr_context;
-    });
-  });
-});
diff --git a/test/fake.spec.ts b/test/fake.spec.ts
new file mode 100644
index 00000000..6e04a3a1
--- /dev/null
+++ b/test/fake.spec.ts
@@ -0,0 +1,50 @@
+import { describe, expect, it } from 'vitest';
+import { faker } from '../lib';
+
+describe('fake', () => {
+  describe('fake()', () => {
+    it('replaces a token with a random value for a method with no parameters', () => {
+      const name = faker.fake('{{phone.phoneNumber}}');
+      expect(name).match(/\d/);
+    });
+
+    it('replaces multiple tokens with random values for methods with no parameters', () => {
+      const name = faker.fake(
+        '{{helpers.randomize}}{{helpers.randomize}}{{helpers.randomize}}'
+      );
+      expect(name).match(/[abc]{3}/);
+    });
+
+    it('replaces a token with a random value for a methods with a simple parameter', () => {
+      const random = faker.fake('{{helpers.slugify("Will This Work")}}');
+      expect(random).toBe('Will-This-Work');
+    });
+
+    it('replaces a token with a random value for a method with an array parameter', () => {
+      const arr = ['one', 'two', 'three'];
+      const random = faker.fake(
+        '{{helpers.randomize(["one", "two", "three"])}}'
+      );
+      expect(arr).toContain(random);
+    });
+
+    it('does not allow undefined parameters', () => {
+      expect(() =>
+        // @ts-expect-error
+        faker.fake()
+      ).toThrowError(Error('string parameter is required!'));
+    });
+
+    it('does not allow invalid module name', () => {
+      expect(() => faker.fake('{{foo.bar}}')).toThrowError(
+        Error('Invalid module: foo')
+      );
+    });
+
+    it('does not allow invalid method name', () => {
+      expect(() => faker.fake('{{address.foo}}')).toThrowError(
+        Error('Invalid method: address.foo')
+      );
+    });
+  });
+});
diff --git a/test/fake.unit.js b/test/fake.unit.js
deleted file mode 100644
index 75741e61..00000000
--- a/test/fake.unit.js
+++ /dev/null
@@ -1,51 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('fake.js', function () {
-  describe('fake()', function () {
-    it('replaces a token with a random value for a method with no parameters', function () {
-      var name = faker.fake('{{phone.phoneNumber}}');
-      assert.ok(name.match(/\d/));
-    });
-
-    it('replaces multiple tokens with random values for methods with no parameters', function () {
-      var name = faker.fake(
-        '{{helpers.randomize}}{{helpers.randomize}}{{helpers.randomize}}'
-      );
-      assert.ok(name.match(/[abc]{3}/));
-    });
-
-    it('replaces a token with a random value for a methods with a simple parameter', function () {
-      var arr = ['one', 'two', 'three'];
-      var random = faker.fake('{{helpers.slugify("Will This Work")}}');
-      assert.ok(random === 'Will-This-Work');
-    });
-
-    it('replaces a token with a random value for a method with an array parameter', function () {
-      var arr = ['one', 'two', 'three'];
-      var random = faker.fake('{{helpers.randomize(["one", "two", "three"])}}');
-      assert.ok(arr.indexOf(random) > -1);
-    });
-
-    it('does not allow undefined parameters', function () {
-      assert.throws(function () {
-        faker.fake();
-      }, Error);
-    });
-
-    it('does not allow invalid module name', function () {
-      assert.throws(function () {
-        faker.fake('{{foo.bar}}');
-      }, Error);
-    });
-
-    it('does not allow invalid method name', function () {
-      assert.throws(function () {
-        faker.fake('{{address.foo}}');
-      }, Error);
-    });
-  });
-});
diff --git a/test/finance.spec.ts b/test/finance.spec.ts
new file mode 100644
index 00000000..fb6b7f87
--- /dev/null
+++ b/test/finance.spec.ts
@@ -0,0 +1,462 @@
+import type { JestMockCompat } from 'vitest';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+import { luhnCheck } from './support/luhnCheck';
+
+faker.seed(1234);
+
+describe('finance', () => {
+  describe('account( length )', () => {
+    it('should supply a default length if no length is passed', () => {
+      const account = faker.finance.account();
+
+      const expected = 8;
+      const actual = account.length;
+
+      expect(
+        actual,
+        'The expected default account length is ' +
+          expected +
+          ' but it was ' +
+          actual
+      ).toBe(expected);
+    });
+
+    it('should supply a length if a length is passed', () => {
+      const expected = 9;
+
+      const account = faker.finance.account(expected);
+
+      const actual = account.length;
+
+      expect(
+        actual,
+        'The expected default account length is ' +
+          expected +
+          ' but it was ' +
+          actual
+      ).toBe(expected);
+    });
+
+    it('should supply a default length if a zero is passed', () => {
+      const expected = 8;
+
+      const account = faker.finance.account(0);
+
+      const actual = account.length;
+
+      expect(
+        actual,
+        'The expected default account length is ' +
+          expected +
+          ' but it was ' +
+          actual
+      ).toBe(expected);
+    });
+  });
+
+  describe('accountName()', () => {
+    it('should return an account name', () => {
+      const actual = faker.finance.accountName();
+
+      expect(actual).toBeTruthy();
+    });
+  });
+
+  describe('routingNumber()', () => {
+    it('should return a routing number', () => {
+      const actual = faker.finance.routingNumber();
+
+      expect(actual).toBeTruthy();
+    });
+  });
+
+  describe('mask( length, parens, ellipsis )', () => {
+    it('should set a default length', () => {
+      const expected = 4; //default account mask length
+
+      const mask = faker.finance.mask(null, false, false);
+
+      const actual = mask.length;
+
+      expect(
+        actual,
+        'The expected default mask length is ' +
+          expected +
+          ' but it was ' +
+          actual
+      ).toBe(expected);
+    });
+
+    it('should set a specified length', () => {
+      let expected = faker.datatype.number(20);
+
+      expected =
+        expected === 0 || !expected || typeof expected == 'undefined'
+          ? 4
+          : expected;
+
+      const mask = faker.finance.mask(expected, false, false);
+
+      const actual = mask.length; //picks 4 if the random number generator picks 0
+
+      expect(
+        actual,
+        'The expected default mask length is ' +
+          expected +
+          ' but it was ' +
+          actual
+      ).toBe(expected);
+    });
+
+    it('should set a default length of 4 for a zero value', () => {
+      const expected = 4;
+
+      faker.finance.mask(0, false, false);
+
+      const actual = 4; //picks 4 if the random number generator picks 0
+
+      expect(
+        actual,
+        'The expected default mask length is ' +
+          expected +
+          ' but it was ' +
+          actual
+      ).toBe(expected);
+    });
+
+    it('should by default include parentheses around a partial account number', () => {
+      const expected = true;
+
+      const mask = faker.finance.mask(null, null, false);
+
+      const regexp = new RegExp(/(\(\d{4}?\))/);
+      const actual = regexp.test(mask);
+
+      expect(
+        actual,
+        'The expected match for parentheses is ' +
+          expected +
+          ' but it was ' +
+          actual
+      ).toBe(expected);
+    });
+
+    it('should by default include an ellipsis', () => {
+      const expected = true;
+
+      const mask = faker.finance.mask(null, false, null);
+
+      const regexp = new RegExp(/(\.\.\.\d{4})/);
+      const actual = regexp.test(mask);
+
+      expect(
+        actual,
+        'The expected match for parentheses is ' +
+          expected +
+          ' but it was ' +
+          actual
+      ).toBe(expected);
+    });
+
+    it('should work when random variables are passed into the arguments', () => {
+      const length = faker.datatype.number(20);
+      const ellipsis = length % 2 === 0 ? true : false;
+      const parens = !ellipsis;
+
+      const mask = faker.finance.mask(length, ellipsis, parens);
+      expect(mask).toBeTruthy();
+    });
+  });
+
+  describe('amount(min, max, dec, symbol)', () => {
+    it('should use the default amounts when not passing arguments', () => {
+      const amount = faker.finance.amount();
+
+      expect(amount).toBeTruthy();
+      expect(+amount, 'the amount should be greater than 0').greaterThan(0);
+      expect(+amount, 'the amount should be less than 1001').lessThan(1001);
+    });
+
+    it('should use the default decimal location when not passing arguments', () => {
+      let amount = faker.finance.amount();
+
+      amount = faker.finance.amount(100, 100, 1);
+
+      expect(amount).toBeTruthy();
+      expect(amount, 'the amount should be equal 100.0').toStrictEqual('100.0');
+    });
+
+    //TODO: add support for more currency and decimal options
+    it('should not include a currency symbol by default', () => {
+      const amount = faker.finance.amount();
+
+      expect(
+        amount,
+        'The expected match should not include a currency symbol'
+      ).match(/[0-9.]/);
+    });
+
+    it('it should handle negative amounts', () => {
+      const amount = faker.finance.amount(-200, -1);
+
+      expect(amount).toBeTruthy();
+      expect(+amount, 'the amount should be less than 0').lessThan(0);
+      expect(+amount, 'the amount should be greater than -201').greaterThan(
+        -201
+      );
+    });
+
+    it('it should handle argument dec', () => {
+      const amount = faker.finance.amount(100, 100, 1);
+
+      expect(amount).toBeTruthy();
+      expect(amount, 'the amount should be equal 100.0').toStrictEqual('100.0');
+    });
+
+    it('it should handle argument dec = 0', () => {
+      const amount = faker.finance.amount(100, 100, 0);
+
+      expect(amount).toBeTruthy();
+      expect(amount, 'the amount should be equal 100').toStrictEqual('100');
+    });
+
+    it('it should return a string', () => {
+      const amount = faker.finance.amount(100, 100, 0);
+
+      expect(amount).toBeTruthy();
+      expect(typeof amount, 'the amount type should be string').toBe('string');
+    });
+
+    [false, undefined].forEach((autoFormat) => {
+      it(`should return unformatted if autoformat is ${autoFormat}`, () => {
+        const number = 6000;
+        const amount = faker.finance.amount(
+          number,
+          number,
+          0,
+          undefined,
+          autoFormat
+        );
+
+        expect(amount).toStrictEqual(number.toString());
+      });
+    });
+
+    it('should return the number formatted on the current locale', () => {
+      const number = 6000;
+      const decimalPlaces = 2;
+      const expected = number.toLocaleString(undefined, {
+        minimumFractionDigits: decimalPlaces,
+      });
+
+      const amount = faker.finance.amount(
+        number,
+        number,
+        decimalPlaces,
+        undefined,
+        true
+      );
+
+      expect(amount).toStrictEqual(expected);
+    });
+  });
+
+  describe('transactionType()', () => {
+    it('should return a random transaction type', () => {
+      const transactionType = faker.finance.transactionType();
+
+      expect(transactionType).toBeTruthy();
+    });
+  });
+
+  describe('currencyCode()', () => {
+    it('returns a random currency code with a format', () => {
+      const currencyCode = faker.finance.currencyCode();
+
+      expect(currencyCode).match(/^[A-Z]{3}$/);
+    });
+  });
+
+  describe('bitcoinAddress()', () => {
+    it('returns a random bitcoin address', () => {
+      const bitcoinAddress = faker.finance.bitcoinAddress();
+
+      /**
+       *  Note: Although the total length of a Bitcoin address can be 25-33 characters, regex quantifiers only check the preceding token
+       *  Therefore we take one from the total length of the address not including the first character ([13])
+       */
+
+      expect(bitcoinAddress).match(/^[13][a-km-zA-HJ-NP-Z1-9]{24,33}$/);
+    });
+  });
+
+  describe('litecoinAddress()', () => {
+    it('returns a random litecoin address', () => {
+      const litecoinAddress = faker.finance.litecoinAddress();
+
+      expect(litecoinAddress).match(/^[LM3][1-9a-km-zA-HJ-NP-Z]{25,32}$/);
+    });
+  });
+
+  describe('ethereumAddress()', () => {
+    it('returns a random ethereum address', () => {
+      const ethereumAddress = faker.finance.ethereumAddress();
+      expect(ethereumAddress).match(/^(0x)[0-9a-f]{40}$/);
+    });
+  });
+
+  describe('creditCardNumber()', () => {
+    it('returns a random credit card number', () => {
+      let number = faker.finance.creditCardNumber();
+      number = number.replace(/\D/g, ''); // remove formating
+      console.log('version:', process.version, number, number.length);
+      expect(number.length).greaterThanOrEqual(13);
+      expect(number.length).lessThanOrEqual(20);
+      expect(number).match(/^[0-9]{13,20}$/);
+      expect(luhnCheck(number)).toBeTruthy();
+    });
+
+    it('returns a valid credit card number', () => {
+      expect(luhnCheck(faker.finance.creditCardNumber(''))).toBeTruthy();
+      expect(luhnCheck(faker.finance.creditCardNumber())).toBeTruthy();
+      expect(luhnCheck(faker.finance.creditCardNumber())).toBeTruthy();
+      expect(luhnCheck(faker.finance.creditCardNumber('visa'))).toBeTruthy();
+      expect(
+        luhnCheck(faker.finance.creditCardNumber('mastercard'))
+      ).toBeTruthy();
+      expect(
+        luhnCheck(faker.finance.creditCardNumber('discover'))
+      ).toBeTruthy();
+      expect(luhnCheck(faker.finance.creditCardNumber())).toBeTruthy();
+      expect(luhnCheck(faker.finance.creditCardNumber())).toBeTruthy();
+    });
+    it('returns a correct credit card number when issuer provided', () => {
+      //TODO: implement checks for each format with regexp
+      const visa = faker.finance.creditCardNumber('visa');
+      expect(visa).match(/^4(([0-9]){12}|([0-9]){3}(\-([0-9]){4}){3})$/);
+      expect(luhnCheck(visa)).toBeTruthy();
+
+      const mastercard = faker.finance.creditCardNumber('mastercard');
+      expect(mastercard).match(/^(5[1-5]\d{2}|6771)(\-\d{4}){3}$/);
+      expect(luhnCheck(mastercard)).toBeTruthy();
+
+      const discover = faker.finance.creditCardNumber('discover');
+
+      expect(luhnCheck(discover)).toBeTruthy();
+
+      const american_express =
+        faker.finance.creditCardNumber('american_express');
+      expect(luhnCheck(american_express)).toBeTruthy();
+      const diners_club = faker.finance.creditCardNumber('diners_club');
+      expect(luhnCheck(diners_club)).toBeTruthy();
+      const jcb = faker.finance.creditCardNumber('jcb');
+      expect(luhnCheck(jcb)).toBeTruthy();
+      const switchC = faker.finance.creditCardNumber('mastercard');
+      expect(luhnCheck(switchC)).toBeTruthy();
+      const solo = faker.finance.creditCardNumber('solo');
+      expect(luhnCheck(solo)).toBeTruthy();
+      const maestro = faker.finance.creditCardNumber('maestro');
+      expect(luhnCheck(maestro)).toBeTruthy();
+      const laser = faker.finance.creditCardNumber('laser');
+      expect(luhnCheck(laser)).toBeTruthy();
+      const instapayment = faker.finance.creditCardNumber('instapayment');
+      expect(luhnCheck(instapayment)).toBeTruthy();
+    });
+    it('returns custom formated strings', () => {
+      let number = faker.finance.creditCardNumber('###-###-##L');
+      expect(number).match(/^\d{3}\-\d{3}\-\d{3}$/);
+      expect(luhnCheck(number)).toBeTruthy();
+
+      number = faker.finance.creditCardNumber('234[5-9]#{999}L');
+      expect(number).match(/^234[5-9]\d{1000}$/);
+      expect(luhnCheck(number)).toBeTruthy();
+    });
+  });
+
+  describe('creditCardCVV()', () => {
+    it('returns a random credit card CVV', () => {
+      const cvv = faker.finance.creditCardCVV();
+      expect(cvv).toHaveLength(3);
+      expect(cvv).match(/^[0-9]{3}$/);
+    });
+  });
+
+  describe('iban()', () => {
+    const ibanLib = require('../lib/iban').default;
+    it('returns a random yet formally correct IBAN number', () => {
+      const iban =
+        // @ts-expect-error
+        faker.finance.iban();
+      const bban = iban.substring(4) + iban.substring(0, 4);
+
+      expect(
+        ibanLib.mod97(ibanLib.toDigitString(bban)),
+        'the result should be equal to 1'
+      ).toStrictEqual(1);
+    });
+    it('returns a specific and formally correct IBAN number', () => {
+      const iban = faker.finance.iban(false, 'DE');
+      const bban = iban.substring(4) + iban.substring(0, 4);
+      const countryCode = iban.substring(0, 2);
+
+      expect(countryCode).toBe('DE');
+      expect(
+        ibanLib.mod97(ibanLib.toDigitString(bban)),
+        'the result should be equal to 1'
+      ).toStrictEqual(1);
+    });
+    it('throws an error if the passed country code is not supported', () => {
+      expect(() => faker.finance.iban(false, 'AA')).toThrowError(
+        Error('Country code AA not supported.')
+      );
+    });
+  });
+
+  describe('bic()', () => {
+    const ibanLib = require('../lib/iban').default;
+    it('returns a random yet formally correct BIC number', () => {
+      const bic = faker.finance.bic();
+      const expr = new RegExp(
+        '^[A-Z]{4}(' +
+          ibanLib.iso3166.join('|') +
+          ')[A-Z2-9][A-NP-Z0-9]([A-Z0-9]{3})?$',
+        'i'
+      );
+
+      expect(bic).match(expr);
+    });
+  });
+
+  describe('transactionDescription()', () => {
+    let spy_helpers_createTransaction: JestMockCompat<
+      [],
+      {
+        amount: string;
+        date: Date;
+        business: string;
+        name: string;
+        type: string;
+        account: string;
+      }
+    >;
+
+    beforeEach(() => {
+      spy_helpers_createTransaction = vi.spyOn(
+        faker.helpers,
+        'createTransaction'
+      );
+    });
+
+    afterEach(() => {
+      spy_helpers_createTransaction.mockRestore();
+    });
+
+    it('returns a random transaction description', () => {
+      const transactionDescription = faker.finance.transactionDescription();
+
+      expect(transactionDescription).toBeTruthy();
+      expect(spy_helpers_createTransaction).toHaveBeenCalledOnce();
+    });
+  });
+});
diff --git a/test/finance.unit.js b/test/finance.unit.js
deleted file mode 100644
index fc5fd2d1..00000000
--- a/test/finance.unit.js
+++ /dev/null
@@ -1,482 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-faker.seed(1234);
-
-describe('finance.js', function () {
-  describe('account( length )', function () {
-    it('should supply a default length if no length is passed', function () {
-      var account = faker.finance.account();
-
-      var expected = 8;
-      var actual = account.length;
-
-      assert.strictEqual(
-        actual,
-        expected,
-        'The expected default account length is ' +
-          expected +
-          ' but it was ' +
-          actual
-      );
-    });
-
-    it('should supply a length if a length is passed', function () {
-      var expected = 9;
-
-      var account = faker.finance.account(expected);
-
-      var actual = account.length;
-
-      assert.strictEqual(
-        actual,
-        expected,
-        'The expected default account length is ' +
-          expected +
-          ' but it was ' +
-          actual
-      );
-    });
-
-    it('should supply a default length if a zero is passed', function () {
-      var expected = 8;
-
-      var account = faker.finance.account(0);
-
-      var actual = account.length;
-
-      assert.strictEqual(
-        actual,
-        expected,
-        'The expected default account length is ' +
-          expected +
-          ' but it was ' +
-          actual
-      );
-    });
-  });
-
-  describe('accountName()', function () {
-    it('should return an account name', function () {
-      var actual = faker.finance.accountName();
-
-      assert.ok(actual);
-    });
-  });
-
-  describe('routingNumber()', function () {
-    it('should return a routing number', function () {
-      var actual = faker.finance.routingNumber();
-
-      assert.ok(actual);
-    });
-  });
-
-  describe('mask( length, parens, ellipsis )', function () {
-    it('should set a default length', function () {
-      var expected = 4; //default account mask length
-
-      var mask = faker.finance.mask(null, false, false);
-
-      var actual = mask.length;
-
-      assert.strictEqual(
-        actual,
-        expected,
-        'The expected default mask length is ' +
-          expected +
-          ' but it was ' +
-          actual
-      );
-    });
-
-    it('should set a specified length', function () {
-      var expected = faker.datatype.number(20);
-
-      expected =
-        expected == 0 || !expected || typeof expected == 'undefined'
-          ? 4
-          : expected;
-
-      var mask = faker.finance.mask(expected, false, false);
-
-      var actual = mask.length; //picks 4 if the random number generator picks 0
-
-      assert.strictEqual(
-        actual,
-        expected,
-        'The expected default mask length is ' +
-          expected +
-          ' but it was ' +
-          actual
-      );
-    });
-
-    it('should set a default length of 4 for a zero value', function () {
-      var expected = 4;
-
-      faker.finance.mask(0, false, false);
-
-      var actual = 4; //picks 4 if the random number generator picks 0
-
-      assert.strictEqual(
-        actual,
-        expected,
-        'The expected default mask length is ' +
-          expected +
-          ' but it was ' +
-          actual
-      );
-    });
-
-    it('should by default include parentheses around a partial account number', function () {
-      var expected = true;
-
-      var mask = faker.finance.mask(null, null, false);
-
-      var regexp = new RegExp(/(\(\d{4}?\))/);
-      var actual = regexp.test(mask);
-
-      assert.strictEqual(
-        actual,
-        expected,
-        'The expected match for parentheses is ' +
-          expected +
-          ' but it was ' +
-          actual
-      );
-    });
-
-    it('should by default include an ellipsis', function () {
-      var expected = true;
-
-      var mask = faker.finance.mask(null, false, null);
-
-      var regexp = new RegExp(/(\.\.\.\d{4})/);
-      var actual = regexp.test(mask);
-
-      assert.strictEqual(
-        actual,
-        expected,
-        'The expected match for parentheses is ' +
-          expected +
-          ' but it was ' +
-          actual
-      );
-    });
-
-    it('should work when random variables are passed into the arguments', function () {
-      var length = faker.datatype.number(20);
-      var ellipsis = length % 2 === 0 ? true : false;
-      var parens = !ellipsis;
-
-      var mask = faker.finance.mask(length, ellipsis, parens);
-      assert.ok(mask);
-    });
-  });
-
-  describe('amount(min, max, dec, symbol)', function () {
-    it('should use the default amounts when not passing arguments', function () {
-      var amount = faker.finance.amount();
-
-      assert.ok(amount);
-      assert.strictEqual(
-        amount > 0,
-        true,
-        'the amount should be greater than 0'
-      );
-      assert.strictEqual(
-        amount < 1001,
-        true,
-        'the amount should be greater than 0'
-      );
-    });
-
-    it('should use the default decimal location when not passing arguments', function () {
-      var amount = faker.finance.amount();
-
-      var decimal = '.';
-      var expected = amount.length - 3;
-      var amount = faker.finance.amount(100, 100, 1);
-
-      assert.ok(amount);
-      assert.strictEqual(amount, '100.0', 'the amount should be equal 100.0');
-    });
-
-    //TODO: add support for more currency and decimal options
-    it('should not include a currency symbol by default', function () {
-      var amount = faker.finance.amount();
-
-      var regexp = new RegExp(/[0-9.]/);
-
-      var expected = true;
-      var actual = regexp.test(amount);
-
-      assert.strictEqual(
-        actual,
-        expected,
-        'The expected match should not include a currency symbol'
-      );
-    });
-
-    it('it should handle negative amounts', function () {
-      var amount = faker.finance.amount(-200, -1);
-
-      assert.ok(amount);
-      assert.strictEqual(
-        amount < 0,
-        true,
-        'the amount should be greater than 0'
-      );
-      assert.strictEqual(
-        amount > -201,
-        true,
-        'the amount should be greater than 0'
-      );
-    });
-
-    it('it should handle argument dec', function () {
-      var amount = faker.finance.amount(100, 100, 1);
-
-      assert.ok(amount);
-      assert.strictEqual(amount, '100.0', 'the amount should be equal 100.0');
-    });
-
-    it('it should handle argument dec = 0', function () {
-      var amount = faker.finance.amount(100, 100, 0);
-
-      assert.ok(amount);
-      assert.strictEqual(amount, '100', 'the amount should be equal 100');
-    });
-
-    it('it should return a string', function () {
-      var amount = faker.finance.amount(100, 100, 0);
-
-      var typeOfAmount = typeof amount;
-
-      assert.ok(amount);
-      assert.strictEqual(
-        typeOfAmount,
-        'string',
-        'the amount type should be number'
-      );
-    });
-
-    [false, undefined].forEach(function (autoFormat) {
-      it(`should return unformatted if autoformat is ${autoFormat}`, function () {
-        const number = 6000;
-        const amount = faker.finance.amount(
-          number,
-          number,
-          0,
-          undefined,
-          autoFormat
-        );
-
-        assert.strictEqual(amount, number.toString());
-      });
-    });
-
-    // TODO @Shinigami92 2022-01-18: See https://github.com/faker-js/faker/pull/179
-    if (require('os').platform() !== 'win32') {
-      it('should return the number formatted on the current locale', function () {
-        const number = 6000,
-          decimalPlaces = 2;
-        const expected = number.toLocaleString(undefined, {
-          minimumFractionDigits: decimalPlaces,
-        });
-
-        const amount = faker.finance.amount(
-          number,
-          number,
-          decimalPlaces,
-          undefined,
-          true
-        );
-
-        assert.strictEqual(amount, expected);
-      });
-    }
-  });
-
-  describe('transactionType()', function () {
-    it('should return a random transaction type', function () {
-      var transactionType = faker.finance.transactionType();
-
-      assert.ok(transactionType);
-    });
-  });
-
-  describe('currencyCode()', function () {
-    it('returns a random currency code with a format', function () {
-      var currencyCode = faker.finance.currencyCode();
-
-      assert.ok(currencyCode.match(/^[A-Z]{3}$/));
-    });
-  });
-
-  describe('bitcoinAddress()', function () {
-    it('returns a random bitcoin address', function () {
-      var bitcoinAddress = faker.finance.bitcoinAddress();
-
-      /**
-       *  Note: Although the total length of a Bitcoin address can be 25-33 characters, regex quantifiers only check the preceding token
-       *  Therefore we take one from the total length of the address not including the first character ([13])
-       */
-
-      assert.ok(bitcoinAddress.match(/^[13][a-km-zA-HJ-NP-Z1-9]{24,33}$/));
-    });
-  });
-
-  describe('litecoinAddress()', function () {
-    it('returns a random litecoin address', function () {
-      var litecoinAddress = faker.finance.litecoinAddress();
-
-      assert.ok(litecoinAddress.match(/^[LM3][1-9a-km-zA-HJ-NP-Z]{25,32}$/));
-    });
-  });
-
-  describe('ethereumAddress()', function () {
-    it('returns a random ethereum address', function () {
-      var ethereumAddress = faker.finance.ethereumAddress();
-      assert.ok(ethereumAddress.match(/^(0x)[0-9a-f]{40}$/));
-    });
-  });
-
-  describe('creditCardNumber()', function () {
-    var luhnFormula = require('./support/luhnCheck.js');
-
-    it('returns a random credit card number', function () {
-      var number = faker.finance.creditCardNumber();
-      number = number.replace(/\D/g, ''); // remove formating
-      console.log('version:', process.version, number, number.length);
-      assert.ok(number.length >= 13 && number.length <= 20);
-      assert.ok(number.match(/^[0-9]{13,20}$/));
-      assert.ok(luhnFormula(number));
-    });
-
-    it('returns a valid credit card number', function () {
-      assert.ok(luhnFormula(faker.finance.creditCardNumber('')));
-      assert.ok(luhnFormula(faker.finance.creditCardNumber()));
-      assert.ok(luhnFormula(faker.finance.creditCardNumber()));
-      assert.ok(luhnFormula(faker.finance.creditCardNumber('visa')));
-      assert.ok(luhnFormula(faker.finance.creditCardNumber('mastercard')));
-      assert.ok(luhnFormula(faker.finance.creditCardNumber('discover')));
-      assert.ok(luhnFormula(faker.finance.creditCardNumber()));
-      assert.ok(luhnFormula(faker.finance.creditCardNumber()));
-    });
-    it('returns a correct credit card number when issuer provided', function () {
-      //TODO: implement checks for each format with regexp
-      var visa = faker.finance.creditCardNumber('visa');
-      assert.ok(visa.match(/^4(([0-9]){12}|([0-9]){3}(\-([0-9]){4}){3})$/));
-      assert.ok(luhnFormula(visa));
-
-      var mastercard = faker.finance.creditCardNumber('mastercard');
-      assert.ok(mastercard.match(/^(5[1-5]\d{2}|6771)(\-\d{4}){3}$/));
-      assert.ok(luhnFormula(mastercard));
-
-      var discover = faker.finance.creditCardNumber('discover');
-
-      assert.ok(luhnFormula(discover));
-
-      var american_express = faker.finance.creditCardNumber('american_express');
-      assert.ok(luhnFormula(american_express));
-      var diners_club = faker.finance.creditCardNumber('diners_club');
-      assert.ok(luhnFormula(diners_club));
-      var jcb = faker.finance.creditCardNumber('jcb');
-      assert.ok(luhnFormula(jcb));
-      var switchC = faker.finance.creditCardNumber('mastercard');
-      assert.ok(luhnFormula(switchC));
-      var solo = faker.finance.creditCardNumber('solo');
-      assert.ok(luhnFormula(solo));
-      var maestro = faker.finance.creditCardNumber('maestro');
-      assert.ok(luhnFormula(maestro));
-      var laser = faker.finance.creditCardNumber('laser');
-      assert.ok(luhnFormula(laser));
-      var instapayment = faker.finance.creditCardNumber('instapayment');
-      assert.ok(luhnFormula(instapayment));
-    });
-    it('returns custom formated strings', function () {
-      var number = faker.finance.creditCardNumber('###-###-##L');
-      assert.ok(number.match(/^\d{3}\-\d{3}\-\d{3}$/));
-      assert.ok(luhnFormula(number));
-      number = faker.finance.creditCardNumber('234[5-9]#{999}L');
-      assert.ok(number.match(/^234[5-9]\d{1000}$/));
-      assert.ok(luhnFormula(number));
-    });
-  });
-
-  describe('creditCardCVV()', function () {
-    it('returns a random credit card CVV', function () {
-      var cvv = faker.finance.creditCardCVV();
-      assert.ok(cvv.length === 3);
-      assert.ok(cvv.match(/^[0-9]{3}$/));
-    });
-  });
-
-  describe('iban()', function () {
-    var ibanLib = require('../lib/iban').default;
-    it('returns a random yet formally correct IBAN number', function () {
-      var iban = faker.finance.iban();
-      var bban = iban.substring(4) + iban.substring(0, 4);
-
-      assert.strictEqual(
-        ibanLib.mod97(ibanLib.toDigitString(bban)),
-        1,
-        'the result should be equal to 1'
-      );
-    });
-    it('returns a specific and formally correct IBAN number', function () {
-      var iban = faker.finance.iban(false, 'DE');
-      var bban = iban.substring(4) + iban.substring(0, 4);
-      var countryCode = iban.substring(0, 2);
-
-      assert.equal(countryCode, 'DE');
-      assert.equal(
-        ibanLib.mod97(ibanLib.toDigitString(bban)),
-        1,
-        'the result should be equal to 1'
-      );
-    });
-    it('throws an error if the passed country code is not supported', function () {
-      assert.throws(function () {
-        faker.finance.iban(false, 'AA');
-      }, /Country code AA not supported/);
-    });
-  });
-
-  describe('bic()', function () {
-    var ibanLib = require('../lib/iban').default;
-    it('returns a random yet formally correct BIC number', function () {
-      var bic = faker.finance.bic();
-      var expr = new RegExp(
-        '^[A-Z]{4}(' +
-          ibanLib.iso3166.join('|') +
-          ')[A-Z2-9][A-NP-Z0-9]([A-Z0-9]{3})?$',
-        'i'
-      );
-
-      assert.ok(bic.match(expr));
-    });
-  });
-
-  describe('transactionDescription()', function () {
-    beforeEach(function () {
-      sinon.spy(faker.helpers, 'createTransaction');
-    });
-
-    afterEach(function () {
-      faker.helpers.createTransaction.restore();
-    });
-
-    it('returns a random transaction description', function () {
-      var transactionDescription = faker.finance.transactionDescription();
-
-      assert.ok(transactionDescription);
-      assert.ok(faker.helpers.createTransaction.calledOnce);
-    });
-  });
-});
diff --git a/test/finance_iban.unit.js b/test/finance_iban.spec.ts
index df3141ed..0a1f9e23 100644
--- a/test/finance_iban.unit.js
+++ b/test/finance_iban.spec.ts
@@ -1,15 +1,19 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var faker = require('../lib').faker;
-}
+import { expect } from 'vitest';
+import { describe, it } from 'vitest';
+import { faker } from '../lib';
+import ibanLib from '../lib/iban';
 
 function getAnIbanByCountry(countryCode) {
-  var iban = faker.finance.iban();
-  var maxTry = 100000;
-  var countTry = maxTry;
-  while (countTry && iban.substring(0, 2) != countryCode) {
+  let iban =
+    // @ts-expect-error
+    faker.finance.iban();
+  const maxTry = 100000;
+  let countTry = maxTry;
+  while (countTry && iban.substring(0, 2) !== countryCode) {
     faker.seed(100000 - countTry);
-    iban = faker.finance.iban();
+    iban =
+      // @ts-expect-error
+      faker.finance.iban();
     countTry--;
   }
 
@@ -27,8 +31,8 @@ function getAnIbanByCountry(countryCode) {
   return iban;
 }
 
-describe('finance_iban.js', function () {
-  describe('issue_944 IBAN Georgia', function () {
+describe('finance_iban.js', () => {
+  describe('issue_944 IBAN Georgia', () => {
     // Georgia
     // https://transferwise.com/fr/iban/georgia
     // Length 22
@@ -39,54 +43,50 @@ describe('finance_iban.js', function () {
 
     // example IBAN GE29 NB00 0000 0101 9049 17
 
-    var ibanLib = require('../lib/iban').default;
-
-    it('IBAN for Georgia is correct', function () {
+    it('IBAN for Georgia is correct', () => {
       faker.seed(17);
-      var iban = getAnIbanByCountry('GE');
-      var ibanFormated = iban.match(/.{1,4}/g).join(' ');
-      var bban = iban.substring(4) + iban.substring(0, 4);
+      const iban = getAnIbanByCountry('GE');
+      const ibanFormated = iban.match(/.{1,4}/g).join(' ');
+      const bban = iban.substring(4) + iban.substring(0, 4);
 
-      assert.equal(
+      expect(
         22,
-        iban.length,
         'GE IBAN would be 22 chars length, given is ' + iban.length
-      );
+      ).toBe(iban.length);
 
-      assert.ok(
-        iban.substring(0, 2).match(/^[A-Z]{2}$/),
+      expect(
+        iban.substring(0, 2),
         iban.substring(0, 2) +
           ' must contains only characters in GE IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(2, 4).match(/^\d{2}$/),
+      ).match(/^[A-Z]{2}$/);
+      expect(
+        iban.substring(2, 4),
         iban.substring(2, 4) +
           ' must contains only digit in GE IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(4, 6).match(/^[A-Z]{2}$/),
+      ).match(/^\d{2}$/);
+      expect(
+        iban.substring(4, 6),
         iban.substring(4, 6) +
           ' must contains only characters in GE IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(6, 24).match(/^\d{16}$/),
+      ).match(/^[A-Z]{2}$/);
+      expect(
+        iban.substring(6, 24),
         iban.substring(6, 24) +
           ' must contains only characters in GE IBAN ' +
           ibanFormated
-      );
+      ).match(/^\d{16}$/);
 
-      assert.equal(
+      expect(
         ibanLib.mod97(ibanLib.toDigitString(bban)),
-        1,
         'the result should be equal to 1'
-      );
+      ).toBe(1);
     });
   });
 
-  describe('issue_945 IBAN Pakistan', function () {
+  describe('issue_945 IBAN Pakistan', () => {
     // https://transferwise.com/fr/iban/pakistan
     // Example IBAN Pakistan
     // PK36SCBL0000001123456702
@@ -99,54 +99,52 @@ describe('finance_iban.js', function () {
     // Account Code 16 digits
     // Total Length 24 chars
 
-    var ibanLib = require('../lib/iban').default;
+    const ibanLib = require('../lib/iban').default;
 
-    it('IBAN for Pakistan is correct', function () {
+    it('IBAN for Pakistan is correct', () => {
       faker.seed(28);
-      var iban = getAnIbanByCountry('PK');
-      var ibanFormated = iban.match(/.{1,4}/g).join(' ');
-      var bban = iban.substring(4) + iban.substring(0, 4);
+      const iban = getAnIbanByCountry('PK');
+      const ibanFormated = iban.match(/.{1,4}/g).join(' ');
+      const bban = iban.substring(4) + iban.substring(0, 4);
 
-      assert.equal(
+      expect(
         24,
-        iban.length,
         'PK IBAN would be 24 chars length, given is ' + iban.length
-      );
+      ).toBe(iban.length);
 
-      assert.ok(
-        iban.substring(0, 2).match(/^[A-Z]{2}$/),
+      expect(
+        iban.substring(0, 2),
         iban.substring(0, 2) +
           ' must contains only characters in PK IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(2, 4).match(/^\d{2}$/),
+      ).match(/^[A-Z]{2}$/);
+      expect(
+        iban.substring(2, 4),
         iban.substring(2, 4) +
           ' must contains only digit in PK IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(4, 8).match(/^[A-Z]{4}$/),
+      ).match(/^\d{2}$/);
+      expect(
+        iban.substring(4, 8),
         iban.substring(4, 8) +
           ' must contains only characters in PK IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(8, 24).match(/^\d{16}$/),
+      ).match(/^[A-Z]{4}$/);
+      expect(
+        iban.substring(8, 24),
         iban.substring(8, 24) +
           ' must contains only digits in PK IBAN ' +
           ibanFormated
-      );
+      ).match(/^\d{16}$/);
 
-      assert.equal(
+      expect(
         ibanLib.mod97(ibanLib.toDigitString(bban)),
-        1,
         'the result should be equal to 1'
-      );
+      ).toBe(1);
     });
   });
 
-  describe('issue_946 IBAN Turkish', function () {
+  describe('issue_946 IBAN Turkish', () => {
     // https://transferwise.com/fr/iban/turkey
     // Un IBAN en Turquie est constitué de 26 caractères :
     //
@@ -165,71 +163,69 @@ describe('finance_iban.js', function () {
     //   Chiffre d'indicatif national	0
     //   Numéro de compte bancaire	0519786457841326
 
-    var ibanLib = require('../lib/iban').default;
+    const ibanLib = require('../lib/iban').default;
 
-    it('IBAN for Turkish is correct', function () {
+    it('IBAN for Turkish is correct', () => {
       faker.seed(37);
 
-      var iban = getAnIbanByCountry('TR');
-      var ibanFormated = iban.match(/.{1,4}/g).join(' ');
-      var bban = iban.substring(4) + iban.substring(0, 4);
+      const iban = getAnIbanByCountry('TR');
+      const ibanFormated = iban.match(/.{1,4}/g).join(' ');
+      const bban = iban.substring(4) + iban.substring(0, 4);
 
-      assert.equal(
+      expect(
         26,
-        iban.length,
         'PK IBAN would be 26 chars length, given is ' + iban.length
-      );
+      ).toBe(iban.length);
 
-      assert.ok(
-        iban.substring(0, 2).match(/^[A-Z]{2}$/),
+      expect(
+        iban.substring(0, 2),
         'Country Code:' +
           iban.substring(0, 2) +
           ' must contains only characters in PK IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(2, 4).match(/^\d{2}$/),
+      ).match(/^[A-Z]{2}$/);
+      expect(
+        iban.substring(2, 4),
         'Control key:' +
           iban.substring(2, 4) +
           ' must contains only digit in PK IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(4, 9).match(/^\d{5}$/),
+      ).match(/^\d{2}$/);
+      expect(
+        iban.substring(4, 9),
         'Swift Bank Code:' +
           iban.substring(4, 9) +
           ' must contains only digits in PK IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(9, 10).match(/^\d{1}$/),
+      ).match(/^\d{5}$/);
+      expect(
+        iban.substring(9, 10),
         'National Digit:' +
           iban.substring(9, 10) +
           ' must contains only digits in PK IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(10, 26).match(/^\d{16}$/),
+      ).match(/^\d{1}$/);
+      expect(
+        iban.substring(10, 26),
         'Account Code:' +
           iban.substring(10, 26) +
           ' must contains only digits in PK IBAN ' +
           ibanFormated
-      );
+      ).match(/^\d{16}$/);
 
-      assert.ok(
-        iban.substring(2, 26).match(/^\d{24}$/),
+      expect(
+        iban.substring(2, 26),
         'No character after TR ' + ibanFormated
-      );
+      ).match(/^\d{24}$/);
 
-      assert.equal(
+      expect(
         ibanLib.mod97(ibanLib.toDigitString(bban)),
-        1,
         'the result should be equal to 1'
-      );
+      ).toBe(1);
     });
   });
 
-  describe('issue_846 IBAN Azerbaijan', function () {
+  describe('issue_846 IBAN Azerbaijan', () => {
     // Azerbaijan
     // https://transferwise.com/fr/iban/azerbaijan
     // Length 28
@@ -240,50 +236,48 @@ describe('finance_iban.js', function () {
 
     // example IBAN AZ21 NABZ 0000 0000 1370 1000 1944
 
-    var ibanLib = require('../lib/iban').default;
+    const ibanLib = require('../lib/iban').default;
 
-    it('IBAN for Azerbaijan is correct', function () {
+    it('IBAN for Azerbaijan is correct', () => {
       faker.seed(21);
-      var iban = getAnIbanByCountry('AZ');
-      var ibanFormated = iban.match(/.{1,4}/g).join(' ');
-      var bban = iban.substring(4) + iban.substring(0, 4);
+      const iban = getAnIbanByCountry('AZ');
+      const ibanFormated = iban.match(/.{1,4}/g).join(' ');
+      const bban = iban.substring(4) + iban.substring(0, 4);
 
-      assert.equal(
+      expect(
         28,
-        iban.length,
         'AZ IBAN would be 28 chars length, given is ' + iban.length
-      );
+      ).toBe(iban.length);
 
-      assert.ok(
-        iban.substring(0, 2).match(/^[A-Z]{2}$/),
+      expect(
+        iban.substring(0, 2),
         iban.substring(0, 2) +
           ' must contains only characters in AZ IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(2, 4).match(/^\d{2}$/),
+      ).match(/^[A-Z]{2}$/);
+      expect(
+        iban.substring(2, 4),
         iban.substring(2, 4) +
           ' must contains only digit in AZ IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(4, 8).match(/^[A-Z]{4}$/),
+      ).match(/^\d{2}$/);
+      expect(
+        iban.substring(4, 8),
         iban.substring(4, 8) +
           ' must contains only characters in AZ IBAN ' +
           ibanFormated
-      );
-      assert.ok(
-        iban.substring(8, 28).match(/^\d{20}$/),
+      ).match(/^[A-Z]{4}$/);
+      expect(
+        iban.substring(8, 28),
         iban.substring(8, 28) +
           ' must contains 20 characters in AZ IBAN ' +
           ibanFormated
-      );
+      ).match(/^\d{20}$/);
 
-      assert.equal(
+      expect(
         ibanLib.mod97(ibanLib.toDigitString(bban)),
-        1,
         'the result should be equal to 1'
-      );
+      ).toBe(1);
     });
   });
 });
diff --git a/test/git.spec.ts b/test/git.spec.ts
new file mode 100644
index 00000000..f8c776f2
--- /dev/null
+++ b/test/git.spec.ts
@@ -0,0 +1,152 @@
+import type { JestMockCompat } from 'vitest';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+describe('git.js', () => {
+  describe('branch()', () => {
+    let spy_hacker_noun: JestMockCompat<[], string>;
+    let spy_hacker_verb: JestMockCompat<[], string>;
+
+    beforeEach(() => {
+      spy_hacker_noun = vi.spyOn(faker.hacker, 'noun');
+      spy_hacker_verb = vi.spyOn(faker.hacker, 'verb');
+    });
+
+    afterEach(() => {
+      spy_hacker_noun.mockRestore();
+      spy_hacker_verb.mockRestore();
+    });
+
+    it('returns a branch with hacker noun and verb', () => {
+      faker.git.branch();
+
+      expect(spy_hacker_noun).toHaveBeenCalledOnce();
+      expect(spy_hacker_verb).toHaveBeenCalledOnce();
+    });
+  });
+
+  describe('commitEntry()', () => {
+    let spy_git_commitMessage: JestMockCompat<[], string>;
+    let spy_git_commitSha: JestMockCompat<[], string>;
+    let spy_internet_email: JestMockCompat<
+      [firstName?: string, lastName?: string, provider?: string],
+      string
+    >;
+    let spy_name_firstName: JestMockCompat<[gender?: string | number], string>;
+    let spy_name_lastName: JestMockCompat<[gender?: string | number], string>;
+    let spy_datatype_number: JestMockCompat<
+      [
+        options?:
+          | number
+          | {
+              min?: number;
+              max?: number;
+              precision?: number;
+            }
+      ],
+      number
+    >;
+
+    beforeEach(() => {
+      spy_git_commitMessage = vi.spyOn(faker.git, 'commitMessage');
+      spy_git_commitSha = vi.spyOn(faker.git, 'commitSha');
+      spy_internet_email = vi.spyOn(faker.internet, 'email');
+      spy_name_firstName = vi.spyOn(faker.name, 'firstName');
+      spy_name_lastName = vi.spyOn(faker.name, 'lastName');
+      spy_datatype_number = vi.spyOn(faker.datatype, 'number');
+    });
+
+    afterEach(() => {
+      spy_git_commitMessage.mockRestore();
+      spy_git_commitSha.mockRestore();
+      spy_internet_email.mockRestore();
+      spy_name_firstName.mockRestore();
+      spy_name_lastName.mockRestore();
+      spy_datatype_number.mockRestore();
+    });
+
+    it('returns merge entry at random', () => {
+      faker.git.commitEntry();
+
+      expect(spy_datatype_number).toHaveBeenCalled();
+    });
+
+    it('returns a commit entry with git commit message and sha', () => {
+      faker.git.commitEntry();
+
+      expect(spy_git_commitMessage).toHaveBeenCalledOnce();
+      expect(spy_git_commitSha).toHaveBeenCalledOnce();
+    });
+
+    it('returns a commit entry with internet email', () => {
+      faker.git.commitEntry();
+
+      expect(spy_internet_email).toHaveBeenCalledOnce();
+    });
+
+    it('returns a commit entry with name first and last', () => {
+      faker.git.commitEntry();
+
+      expect(spy_name_firstName).toHaveBeenCalledTimes(2);
+      expect(spy_name_lastName).toHaveBeenCalledTimes(2);
+    });
+
+    describe("with options['merge'] equal to true", () => {
+      let spy_git_shortSha: JestMockCompat<[], string>;
+
+      beforeEach(() => {
+        spy_git_shortSha = vi.spyOn(faker.git, 'shortSha');
+      });
+
+      afterEach(() => {
+        spy_git_shortSha.mockRestore();
+      });
+
+      it('returns a commit entry with merge details', () => {
+        faker.git.commitEntry({ merge: true });
+
+        expect(spy_git_shortSha).toHaveBeenCalledTimes(2);
+      });
+    });
+  });
+
+  describe('commitMessage()', () => {
+    let spy_hacker_verb: JestMockCompat<[], string>;
+    let spy_hacker_adjective: JestMockCompat<[], string>;
+    let spy_hacker_noun: JestMockCompat<[], string>;
+
+    beforeEach(() => {
+      spy_hacker_verb = vi.spyOn(faker.hacker, 'verb');
+      spy_hacker_adjective = vi.spyOn(faker.hacker, 'adjective');
+      spy_hacker_noun = vi.spyOn(faker.hacker, 'noun');
+    });
+
+    afterEach(() => {
+      spy_hacker_verb.mockRestore();
+      spy_hacker_adjective.mockRestore();
+      spy_hacker_noun.mockRestore();
+    });
+
+    it('returns a commit message with hacker noun, adj and verb', () => {
+      faker.git.commitMessage();
+
+      expect(spy_hacker_verb).toHaveBeenCalledOnce();
+      expect(spy_hacker_adjective).toHaveBeenCalledOnce();
+      expect(spy_hacker_noun).toHaveBeenCalledOnce();
+    });
+  });
+
+  describe('commitSha()', () => {
+    it('returns a random commit SHA', () => {
+      const commitSha = faker.git.commitSha();
+      expect(commitSha).match(/^[a-f0-9]{40}$/);
+    });
+  });
+
+  describe('shortSha()', () => {
+    it('returns a random short SHA', () => {
+      const shortSha = faker.git.shortSha();
+      expect(shortSha).match(/^[a-f0-9]{7}$/);
+    });
+  });
+});
diff --git a/test/git.unit.js b/test/git.unit.js
deleted file mode 100644
index e5603bef..00000000
--- a/test/git.unit.js
+++ /dev/null
@@ -1,124 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('git.js', function () {
-  describe('branch()', function () {
-    beforeEach(function () {
-      sinon.spy(faker.hacker, 'noun');
-      sinon.spy(faker.hacker, 'verb');
-    });
-
-    afterEach(function () {
-      faker.hacker.noun.restore();
-      faker.hacker.verb.restore();
-    });
-
-    it('returns a branch with hacker noun and verb', function () {
-      faker.git.branch();
-
-      assert.ok(faker.hacker.noun.calledOnce);
-      assert.ok(faker.hacker.verb.calledOnce);
-    });
-  });
-
-  describe('commitEntry()', function () {
-    beforeEach(function () {
-      sinon.spy(faker.git, 'commitMessage');
-      sinon.spy(faker.git, 'commitSha');
-      sinon.spy(faker.internet, 'email');
-      sinon.spy(faker.name, 'firstName');
-      sinon.spy(faker.name, 'lastName');
-      sinon.spy(faker.datatype, 'number');
-    });
-
-    afterEach(function () {
-      faker.git.commitMessage.restore();
-      faker.git.commitSha.restore();
-      faker.internet.email.restore();
-      faker.name.firstName.restore();
-      faker.name.lastName.restore();
-      faker.datatype.number.restore();
-    });
-
-    it('returns merge entry at random', function () {
-      faker.git.commitEntry();
-
-      assert.ok(faker.datatype.number.called);
-    });
-
-    it('returns a commit entry with git commit message and sha', function () {
-      faker.git.commitEntry();
-
-      assert.ok(faker.git.commitMessage.calledOnce);
-      assert.ok(faker.git.commitSha.calledOnce);
-    });
-
-    it('returns a commit entry with internet email', function () {
-      faker.git.commitEntry();
-
-      assert.ok(faker.internet.email.calledOnce);
-    });
-
-    it('returns a commit entry with name first and last', function () {
-      faker.git.commitEntry();
-
-      assert.ok(faker.name.firstName.calledTwice);
-      assert.ok(faker.name.lastName.calledTwice);
-    });
-
-    context("with options['merge'] equal to true", function () {
-      beforeEach(function () {
-        sinon.spy(faker.git, 'shortSha');
-      });
-
-      afterEach(function () {
-        faker.git.shortSha.restore();
-      });
-
-      it('returns a commit entry with merge details', function () {
-        faker.git.commitEntry({ merge: true });
-
-        assert.ok(faker.git.shortSha.calledTwice);
-      });
-    });
-  });
-
-  describe('commitMessage()', function () {
-    beforeEach(function () {
-      sinon.spy(faker.hacker, 'verb');
-      sinon.spy(faker.hacker, 'adjective');
-      sinon.spy(faker.hacker, 'noun');
-    });
-
-    afterEach(function () {
-      faker.hacker.verb.restore();
-      faker.hacker.adjective.restore();
-      faker.hacker.noun.restore();
-    });
-
-    it('returns a commit message with hacker noun, adj and verb', function () {
-      faker.git.commitMessage();
-
-      assert.ok(faker.hacker.verb.calledOnce);
-      assert.ok(faker.hacker.adjective.calledOnce);
-      assert.ok(faker.hacker.noun.calledOnce);
-    });
-  });
-
-  describe('commitSha()', function () {
-    it('returns a random commit SHA', function () {
-      var commitSha = faker.git.commitSha();
-      assert.ok(commitSha.match(/^[a-f0-9]{40}$/));
-    });
-  });
-
-  describe('shortSha()', function () {
-    it('returns a random short SHA', function () {
-      var shortSha = faker.git.shortSha();
-      assert.ok(shortSha.match(/^[a-f0-9]{7}$/));
-    });
-  });
-});
diff --git a/test/helpers.spec.ts b/test/helpers.spec.ts
new file mode 100644
index 00000000..65e040dc
--- /dev/null
+++ b/test/helpers.spec.ts
@@ -0,0 +1,289 @@
+import { describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+import { luhnCheck } from './support/luhnCheck';
+
+describe('helpers.js', () => {
+  describe('replaceSymbolWithNumber()', () => {
+    describe('when no symbol passed in', () => {
+      it("uses '#' by default", () => {
+        const num = faker.helpers.replaceSymbolWithNumber('#AB');
+        expect(num).match(/\dAB/);
+      });
+    });
+
+    describe('when symbol passed in', () => {
+      it('replaces that symbol with integers', () => {
+        const num = faker.helpers.replaceSymbolWithNumber('#AB', 'A');
+        expect(num).match(/#\dB/);
+      });
+    });
+  });
+
+  describe('replaceSymbols()', () => {
+    describe("when '*' passed", () => {
+      it('replaces it with alphanumeric', () => {
+        const num = faker.helpers.replaceSymbols('*AB');
+        expect(num).match(/\wAB/);
+      });
+    });
+  });
+
+  describe('shuffle()', () => {
+    it('the output is the same length as the input', () => {
+      const spy_datatype_number = vi.spyOn(faker.datatype, 'number');
+
+      const shuffled = faker.helpers.shuffle(['a', 'b']);
+
+      expect(shuffled).toHaveLength(2);
+      expect(spy_datatype_number).toHaveBeenCalledWith(1);
+
+      spy_datatype_number.mockRestore();
+    });
+
+    it('empty array returns empty array', () => {
+      const shuffled = faker.helpers.shuffle([]);
+      expect(shuffled).toHaveLength(0);
+    });
+
+    it('mutates the input array in place', () => {
+      const input = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'];
+      const shuffled = faker.helpers.shuffle(input);
+      expect(shuffled).deep.eq(input);
+    });
+
+    it('all items shuffled as expected when seeded', () => {
+      const input = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'];
+      faker.seed(100);
+      const shuffled = faker.helpers.shuffle(input);
+      expect(shuffled).deep.eq([
+        'b',
+        'e',
+        'a',
+        'd',
+        'j',
+        'i',
+        'h',
+        'c',
+        'g',
+        'f',
+      ]);
+    });
+  });
+
+  describe('uniqueArray()', () => {
+    it('custom array returns unique array', () => {
+      const input = ['a', 'a', 'a', 'a,', 'a', 'a', 'a', 'a', 'b'];
+      const length = 2;
+      const unique = faker.helpers.uniqueArray(input, length);
+      expect(unique).toHaveLength(length);
+      expect(new Set(unique).size).toBe(length);
+    });
+
+    it('definition array returns unique array', () => {
+      const length = faker.datatype.number({ min: 1, max: 6 });
+      const unique = faker.helpers.uniqueArray(
+        faker.definitions.hacker.noun,
+        length
+      );
+      expect(unique).toHaveLength(length);
+      expect(new Set(unique).size).toBe(length);
+    });
+
+    it('function returns unique array', () => {
+      const length = faker.datatype.number({ min: 1, max: 6 });
+      const unique = faker.helpers.uniqueArray(faker.lorem.word, length);
+      expect(unique).toHaveLength(length);
+      expect(new Set(unique).size).toBe(length);
+    });
+
+    it('empty array returns empty array', () => {
+      const input = [];
+      const length = faker.datatype.number({ min: 1, max: 6 });
+      const unique = faker.helpers.uniqueArray(input, length);
+      expect(unique).toHaveLength(input.length);
+      expect(new Set(unique).size).toBe(input.length);
+    });
+
+    it('length longer than source returns max length', () => {
+      const input = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'];
+      const length = input.length + 1;
+      const unique = faker.helpers.uniqueArray(input, length);
+      expect(unique).toHaveLength(input.length);
+      expect(new Set(unique).size).toBe(input.length);
+    });
+
+    it('works as expected when seeded', () => {
+      const input = ['a', 'a', 'a', 'a', 'a', 'f', 'g', 'h', 'i', 'j'];
+      const length = 5;
+      faker.seed(100);
+      const unique = faker.helpers.uniqueArray(input, length);
+      expect(unique).deep.eq(['g', 'a', 'i', 'f', 'j']);
+    });
+  });
+
+  describe('slugify()', () => {
+    it('removes unwanted characters from URI string', () => {
+      expect(faker.helpers.slugify('Aiden.Harªann')).toBe('Aiden.Harann');
+      expect(faker.helpers.slugify("d'angelo.net")).toBe('dangelo.net');
+    });
+  });
+
+  describe('mustache()', () => {
+    it('returns empty string with no arguments', () => {
+      expect(
+        // @ts-expect-error
+        faker.helpers.mustache()
+      ).toBe('');
+    });
+  });
+
+  describe('repeatString()', () => {
+    it('returns empty string with no arguments', () => {
+      expect(
+        // @ts-expect-error
+        faker.helpers.repeatString()
+      ).toBe('');
+    });
+  });
+
+  describe('replaceSymbols()', () => {
+    it('returns empty string with no arguments', () => {
+      expect(faker.helpers.replaceSymbols()).toBe('');
+    });
+  });
+
+  /*
+    describe("replaceCreditCardSymbols()",  () =>{
+        it("returns empty string with no arguments",  () =>{
+            assert.equal(faker.helpers.replaceCreditCardSymbols(), "");
+        });
+    });
+    */
+
+  describe('createCard()', () => {
+    it('returns an object', () => {
+      const card = faker.helpers.createCard();
+      expect(typeof card).toBe('object');
+    });
+  });
+
+  describe('contextualCard()', () => {
+    it('returns an object', () => {
+      const card = faker.helpers.contextualCard();
+      expect(typeof card).toBe('object');
+    });
+  });
+
+  describe('userCard()', () => {
+    it('returns an object', () => {
+      const card = faker.helpers.userCard();
+      expect(typeof card).toBe('object');
+    });
+  });
+
+  // Make sure we keep this function for backward-compatibility.
+  describe('randomize()', () => {
+    it('returns a random element from an array', () => {
+      const arr = ['a', 'b', 'c'];
+      const elem = faker.helpers.randomize(arr);
+      expect(elem).toBeTruthy();
+      expect(arr).toContain(elem);
+    });
+  });
+
+  describe('replaceCreditCardSymbols()', () => {
+    it('returns a credit card number given a schema', () => {
+      const number = faker.helpers.replaceCreditCardSymbols(
+        '6453-####-####-####-###L'
+      );
+      expect(number).match(
+        /^6453\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}$/
+      );
+      expect(luhnCheck(number)).toBeTruthy();
+    });
+    it('supports different symbols', () => {
+      const number = faker.helpers.replaceCreditCardSymbols(
+        '6453-****-****-****-***L',
+        '*'
+      );
+      expect(number).match(
+        /^6453\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}$/
+      );
+      expect(luhnCheck(number)).toBeTruthy();
+    });
+    it('handles regexp style input', () => {
+      let number = faker.helpers.replaceCreditCardSymbols(
+        '6453-*{4}-*{4}-*{4}-*{3}L',
+        '*'
+      );
+      expect(number).match(
+        /^6453\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}$/
+      );
+      expect(luhnCheck(number)).toBeTruthy();
+      number = faker.helpers.replaceCreditCardSymbols(
+        '645[5-9]-#{4,6}-#{1,2}-#{4,6}-#{3}L'
+      );
+      expect(number).match(
+        /^645[5-9]\-([0-9]){4,6}\-([0-9]){1,2}\-([0-9]){4,6}\-([0-9]){4}$/
+      );
+      expect(luhnCheck(number)).toBeTruthy();
+    });
+  });
+
+  describe('regexpStyleStringParse()', () => {
+    it('returns an empty string when called without param', () => {
+      expect(faker.helpers.regexpStyleStringParse()).toBe('');
+    });
+
+    it('deals with range repeat', () => {
+      const string = faker.helpers.regexpStyleStringParse('#{5,10}');
+      expect(string.length).lessThanOrEqual(10);
+      expect(string.length).greaterThanOrEqual(5);
+      expect(string).match(/^\#{5,10}$/);
+    });
+
+    it('flips the range when min > max', () => {
+      const string = faker.helpers.regexpStyleStringParse('#{10,5}');
+      expect(string.length).lessThanOrEqual(10);
+      expect(string.length).greaterThanOrEqual(5);
+      expect(string).match(/^\#{5,10}$/);
+    });
+
+    it('repeats string {n} number of times', () => {
+      expect(faker.helpers.regexpStyleStringParse('%{10}')).toBe(
+        faker.helpers.repeatString('%', 10)
+      );
+      expect(faker.helpers.regexpStyleStringParse('%{30}')).toBe(
+        faker.helpers.repeatString('%', 30)
+      );
+      expect(faker.helpers.regexpStyleStringParse('%{5}')).toBe(
+        faker.helpers.repeatString('%', 5)
+      );
+    });
+
+    it('creates a numerical range', () => {
+      const string = faker.helpers.regexpStyleStringParse('Hello[0-9]');
+      expect(string).match(/^Hello[0-9]$/);
+    });
+
+    it('deals with multiple tokens in one string', () => {
+      const string = faker.helpers.regexpStyleStringParse(
+        'Test#{5}%{2,5}Testing**[1-5]**{10}END'
+      );
+      expect(string).match(/^Test\#{5}%{2,5}Testing\*\*[1-5]\*\*{10}END$/);
+    });
+  });
+
+  describe('createTransaction()', () => {
+    it('should create a random transaction', () => {
+      const transaction = faker.helpers.createTransaction();
+      expect(transaction).toBeTruthy();
+      expect(transaction.amount).toBeTruthy();
+      expect(transaction.date).toBeTruthy();
+      expect(transaction.business).toBeTruthy();
+      expect(transaction.name).toBeTruthy();
+      expect(transaction.type).toBeTruthy();
+      expect(transaction.account).toBeTruthy();
+    });
+  });
+});
diff --git a/test/helpers.unit.js b/test/helpers.unit.js
deleted file mode 100644
index b25daa22..00000000
--- a/test/helpers.unit.js
+++ /dev/null
@@ -1,284 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('helpers.js', function () {
-  describe('replaceSymbolWithNumber()', function () {
-    context('when no symbol passed in', function () {
-      it("uses '#' by default", function () {
-        var num = faker.helpers.replaceSymbolWithNumber('#AB');
-        assert.ok(num.match(/\dAB/));
-      });
-    });
-
-    context('when symbol passed in', function () {
-      it('replaces that symbol with integers', function () {
-        var num = faker.helpers.replaceSymbolWithNumber('#AB', 'A');
-        assert.ok(num.match(/#\dB/));
-      });
-    });
-  });
-
-  describe('replaceSymbols()', function () {
-    context("when '*' passed", function () {
-      it('replaces it with alphanumeric', function () {
-        var num = faker.helpers.replaceSymbols('*AB');
-        assert.ok(num.match(/\wAB/));
-      });
-    });
-  });
-
-  describe('shuffle()', function () {
-    it('the output is the same length as the input', function () {
-      sinon.spy(faker.datatype, 'number');
-      var shuffled = faker.helpers.shuffle(['a', 'b']);
-      assert.ok(shuffled.length === 2);
-      assert.ok(faker.datatype.number.calledWith(1));
-      faker.datatype.number.restore();
-    });
-
-    it('empty array returns empty array', function () {
-      var shuffled = faker.helpers.shuffle([]);
-      assert.ok(shuffled.length === 0);
-    });
-
-    it('mutates the input array in place', function () {
-      var input = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'];
-      var shuffled = faker.helpers.shuffle(input);
-      assert.deepStrictEqual(shuffled, input);
-    });
-
-    it('all items shuffled as expected when seeded', function () {
-      var input = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'];
-      faker.seed(100);
-      var shuffled = faker.helpers.shuffle(input);
-      assert.deepStrictEqual(shuffled, [
-        'b',
-        'e',
-        'a',
-        'd',
-        'j',
-        'i',
-        'h',
-        'c',
-        'g',
-        'f',
-      ]);
-    });
-  });
-
-  describe('uniqueArray()', function () {
-    it('custom array returns unique array', function () {
-      var input = ['a', 'a', 'a', 'a,', 'a', 'a', 'a', 'a', 'b'];
-      var length = 2;
-      var unique = faker.helpers.uniqueArray(input, length);
-      assert.strictEqual(unique.length, length);
-      assert.strictEqual(new Set(unique).size, length);
-    });
-
-    it('definition array returns unique array', function () {
-      var length = faker.datatype.number({ min: 1, max: 6 });
-      var unique = faker.helpers.uniqueArray(
-        faker.definitions.hacker.noun,
-        length
-      );
-      assert.strictEqual(unique.length, length);
-      assert.strictEqual(new Set(unique).size, length);
-    });
-
-    it('function returns unique array', function () {
-      var length = faker.datatype.number({ min: 1, max: 6 });
-      var unique = faker.helpers.uniqueArray(faker.lorem.word, length);
-      assert.strictEqual(unique.length, length);
-      assert.strictEqual(new Set(unique).size, length);
-    });
-
-    it('empty array returns empty array', function () {
-      var input = [];
-      var length = faker.datatype.number({ min: 1, max: 6 });
-      var unique = faker.helpers.uniqueArray(input, length);
-      assert.strictEqual(unique.length, input.length);
-      assert.strictEqual(new Set(unique).size, input.length);
-    });
-
-    it('length longer than source returns max length', function () {
-      var input = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'];
-      var length = input.length + 1;
-      var unique = faker.helpers.uniqueArray(input, length);
-      assert.strictEqual(unique.length, input.length);
-      assert.strictEqual(new Set(unique).size, input.length);
-    });
-
-    it('works as expected when seeded', function () {
-      var input = ['a', 'a', 'a', 'a', 'a', 'f', 'g', 'h', 'i', 'j'];
-      var length = 5;
-      faker.seed(100);
-      var unique = faker.helpers.uniqueArray(input, length);
-      assert.deepStrictEqual(unique, ['g', 'a', 'i', 'f', 'j']);
-    });
-  });
-
-  describe('slugify()', function () {
-    it('removes unwanted characters from URI string', function () {
-      assert.strictEqual(
-        faker.helpers.slugify('Aiden.Harªann'),
-        'Aiden.Harann'
-      );
-      assert.strictEqual(faker.helpers.slugify("d'angelo.net"), 'dangelo.net');
-    });
-  });
-
-  describe('mustache()', function () {
-    it('returns empty string with no arguments', function () {
-      assert.strictEqual(faker.helpers.mustache(), '');
-    });
-  });
-
-  describe('repeatString()', function () {
-    it('returns empty string with no arguments', function () {
-      assert.strictEqual(faker.helpers.repeatString(), '');
-    });
-  });
-
-  describe('replaceSymbols()', function () {
-    it('returns empty string with no arguments', function () {
-      assert.strictEqual(faker.helpers.replaceSymbols(), '');
-    });
-  });
-
-  /*
-    describe("replaceCreditCardSymbols()", function () {
-        it("returns empty string with no arguments", function () {
-            assert.equal(faker.helpers.replaceCreditCardSymbols(), "");
-        });
-    });
-    */
-
-  describe('createCard()', function () {
-    it('returns an object', function () {
-      var card = faker.helpers.createCard();
-      assert.ok(typeof card === 'object');
-    });
-  });
-
-  describe('contextualCard()', function () {
-    it('returns an object', function () {
-      var card = faker.helpers.contextualCard();
-      assert.ok(typeof card === 'object');
-    });
-  });
-
-  describe('userCard()', function () {
-    it('returns an object', function () {
-      var card = faker.helpers.userCard();
-      assert.ok(typeof card === 'object');
-    });
-  });
-
-  // Make sure we keep this function for backward-compatibility.
-  describe('randomize()', function () {
-    it('returns a random element from an array', function () {
-      var arr = ['a', 'b', 'c'];
-      var elem = faker.helpers.randomize(arr);
-      assert.ok(elem);
-      assert.ok(arr.indexOf(elem) !== -1);
-    });
-  });
-
-  describe('replaceCreditCardSymbols()', function () {
-    var luhnCheck = require('./support/luhnCheck.js');
-    it('returns a credit card number given a schema', function () {
-      var number = faker.helpers.replaceCreditCardSymbols(
-        '6453-####-####-####-###L'
-      );
-      assert.ok(
-        number.match(/^6453\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}$/)
-      );
-      assert.ok(luhnCheck(number));
-    });
-    it('supports different symbols', function () {
-      var number = faker.helpers.replaceCreditCardSymbols(
-        '6453-****-****-****-***L',
-        '*'
-      );
-      assert.ok(
-        number.match(/^6453\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}$/)
-      );
-      assert.ok(luhnCheck(number));
-    });
-    it('handles regexp style input', function () {
-      var number = faker.helpers.replaceCreditCardSymbols(
-        '6453-*{4}-*{4}-*{4}-*{3}L',
-        '*'
-      );
-      assert.ok(
-        number.match(/^6453\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}\-([0-9]){4}$/)
-      );
-      assert.ok(luhnCheck(number));
-      number = faker.helpers.replaceCreditCardSymbols(
-        '645[5-9]-#{4,6}-#{1,2}-#{4,6}-#{3}L'
-      );
-      assert.ok(
-        number.match(
-          /^645[5-9]\-([0-9]){4,6}\-([0-9]){1,2}\-([0-9]){4,6}\-([0-9]){4}$/
-        )
-      );
-      assert.ok(luhnCheck(number));
-    });
-  });
-
-  describe('regexpStyleStringParse()', function () {
-    it('returns an empty string when called without param', function () {
-      assert.ok(faker.helpers.regexpStyleStringParse() === '');
-    });
-    it('deals with range repeat', function () {
-      var string = faker.helpers.regexpStyleStringParse('#{5,10}');
-      assert.ok(string.length <= 10 && string.length >= 5);
-      assert.ok(string.match(/^\#{5,10}$/));
-    });
-    it('flips the range when min > max', function () {
-      var string = faker.helpers.regexpStyleStringParse('#{10,5}');
-      assert.ok(string.length <= 10 && string.length >= 5);
-      assert.ok(string.match(/^\#{5,10}$/));
-    });
-    it('repeats string {n} number of times', function () {
-      assert.ok(
-        faker.helpers.regexpStyleStringParse('%{10}') ===
-          faker.helpers.repeatString('%', 10)
-      );
-      assert.ok(
-        faker.helpers.regexpStyleStringParse('%{30}') ===
-          faker.helpers.repeatString('%', 30)
-      );
-      assert.ok(
-        faker.helpers.regexpStyleStringParse('%{5}') ===
-          faker.helpers.repeatString('%', 5)
-      );
-    });
-    it('creates a numerical range', function () {
-      var string = faker.helpers.regexpStyleStringParse('Hello[0-9]');
-      assert.ok(string.match(/^Hello[0-9]$/));
-    });
-    it('deals with multiple tokens in one string', function () {
-      var string = faker.helpers.regexpStyleStringParse(
-        'Test#{5}%{2,5}Testing**[1-5]**{10}END'
-      );
-      assert.ok(string.match(/^Test\#{5}%{2,5}Testing\*\*[1-5]\*\*{10}END$/));
-    });
-  });
-
-  describe('createTransaction()', function () {
-    it('should create a random transaction', function () {
-      var transaction = faker.helpers.createTransaction();
-      assert.ok(transaction);
-      assert.ok(transaction.amount);
-      assert.ok(transaction.date);
-      assert.ok(transaction.business);
-      assert.ok(transaction.name);
-      assert.ok(transaction.type);
-      assert.ok(transaction.account);
-    });
-  });
-});
diff --git a/test/image.spec.ts b/test/image.spec.ts
new file mode 100644
index 00000000..f585aa1e
--- /dev/null
+++ b/test/image.spec.ts
@@ -0,0 +1,349 @@
+import { describe, expect, it } from 'vitest';
+import { faker } from '../lib';
+
+describe('image', () => {
+  describe('lorempicsum', () => {
+    describe('imageUrl()', () => {
+      it('returns a random image url from lorempixel', () => {
+        const imageUrl = faker.image.lorempicsum.imageUrl();
+
+        expect(imageUrl).toBe('https://picsum.photos/640/480');
+      });
+
+      it('returns a random image url from lorem picsum with width and height', () => {
+        const imageUrl = faker.image.lorempicsum.imageUrl(100, 100);
+
+        expect(imageUrl).toBe('https://picsum.photos/100/100');
+      });
+
+      it('returns a random image url grayscaled', () => {
+        const imageUrl = faker.image.lorempicsum.imageUrl(100, 100, true);
+
+        expect(imageUrl).toBe('https://picsum.photos/100/100?grayscale');
+      });
+
+      it('returns a random image url grayscaled and blurred', () => {
+        const imageUrl = faker.image.lorempicsum.imageUrl(100, 100, true, 2);
+
+        expect(imageUrl).toBe('https://picsum.photos/100/100?grayscale&blur=2');
+      });
+
+      it('returns a random image url blurred', () => {
+        const imageUrl = faker.image.lorempicsum.imageUrl(
+          100,
+          100,
+          undefined,
+          2
+        );
+
+        expect(imageUrl).toBe('https://picsum.photos/100/100?blur=2');
+      });
+
+      it('returns a random image url with seed', () => {
+        const imageUrl = faker.image.lorempicsum.imageUrl(
+          100,
+          100,
+          undefined,
+          undefined,
+          'picsum'
+        );
+
+        expect(imageUrl).toBe('https://picsum.photos/seed/picsum/100/100');
+      });
+    });
+
+    describe('avatar()', () => {
+      it('return a random avatar from cloudflare-ipfs', () => {
+        expect(
+          faker.image.lorempicsum
+            .avatar()
+            .includes(
+              'cloudflare-ipfs.com/ipfs/Qmd3W5DuhgHirLHGVixi6V76LhCkZUz6pnFt5AJBiyvHye/avatar'
+            )
+        ).toBeTruthy();
+      });
+    });
+
+    describe('imageGrayscale()', () => {
+      it('returns a random URL with grayscale image', () => {
+        const imageUrl = faker.image.lorempicsum.imageGrayscale(100, 100, true);
+
+        expect(imageUrl).toBe('https://picsum.photos/100/100?grayscale');
+      });
+    });
+
+    describe('imageBlurred()', () => {
+      it('returns a random image url blurred', () => {
+        const imageUrl = faker.image.lorempicsum.imageBlurred(100, 100, 2);
+
+        expect(imageUrl).toBe('https://picsum.photos/100/100?blur=2');
+      });
+    });
+
+    describe('imageRandomSeeded()', () => {
+      it('returns a random image url blurred', () => {
+        const imageUrl = faker.image.lorempicsum.imageRandomSeeded(
+          100,
+          100,
+          undefined,
+          undefined,
+          'picsum'
+        );
+
+        expect(imageUrl).toBe('https://picsum.photos/seed/picsum/100/100');
+      });
+    });
+  });
+
+  describe('lorempixel', () => {
+    describe('imageUrl()', () => {
+      it('returns a random image url from lorempixel', () => {
+        const imageUrl = faker.image.lorempixel.imageUrl();
+
+        expect(imageUrl).toBe('https://lorempixel.com/640/480');
+      });
+
+      it('returns a random image url from lorempixel with width and height', () => {
+        const imageUrl = faker.image.lorempixel.imageUrl(100, 100);
+
+        expect(imageUrl).toBe('https://lorempixel.com/100/100');
+      });
+
+      it('returns a random image url for a specified category', () => {
+        const imageUrl = faker.image.lorempixel.imageUrl(100, 100, 'abstract');
+
+        expect(imageUrl).toBe('https://lorempixel.com/100/100/abstract');
+      });
+    });
+
+    describe('avatar()', () => {
+      it('return a random avatar from cloudflare-ipfs', () => {
+        expect(
+          faker.image.lorempixel
+            .avatar()
+            .includes(
+              'cloudflare-ipfs.com/ipfs/Qmd3W5DuhgHirLHGVixi6V76LhCkZUz6pnFt5AJBiyvHye/avatar'
+            )
+        ).toBeTruthy();
+      });
+    });
+
+    describe('abstract()', () => {
+      it('returns a random abstract image url', () => {
+        const abstract = faker.image.lorempixel.abstract();
+        expect(abstract).toBe('https://lorempixel.com/640/480/abstract');
+      });
+    });
+
+    describe('animals()', () => {
+      it('returns a random animals image url', () => {
+        const animals = faker.image.lorempixel.animals();
+        expect(animals).toBe('https://lorempixel.com/640/480/animals');
+      });
+    });
+
+    describe('business()', () => {
+      it('returns a random business image url', () => {
+        const business = faker.image.lorempixel.business();
+        expect(business).toBe('https://lorempixel.com/640/480/business');
+      });
+    });
+
+    describe('cats()', () => {
+      it('returns a random cats image url', () => {
+        const cats = faker.image.lorempixel.cats();
+        expect(cats).toBe('https://lorempixel.com/640/480/cats');
+      });
+    });
+
+    describe('city()', () => {
+      it('returns a random city image url', () => {
+        const city = faker.image.lorempixel.city();
+        expect(city).toBe('https://lorempixel.com/640/480/city');
+      });
+    });
+
+    describe('food()', () => {
+      it('returns a random food image url', () => {
+        const food = faker.image.lorempixel.food();
+        expect(food).toBe('https://lorempixel.com/640/480/food');
+      });
+    });
+
+    describe('nightlife()', () => {
+      it('returns a random nightlife image url', () => {
+        const nightlife = faker.image.lorempixel.nightlife();
+        expect(nightlife).toBe('https://lorempixel.com/640/480/nightlife');
+      });
+    });
+
+    describe('fashion()', () => {
+      it('returns a random fashion image url', () => {
+        const fashion = faker.image.lorempixel.fashion();
+        expect(fashion).toBe('https://lorempixel.com/640/480/fashion');
+      });
+    });
+
+    describe('people()', () => {
+      it('returns a random people image url', () => {
+        const people = faker.image.lorempixel.people();
+        expect(people).toBe('https://lorempixel.com/640/480/people');
+      });
+    });
+
+    describe('nature()', () => {
+      it('returns a random nature image url', () => {
+        const nature = faker.image.lorempixel.nature();
+        expect(nature).toBe('https://lorempixel.com/640/480/nature');
+      });
+    });
+
+    describe('sports()', () => {
+      it('returns a random sports image url', () => {
+        const sports = faker.image.lorempixel.sports();
+        expect(sports).toBe('https://lorempixel.com/640/480/sports');
+      });
+    });
+
+    describe('technics()', () => {
+      it('returns a random technics image url', () => {
+        const technics = faker.image.lorempixel.technics();
+        expect(technics).toBe('https://lorempixel.com/640/480/technics');
+      });
+    });
+
+    describe('transport()', () => {
+      it('returns a random transport image url', () => {
+        const transport = faker.image.lorempixel.transport();
+        expect(transport).toBe('https://lorempixel.com/640/480/transport');
+      });
+    });
+  });
+
+  describe('unsplash', () => {
+    describe('imageUrl()', () => {
+      it('returns a random image url from unsplash', () => {
+        const imageUrl = faker.image.unsplash.imageUrl();
+
+        expect(imageUrl).toBe('https://source.unsplash.com/640x480');
+      });
+
+      it('returns a random image url from unsplash with width and height', () => {
+        const imageUrl = faker.image.unsplash.imageUrl(100, 100);
+
+        expect(imageUrl).toBe('https://source.unsplash.com/100x100');
+      });
+
+      it('returns a random image url for a specified category', () => {
+        const imageUrl = faker.image.unsplash.imageUrl(100, 100, 'food');
+
+        expect(imageUrl).toBe(
+          'https://source.unsplash.com/category/food/100x100'
+        );
+      });
+
+      it('returns a random image url with correct keywords for a specified category', () => {
+        const imageUrl = faker.image.unsplash.imageUrl(
+          100,
+          100,
+          'food',
+          'keyword1,keyword2'
+        );
+
+        expect(imageUrl).toBe(
+          'https://source.unsplash.com/category/food/100x100?keyword1,keyword2'
+        );
+      });
+
+      it('returns a random image url without keyword which format is wrong for a specified category', () => {
+        const imageUrl = faker.image.unsplash.imageUrl(
+          100,
+          100,
+          'food',
+          'keyword1,?ds)0123$*908932409'
+        );
+
+        expect(imageUrl).toBe(
+          'https://source.unsplash.com/category/food/100x100'
+        );
+      });
+    });
+
+    describe('image()', () => {
+      it('returns a searching image url with keyword', () => {
+        const food = faker.image.unsplash.image(
+          100,
+          200,
+          'keyword1,keyword2,keyword3'
+        );
+        expect(food).toBe(
+          'https://source.unsplash.com/100x200?keyword1,keyword2,keyword3'
+        );
+      });
+    });
+
+    describe('food()', () => {
+      it('returns a random food image url', () => {
+        const food = faker.image.unsplash.food();
+        expect(food).toBe('https://source.unsplash.com/category/food/640x480');
+      });
+    });
+
+    describe('people()', () => {
+      it('returns a random people image url', () => {
+        const people = faker.image.unsplash.people();
+        expect(people).toBe(
+          'https://source.unsplash.com/category/people/640x480'
+        );
+      });
+    });
+
+    describe('nature()', () => {
+      it('returns a random nature image url', () => {
+        const nature = faker.image.unsplash.nature();
+        expect(nature).toBe(
+          'https://source.unsplash.com/category/nature/640x480'
+        );
+      });
+    });
+
+    describe('technology()', () => {
+      it('returns a random technology image url', () => {
+        const transport = faker.image.unsplash.technology();
+        expect(transport).toBe(
+          'https://source.unsplash.com/category/technology/640x480'
+        );
+      });
+    });
+    describe('objects()', () => {
+      it('returns a random objects image url', () => {
+        const transport = faker.image.unsplash.objects();
+        expect(transport).toBe(
+          'https://source.unsplash.com/category/objects/640x480'
+        );
+      });
+    });
+    describe('buildings()', () => {
+      it('returns a random buildings image url', () => {
+        const transport = faker.image.unsplash.buildings();
+        expect(transport).toBe(
+          'https://source.unsplash.com/category/buildings/640x480'
+        );
+      });
+    });
+  });
+  describe('dataUri', () => {
+    it('returns a blank data', () => {
+      const dataUri = faker.image.dataUri(200, 300);
+      expect(dataUri).toBe(
+        'data:image/svg+xml;charset=UTF-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20version%3D%221.1%22%20baseProfile%3D%22full%22%20width%3D%22200%22%20height%3D%22300%22%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20fill%3D%22grey%22%2F%3E%3Ctext%20x%3D%22100%22%20y%3D%22150%22%20font-size%3D%2220%22%20alignment-baseline%3D%22middle%22%20text-anchor%3D%22middle%22%20fill%3D%22white%22%3E200x300%3C%2Ftext%3E%3C%2Fsvg%3E'
+      );
+    });
+    it('returns a customed background color data URI', () => {
+      const dataUri = faker.image.dataUri(200, 300, 'red');
+      expect(dataUri).toBe(
+        'data:image/svg+xml;charset=UTF-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20version%3D%221.1%22%20baseProfile%3D%22full%22%20width%3D%22200%22%20height%3D%22300%22%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20fill%3D%22red%22%2F%3E%3Ctext%20x%3D%22100%22%20y%3D%22150%22%20font-size%3D%2220%22%20alignment-baseline%3D%22middle%22%20text-anchor%3D%22middle%22%20fill%3D%22white%22%3E200x300%3C%2Ftext%3E%3C%2Fsvg%3E'
+      );
+    });
+  });
+});
diff --git a/test/image.unit.js b/test/image.unit.js
deleted file mode 100644
index 46678db8..00000000
--- a/test/image.unit.js
+++ /dev/null
@@ -1,348 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('image.js', function () {
-  describe('lorempicsum', function () {
-    describe('imageUrl()', function () {
-      it('returns a random image url from lorempixel', function () {
-        var imageUrl = faker.image.lorempicsum.imageUrl();
-
-        assert.strictEqual(imageUrl, 'https://picsum.photos/640/480');
-      });
-      it('returns a random image url from lorem picsum with width and height', function () {
-        var imageUrl = faker.image.lorempicsum.imageUrl(100, 100);
-
-        assert.strictEqual(imageUrl, 'https://picsum.photos/100/100');
-      });
-      it('returns a random image url grayscaled', function () {
-        var imageUrl = faker.image.lorempicsum.imageUrl(100, 100, true);
-
-        assert.strictEqual(imageUrl, 'https://picsum.photos/100/100?grayscale');
-      });
-
-      it('returns a random image url grayscaled and blurred', function () {
-        var imageUrl = faker.image.lorempicsum.imageUrl(100, 100, true, 2);
-
-        assert.strictEqual(
-          imageUrl,
-          'https://picsum.photos/100/100?grayscale&blur=2'
-        );
-      });
-
-      it('returns a random image url blurred', function () {
-        var imageUrl = faker.image.lorempicsum.imageUrl(100, 100, undefined, 2);
-
-        assert.strictEqual(imageUrl, 'https://picsum.photos/100/100?blur=2');
-      });
-
-      it('returns a random image url with seed', function () {
-        var imageUrl = faker.image.lorempicsum.imageUrl(
-          100,
-          100,
-          undefined,
-          undefined,
-          'picsum'
-        );
-
-        assert.strictEqual(
-          imageUrl,
-          'https://picsum.photos/seed/picsum/100/100'
-        );
-      });
-    });
-    describe('avatar()', function () {
-      it('return a random avatar from cloudflare-ipfs', function () {
-        assert.notStrictEqual(
-          -1,
-          faker.image.lorempicsum
-            .avatar()
-            .indexOf(
-              'cloudflare-ipfs.com/ipfs/Qmd3W5DuhgHirLHGVixi6V76LhCkZUz6pnFt5AJBiyvHye/avatar'
-            )
-        );
-      });
-    });
-
-    describe('imageGrayscale()', function () {
-      it('returns a random URL with grayscale image', function () {
-        var imageUrl = faker.image.lorempicsum.imageGrayscale(100, 100, true);
-
-        assert.strictEqual(imageUrl, 'https://picsum.photos/100/100?grayscale');
-      });
-    });
-    describe('imageBlurred()', function () {
-      it('returns a random image url blurred', function () {
-        var imageUrl = faker.image.lorempicsum.imageBlurred(100, 100, 2);
-
-        assert.strictEqual(imageUrl, 'https://picsum.photos/100/100?blur=2');
-      });
-    });
-    describe('imageRandomSeeded()', function () {
-      it('returns a random image url blurred', function () {
-        var imageUrl = faker.image.lorempicsum.imageRandomSeeded(
-          100,
-          100,
-          undefined,
-          undefined,
-          'picsum'
-        );
-
-        assert.strictEqual(
-          imageUrl,
-          'https://picsum.photos/seed/picsum/100/100'
-        );
-      });
-    });
-  });
-
-  describe('lorempixel', function () {
-    describe('imageUrl()', function () {
-      it('returns a random image url from lorempixel', function () {
-        var imageUrl = faker.image.lorempixel.imageUrl();
-
-        assert.strictEqual(imageUrl, 'https://lorempixel.com/640/480');
-      });
-      it('returns a random image url from lorempixel with width and height', function () {
-        var imageUrl = faker.image.lorempixel.imageUrl(100, 100);
-
-        assert.strictEqual(imageUrl, 'https://lorempixel.com/100/100');
-      });
-      it('returns a random image url for a specified category', function () {
-        var imageUrl = faker.image.lorempixel.imageUrl(100, 100, 'abstract');
-
-        assert.strictEqual(imageUrl, 'https://lorempixel.com/100/100/abstract');
-      });
-    });
-    describe('avatar()', function () {
-      it('return a random avatar from cloudflare-ipfs', function () {
-        assert.notStrictEqual(
-          -1,
-          faker.image.lorempixel
-            .avatar()
-            .indexOf(
-              'cloudflare-ipfs.com/ipfs/Qmd3W5DuhgHirLHGVixi6V76LhCkZUz6pnFt5AJBiyvHye/avatar'
-            )
-        );
-      });
-    });
-    describe('abstract()', function () {
-      it('returns a random abstract image url', function () {
-        var abstract = faker.image.lorempixel.abstract();
-        assert.strictEqual(abstract, 'https://lorempixel.com/640/480/abstract');
-      });
-    });
-    describe('animals()', function () {
-      it('returns a random animals image url', function () {
-        var animals = faker.image.lorempixel.animals();
-        assert.strictEqual(animals, 'https://lorempixel.com/640/480/animals');
-      });
-    });
-    describe('business()', function () {
-      it('returns a random business image url', function () {
-        var business = faker.image.lorempixel.business();
-        assert.strictEqual(business, 'https://lorempixel.com/640/480/business');
-      });
-    });
-    describe('cats()', function () {
-      it('returns a random cats image url', function () {
-        var cats = faker.image.lorempixel.cats();
-        assert.strictEqual(cats, 'https://lorempixel.com/640/480/cats');
-      });
-    });
-    describe('city()', function () {
-      it('returns a random city image url', function () {
-        var city = faker.image.lorempixel.city();
-        assert.strictEqual(city, 'https://lorempixel.com/640/480/city');
-      });
-    });
-    describe('food()', function () {
-      it('returns a random food image url', function () {
-        var food = faker.image.lorempixel.food();
-        assert.strictEqual(food, 'https://lorempixel.com/640/480/food');
-      });
-    });
-    describe('nightlife()', function () {
-      it('returns a random nightlife image url', function () {
-        var nightlife = faker.image.lorempixel.nightlife();
-        assert.strictEqual(
-          nightlife,
-          'https://lorempixel.com/640/480/nightlife'
-        );
-      });
-    });
-    describe('fashion()', function () {
-      it('returns a random fashion image url', function () {
-        var fashion = faker.image.lorempixel.fashion();
-        assert.strictEqual(fashion, 'https://lorempixel.com/640/480/fashion');
-      });
-    });
-    describe('people()', function () {
-      it('returns a random people image url', function () {
-        var people = faker.image.lorempixel.people();
-        assert.strictEqual(people, 'https://lorempixel.com/640/480/people');
-      });
-    });
-    describe('nature()', function () {
-      it('returns a random nature image url', function () {
-        var nature = faker.image.lorempixel.nature();
-        assert.strictEqual(nature, 'https://lorempixel.com/640/480/nature');
-      });
-    });
-    describe('sports()', function () {
-      it('returns a random sports image url', function () {
-        var sports = faker.image.lorempixel.sports();
-        assert.strictEqual(sports, 'https://lorempixel.com/640/480/sports');
-      });
-    });
-    describe('technics()', function () {
-      it('returns a random technics image url', function () {
-        var technics = faker.image.lorempixel.technics();
-        assert.strictEqual(technics, 'https://lorempixel.com/640/480/technics');
-      });
-    });
-    describe('transport()', function () {
-      it('returns a random transport image url', function () {
-        var transport = faker.image.lorempixel.transport();
-        assert.strictEqual(
-          transport,
-          'https://lorempixel.com/640/480/transport'
-        );
-      });
-    });
-  });
-
-  describe('unsplash', function () {
-    describe('imageUrl()', function () {
-      it('returns a random image url from unsplash', function () {
-        var imageUrl = faker.image.unsplash.imageUrl();
-
-        assert.strictEqual(imageUrl, 'https://source.unsplash.com/640x480');
-      });
-      it('returns a random image url from unsplash with width and height', function () {
-        var imageUrl = faker.image.unsplash.imageUrl(100, 100);
-
-        assert.strictEqual(imageUrl, 'https://source.unsplash.com/100x100');
-      });
-      it('returns a random image url for a specified category', function () {
-        var imageUrl = faker.image.unsplash.imageUrl(100, 100, 'food');
-
-        assert.strictEqual(
-          imageUrl,
-          'https://source.unsplash.com/category/food/100x100'
-        );
-      });
-      it('returns a random image url with correct keywords for a specified category', function () {
-        var imageUrl = faker.image.unsplash.imageUrl(
-          100,
-          100,
-          'food',
-          'keyword1,keyword2'
-        );
-
-        assert.strictEqual(
-          imageUrl,
-          'https://source.unsplash.com/category/food/100x100?keyword1,keyword2'
-        );
-      });
-      it('returns a random image url without keyword which format is wrong for a specified category', function () {
-        var imageUrl = faker.image.unsplash.imageUrl(
-          100,
-          100,
-          'food',
-          'keyword1,?ds)0123$*908932409'
-        );
-
-        assert.strictEqual(
-          imageUrl,
-          'https://source.unsplash.com/category/food/100x100'
-        );
-      });
-    });
-    describe('image()', function () {
-      it('returns a searching image url with keyword', function () {
-        var food = faker.image.unsplash.image(
-          100,
-          200,
-          'keyword1,keyword2,keyword3'
-        );
-        assert.strictEqual(
-          food,
-          'https://source.unsplash.com/100x200?keyword1,keyword2,keyword3'
-        );
-      });
-    });
-    describe('food()', function () {
-      it('returns a random food image url', function () {
-        var food = faker.image.unsplash.food();
-        assert.strictEqual(
-          food,
-          'https://source.unsplash.com/category/food/640x480'
-        );
-      });
-    });
-    describe('people()', function () {
-      it('returns a random people image url', function () {
-        var people = faker.image.unsplash.people();
-        assert.strictEqual(
-          people,
-          'https://source.unsplash.com/category/people/640x480'
-        );
-      });
-    });
-    describe('nature()', function () {
-      it('returns a random nature image url', function () {
-        var nature = faker.image.unsplash.nature();
-        assert.strictEqual(
-          nature,
-          'https://source.unsplash.com/category/nature/640x480'
-        );
-      });
-    });
-    describe('technology()', function () {
-      it('returns a random technology image url', function () {
-        var transport = faker.image.unsplash.technology();
-        assert.strictEqual(
-          transport,
-          'https://source.unsplash.com/category/technology/640x480'
-        );
-      });
-    });
-    describe('objects()', function () {
-      it('returns a random objects image url', function () {
-        var transport = faker.image.unsplash.objects();
-        assert.strictEqual(
-          transport,
-          'https://source.unsplash.com/category/objects/640x480'
-        );
-      });
-    });
-    describe('buildings()', function () {
-      it('returns a random buildings image url', function () {
-        var transport = faker.image.unsplash.buildings();
-        assert.strictEqual(
-          transport,
-          'https://source.unsplash.com/category/buildings/640x480'
-        );
-      });
-    });
-  });
-  describe('dataUri', function () {
-    it('returns a blank data', function () {
-      var dataUri = faker.image.dataUri(200, 300);
-      assert.strictEqual(
-        dataUri,
-        'data:image/svg+xml;charset=UTF-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20version%3D%221.1%22%20baseProfile%3D%22full%22%20width%3D%22200%22%20height%3D%22300%22%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20fill%3D%22grey%22%2F%3E%3Ctext%20x%3D%22100%22%20y%3D%22150%22%20font-size%3D%2220%22%20alignment-baseline%3D%22middle%22%20text-anchor%3D%22middle%22%20fill%3D%22white%22%3E200x300%3C%2Ftext%3E%3C%2Fsvg%3E'
-      );
-    });
-    it('returns a customed background color data URI', function () {
-      var dataUri = faker.image.dataUri(200, 300, 'red');
-      assert.strictEqual(
-        dataUri,
-        'data:image/svg+xml;charset=UTF-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20version%3D%221.1%22%20baseProfile%3D%22full%22%20width%3D%22200%22%20height%3D%22300%22%3E%3Crect%20width%3D%22100%25%22%20height%3D%22100%25%22%20fill%3D%22red%22%2F%3E%3Ctext%20x%3D%22100%22%20y%3D%22150%22%20font-size%3D%2220%22%20alignment-baseline%3D%22middle%22%20text-anchor%3D%22middle%22%20fill%3D%22white%22%3E200x300%3C%2Ftext%3E%3C%2Fsvg%3E'
-      );
-    });
-  });
-});
diff --git a/test/internet.spec.ts b/test/internet.spec.ts
new file mode 100644
index 00000000..9df1e805
--- /dev/null
+++ b/test/internet.spec.ts
@@ -0,0 +1,271 @@
+import { describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+describe('internet.js', () => {
+  describe('email()', () => {
+    it('returns an email', () => {
+      const spy_internet_userName = vi
+        .spyOn(faker.internet, 'userName')
+        .mockReturnValue('Aiden.Harann55');
+
+      const email = faker.internet.email('Aiden.Harann55');
+      const res = email.split('@')[0];
+
+      expect(res).toBe('Aiden.Harann55');
+
+      spy_internet_userName.mockRestore();
+    });
+
+    it('returns an email with japanese characters', () => {
+      const spy_internet_userName = vi
+        .spyOn(faker.internet, 'userName')
+        .mockReturnValue('思源_唐3');
+
+      const email = faker.internet.email('思源_唐3');
+      const res = email.split('@')[0];
+
+      expect(res).toBe('思源_唐3');
+
+      spy_internet_userName.mockRestore();
+    });
+  });
+
+  describe('exampleEmail', () => {
+    it('returns an email with the correct name', () => {
+      const spy_internet_userName = vi
+        .spyOn(faker.internet, 'userName')
+        .mockReturnValue('Aiden.Harann55');
+
+      const email = faker.internet.email('Aiden.Harann55');
+      const res = email.split('@')[0];
+
+      expect(res).toBe('Aiden.Harann55');
+
+      spy_internet_userName.mockRestore();
+    });
+
+    it('uses the example.[org|com|net] host', () => {
+      const email = faker.internet.exampleEmail();
+      expect(email).match(/@example\.(org|com|net)$/);
+    });
+  });
+
+  describe('userName()', () => {
+    it('occasionally returns a single firstName', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockReturnValue(0);
+      const spy_name_firstName = vi.spyOn(faker.name, 'firstName');
+
+      const username = faker.internet.userName();
+
+      expect(username).toBeTruthy();
+      expect(spy_name_firstName).toHaveBeenCalled();
+
+      spy_datatype_number.mockRestore();
+      spy_name_firstName.mockRestore();
+    });
+
+    it('occasionally returns a firstName with a period or hyphen and a lastName', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockReturnValue(1);
+      const spy_name_firstName = vi.spyOn(faker.name, 'firstName');
+      const spy_name_lastName = vi.spyOn(faker.name, 'lastName');
+      const spy_random_arrayElement = vi.spyOn(faker.random, 'arrayElement');
+
+      const username = faker.internet.userName();
+
+      expect(username).toBeTruthy();
+      expect(spy_name_firstName).toHaveBeenCalled();
+      expect(spy_name_lastName).toHaveBeenCalled();
+      expect(spy_random_arrayElement).toHaveBeenCalledWith(['.', '_']);
+
+      spy_datatype_number.mockRestore();
+      spy_name_firstName.mockRestore();
+      spy_name_lastName.mockRestore();
+      spy_random_arrayElement.mockRestore();
+    });
+  });
+
+  describe('domainName()', () => {
+    it('returns a domainWord plus a random suffix', () => {
+      const spy_internet_domainWord = vi
+        .spyOn(faker.internet, 'domainWord')
+        .mockReturnValue('bar');
+      const spy_internet_domainSuffix = vi
+        .spyOn(faker.internet, 'domainSuffix')
+        .mockReturnValue('net');
+
+      const domain_name = faker.internet.domainName();
+
+      expect(domain_name).toBe('bar.net');
+
+      spy_internet_domainWord.mockRestore();
+      spy_internet_domainSuffix.mockRestore();
+    });
+  });
+
+  describe('domainWord()', () => {
+    it('returns a lower-case adjective + noun', () => {
+      const spy_word_adjective = vi
+        .spyOn(faker.word, 'adjective')
+        .mockReturnValue('RANDOM');
+      const spy_word_noun = vi
+        .spyOn(faker.word, 'noun')
+        .mockReturnValue('WORD');
+
+      const domain_word = faker.internet.domainWord();
+
+      expect(domain_word).toBeTruthy();
+      expect(domain_word).toBe('random-word');
+
+      spy_word_adjective.mockRestore();
+      spy_word_noun.mockRestore();
+    });
+
+    describe('when the firstName used contains a apostrophe', () => {
+      it('should remove the apostrophe', () => {
+        const spy_word_adjective = vi
+          .spyOn(faker.word, 'adjective')
+          .mockReturnValue("an'other");
+        const spy_word_noun = vi
+          .spyOn(faker.word, 'noun')
+          .mockReturnValue("no'un");
+
+        const domain_word = faker.internet.domainWord();
+
+        expect(domain_word).toBe('another-noun');
+
+        spy_word_adjective.mockRestore();
+        spy_word_noun.mockRestore();
+      });
+    });
+  });
+
+  describe('protocol()', () => {
+    it('returns a valid protocol', () => {
+      const protocol = faker.internet.protocol();
+      expect(protocol).toBeTruthy();
+    });
+
+    it('should occasionally return http', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockReturnValue(0);
+
+      const protocol = faker.internet.protocol();
+
+      expect(protocol).toBeTruthy();
+      expect(protocol).toBe('http');
+
+      spy_datatype_number.mockRestore();
+    });
+
+    it('should occasionally return https', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockReturnValue(1);
+
+      const protocol = faker.internet.protocol();
+
+      expect(protocol).toBeTruthy();
+      expect(protocol).toBe('https');
+
+      spy_datatype_number.mockRestore();
+    });
+  });
+
+  describe('httpMethod()', () => {
+    it('returns a valid http method', () => {
+      const httpMethods = ['GET', 'POST', 'PUT', 'DELETE', 'PATCH'];
+      const method = faker.internet.httpMethod();
+      expect(httpMethods).toContain(method);
+    });
+  });
+
+  describe('url()', () => {
+    it('returns a valid url', () => {
+      vi.spyOn(faker.internet, 'protocol').mockReturnValue('http');
+      vi.spyOn(faker.internet, 'domainWord').mockReturnValue('bar');
+      vi.spyOn(faker.internet, 'domainSuffix').mockReturnValue('net');
+
+      const url = faker.internet.url();
+
+      expect(url).toBeTruthy();
+      expect(url).toBe('http://bar.net');
+    });
+  });
+
+  describe('ip()', () => {
+    it('returns a random IP address with four parts', () => {
+      const ip = faker.internet.ip();
+      const parts = ip.split('.');
+      expect(parts).toHaveLength(4);
+    });
+  });
+
+  describe('ipv6()', () => {
+    it('returns a random IPv6 address with eight parts', () => {
+      const ip = faker.internet.ipv6();
+      const parts = ip.split(':');
+      expect(parts).toHaveLength(8);
+    });
+  });
+
+  describe('port()', () => {
+    it('returns a random port number', () => {
+      const port = faker.internet.port();
+      expect(Number.isInteger(port)).toBe(true);
+      expect(port).greaterThanOrEqual(0);
+      expect(port).lessThanOrEqual(65535);
+    });
+  });
+
+  describe('userAgent()', () => {
+    it('returns a valid user-agent', () => {
+      const ua = faker.internet.userAgent();
+      expect(ua).toBeTruthy();
+    });
+
+    it('is deterministic', () => {
+      faker.seed(1);
+      const ua1 = faker.internet.userAgent();
+      faker.seed(1);
+      const ua2 = faker.internet.userAgent();
+      expect(ua1).toBe(ua2);
+    });
+  });
+
+  describe('color()', () => {
+    it('returns a valid hex value (like #ffffff)', () => {
+      const color = faker.internet.color(100, 100, 100);
+      expect(color).match(/^#[a-f0-9]{6}$/);
+    });
+  });
+
+  describe('mac()', () => {
+    it('returns a random MAC address with 6 hexadecimal digits', () => {
+      const mac = faker.internet.mac();
+      expect(mac).match(/^([a-f0-9]{2}:){5}[a-f0-9]{2}$/);
+    });
+
+    it('uses the dash separator if we pass it in as our separator', () => {
+      const mac = faker.internet.mac('-');
+      expect(mac).match(/^([a-f0-9]{2}-){5}[a-f0-9]{2}$/);
+    });
+
+    it('uses no separator if we pass in an empty string', () => {
+      const mac = faker.internet.mac('');
+      expect(mac).match(/^[a-f0-9]{12}$/);
+    });
+
+    it('uses the default colon (:) if we provide an unacceptable separator', () => {
+      let mac = faker.internet.mac('!');
+      expect(mac).match(/^([a-f0-9]{2}:){5}[a-f0-9]{2}$/);
+
+      mac = faker.internet.mac('&');
+      expect(mac).match(/^([a-f0-9]{2}:){5}[a-f0-9]{2}$/);
+    });
+  });
+});
diff --git a/test/internet.unit.js b/test/internet.unit.js
deleted file mode 100644
index 12333067..00000000
--- a/test/internet.unit.js
+++ /dev/null
@@ -1,232 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('internet.js', function () {
-  describe('email()', function () {
-    it('returns an email', function () {
-      sinon.stub(faker.internet, 'userName').returns('Aiden.Harann55');
-      var email = faker.internet.email('Aiden.Harann55');
-      var res = email.split('@');
-      res = res[0];
-      assert.strictEqual(res, 'Aiden.Harann55');
-      faker.internet.userName.restore();
-    });
-
-    it('returns an email with japanese characters', function () {
-      sinon.stub(faker.internet, 'userName').returns('思源_唐3');
-      var email = faker.internet.email('思源_唐3');
-      var res = email.split('@');
-      res = res[0];
-      assert.equal(res, '思源_唐3');
-      faker.internet.userName.restore();
-    });
-  });
-
-  describe('exampleEmail', function () {
-    it('returns an email with the correct name', function () {
-      sinon.stub(faker.internet, 'userName').returns('Aiden.Harann55');
-      var email = faker.internet.email('Aiden.Harann55');
-      var res = email.split('@');
-      res = res[0];
-      assert.strictEqual(res, 'Aiden.Harann55');
-      faker.internet.userName.restore();
-    });
-
-    it('uses the example.[org|com|net] host', function () {
-      var email = faker.internet.exampleEmail();
-      assert.ok(email.match(/@example\.(org|com|net)$/));
-    });
-  });
-
-  describe('userName()', function () {
-    it('occasionally returns a single firstName', function () {
-      sinon.stub(faker.datatype, 'number').returns(0);
-      sinon.spy(faker.name, 'firstName');
-      var username = faker.internet.userName();
-
-      assert.ok(username);
-      assert.ok(faker.name.firstName.called);
-
-      faker.datatype.number.restore();
-      faker.name.firstName.restore();
-    });
-
-    it('occasionally returns a firstName with a period or hyphen and a lastName', function () {
-      sinon.stub(faker.datatype, 'number').returns(1);
-      sinon.spy(faker.name, 'firstName');
-      sinon.spy(faker.name, 'lastName');
-      sinon.spy(faker.random, 'arrayElement');
-      var username = faker.internet.userName();
-
-      assert.ok(username);
-      assert.ok(faker.name.firstName.called);
-      assert.ok(faker.name.lastName.called);
-      assert.ok(faker.random.arrayElement.calledWith(['.', '_']));
-
-      faker.datatype.number.restore();
-      faker.name.firstName.restore();
-      faker.name.lastName.restore();
-      faker.random.arrayElement.restore();
-    });
-  });
-
-  describe('domainName()', function () {
-    it('returns a domainWord plus a random suffix', function () {
-      sinon.stub(faker.internet, 'domainWord').returns('bar');
-      sinon.stub(faker.internet, 'domainSuffix').returns('net');
-
-      var domain_name = faker.internet.domainName();
-
-      assert.strictEqual(domain_name, 'bar.net');
-
-      faker.internet.domainWord.restore();
-      faker.internet.domainSuffix.restore();
-    });
-  });
-
-  describe('domainWord()', function () {
-    it('returns a lower-case adjective + noun', function () {
-      sinon.stub(faker.word, 'adjective').returns('RANDOM');
-      sinon.stub(faker.word, 'noun').returns('WORD');
-      var domain_word = faker.internet.domainWord();
-
-      assert.ok(domain_word);
-      assert.strictEqual(domain_word, 'random-word');
-
-      faker.word.adjective.restore();
-      faker.word.noun.restore();
-    });
-    describe('when the firstName used contains a apostrophe', function () {
-      sinon.stub(faker.word, 'adjective').returns("an'other");
-      sinon.stub(faker.word, 'noun').returns("no'un");
-      var domain_word = faker.internet.domainWord();
-
-      it('should remove the apostrophe', function () {
-        assert.strictEqual(domain_word, 'another-noun');
-      });
-
-      faker.word.adjective.restore();
-      faker.word.noun.restore();
-    });
-  });
-
-  describe('protocol()', function () {
-    it('returns a valid protocol', function () {
-      var protocol = faker.internet.protocol();
-      assert.ok(protocol);
-    });
-
-    it('should occasionally return http', function () {
-      sinon.stub(faker.datatype, 'number').returns(0);
-      var protocol = faker.internet.protocol();
-      assert.ok(protocol);
-      assert.strictEqual(protocol, 'http');
-
-      faker.datatype.number.restore();
-    });
-
-    it('should occasionally return https', function () {
-      sinon.stub(faker.datatype, 'number').returns(1);
-      var protocol = faker.internet.protocol();
-      assert.ok(protocol);
-      assert.strictEqual(protocol, 'https');
-
-      faker.datatype.number.restore();
-    });
-  });
-
-  describe('httpMethod()', function () {
-    it('returns a valid http method', function () {
-      var httpMethods = ['GET', 'POST', 'PUT', 'DELETE', 'PATCH'];
-      var method = faker.internet.httpMethod();
-      assert.ok(httpMethods.includes(method));
-    });
-  });
-
-  describe('url()', function () {
-    it('returns a valid url', function () {
-      sinon.stub(faker.internet, 'protocol').returns('http');
-      sinon.stub(faker.internet, 'domainWord').returns('bar');
-      sinon.stub(faker.internet, 'domainSuffix').returns('net');
-
-      var url = faker.internet.url();
-
-      assert.ok(url);
-      assert.strictEqual(url, 'http://bar.net');
-    });
-  });
-
-  describe('ip()', function () {
-    it('returns a random IP address with four parts', function () {
-      var ip = faker.internet.ip();
-      var parts = ip.split('.');
-      assert.strictEqual(parts.length, 4);
-    });
-  });
-
-  describe('ipv6()', function () {
-    it('returns a random IPv6 address with eight parts', function () {
-      var ip = faker.internet.ipv6();
-      var parts = ip.split(':');
-      assert.strictEqual(parts.length, 8);
-    });
-  });
-
-  describe('port()', function () {
-    it('returns a random port number', function () {
-      var port = faker.internet.port();
-      assert.ok(Number.isInteger(port));
-      assert.ok(0 <= port && port <= 65535);
-    });
-  });
-
-  describe('userAgent()', function () {
-    it('returns a valid user-agent', function () {
-      var ua = faker.internet.userAgent();
-      assert.ok(ua);
-    });
-
-    it('is deterministic', function () {
-      faker.seed(1);
-      var ua1 = faker.internet.userAgent();
-      faker.seed(1);
-      var ua2 = faker.internet.userAgent();
-      assert.strictEqual(ua1, ua2);
-    });
-  });
-
-  describe('color()', function () {
-    it('returns a valid hex value (like #ffffff)', function () {
-      var color = faker.internet.color(100, 100, 100);
-      assert.ok(color.match(/^#[a-f0-9]{6}$/));
-    });
-  });
-
-  describe('mac()', function () {
-    it('returns a random MAC address with 6 hexadecimal digits', function () {
-      var mac = faker.internet.mac();
-      assert.ok(mac.match(/^([a-f0-9]{2}:){5}[a-f0-9]{2}$/));
-    });
-
-    it('uses the dash separator if we pass it in as our separator', function () {
-      var mac = faker.internet.mac('-');
-      assert.ok(mac.match(/^([a-f0-9]{2}-){5}[a-f0-9]{2}$/));
-    });
-
-    it('uses no separator if we pass in an empty string', function () {
-      var mac = faker.internet.mac('');
-      assert.ok(mac.match(/^[a-f0-9]{12}$/));
-    });
-
-    it('uses the default colon (:) if we provide an unacceptable separator', function () {
-      var mac = faker.internet.mac('!');
-      assert.ok(mac.match(/^([a-f0-9]{2}:){5}[a-f0-9]{2}$/));
-
-      mac = faker.internet.mac('&');
-      assert.ok(mac.match(/^([a-f0-9]{2}:){5}[a-f0-9]{2}$/));
-    });
-  });
-});
diff --git a/test/locales.spec.ts b/test/locales.spec.ts
new file mode 100644
index 00000000..942d4837
--- /dev/null
+++ b/test/locales.spec.ts
@@ -0,0 +1,15 @@
+import { describe, expect, it } from 'vitest';
+import { faker } from '../lib';
+
+// Remark: actual use of locales functionality is currently tested in all.functional.js test
+
+describe('locale', () => {
+  describe('setLocale()', () => {
+    it('setLocale() changes faker.locale', () => {
+      for (const locale in faker.locales) {
+        faker.setLocale(locale);
+        expect(faker.locale).toBe(locale);
+      }
+    });
+  });
+});
diff --git a/test/locales.unit.js b/test/locales.unit.js
deleted file mode 100644
index d81386fc..00000000
--- a/test/locales.unit.js
+++ /dev/null
@@ -1,20 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-// TODO: make some tests for getting / setting locales
-
-// Remark: actual use of locales functionality is currently tested in all.functional.js test
-
-describe('locale', function () {
-  describe('setLocale()', function () {
-    it('setLocale() changes faker.locale', function () {
-      for (var locale in faker.locales) {
-        faker.setLocale(locale);
-        assert.strictEqual(faker.locale, locale);
-      }
-    });
-  });
-});
diff --git a/test/lorem.unit.js b/test/lorem.spec.ts
index e3c9f0ef..b2f740da 100644
--- a/test/lorem.unit.js
+++ b/test/lorem.spec.ts
@@ -1,94 +1,96 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('lorem.js', function () {
-  describe('word()', function () {
-    context("when no 'length' param passed in", function () {
-      it('returns a word with a random length', function () {
-        var str = faker.lorem.word();
-        assert.ok(typeof str === 'string');
+import type { JestMockCompat } from 'vitest';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+describe('lorem.js', () => {
+  describe('word()', () => {
+    describe("when no 'length' param passed in", () => {
+      it('returns a word with a random length', () => {
+        const str = faker.lorem.word();
+        expect(typeof str).toBe('string');
       });
     });
 
-    context("when 'length' param passed in", function () {
-      it('returns a word with the requested length', function () {
-        var str = faker.lorem.word(5);
-        assert.ok(typeof str === 'string');
-        assert.strictEqual(str.length, 5);
+    describe("when 'length' param passed in", () => {
+      it('returns a word with the requested length', () => {
+        const str = faker.lorem.word(5);
+        expect(typeof str).toBe('string');
+        expect(str).toHaveLength(5);
       });
     });
   });
 
-  describe('words()', function () {
-    beforeEach(function () {
-      sinon.spy(faker.helpers, 'shuffle');
+  describe('words()', () => {
+    let spy_helpers_shuffle: JestMockCompat<[o?: unknown[]], unknown[]>;
+
+    beforeEach(() => {
+      spy_helpers_shuffle = vi.spyOn(faker.helpers, 'shuffle');
     });
 
-    afterEach(function () {
-      faker.helpers.shuffle.restore();
+    afterEach(() => {
+      spy_helpers_shuffle.mockRestore();
     });
 
-    context("when no 'num' param passed in", function () {
-      it('returns three words', function () {
-        var str = faker.lorem.words();
-        var words = str.split(' ');
-        assert.ok(Array.isArray(words));
-        assert.strictEqual(true, words.length >= 3);
+    describe("when no 'num' param passed in", () => {
+      it('returns three words', () => {
+        const str = faker.lorem.words();
+        const words = str.split(' ');
+        expect(Array.isArray(words)).toBe(true);
+        expect(words.length).greaterThanOrEqual(3);
         // assert.ok(faker.helpers.shuffle.called);
       });
     });
 
-    context("when 'num' param passed in", function () {
-      it('returns requested number of words', function () {
-        var str = faker.lorem.words(7);
-        var words = str.split(' ');
-        assert.ok(Array.isArray(words));
-        assert.strictEqual(words.length, 7);
+    describe("when 'num' param passed in", () => {
+      it('returns requested number of words', () => {
+        const str = faker.lorem.words(7);
+        const words = str.split(' ');
+        expect(Array.isArray(words)).toBe(true);
+        expect(words).toHaveLength(7);
       });
     });
   });
 
-  describe('slug()', function () {
-    beforeEach(function () {
-      sinon.spy(faker.helpers, 'shuffle');
+  describe('slug()', () => {
+    let spy_helpers_shuffle: JestMockCompat<[o?: unknown[]], unknown[]>;
+
+    beforeEach(() => {
+      spy_helpers_shuffle = vi.spyOn(faker.helpers, 'shuffle');
     });
 
-    afterEach(function () {
-      faker.helpers.shuffle.restore();
+    afterEach(() => {
+      spy_helpers_shuffle.mockRestore();
     });
 
-    var validateSlug = function (wordCount, str) {
-      assert.strictEqual(1, str.match(/^[a-z][a-z-]*[a-z]$/).length);
-      assert.strictEqual(wordCount - 1, str.match(/-/g).length);
+    const validateSlug = (wordCount, str) => {
+      expect(str.match(/^[a-z][a-z-]*[a-z]$/).length).toBe(1);
+      expect(str.match(/-/g).length).toBe(wordCount - 1);
     };
 
-    context("when no 'wordCount' param passed in", function () {
-      it('returns a slug with three words', function () {
-        var str = faker.lorem.slug();
+    describe("when no 'wordCount' param passed in", () => {
+      it('returns a slug with three words', () => {
+        const str = faker.lorem.slug();
         validateSlug(3, str);
       });
     });
 
-    context("when 'wordCount' param passed in", function () {
-      it('returns a slug with requested number of words', function () {
-        var str = faker.lorem.slug(7);
+    describe("when 'wordCount' param passed in", () => {
+      it('returns a slug with requested number of words', () => {
+        const str = faker.lorem.slug(7);
         validateSlug(7, str);
       });
     });
   });
 
   /*
-    describe("sentence()", function () {
-        context("when no 'wordCount' or 'range' param passed in", function () {
-            it("returns a string of at least three words", function () {
+    describe("sentence()",  () =>{
+        context("when no 'wordCount' or 'range' param passed in",  () =>{
+            it("returns a string of at least three words",  () =>{
                 sinon.spy(faker.lorem, 'words');
                 sinon.stub(faker.random, 'number').returns(2);
-                var sentence = faker.lorem.sentence();
+                const sentence = faker.lorem.sentence();
                 assert.ok(typeof sentence === 'string');
-                var parts = sentence.split(' ');
+                const parts = sentence.split(' ');
                 assert.strictEqual(parts.length, 5); // default 3 plus stubbed 2.
                 assert.ok(faker.lorem.words.calledWith(5));
 
@@ -97,14 +99,14 @@ describe('lorem.js', function () {
             });
         });
 
-        context("when 'wordCount' param passed in", function () {
-            it("returns a string of at least the requested number of words", function () {
+        context("when 'wordCount' param passed in",  () =>{
+            it("returns a string of at least the requested number of words",  () =>{
                 sinon.spy(faker.lorem, 'words');
                 sinon.stub(faker.random, 'number').withArgs(7).returns(2);
-                var sentence = faker.lorem.sentence(10);
+                const sentence = faker.lorem.sentence(10);
 
                 assert.ok(typeof sentence === 'string');
-                var parts = sentence.split(' ');
+                const parts = sentence.split(' ');
                 assert.strictEqual(parts.length, 12); // requested 10 plus stubbed 2.
                 assert.ok(faker.lorem.words.calledWith(12));
 
@@ -113,15 +115,15 @@ describe('lorem.js', function () {
             });
         });
 
-        context("when 'wordCount' and 'range' params passed in", function () {
-            it("returns a string of at least the requested number of words", function () {
+        context("when 'wordCount' and 'range' params passed in",  () =>{
+            it("returns a string of at least the requested number of words",  () =>{
                 sinon.spy(faker.lorem, 'words');
                 sinon.stub(faker.random, 'number').withArgs(4).returns(4);
 
-                var sentence = faker.lorem.sentence(10, 4);
+                const sentence = faker.lorem.sentence(10, 4);
 
                 assert.ok(typeof sentence === 'string');
-                var parts = sentence.split(' ');
+                const parts = sentence.split(' ');
                 assert.strictEqual(parts.length, 14); // requested 10 plus stubbed 4.
                 assert.ok(faker.random.number.calledWith(4)); // random.number should be called with the 'range' we passed.
                 assert.ok(faker.lorem.words.calledWith(14));
@@ -135,14 +137,14 @@ describe('lorem.js', function () {
     });
     */
   /*
-    describe("sentences()", function () {
-        context("when no 'sentenceCount' param passed in", function () {
-            it("returns newline-separated string of three sentences", function () {
+    describe("sentences()",  () =>{
+        context("when no 'sentenceCount' param passed in",  () =>{
+            it("returns newline-separated string of three sentences",  () =>{
                 sinon.spy(faker.lorem, 'sentence');
-                var sentences = faker.lorem.sentences();
+                const sentences = faker.lorem.sentences();
 
                 assert.ok(typeof sentences === 'string');
-                var parts = sentences.split('\n');
+                const parts = sentences.split('\n');
                 assert.strictEqual(parts.length, 3);
                 assert.ok(faker.lorem.sentence.calledThrice);
 
@@ -150,13 +152,13 @@ describe('lorem.js', function () {
             });
         });
 
-        context("when 'sentenceCount' param passed in", function () {
-            it("returns newline-separated string of requested number of sentences", function () {
+        context("when 'sentenceCount' param passed in",  () =>{
+            it("returns newline-separated string of requested number of sentences",  () =>{
                 sinon.spy(faker.lorem, 'sentence');
-                var sentences = faker.lorem.sentences(5);
+                const sentences = faker.lorem.sentences(5);
 
                 assert.ok(typeof sentences === 'string');
-                var parts = sentences.split('\n');
+                const parts = sentences.split('\n');
                 assert.strictEqual(parts.length, 5);
 
                 faker.lorem.sentence.restore();
@@ -165,15 +167,15 @@ describe('lorem.js', function () {
     });
     */
   /*
-    describe("paragraph()", function () {
-        context("when no 'wordCount' param passed in", function () {
-            it("returns a string of at least three sentences", function () {
+    describe("paragraph()",  () =>{
+        context("when no 'wordCount' param passed in",  () =>{
+            it("returns a string of at least three sentences",  () =>{
                 sinon.spy(faker.lorem, 'sentences');
                 sinon.stub(faker.random, 'number').returns(2);
-                var paragraph = faker.lorem.paragraph();
+                const paragraph = faker.lorem.paragraph();
 
                 assert.ok(typeof paragraph === 'string');
-                var parts = paragraph.split('\n');
+                const parts = paragraph.split('\n');
                 assert.strictEqual(parts.length, 5); // default 3 plus stubbed 2.
                 assert.ok(faker.lorem.sentences.calledWith(5));
 
@@ -182,14 +184,14 @@ describe('lorem.js', function () {
             });
         });
 
-        context("when 'wordCount' param passed in", function () {
-            it("returns a string of at least the requested number of sentences", function () {
+        context("when 'wordCount' param passed in",  () =>{
+            it("returns a string of at least the requested number of sentences",  () =>{
                 sinon.spy(faker.lorem, 'sentences');
                 sinon.stub(faker.random, 'number').returns(2);
-                var paragraph = faker.lorem.paragraph(10);
+                const paragraph = faker.lorem.paragraph(10);
 
                 assert.ok(typeof paragraph === 'string');
-                var parts = paragraph.split('\n');
+                const parts = paragraph.split('\n');
                 assert.strictEqual(parts.length, 12); // requested 10 plus stubbed 2.
                 assert.ok(faker.lorem.sentences.calledWith(12));
 
@@ -202,14 +204,14 @@ describe('lorem.js', function () {
 
   /*
 
-    describe("paragraphs()", function () {
-        context("when no 'paragraphCount' param passed in", function () {
-            it("returns newline-separated string of three paragraphs", function () {
+    describe("paragraphs()",  () =>{
+        context("when no 'paragraphCount' param passed in",  () =>{
+            it("returns newline-separated string of three paragraphs",  () =>{
                 sinon.spy(faker.lorem, 'paragraph');
-                var paragraphs = faker.lorem.paragraphs();
+                const paragraphs = faker.lorem.paragraphs();
 
                 assert.ok(typeof paragraphs === 'string');
-                var parts = paragraphs.split('\n \r');
+                const parts = paragraphs.split('\n \r');
                 assert.strictEqual(parts.length, 3);
                 assert.ok(faker.lorem.paragraph.calledThrice);
 
@@ -217,13 +219,13 @@ describe('lorem.js', function () {
             });
         });
 
-        context("when 'paragraphCount' param passed in", function () {
-            it("returns newline-separated string of requested number of paragraphs", function () {
+        context("when 'paragraphCount' param passed in",  () =>{
+            it("returns newline-separated string of requested number of paragraphs",  () =>{
                 sinon.spy(faker.lorem, 'paragraph');
-                var paragraphs = faker.lorem.paragraphs(5);
+                const paragraphs = faker.lorem.paragraphs(5);
 
                 assert.ok(typeof paragraphs === 'string');
-                var parts = paragraphs.split('\n \r');
+                const parts = paragraphs.split('\n \r');
                 assert.strictEqual(parts.length, 5);
 
                 faker.lorem.paragraph.restore();
diff --git a/test/mocha.opts b/test/mocha.opts
deleted file mode 100644
index 2fc3747d..00000000
--- a/test/mocha.opts
+++ /dev/null
@@ -1,5 +0,0 @@
---reporter spec
---ui bdd
---globals state,newBlocks,params,type,__coverage__
---timeout 6500
---slow 200
diff --git a/test/music.spec.ts b/test/music.spec.ts
new file mode 100644
index 00000000..a2351dfd
--- /dev/null
+++ b/test/music.spec.ts
@@ -0,0 +1,14 @@
+import { describe, expect, it } from 'vitest';
+import { faker } from '../lib';
+
+faker.seed(1234);
+
+describe('music', () => {
+  describe('genre()', () => {
+    it('returns a genre', () => {
+      const genre = faker.music.genre();
+
+      expect(genre).toBe('Electronic');
+    });
+  });
+});
diff --git a/test/music.unit.js b/test/music.unit.js
deleted file mode 100644
index e7d1d97b..00000000
--- a/test/music.unit.js
+++ /dev/null
@@ -1,17 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('music.js', function () {
-  describe('genre()', function () {
-    it('returns a genre', function () {
-      sinon.stub(faker.music, 'genre').returns('Rock');
-      var genre = faker.music.genre();
-
-      assert.strictEqual(genre, 'Rock');
-      faker.music.genre.restore();
-    });
-  });
-});
diff --git a/test/name.spec.ts b/test/name.spec.ts
new file mode 100644
index 00000000..b8f30ab2
--- /dev/null
+++ b/test/name.spec.ts
@@ -0,0 +1,335 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+function assertInArray<T>(value: T, array: readonly T[]): void {
+  const idx = array.indexOf(value);
+  expect(idx).not.toBe(-1);
+}
+
+describe('name', () => {
+  describe('firstName()', () => {
+    it('returns a random name', () => {
+      const spy_name_firstName = vi
+        .spyOn(faker.name, 'firstName')
+        .mockReturnValue('foo');
+
+      const first_name = faker.name.firstName();
+
+      expect(first_name).toBe('foo');
+
+      spy_name_firstName.mockRestore();
+    });
+
+    it('returns a gender-specific name when passed a number', () => {
+      for (let q = 0; q < 30; q++) {
+        const gender = Math.floor(Math.random() * 2);
+        const name = faker.name.firstName(gender);
+        if (gender === 0) {
+          assertInArray(name, faker.definitions.name.male_first_name);
+        } else {
+          assertInArray(name, faker.definitions.name.female_first_name);
+        }
+      }
+    });
+
+    it('returns a gender-specific name when passed a string', () => {
+      for (let q = 0; q < 30; q++) {
+        const gender = Math.floor(Math.random() * 2);
+        const genderString = gender === 0 ? 'male' : 'female';
+        const name = faker.name.firstName(genderString);
+        assertInArray(
+          name,
+          faker.definitions.name[genderString + '_first_name']
+        );
+      }
+    });
+  });
+
+  describe('lastName()', () => {
+    it('returns a random name', () => {
+      const spy_name_lastName = vi
+        .spyOn(faker.name, 'lastName')
+        .mockReturnValue('foo');
+
+      const last_name = faker.name.lastName();
+
+      expect(last_name).toBe('foo');
+
+      spy_name_lastName.mockRestore();
+    });
+  });
+
+  describe('middleName()', () => {
+    it('returns a random middle name', () => {
+      const spy_name_middleName = vi
+        .spyOn(faker.name, 'middleName')
+        .mockReturnValue('foo');
+
+      const middle_name = faker.name.middleName();
+
+      expect(middle_name).toBe('foo');
+
+      spy_name_middleName.mockRestore();
+    });
+
+    describe('when using a locale with gender specific middle names', () => {
+      let oldLocale: string;
+
+      beforeEach(() => {
+        oldLocale = faker.locale;
+        faker.locale = 'TEST';
+
+        // @ts-expect-error
+        faker.locales.TEST = {
+          name: {
+            male_middle_name: ['Genaddiesvich'],
+            female_middle_name: ['Genaddievna'],
+          },
+        };
+      });
+
+      afterEach(() => {
+        faker.locale = oldLocale;
+        // @ts-expect-error
+        delete faker.locale.TEST;
+      });
+
+      it('returns male prefix', () => {
+        const middle_name = faker.name.middleName(0);
+
+        expect(middle_name).toBe('Genaddiesvich');
+      });
+
+      it('returns female prefix', () => {
+        const middle_name = faker.name.middleName(1);
+
+        expect(middle_name).toBe('Genaddievna');
+      });
+    });
+  });
+
+  describe('findName()', () => {
+    it('usually returns a first name and last name', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockReturnValue(5);
+
+      const name = faker.name.findName();
+
+      expect(name).toBeTruthy();
+
+      const parts = name.split(' ');
+
+      expect(parts).toHaveLength(2);
+
+      spy_datatype_number.mockRestore();
+    });
+
+    it('occasionally returns a first name and last name with a prefix', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockReturnValue(0);
+
+      const name = faker.name.findName();
+      const parts = name.split(' ');
+
+      expect(parts.length).greaterThanOrEqual(3);
+
+      spy_datatype_number.mockRestore();
+    });
+
+    it('occasionally returns a male full name with a prefix', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockImplementation((opt) =>
+          opt === 8
+            ? 0 // with prefix
+            : opt === 1
+            ? 0 // gender male
+            : undefined
+        );
+
+      const spy_name_prefix = vi
+        .spyOn(faker.name, 'prefix')
+        .mockImplementation((arg) => (arg === 0 ? 'X' : undefined));
+      const spy_name_firstName = vi
+        .spyOn(faker.name, 'firstName')
+        .mockImplementation((arg) => (arg === 0 ? 'Y' : undefined));
+      const spy_name_lastName = vi
+        .spyOn(faker.name, 'lastName')
+        .mockImplementation((arg) => (arg === 0 ? 'Z' : undefined));
+
+      const name = faker.name.findName();
+
+      expect(name).toBe('X Y Z');
+
+      spy_datatype_number.mockRestore();
+      spy_name_prefix.mockRestore();
+      spy_name_firstName.mockRestore();
+      spy_name_lastName.mockRestore();
+    });
+
+    it('occasionally returns a female full name with a prefix', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockImplementation((opt) =>
+          opt === 8
+            ? 0 // with prefix
+            : opt === 1
+            ? 1 // gender female
+            : undefined
+        );
+
+      const spy_name_prefix = vi
+        .spyOn(faker.name, 'prefix')
+        .mockImplementation((arg) => (arg === 1 ? 'J' : undefined));
+      const spy_name_firstName = vi
+        .spyOn(faker.name, 'firstName')
+        .mockImplementation((arg) => (arg === 1 ? 'K' : undefined));
+      const spy_name_lastName = vi
+        .spyOn(faker.name, 'lastName')
+        .mockImplementation((arg) => (arg === 1 ? 'L' : undefined));
+
+      const name = faker.name.findName();
+
+      expect(name).toBe('J K L');
+
+      spy_datatype_number.mockRestore();
+      spy_name_prefix.mockRestore();
+      spy_name_firstName.mockRestore();
+      spy_name_lastName.mockRestore();
+    });
+
+    it('occasionally returns a first name and last name with a suffix', () => {
+      const spy_datatype_number = vi
+        .spyOn(faker.datatype, 'number')
+        .mockReturnValue(1);
+      const spy_name_suffix = vi
+        .spyOn(faker.name, 'suffix')
+        .mockReturnValue('Jr.');
+
+      const name = faker.name.findName();
+      const parts = name.split(' ');
+
+      expect(parts.length).greaterThanOrEqual(3);
+      expect(parts[parts.length - 1]).toBe('Jr.');
+
+      spy_name_suffix.mockRestore();
+      spy_datatype_number.mockRestore();
+    });
+
+    it.todo(
+      'needs to work with specific locales and respect the fallbacks',
+      () => {
+        faker.locale = 'en_US';
+        // this will throw if this is broken
+        const name = faker.name.findName();
+        // TODO @Shinigami92 2022-01-20: This test doesn't check anything
+      }
+    );
+  });
+
+  describe('title()', () => {
+    it('returns a random title', () => {
+      const spy_name_title = vi
+        .spyOn(faker.name, 'title')
+        .mockReturnValue('Lead Solutions Supervisor');
+
+      const title = faker.name.title();
+
+      expect(title).toBe('Lead Solutions Supervisor');
+
+      spy_name_title.mockRestore();
+    });
+  });
+
+  describe('jobTitle()', () => {
+    it('returns a job title consisting of a descriptor, area, and type', () => {
+      const spy_random_arrayElement = vi.spyOn(faker.random, 'arrayElement');
+      const spy_name_jobDescriptor = vi.spyOn(faker.name, 'jobDescriptor');
+      const spy_name_jobArea = vi.spyOn(faker.name, 'jobArea');
+      const spy_name_jobType = vi.spyOn(faker.name, 'jobType');
+
+      const jobTitle = faker.name.jobTitle();
+
+      expect(typeof jobTitle).toBe('string');
+      expect(spy_random_arrayElement).toHaveBeenCalledTimes(3);
+      expect(spy_name_jobDescriptor).toHaveBeenCalledOnce();
+      expect(spy_name_jobArea).toHaveBeenCalledOnce();
+      expect(spy_name_jobType).toHaveBeenCalledOnce();
+
+      spy_random_arrayElement.mockRestore();
+      spy_name_jobDescriptor.mockRestore();
+      spy_name_jobArea.mockRestore();
+      spy_name_jobType.mockRestore();
+    });
+  });
+
+  describe('prefix()', () => {
+    describe('when using a locale with gender specific name prefixes', () => {
+      let oldLocale: string;
+
+      beforeEach(() => {
+        oldLocale = faker.locale;
+        faker.locale = 'TEST';
+
+        // @ts-expect-error
+        faker.locales.TEST = {
+          name: {
+            male_prefix: ['Mp'],
+            female_prefix: ['Fp'],
+          },
+        };
+      });
+
+      afterEach(() => {
+        faker.locale = oldLocale;
+        // @ts-expect-error
+        delete faker.locale.TEST;
+      });
+
+      it('returns male prefix', () => {
+        const prefix = faker.name.prefix(0);
+        expect(prefix).toBe('Mp');
+      });
+
+      it('returns female prefix', () => {
+        const prefix = faker.name.prefix(1);
+        expect(prefix).toBe('Fp');
+      });
+
+      it('returns either prefix', () => {
+        const prefix = faker.name.prefix();
+        expect(['Mp', 'Fp']).toContain(prefix);
+      });
+    });
+
+    describe('when using a locale without gender specific name prefixes', () => {
+      let oldLocale: string;
+
+      beforeEach(() => {
+        oldLocale = faker.locale;
+        faker.locale = 'TEST';
+
+        // @ts-expect-error
+        faker.locales.TEST = {
+          name: {
+            prefix: ['P'],
+          },
+        };
+      });
+
+      afterEach(() => {
+        faker.locale = oldLocale;
+        // @ts-expect-error
+        delete faker.locale.TEST;
+      });
+
+      it('returns a prefix', () => {
+        const prefix = faker.name.prefix();
+
+        expect(prefix).toBe('P');
+      });
+    });
+  });
+});
diff --git a/test/name.unit.js b/test/name.unit.js
deleted file mode 100644
index 040cac47..00000000
--- a/test/name.unit.js
+++ /dev/null
@@ -1,282 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-function assertInArray(value, array) {
-  var idx = array.indexOf(value);
-  assert.notEqual(idx, -1);
-}
-
-describe('name.js', function () {
-  describe('firstName()', function () {
-    it('returns a random name', function () {
-      sinon.stub(faker.name, 'firstName').returns('foo');
-      var first_name = faker.name.firstName();
-
-      assert.strictEqual(first_name, 'foo');
-
-      faker.name.firstName.restore();
-    });
-
-    it('returns a gender-specific name when passed a number', function () {
-      for (var q = 0; q < 30; q++) {
-        var gender = Math.floor(Math.random() * 2);
-        var name = faker.name.firstName(gender);
-        if (gender === 0) {
-          assertInArray(name, faker.definitions.name.male_first_name);
-        } else {
-          assertInArray(name, faker.definitions.name.female_first_name);
-        }
-      }
-    });
-
-    it('returns a gender-specific name when passed a string', function () {
-      for (var q = 0; q < 30; q++) {
-        var gender = Math.floor(Math.random() * 2);
-        var genderString = gender === 0 ? 'male' : 'female';
-        var name = faker.name.firstName(genderString);
-        assertInArray(
-          name,
-          faker.definitions.name[genderString + '_first_name']
-        );
-      }
-    });
-  });
-
-  describe('lastName()', function () {
-    it('returns a random name', function () {
-      sinon.stub(faker.name, 'lastName').returns('foo');
-
-      var last_name = faker.name.lastName();
-
-      assert.strictEqual(last_name, 'foo');
-
-      faker.name.lastName.restore();
-    });
-  });
-
-  describe('middleName()', function () {
-    it('returns a random middle name', function () {
-      sinon.stub(faker.name, 'middleName').returns('foo');
-
-      var middle_name = faker.name.middleName();
-
-      assert.strictEqual(middle_name, 'foo');
-
-      faker.name.middleName.restore();
-    });
-
-    describe('when using a locale with gender specific middle names', function () {
-      beforeEach(function () {
-        this.oldLocale = faker.locale;
-        faker.locale = 'TEST';
-
-        faker.locales['TEST'] = {
-          name: {
-            male_middle_name: ['Genaddiesvich'],
-            female_middle_name: ['Genaddievna'],
-          },
-        };
-      });
-
-      afterEach(function () {
-        faker.locale = this.oldLocale;
-        delete faker.locale['TEST'];
-      });
-
-      it('returns male prefix', function () {
-        var middle_name = faker.name.middleName(0);
-
-        assert.strictEqual(middle_name, 'Genaddiesvich');
-      });
-
-      it('returns female prefix', function () {
-        var middle_name = faker.name.middleName(1);
-
-        assert.strictEqual(middle_name, 'Genaddievna');
-      });
-    });
-  });
-
-  describe('findName()', function () {
-    it('usually returns a first name and last name', function () {
-      sinon.stub(faker.datatype, 'number').returns(5);
-      var name = faker.name.findName();
-      assert.ok(name);
-      var parts = name.split(' ');
-
-      assert.strictEqual(parts.length, 2);
-
-      faker.datatype.number.restore();
-    });
-
-    it('occasionally returns a first name and last name with a prefix', function () {
-      sinon.stub(faker.datatype, 'number').returns(0);
-      var name = faker.name.findName();
-      var parts = name.split(' ');
-
-      assert.ok(parts.length >= 3);
-
-      faker.datatype.number.restore();
-    });
-
-    it('occasionally returns a male full name with a prefix', function () {
-      sinon
-        .stub(faker.datatype, 'number')
-        .withArgs(8)
-        .returns(0) // with prefix
-        .withArgs(1)
-        .returns(0); // gender male
-
-      sinon.stub(faker.name, 'prefix').withArgs(0).returns('X');
-      sinon.stub(faker.name, 'firstName').withArgs(0).returns('Y');
-      sinon.stub(faker.name, 'lastName').withArgs(0).returns('Z');
-
-      var name = faker.name.findName();
-
-      assert.strictEqual(name, 'X Y Z');
-
-      faker.datatype.number.restore();
-      faker.name.prefix.restore();
-      faker.name.firstName.restore();
-      faker.name.lastName.restore();
-    });
-
-    it('occasionally returns a female full name with a prefix', function () {
-      sinon
-        .stub(faker.datatype, 'number')
-        .withArgs(8)
-        .returns(0) // with prefix
-        .withArgs(1)
-        .returns(1); // gender female
-
-      sinon.stub(faker.name, 'prefix').withArgs(1).returns('J');
-      sinon.stub(faker.name, 'firstName').withArgs(1).returns('K');
-      sinon.stub(faker.name, 'lastName').withArgs(1).returns('L');
-
-      var name = faker.name.findName();
-
-      assert.strictEqual(name, 'J K L');
-
-      faker.datatype.number.restore();
-      faker.name.prefix.restore();
-      faker.name.firstName.restore();
-      faker.name.lastName.restore();
-    });
-
-    it('occasionally returns a first name and last name with a suffix', function () {
-      sinon.stub(faker.datatype, 'number').returns(1);
-      sinon.stub(faker.name, 'suffix').returns('Jr.');
-      var name = faker.name.findName();
-      var parts = name.split(' ');
-
-      assert.ok(parts.length >= 3);
-      assert.strictEqual(parts[parts.length - 1], 'Jr.');
-
-      faker.name.suffix.restore();
-      faker.datatype.number.restore();
-    });
-
-    it('needs to work with specific locales and respect the fallbacks', function () {
-      faker.locale = 'en_US';
-      // this will throw if this is broken
-      var name = faker.name.findName();
-    });
-  });
-
-  describe('title()', function () {
-    it('returns a random title', function () {
-      sinon.stub(faker.name, 'title').returns('Lead Solutions Supervisor');
-
-      var title = faker.name.title();
-
-      assert.strictEqual(title, 'Lead Solutions Supervisor');
-
-      faker.name.title.restore();
-    });
-  });
-
-  describe('jobTitle()', function () {
-    it('returns a job title consisting of a descriptor, area, and type', function () {
-      sinon.spy(faker.random, 'arrayElement');
-      sinon.spy(faker.name, 'jobDescriptor');
-      sinon.spy(faker.name, 'jobArea');
-      sinon.spy(faker.name, 'jobType');
-      var jobTitle = faker.name.jobTitle();
-
-      assert.ok(typeof jobTitle === 'string');
-      assert.ok(faker.random.arrayElement.calledThrice);
-      assert.ok(faker.name.jobDescriptor.calledOnce);
-      assert.ok(faker.name.jobArea.calledOnce);
-      assert.ok(faker.name.jobType.calledOnce);
-
-      faker.random.arrayElement.restore();
-      faker.name.jobDescriptor.restore();
-      faker.name.jobArea.restore();
-      faker.name.jobType.restore();
-    });
-  });
-
-  describe('prefix()', function () {
-    describe('when using a locale with gender specific name prefixes', function () {
-      beforeEach(function () {
-        this.oldLocale = faker.locale;
-        faker.locale = 'TEST';
-
-        faker.locales['TEST'] = {
-          name: {
-            male_prefix: ['Mp'],
-            female_prefix: ['Fp'],
-          },
-        };
-      });
-
-      afterEach(function () {
-        faker.locale = this.oldLocale;
-        delete faker.locale['TEST'];
-      });
-
-      it('returns male prefix', function () {
-        var prefix = faker.name.prefix(0);
-        assert.strictEqual(prefix, 'Mp');
-      });
-
-      it('returns female prefix', function () {
-        var prefix = faker.name.prefix(1);
-
-        assert.strictEqual(prefix, 'Fp');
-      });
-
-      it('returns either prefix', function () {
-        var prefix = faker.name.prefix();
-        assert(['Mp', 'Fp'].indexOf(prefix) >= 0);
-      });
-    });
-
-    describe('when using a locale without gender specific name prefixes', function () {
-      beforeEach(function () {
-        this.oldLocale = faker.locale;
-        faker.locale = 'TEST';
-
-        faker.locales['TEST'] = {
-          name: {
-            prefix: ['P'],
-          },
-        };
-      });
-
-      afterEach(function () {
-        faker.locale = this.oldLocale;
-        delete faker.locale['TEST'];
-      });
-
-      it('returns a prefix', function () {
-        var prefix = faker.name.prefix();
-
-        assert.strictEqual(prefix, 'P');
-      });
-    });
-  });
-});
diff --git a/test/phone_number.spec.ts b/test/phone_number.spec.ts
new file mode 100644
index 00000000..2aef409c
--- /dev/null
+++ b/test/phone_number.spec.ts
@@ -0,0 +1,47 @@
+import { describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+describe('phone_number.js', () => {
+  describe('phoneNumber()', () => {
+    it('returns a random phoneNumber with a random format', () => {
+      const spy_helpers_replaceSymbolWithNumber = vi.spyOn(
+        faker.helpers,
+        'replaceSymbolWithNumber'
+      );
+
+      const phone_number = faker.phone.phoneNumber();
+
+      expect(phone_number).match(/\d/);
+      expect(spy_helpers_replaceSymbolWithNumber).toHaveBeenCalled();
+
+      spy_helpers_replaceSymbolWithNumber.mockRestore();
+    });
+  });
+
+  describe('phoneNumberFormat()', () => {
+    it('returns phone number with requested format (Array index)', () => {
+      faker.locale = 'en';
+      for (let i = 0; i < 10; i++) {
+        const phone_number = faker.phone.phoneNumberFormat(1);
+        expect(phone_number).match(/\(\d\d\d\) \d\d\d-\d\d\d\d/);
+      }
+    });
+
+    it('returns phone number with proper format US (Array index)', () => {
+      faker.locale = 'en';
+      for (let i = 0; i < 25; i++) {
+        const phone_number = faker.phone.phoneNumberFormat(1);
+        console.log(phone_number);
+        expect(phone_number).match(/\([2-9]\d\d\) [2-9]\d\d-\d\d\d\d/);
+      }
+    });
+
+    it('returns phone number with proper format CA (Array index)', () => {
+      faker.locale = 'en_CA';
+      for (let i = 0; i < 25; i++) {
+        const phone_number = faker.phone.phoneNumberFormat(1);
+        expect(phone_number).match(/\([2-9]\d\d\)[2-9]\d\d-\d\d\d\d/);
+      }
+    });
+  });
+});
diff --git a/test/phone_number.unit.js b/test/phone_number.unit.js
deleted file mode 100644
index 7cb3af41..00000000
--- a/test/phone_number.unit.js
+++ /dev/null
@@ -1,46 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('phone_number.js', function () {
-  describe('phoneNumber()', function () {
-    it('returns a random phoneNumber with a random format', function () {
-      sinon.spy(faker.helpers, 'replaceSymbolWithNumber');
-      var phone_number = faker.phone.phoneNumber();
-
-      assert.ok(phone_number.match(/\d/));
-      assert.ok(faker.helpers.replaceSymbolWithNumber.called);
-
-      faker.helpers.replaceSymbolWithNumber.restore();
-    });
-  });
-
-  describe('phoneNumberFormat()', function () {
-    it('returns phone number with requested format (Array index)', function () {
-      faker.locale = 'en';
-      for (var i = 0; i < 10; i++) {
-        var phone_number = faker.phone.phoneNumberFormat(1);
-        assert.ok(phone_number.match(/\(\d\d\d\) \d\d\d-\d\d\d\d/));
-      }
-    });
-
-    it('returns phone number with proper format US (Array index)', function () {
-      faker.locale = 'en';
-      for (var i = 0; i < 25; i++) {
-        var phone_number = faker.phone.phoneNumberFormat(1);
-        console.log(phone_number);
-        assert.ok(phone_number.match(/\([2-9]\d\d\) [2-9]\d\d-\d\d\d\d/));
-      }
-    });
-
-    it('returns phone number with proper format CA (Array index)', function () {
-      faker.locale = 'en_CA';
-      for (var i = 0; i < 25; i++) {
-        var phone_number = faker.phone.phoneNumberFormat(1);
-        assert.ok(phone_number.match(/\([2-9]\d\d\)[2-9]\d\d-\d\d\d\d/));
-      }
-    });
-  });
-});
diff --git a/test/random.spec.ts b/test/random.spec.ts
new file mode 100644
index 00000000..f2e17a7e
--- /dev/null
+++ b/test/random.spec.ts
@@ -0,0 +1,259 @@
+import { describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+import { Mersenne } from '../lib/mersenne';
+
+const mersenne = new Mersenne();
+
+describe('random.js', () => {
+  describe('number', () => {
+    it('random.number() uses datatype module and prints deprecation warning', () => {
+      const spy_console_log = vi.spyOn(console, 'log');
+      const spy_datatype_number = vi.spyOn(faker.datatype, 'number');
+      faker.random.number();
+      expect(spy_datatype_number).toHaveBeenCalled();
+      expect(spy_console_log).toHaveBeenCalledWith(
+        'Deprecation Warning: faker.random.number is now located in faker.datatype.number'
+      );
+      spy_datatype_number.mockRestore();
+      spy_console_log.mockRestore();
+    });
+
+    it('should return deterministic results when seeded with integer', () => {
+      faker.seed(100);
+      const name = faker.name.findName();
+      expect(name).toBe('Eva Jenkins');
+    });
+
+    it('should return deterministic results when seeded with 0', () => {
+      faker.seed(0);
+      const name = faker.name.findName();
+      expect(name).toBe('Lola Sporer');
+    });
+
+    it('should return deterministic results when seeded with array - one element', () => {
+      faker.seed([10]);
+      const name = faker.name.findName();
+      expect(name).toBe('Duane Kshlerin');
+    });
+
+    it('should return deterministic results when seeded with array - multiple elements', () => {
+      faker.seed([10, 100, 1000]);
+      const name = faker.name.findName();
+      expect(name).toBe('Alma Shanahan');
+    });
+  });
+
+  describe('float', () => {
+    it('random.float() uses datatype module and prints deprecation warning', () => {
+      const spy_console_log = vi.spyOn(console, 'log');
+      const spy_datatype_float = vi.spyOn(faker.datatype, 'float');
+      faker.random.float();
+      expect(spy_datatype_float).toHaveBeenCalled();
+      expect(spy_console_log).toHaveBeenCalledWith(
+        'Deprecation Warning: faker.random.float is now located in faker.datatype.float'
+      );
+      spy_datatype_float.mockRestore();
+      spy_console_log.mockRestore();
+    });
+  });
+
+  describe('arrayElement', () => {
+    it('returns a random element in the array', () => {
+      const testArray = ['hello', 'to', 'you', 'my', 'friend'];
+      expect(
+        testArray.indexOf(faker.random.arrayElement(testArray))
+      ).greaterThan(-1);
+    });
+
+    it('returns a random element in the array when there is only 1', () => {
+      const testArray = ['hello'];
+      expect(
+        testArray.indexOf(faker.random.arrayElement(testArray))
+      ).greaterThan(-1);
+    });
+  });
+
+  describe('arrayElements', () => {
+    it('returns a subset with random elements in the array', () => {
+      const testArray = ['hello', 'to', 'you', 'my', 'friend'];
+      const subset = faker.random.arrayElements(testArray);
+
+      // Check length
+      expect(subset.length).greaterThanOrEqual(1);
+      expect(subset.length).lessThanOrEqual(testArray.length);
+
+      // Check elements
+      subset.forEach((element) => {
+        expect(testArray).toContain(element);
+      });
+
+      // Check uniqueness
+      subset.forEach((element) => {
+        expect(!Object.hasOwnProperty(element)).toBe(true);
+        subset[element] = true;
+      }, {});
+    });
+
+    it('returns a subset of fixed length with random elements in the array', () => {
+      const testArray = ['hello', 'to', 'you', 'my', 'friend'];
+      const subset = faker.random.arrayElements(testArray, 3);
+
+      // Check length
+      expect(subset).toHaveLength(3);
+
+      // Check elements
+      subset.forEach((element) => {
+        expect(testArray).toContain(element);
+      });
+
+      // Check uniqueness
+      subset.forEach((element) => {
+        expect(!Object.hasOwnProperty(element)).toBe(true);
+        subset[element] = true;
+      }, {});
+    });
+  });
+
+  describe('UUID', () => {
+    it('random.uuid() uses datatype module and prints deprecation warning', () => {
+      const spy_console_log = vi.spyOn(console, 'log');
+      const spy_datatype_uuid = vi.spyOn(faker.datatype, 'uuid');
+      faker.random.uuid();
+      expect(spy_datatype_uuid).toHaveBeenCalled();
+      expect(spy_console_log).toHaveBeenCalledWith(
+        'Deprecation Warning: faker.random.uuid is now located in faker.datatype.uuid'
+      );
+      spy_datatype_uuid.mockRestore();
+      spy_console_log.mockRestore();
+    });
+  });
+
+  describe('boolean', () => {
+    it('random.boolean() uses datatype module and prints deprecation warning', () => {
+      const spy_console_log = vi.spyOn(console, 'log');
+      const spy_datatype_boolean = vi.spyOn(faker.datatype, 'boolean');
+      faker.random.boolean();
+      expect(spy_datatype_boolean).toHaveBeenCalled();
+      expect(spy_console_log).toHaveBeenCalledWith(
+        'Deprecation Warning: faker.random.boolean is now located in faker.datatype.boolean'
+      );
+      spy_datatype_boolean.mockRestore();
+      spy_console_log.mockRestore();
+    });
+  });
+
+  describe('semver', () => {
+    const semver = faker.system.semver();
+
+    it('should generate a string', () => {
+      expect(typeof semver).toBe('string');
+    });
+
+    it('should generate a valid semver', () => {
+      expect(semver).match(/^\d+\.\d+\.\d+$/);
+    });
+  });
+
+  describe('alpha', () => {
+    const alpha = faker.random.alpha;
+
+    it('should return single letter when no count provided', () => {
+      expect(alpha()).toHaveLength(1);
+    });
+
+    it('should return lowercase letter when no upcase option provided', () => {
+      expect(alpha()).match(/[a-z]/);
+    });
+
+    it('should return uppercase when upcase option is true', () => {
+      expect(
+        alpha(
+          // @ts-expect-error
+          { upcase: true }
+        )
+      ).match(/[A-Z]/);
+    });
+
+    it('should generate many random letters', () => {
+      expect(alpha(5)).toHaveLength(5);
+    });
+
+    it('should be able to ban some characters', () => {
+      const alphaText = alpha(
+        5,
+        // @ts-expect-error
+        { bannedChars: ['a', 'p'] }
+      );
+      expect(alphaText).toHaveLength(5);
+      expect(alphaText).match(/[b-oq-z]/);
+    });
+    it('should be able handle mistake in banned characters array', () => {
+      const alphaText = alpha(
+        5,
+        // @ts-expect-error
+        { bannedChars: ['a', 'a', 'p'] }
+      );
+      expect(alphaText).toHaveLength(5);
+      expect(alphaText).match(/[b-oq-z]/);
+    });
+  });
+
+  describe('alphaNumeric', () => {
+    const alphaNumeric = faker.random.alphaNumeric;
+
+    it('should generate single character when no additional argument was provided', () => {
+      expect(alphaNumeric()).toHaveLength(1);
+    });
+
+    it('should generate many random characters', () => {
+      expect(alphaNumeric(5)).toHaveLength(5);
+    });
+
+    it('should be able to ban some characters', () => {
+      const alphaText = alphaNumeric(5, { bannedChars: ['a', 'p'] });
+      expect(alphaText).toHaveLength(5);
+      expect(alphaText).match(/[b-oq-z]/);
+    });
+    it('should be able handle mistake in banned characters array', () => {
+      const alphaText = alphaNumeric(5, { bannedChars: ['a', 'p', 'a'] });
+      expect(alphaText).toHaveLength(5);
+      expect(alphaText).match(/[b-oq-z]/);
+    });
+  });
+
+  describe('hexaDecimal', () => {
+    it('random.hexaDecimal() uses datatype module and prints deprecation warning', () => {
+      const spy_console_log = vi.spyOn(console, 'log');
+      const spy_datatype_hexaDecimal = vi.spyOn(faker.datatype, 'hexaDecimal');
+      faker.random.hexaDecimal();
+      expect(spy_datatype_hexaDecimal).toHaveBeenCalled();
+      expect(spy_console_log).toHaveBeenCalledWith(
+        'Deprecation Warning: faker.random.hexaDecimal is now located in faker.datatype.hexaDecimal'
+      );
+      spy_datatype_hexaDecimal.mockRestore();
+      spy_console_log.mockRestore();
+    });
+  });
+
+  describe('mersenne twister', () => {
+    it('returns a random number without given min / max arguments', () => {
+      const randomNumber = mersenne.rand();
+      expect(typeof randomNumber).toBe('number');
+    });
+
+    it('throws an error when attempting to seed() a non-integer', () => {
+      expect(() =>
+        mersenne.seed(
+          // @ts-expect-error
+          'abc'
+        )
+      ).toThrowError(Error('seed(S) must take numeric argument; is string'));
+    });
+
+    it('throws an error when attempting to seed() a non-integer', () => {
+      expect(() => mersenne.seed_array('abc')).toThrowError(
+        Error('seed_array(A) must take array of numbers; is string')
+      );
+    });
+  });
+});
diff --git a/test/random.unit.js b/test/random.unit.js
deleted file mode 100644
index c57a8dbc..00000000
--- a/test/random.unit.js
+++ /dev/null
@@ -1,251 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var _ = require('lodash');
-  var faker = require('../lib').faker;
-  var mersenne = new (require('../lib/mersenne').Mersenne)();
-}
-
-describe('random.js', function () {
-  describe('number', function () {
-    it('random.number() uses datatype module and prints deprecation warning', function () {
-      sinon.spy(console, 'log');
-      sinon.spy(faker.datatype, 'number');
-      faker.random.number();
-      assert.ok(faker.datatype.number.called);
-      assert.ok(
-        console.log.calledWith(
-          'Deprecation Warning: faker.random.number is now located in faker.datatype.number'
-        )
-      );
-      faker.datatype.number.restore();
-      console.log.restore();
-    });
-
-    it('should return deterministic results when seeded with integer', function () {
-      faker.seed(100);
-      var name = faker.name.findName();
-      assert.strictEqual(name, 'Eva Jenkins');
-    });
-
-    it('should return deterministic results when seeded with 0', function () {
-      faker.seed(0);
-      var name = faker.name.findName();
-      assert.strictEqual(name, 'Lola Sporer');
-    });
-
-    it('should return deterministic results when seeded with array - one element', function () {
-      faker.seed([10]);
-      var name = faker.name.findName();
-      assert.strictEqual(name, 'Duane Kshlerin');
-    });
-
-    it('should return deterministic results when seeded with array - multiple elements', function () {
-      faker.seed([10, 100, 1000]);
-      var name = faker.name.findName();
-      assert.strictEqual(name, 'Alma Shanahan');
-    });
-  });
-
-  describe('float', function () {
-    it('random.float() uses datatype module and prints deprecation warning', function () {
-      sinon.spy(console, 'log');
-      sinon.spy(faker.datatype, 'float');
-      faker.random.float();
-      assert.ok(faker.datatype.float.called);
-      assert.ok(
-        console.log.calledWith(
-          'Deprecation Warning: faker.random.float is now located in faker.datatype.float'
-        )
-      );
-      faker.datatype.float.restore();
-      console.log.restore();
-    });
-  });
-
-  describe('arrayElement', function () {
-    it('returns a random element in the array', function () {
-      var testArray = ['hello', 'to', 'you', 'my', 'friend'];
-      assert.ok(testArray.indexOf(faker.random.arrayElement(testArray)) > -1);
-    });
-
-    it('returns a random element in the array when there is only 1', function () {
-      var testArray = ['hello'];
-      assert.ok(testArray.indexOf(faker.random.arrayElement(testArray)) > -1);
-    });
-  });
-
-  describe('arrayElements', function () {
-    it('returns a subset with random elements in the array', function () {
-      var testArray = ['hello', 'to', 'you', 'my', 'friend'];
-      var subset = faker.random.arrayElements(testArray);
-
-      // Check length
-      assert.ok(subset.length >= 1 && subset.length <= testArray.length);
-
-      // Check elements
-      subset.forEach(function (element) {
-        assert.ok(testArray.indexOf(element) > -1);
-      });
-
-      // Check uniqueness
-      subset.forEach(function (element) {
-        assert.ok(!this.hasOwnProperty(element));
-        this[element] = true;
-      }, {});
-    });
-
-    it('returns a subset of fixed length with random elements in the array', function () {
-      var testArray = ['hello', 'to', 'you', 'my', 'friend'];
-      var subset = faker.random.arrayElements(testArray, 3);
-
-      // Check length
-      assert.ok(subset.length === 3);
-
-      // Check elements
-      subset.forEach(function (element) {
-        assert.ok(testArray.indexOf(element) > -1);
-      });
-
-      // Check uniqueness
-      subset.forEach(function (element) {
-        assert.ok(!this.hasOwnProperty(element));
-        this[element] = true;
-      }, {});
-    });
-  });
-
-  describe('UUID', function () {
-    it('random.uuid() uses datatype module and prints deprecation warning', function () {
-      sinon.spy(console, 'log');
-      sinon.spy(faker.datatype, 'uuid');
-      faker.random.uuid();
-      assert.ok(faker.datatype.uuid.called);
-      assert.ok(
-        console.log.calledWith(
-          'Deprecation Warning: faker.random.uuid is now located in faker.datatype.uuid'
-        )
-      );
-      faker.datatype.uuid.restore();
-      console.log.restore();
-    });
-  });
-
-  describe('boolean', function () {
-    it('random.boolean() uses datatype module and prints deprecation warning', function () {
-      sinon.spy(console, 'log');
-      sinon.spy(faker.datatype, 'boolean');
-      faker.random.boolean();
-      assert.ok(faker.datatype.boolean.called);
-      assert.ok(
-        console.log.calledWith(
-          'Deprecation Warning: faker.random.boolean is now located in faker.datatype.boolean'
-        )
-      );
-      faker.datatype.boolean.restore();
-      console.log.restore();
-    });
-  });
-
-  describe('semver', function () {
-    var semver = faker.system.semver();
-
-    it('should generate a string', function () {
-      assert.ok(typeof semver === 'string');
-    });
-
-    it('should generate a valid semver', function () {
-      assert.ok(/^\d+\.\d+\.\d+$/.test(semver));
-    });
-  });
-
-  describe('alpha', function () {
-    var alpha = faker.random.alpha;
-
-    it('should return single letter when no count provided', function () {
-      assert.ok(alpha().length === 1);
-    });
-
-    it('should return lowercase letter when no upcase option provided', function () {
-      assert.ok(alpha().match(/[a-z]/));
-    });
-
-    it('should return uppercase when upcase option is true', function () {
-      assert.ok(alpha({ upcase: true }).match(/[A-Z]/));
-    });
-
-    it('should generate many random letters', function () {
-      assert.ok(alpha(5).length === 5);
-    });
-
-    it('should be able to ban some characters', function () {
-      var alphaText = alpha(5, { bannedChars: ['a', 'p'] });
-      assert.ok(alphaText.length === 5);
-      assert.ok(alphaText.match(/[b-oq-z]/));
-    });
-    it('should be able handle mistake in banned characters array', function () {
-      var alphaText = alpha(5, { bannedChars: ['a', 'a', 'p'] });
-      assert.ok(alphaText.length === 5);
-      assert.ok(alphaText.match(/[b-oq-z]/));
-    });
-  });
-
-  describe('alphaNumeric', function () {
-    var alphaNumeric = faker.random.alphaNumeric;
-
-    it('should generate single character when no additional argument was provided', function () {
-      assert.ok(alphaNumeric().length === 1);
-    });
-
-    it('should generate many random characters', function () {
-      assert.ok(alphaNumeric(5).length === 5);
-    });
-
-    it('should be able to ban some characters', function () {
-      var alphaText = alphaNumeric(5, { bannedChars: ['a', 'p'] });
-      assert.ok(alphaText.length === 5);
-      assert.ok(alphaText.match(/[b-oq-z]/));
-    });
-    it('should be able handle mistake in banned characters array', function () {
-      var alphaText = alphaNumeric(5, { bannedChars: ['a', 'p', 'a'] });
-      assert.ok(alphaText.length === 5);
-      assert.ok(alphaText.match(/[b-oq-z]/));
-    });
-  });
-
-  describe('hexaDecimal', function () {
-    it('random.hexaDecimal() uses datatype module and prints deprecation warning', function () {
-      sinon.spy(console, 'log');
-      sinon.spy(faker.datatype, 'hexaDecimal');
-      faker.random.hexaDecimal();
-      assert.ok(faker.datatype.hexaDecimal.called);
-      assert.ok(
-        console.log.calledWith(
-          'Deprecation Warning: faker.random.hexaDecimal is now located in faker.datatype.hexaDecimal'
-        )
-      );
-      faker.datatype.hexaDecimal.restore();
-      console.log.restore();
-    });
-  });
-
-  describe('mersenne twister', function () {
-    it('returns a random number without given min / max arguments', function () {
-      var max = 10;
-      var randomNumber = mersenne.rand();
-      assert.ok(typeof randomNumber === 'number');
-    });
-
-    it('throws an error when attempting to seed() a non-integer', function () {
-      assert.throws(function () {
-        mersenne.seed('abc');
-      }, Error);
-    });
-
-    it('throws an error when attempting to seed() a non-integer', function () {
-      assert.throws(function () {
-        mersenne.seed_array('abc');
-      }, Error);
-    });
-  });
-});
diff --git a/test/run.js b/test/run.js
deleted file mode 100755
index ff0c0051..00000000
--- a/test/run.js
+++ /dev/null
@@ -1,76 +0,0 @@
-#!/usr/bin/env node
-process.env.NODE_ENV = 'test';
-
-var fs = require('fs');
-var Mocha = require('mocha');
-var optimist = require('optimist');
-var walk_dir = require('./support/walk_dir');
-
-var argv = optimist
-  .usage('Usage: $0 -t [types] --reporter [reporter] --timeout [timeout]')
-  .default({ types: 'unit,functional', reporter: 'spec', timeout: 6000 })
-  .describe(
-    'types',
-    'The types of tests to run, separated by commas. E.g., unit,functional,acceptance'
-  )
-  .describe('reporter', 'The mocha test reporter to use.')
-  .describe('timeout', 'The mocha timeout to use per test (ms).')
-  .boolean('help')
-  .alias('types', 'T')
-  .alias('timeout', 't')
-  .alias('reporter', 'R')
-  .alias('help', 'h').argv;
-
-var mocha = new Mocha({
-  timeout: argv.timeout,
-  reporter: argv.reporter,
-  ui: 'bdd',
-});
-
-var valid_test_types = ['unit', 'functional', 'acceptance', 'integration'];
-var requested_types = argv.types.split(',');
-var types_to_use = [];
-
-valid_test_types.forEach(function (valid_test_type) {
-  if (requested_types.indexOf(valid_test_type) !== -1) {
-    types_to_use.push(valid_test_type);
-  }
-});
-
-if (argv.help || types_to_use.length === 0) {
-  console.log('\n' + optimist.help());
-  process.exit();
-}
-
-var is_valid_file = function (file) {
-  for (var i = 0; i < types_to_use.length; i++) {
-    var test_type = types_to_use[i];
-    var ext = test_type + '.js';
-
-    if (file.indexOf(ext) !== -1) {
-      return true;
-    }
-  }
-
-  return false;
-};
-
-function run(cb) {
-  walk_dir.walk('test', is_valid_file, function (err, files) {
-    if (err) {
-      return cb(err);
-    }
-
-    files.forEach(function (file) {
-      mocha.addFile(file);
-    });
-
-    cb();
-  });
-}
-
-run(function (err) {
-  mocha.run(function (failures) {
-    process.exit(failures);
-  });
-});
diff --git a/test/support/chai.js b/test/support/chai.js
deleted file mode 100644
index 8795090d..00000000
--- a/test/support/chai.js
+++ /dev/null
@@ -1,3484 +0,0 @@
-!(function (name, definition) {
-  if (typeof define == 'function' && typeof define.amd == 'object')
-    define(definition);
-  else this[name] = definition();
-})('chai', function () {
-  // CommonJS require()
-
-  function require(p) {
-    var path = require.resolve(p),
-      mod = require.modules[path];
-    if (!mod) throw new Error('failed to require "' + p + '"');
-    if (!mod.exports) {
-      mod.exports = {};
-      mod.call(mod.exports, mod, mod.exports, require.relative(path));
-    }
-    return mod.exports;
-  }
-
-  require.modules = {};
-
-  require.resolve = function (path) {
-    var orig = path,
-      reg = path + '.js',
-      index = path + '/index.js';
-    return (
-      (require.modules[reg] && reg) || (require.modules[index] && index) || orig
-    );
-  };
-
-  require.register = function (path, fn) {
-    require.modules[path] = fn;
-  };
-
-  require.relative = function (parent) {
-    return function (p) {
-      if ('.' != p[0]) return require(p);
-
-      var path = parent.split('/'),
-        segs = p.split('/');
-      path.pop();
-
-      for (var i = 0; i < segs.length; i++) {
-        var seg = segs[i];
-        if ('..' == seg) path.pop();
-        else if ('.' != seg) path.push(seg);
-      }
-
-      return require(path.join('/'));
-    };
-  };
-
-  require.register('assertion.js', function (module, exports, require) {
-    /*!
-     * chai
-     * http://chaijs.com
-     * Copyright(c) 2011-2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    /*!
-     * Module dependencies.
-     */
-
-    var AssertionError = require('./browser/error'),
-      toString = Object.prototype.toString,
-      util = require('./utils'),
-      flag = util.flag;
-
-    /*!
-     * Module export.
-     */
-
-    module.exports = Assertion;
-
-    /*!
-     * Assertion Constructor
-     *
-     * Creates object for chaining.
-     *
-     * @api private
-     */
-
-    function Assertion(obj, msg, stack) {
-      flag(this, 'ssfi', stack || arguments.callee);
-      flag(this, 'object', obj);
-      flag(this, 'message', msg);
-    }
-
-    /*!
-     * ### Assertion.includeStack
-     *
-     * User configurable property, influences whether stack trace
-     * is included in Assertion error message. Default of false
-     * suppresses stack trace in the error message
-     *
-     *     Assertion.includeStack = true;  // enable stack on error
-     *
-     * @api public
-     */
-
-    Assertion.includeStack = false;
-
-    Assertion.addProperty = function (name, fn) {
-      util.addProperty(this.prototype, name, fn);
-    };
-
-    Assertion.addMethod = function (name, fn) {
-      util.addMethod(this.prototype, name, fn);
-    };
-
-    Assertion.addChainableMethod = function (name, fn, chainingBehavior) {
-      util.addChainableMethod(this.prototype, name, fn, chainingBehavior);
-    };
-
-    Assertion.overwriteProperty = function (name, fn) {
-      util.overwriteProperty(this.prototype, name, fn);
-    };
-
-    Assertion.overwriteMethod = function (name, fn) {
-      util.overwriteMethod(this.prototype, name, fn);
-    };
-
-    /*!
-     * ### .assert(expression, message, negateMessage, expected, actual)
-     *
-     * Executes an expression and check expectations. Throws AssertionError for reporting if test doesn't pass.
-     *
-     * @name assert
-     * @param {Philosophical} expression to be tested
-     * @param {String} message to display if fails
-     * @param {String} negatedMessage to display if negated expression fails
-     * @param {Mixed} expected value (remember to check for negation)
-     * @param {Mixed} actual (optional) will default to `this.obj`
-     * @api private
-     */
-
-    Assertion.prototype.assert = function (
-      expr,
-      msg,
-      negateMsg,
-      expected,
-      _actual
-    ) {
-      var msg = util.getMessage(this, arguments),
-        actual = util.getActual(this, arguments),
-        ok = util.test(this, arguments);
-
-      if (!ok) {
-        throw new AssertionError({
-          message: msg,
-          actual: actual,
-          expected: expected,
-          stackStartFunction: Assertion.includeStack
-            ? this.assert
-            : flag(this, 'ssfi'),
-        });
-      }
-    };
-
-    /*!
-     *
-     * ### ._obj
-     *
-     * Quick reference to stored `actual` value for plugin developers.
-     *
-     * @api private
-     */
-
-    Object.defineProperty(Assertion.prototype, '_obj', {
-      get: function () {
-        return flag(this, 'object');
-      },
-      set: function (val) {
-        flag(this, 'object', val);
-      },
-    });
-
-    /**
-     * ### Language Chains
-     *
-     * The following are provide as chainable getters to
-     * improve the readability of your assertions. They
-     * do not provide an testing capability unless they
-     * have been overwritten by a plugin.
-     *
-     * **Chains**
-     *
-     * - to
-     * - be
-     * - been
-     * - is
-     * - and
-     * - have
-     * - with
-     *
-     * @name language chains
-     * @api public
-     */
-
-    ['to', 'be', 'been', 'is', 'and', 'have', 'with'].forEach(function (chain) {
-      Object.defineProperty(Assertion.prototype, chain, {
-        get: function () {
-          return this;
-        },
-        configurable: true,
-      });
-    });
-
-    /**
-     * ### .not
-     *
-     * Negates any of assertions following in the chain.
-     *
-     *     expect(foo).to.not.equal('bar');
-     *     expect(goodFn).to.not.throw(Error);
-     *     expect({ foo: 'baz' }).to.have.property('foo')
-     *       .and.not.equal('bar');
-     *
-     * @name not
-     * @api public
-     */
-
-    Object.defineProperty(Assertion.prototype, 'not', {
-      get: function () {
-        flag(this, 'negate', true);
-        return this;
-      },
-      configurable: true,
-    });
-
-    /**
-     * ### .deep
-     *
-     * Sets the `deep` flag, later used by the `equal` and
-     * `property` assertions.
-     *
-     *     expect(foo).to.deep.equal({ bar: 'baz' });
-     *     expect({ foo: { bar: { baz: 'quux' } } })
-     *       .to.have.deep.property('foo.bar.baz', 'quux');
-     *
-     * @name deep
-     * @api public
-     */
-
-    Object.defineProperty(Assertion.prototype, 'deep', {
-      get: function () {
-        flag(this, 'deep', true);
-        return this;
-      },
-      configurable: true,
-    });
-
-    /**
-     * ### .a(type)
-     *
-     * The `a` and `an` assertions are aliases that can be
-     * used either as language chains or to assert a value's
-     * type (as revealed by `Object.prototype.toString`).
-     *
-     *     // typeof
-     *     expect('test').to.be.a('string');
-     *     expect({ foo: 'bar' }).to.be.an('object');
-     *     expect(null).to.be.a('null');
-     *     expect(undefined).to.be.an('undefined');
-     *
-     *     // language chain
-     *     expect(foo).to.be.an.instanceof(Foo);
-     *
-     * @name a
-     * @alias an
-     * @param {String} type
-     * @api public
-     */
-
-    function an(type) {
-      var obj = flag(this, 'object'),
-        klassStart = type.charAt(0).toUpperCase(),
-        klass = klassStart + type.slice(1),
-        article = ~['A', 'E', 'I', 'O', 'U'].indexOf(klassStart) ? 'an ' : 'a ';
-
-      this.assert(
-        '[object ' + klass + ']' === toString.call(obj),
-        'expected #{this} to be ' + article + type,
-        'expected #{this} not to be ' + article + type,
-        '[object ' + klass + ']',
-        toString.call(obj)
-      );
-    }
-
-    Assertion.addChainableMethod('an', an);
-    Assertion.addChainableMethod('a', an);
-
-    /**
-     * ### .include(value)
-     *
-     * The `include` and `contain` assertions can be used as either property
-     * based language chains or as methods to assert the inclusion of an object
-     * in an array or a substring in a string. When used as language chains,
-     * they toggle the `contain` flag for the `keys` assertion.
-     *
-     *     expect([1,2,3]).to.include(2);
-     *     expect('foobar').to.contain('foo');
-     *     expect({ foo: 'bar', hello: 'universe' }).to.include.keys('foo');
-     *
-     * @name include
-     * @alias contain
-     * @param {Object|String|Number} obj
-     * @api public
-     */
-
-    function includeChainingBehavior() {
-      flag(this, 'contains', true);
-    }
-
-    function include(val) {
-      var obj = flag(this, 'object');
-      this.assert(
-        ~obj.indexOf(val),
-        'expected #{this} to include ' + util.inspect(val),
-        'expected #{this} to not include ' + util.inspect(val)
-      );
-    }
-
-    Assertion.addChainableMethod('include', include, includeChainingBehavior);
-    Assertion.addChainableMethod('contain', include, includeChainingBehavior);
-
-    /**
-     * ### .ok
-     *
-     * Asserts that the target is truthy.
-     *
-     *     expect('everything').to.be.ok;
-     *     expect(1).to.be.ok;
-     *     expect(false).to.not.be.ok;
-     *     expect(undefined).to.not.be.ok;
-     *     expect(null).to.not.be.ok;
-     *
-     * @name ok
-     * @api public
-     */
-
-    Object.defineProperty(Assertion.prototype, 'ok', {
-      get: function () {
-        this.assert(
-          flag(this, 'object'),
-          'expected #{this} to be truthy',
-          'expected #{this} to be falsy'
-        );
-
-        return this;
-      },
-      configurable: true,
-    });
-
-    /**
-     * ### .true
-     *
-     * Asserts that the target is `true`.
-     *
-     *     expect(true).to.be.true;
-     *     expect(1).to.not.be.true;
-     *
-     * @name true
-     * @api public
-     */
-
-    Object.defineProperty(Assertion.prototype, 'true', {
-      get: function () {
-        this.assert(
-          true === flag(this, 'object'),
-          'expected #{this} to be true',
-          'expected #{this} to be false',
-          this.negate ? false : true
-        );
-
-        return this;
-      },
-      configurable: true,
-    });
-
-    /**
-     * ### .false
-     *
-     * Asserts that the target is `false`.
-     *
-     *     expect(false).to.be.false;
-     *     expect(0).to.not.be.false;
-     *
-     * @name false
-     * @api public
-     */
-
-    Object.defineProperty(Assertion.prototype, 'false', {
-      get: function () {
-        this.assert(
-          false === flag(this, 'object'),
-          'expected #{this} to be false',
-          'expected #{this} to be true',
-          this.negate ? true : false
-        );
-
-        return this;
-      },
-      configurable: true,
-    });
-
-    /**
-     * ### .null
-     *
-     * Asserts that the target is `null`.
-     *
-     *     expect(null).to.be.null;
-     *     expect(undefined).not.to.be.null;
-     *
-     * @name null
-     * @api public
-     */
-
-    Object.defineProperty(Assertion.prototype, 'null', {
-      get: function () {
-        this.assert(
-          null === flag(this, 'object'),
-          'expected #{this} to be null',
-          'expected #{this} not to be null',
-          this.negate ? false : true
-        );
-
-        return this;
-      },
-      configurable: true,
-    });
-
-    /**
-     * ### .undefined
-     *
-     * Asserts that the target is `undefined`.
-     *
-     *      expect(undefined).to.be.undefined;
-     *      expect(null).to.not.be.undefined;
-     *
-     * @name undefined
-     * @api public
-     */
-
-    Object.defineProperty(Assertion.prototype, 'undefined', {
-      get: function () {
-        this.assert(
-          undefined === flag(this, 'object'),
-          'expected #{this} to be undefined',
-          'expected #{this} not to be undefined',
-          this.negate ? false : true
-        );
-
-        return this;
-      },
-      configurable: true,
-    });
-
-    /**
-     * ### .exist
-     *
-     * Asserts that the target is neither `null` nor `undefined`.
-     *
-     *     var foo = 'hi'
-     *       , bar = null
-     *       , baz;
-     *
-     *     expect(foo).to.exist;
-     *     expect(bar).to.not.exist;
-     *     expect(baz).to.not.exist;
-     *
-     * @name exist
-     * @api public
-     */
-
-    Object.defineProperty(Assertion.prototype, 'exist', {
-      get: function () {
-        this.assert(
-          null != flag(this, 'object'),
-          'expected #{this} to exist',
-          'expected #{this} to not exist'
-        );
-
-        return this;
-      },
-      configurable: true,
-    });
-
-    /**
-     * ### .empty
-     *
-     * Asserts that the target's length is `0`. For arrays, it checks
-     * the `length` property. For objects, it gets the count of
-     * enumerable keys.
-     *
-     *     expect([]).to.be.empty;
-     *     expect('').to.be.empty;
-     *     expect({}).to.be.empty;
-     *
-     * @name empty
-     * @api public
-     */
-
-    Object.defineProperty(Assertion.prototype, 'empty', {
-      get: function () {
-        var obj = flag(this, 'object'),
-          expected = obj;
-
-        if (Array.isArray(obj) || 'string' === typeof object) {
-          expected = obj.length;
-        } else if (typeof obj === 'object') {
-          expected = Object.keys(obj).length;
-        }
-
-        this.assert(
-          !expected,
-          'expected #{this} to be empty',
-          'expected #{this} not to be empty'
-        );
-
-        return this;
-      },
-      configurable: true,
-    });
-
-    /**
-     * ### .arguments
-     *
-     * Asserts that the target is an arguments object.
-     *
-     *     function test () {
-     *       expect(arguments).to.be.arguments;
-     *     }
-     *
-     * @name arguments
-     * @alias Arguments
-     * @api public
-     */
-
-    function checkArguments() {
-      var obj = flag(this, 'object'),
-        type = Object.prototype.toString.call(obj);
-      this.assert(
-        '[object Arguments]' === type,
-        'expected #{this} to be arguments but got ' + type,
-        'expected #{this} to not be arguments'
-      );
-    }
-
-    Assertion.addProperty('arguments', checkArguments);
-    Assertion.addProperty('Arguments', checkArguments);
-
-    /**
-     * ### .equal(value)
-     *
-     * Asserts that the target is strictly equal (`===`) to `value`.
-     * Alternately, if the `deep` flag is set, asserts that
-     * the target is deeply equal to `value`.
-     *
-     *     expect('hello').to.equal('hello');
-     *     expect(42).to.equal(42);
-     *     expect(1).to.not.equal(true);
-     *     expect({ foo: 'bar' }).to.not.equal({ foo: 'bar' });
-     *     expect({ foo: 'bar' }).to.deep.equal({ foo: 'bar' });
-     *
-     * @name equal
-     * @param {Mixed} value
-     * @api public
-     */
-
-    Assertion.prototype.equal = function (val) {
-      var obj = flag(this, 'object');
-      if (flag(this, 'deep')) {
-        return this.eql(val);
-      } else {
-        this.assert(
-          val === obj,
-          'expected #{this} to equal #{exp}',
-          'expected #{this} to not equal #{exp}',
-          val
-        );
-      }
-
-      return this;
-    };
-
-    /**
-     * ### .eql(value)
-     *
-     * Asserts that the target is deeply equal to `value`.
-     *
-     *     expect({ foo: 'bar' }).to.eql({ foo: 'bar' });
-     *     expect([ 1, 2, 3 ]).to.eql([ 1, 2, 3 ]);
-     *
-     * @name eql
-     * @param {Mixed} value
-     * @api public
-     */
-
-    Assertion.prototype.eql = function (obj) {
-      this.assert(
-        util.eql(obj, flag(this, 'object')),
-        'expected #{this} to deeply equal #{exp}',
-        'expected #{this} to not deeply equal #{exp}',
-        obj
-      );
-
-      return this;
-    };
-
-    /**
-     * ### .above(value)
-     *
-     * Asserts that the target is greater than `value`.
-     *
-     *     expect(10).to.be.above(5);
-     *
-     * @name above
-     * @alias gt
-     * @param {Number} value
-     * @api public
-     */
-
-    Assertion.prototype.above = function (val) {
-      this.assert(
-        flag(this, 'object') > val,
-        'expected #{this} to be above ' + val,
-        'expected #{this} to be below ' + val
-      );
-
-      return this;
-    };
-
-    /**
-     * ### .below(value)
-     *
-     * Asserts that the target is less than `value`.
-     *
-     *     expect(5).to.be.below(10);
-     *
-     * @name below
-     * @alias lt
-     * @param {Number} value
-     * @api public
-     */
-
-    Assertion.prototype.below = function (val) {
-      this.assert(
-        flag(this, 'object') < val,
-        'expected #{this} to be below ' + val,
-        'expected #{this} to be above ' + val
-      );
-
-      return this;
-    };
-
-    /**
-     * ### .within(start, finish)
-     *
-     * Asserts that the target is within a range.
-     *
-     *     expect(7).to.be.within(5,10);
-     *
-     * @name within
-     * @param {Number} start lowerbound inclusive
-     * @param {Number} finish upperbound inclusive
-     * @api public
-     */
-
-    Assertion.prototype.within = function (start, finish) {
-      var obj = flag(this, 'object'),
-        range = start + '..' + finish;
-
-      this.assert(
-        obj >= start && obj <= finish,
-        'expected #{this} to be within ' + range,
-        'expected #{this} to not be within ' + range
-      );
-
-      return this;
-    };
-
-    /**
-     * ### .instanceof(constructor)
-     *
-     * Asserts that the target is an instance of `constructor`.
-     *
-     *     var Tea = function (name) { this.name = name; }
-     *       , Chai = new Tea('chai');
-     *
-     *     expect(Chai).to.be.an.instanceof(Tea);
-     *     expect([ 1, 2, 3 ]).to.be.instanceof(Array);
-     *
-     * @name instanceof
-     * @param {Constructor} constructor
-     * @alias instanceOf
-     * @api public
-     */
-
-    Assertion.prototype.instanceOf = function (constructor) {
-      var name = util.getName(constructor);
-      this.assert(
-        flag(this, 'object') instanceof constructor,
-        'expected #{this} to be an instance of ' + name,
-        'expected #{this} to not be an instance of ' + name
-      );
-
-      return this;
-    };
-
-    /**
- * ### .property(name, [value])
- *
- * Asserts that the target has a property `name`, optionally asserting that
- * the value of that property is strictly equal to  `value`.
- * If the `deep` flag is set, you can use dot- and bracket-notation for deep
- * references into objects and arrays.
- *
- *     // simple referencing
- *     var obj = { foo: 'bar' };
- *     expect(obj).to.have.property('foo');
- *     expect(obj).to.have.property('foo', 'bar');
- *     expect(obj).to.have.property('foo').to.be.a('string');
- *
- *     // deep referencing
- *     var deepObj = {
- *         green: { tea: 'matcha' }
- *       , teas: [ 'chai', 'matcha', { tea: 'konacha' } ]
- *     };
-
- *     expect(deepObj).to.have.deep.property('green.tea', 'matcha');
- *     expect(deepObj).to.have.deep.property('teas[1]', 'matcha');
- *     expect(deepObj).to.have.deep.property('teas[2].tea', 'konacha');
- *
- * @name property
- * @param {String} name
- * @param {Mixed} value (optional)
- * @returns value of property for chaining
- * @api public
- */
-
-    Assertion.prototype.property = function (name, val) {
-      var obj = flag(this, 'object'),
-        value = flag(this, 'deep') ? util.getPathValue(name, obj) : obj[name],
-        descriptor = flag(this, 'deep') ? 'deep property ' : 'property ',
-        negate = flag(this, 'negate');
-
-      if (negate && undefined !== val) {
-        if (undefined === value) {
-          throw new Error(
-            util.inspect(obj) + ' has no ' + descriptor + util.inspect(name)
-          );
-        }
-      } else {
-        this.assert(
-          undefined !== value,
-          'expected #{this} to have a ' + descriptor + util.inspect(name),
-          'expected #{this} to not have ' + descriptor + util.inspect(name)
-        );
-      }
-
-      if (undefined !== val) {
-        this.assert(
-          val === value,
-          'expected #{this} to have a ' +
-            descriptor +
-            util.inspect(name) +
-            ' of #{exp}, but got #{act}',
-          'expected #{this} to not have a ' +
-            descriptor +
-            util.inspect(name) +
-            ' of #{act}',
-          val,
-          value
-        );
-      }
-
-      flag(this, 'object', value);
-      return this;
-    };
-
-    /**
-     * ### .ownProperty(name)
-     *
-     * Asserts that the target has an own property `name`.
-     *
-     *     expect('test').to.have.ownProperty('length');
-     *
-     * @name ownProperty
-     * @alias haveOwnProperty
-     * @param {String} name
-     * @api public
-     */
-
-    Assertion.prototype.ownProperty = function (name) {
-      var obj = flag(this, 'object');
-      this.assert(
-        obj.hasOwnProperty(name),
-        'expected #{this} to have own property ' + util.inspect(name),
-        'expected #{this} to not have own property ' + util.inspect(name)
-      );
-      return this;
-    };
-
-    /**
-     * ### .length(value)
-     *
-     * Asserts that the target's `length` property has the expected value.
-     *
-     *     expect([1,2,3]).to.have.length(3);
-     *     expect('foobar').to.have.length(6);
-     *
-     * @name length
-     * @alias lengthOf
-     * @param {Number} length
-     * @api public
-     */
-
-    Assertion.prototype.length = function (n) {
-      var obj = flag(this, 'object');
-      new Assertion(obj).to.have.property('length');
-      var len = obj.length;
-
-      this.assert(
-        len == n,
-        'expected #{this} to have a length of #{exp} but got #{act}',
-        'expected #{this} to not have a length of #{act}',
-        n,
-        len
-      );
-
-      return this;
-    };
-
-    /**
-     * ### .match(regexp)
-     *
-     * Asserts that the target matches a regular expression.
-     *
-     *     expect('foobar').to.match(/^foo/);
-     *
-     * @name match
-     * @param {RegExp} RegularExpression
-     * @api public
-     */
-
-    Assertion.prototype.match = function (re) {
-      var obj = flag(this, 'object');
-      this.assert(
-        re.exec(obj),
-        'expected #{this} to match ' + re,
-        'expected #{this} not to match ' + re
-      );
-
-      return this;
-    };
-
-    /**
-     * ### .string(string)
-     *
-     * Asserts that the string target contains another string.
-     *
-     *     expect('foobar').to.have.string('bar');
-     *
-     * @name string
-     * @param {String} string
-     * @api public
-     */
-
-    Assertion.prototype.string = function (str) {
-      var obj = flag(this, 'object');
-      new Assertion(obj).is.a('string');
-
-      this.assert(
-        ~obj.indexOf(str),
-        'expected #{this} to contain ' + util.inspect(str),
-        'expected #{this} to not contain ' + util.inspect(str)
-      );
-
-      return this;
-    };
-
-    /**
-     * ### .keys(key1, [key2], [...])
-     *
-     * Asserts that the target has exactly the given keys, or
-     * asserts the inclusion of some keys when using the
-     * `include` or `contain` modifiers.
-     *
-     *     expect({ foo: 1, bar: 2 }).to.have.keys(['foo', 'bar']);
-     *     expect({ foo: 1, bar: 2, baz: 3 }).to.contain.keys('foo', 'bar');
-     *
-     * @name keys
-     * @alias key
-     * @param {String...|Array} keys
-     * @api public
-     */
-
-    Assertion.prototype.keys = function (keys) {
-      var obj = flag(this, 'object'),
-        str,
-        ok = true;
-
-      keys =
-        keys instanceof Array ? keys : Array.prototype.slice.call(arguments);
-
-      if (!keys.length) throw new Error('keys required');
-
-      var actual = Object.keys(obj),
-        len = keys.length;
-
-      // Inclusion
-      ok = keys.every(function (key) {
-        return ~actual.indexOf(key);
-      });
-
-      // Strict
-      if (!flag(this, 'negate') && !flag(this, 'contains')) {
-        ok = ok && keys.length == actual.length;
-      }
-
-      // Key string
-      if (len > 1) {
-        keys = keys.map(function (key) {
-          return util.inspect(key);
-        });
-        var last = keys.pop();
-        str = keys.join(', ') + ', and ' + last;
-      } else {
-        str = util.inspect(keys[0]);
-      }
-
-      // Form
-      str = (len > 1 ? 'keys ' : 'key ') + str;
-
-      // Have / include
-      str = (flag(this, 'contains') ? 'contain ' : 'have ') + str;
-
-      // Assertion
-      this.assert(
-        ok,
-        'expected #{this} to ' + str,
-        'expected #{this} to not ' + str,
-        keys,
-        Object.keys(obj)
-      );
-
-      return this;
-    };
-
-    /**
-     * ### .throw(constructor)
-     *
-     * Asserts that the function target will throw a specific error, or specific type of error
-     * (as determined using `instanceof`), optionally with a RegExp or string inclusion test
-     * for the error's message.
-     *
-     *     var err = new ReferenceError('This is a bad function.');
-     *     var fn = function () { throw err; }
-     *     expect(fn).to.throw(ReferenceError);
-     *     expect(fn).to.throw(Error);
-     *     expect(fn).to.throw(/bad function/);
-     *     expect(fn).to.not.throw('good function');
-     *     expect(fn).to.throw(ReferenceError, /bad function/);
-     *     expect(fn).to.throw(err);
-     *     expect(fn).to.not.throw(new RangeError('Out of range.'));
-     *
-     * Please note that when a throw expectation is negated, it will check each
-     * parameter independently, starting with error constructor type. The appropriate way
-     * to check for the existence of a type of error but for a message that does not match
-     * is to use `and`.
-     *
-     *     expect(fn).to.throw(ReferenceError)
-     *        .and.not.throw(/good function/);
-     *
-     * @name throw
-     * @alias throws
-     * @alias Throw
-     * @param {ErrorConstructor} constructor
-     * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
-     * @api public
-     */
-
-    Assertion.prototype.Throw = function (constructor, msg) {
-      var obj = flag(this, 'object');
-      new Assertion(obj).is.a('function');
-
-      var thrown = false,
-        desiredError = null,
-        name = null;
-
-      if (arguments.length === 0) {
-        msg = null;
-        constructor = null;
-      } else if (
-        constructor &&
-        (constructor instanceof RegExp || 'string' === typeof constructor)
-      ) {
-        msg = constructor;
-        constructor = null;
-      } else if (constructor && constructor instanceof Error) {
-        desiredError = constructor;
-        constructor = null;
-        msg = null;
-      } else if (typeof constructor === 'function') {
-        name = new constructor().name;
-      } else {
-        constructor = null;
-      }
-
-      try {
-        obj();
-      } catch (err) {
-        // first, check desired error
-        if (desiredError) {
-          this.assert(
-            err === desiredError,
-            'expected #{this} to throw ' +
-              util.inspect(desiredError) +
-              ' but ' +
-              util.inspect(err) +
-              ' was thrown',
-            'expected #{this} to not throw ' + util.inspect(desiredError)
-          );
-          return this;
-        }
-        // next, check constructor
-        if (constructor) {
-          this.assert(
-            err instanceof constructor,
-            'expected #{this} to throw ' +
-              name +
-              ' but a ' +
-              err.name +
-              ' was thrown',
-            'expected #{this} to not throw ' + name
-          );
-          if (!msg) return this;
-        }
-        // next, check message
-        if (err.message && msg && msg instanceof RegExp) {
-          this.assert(
-            msg.exec(err.message),
-            'expected #{this} to throw error matching ' +
-              msg +
-              ' but got ' +
-              util.inspect(err.message),
-            'expected #{this} to throw error not matching ' + msg
-          );
-          return this;
-        } else if (err.message && msg && 'string' === typeof msg) {
-          this.assert(
-            ~err.message.indexOf(msg),
-            'expected #{this} to throw error including #{exp} but got #{act}',
-            'expected #{this} to throw error not including #{act}',
-            msg,
-            err.message
-          );
-          return this;
-        } else {
-          thrown = true;
-        }
-      }
-
-      var expectedThrown = name
-        ? name
-        : desiredError
-        ? util.inspect(desiredError)
-        : 'an error';
-
-      this.assert(
-        thrown === true,
-        'expected #{this} to throw ' + expectedThrown,
-        'expected #{this} to not throw ' + expectedThrown
-      );
-
-      return this;
-    };
-
-    /**
-     * ### .respondTo(method)
-     *
-     * Asserts that the object or class target will respond to a method.
-     *
-     *     Klass.prototype.bar = function(){};
-     *     expect(Klass).to.respondTo('bar');
-     *     expect(obj).to.respondTo('bar');
-     *
-     * To check if a constructor will respond to a static function,
-     * set the `itself` flag.
-     *
-     *    Klass.baz = function(){};
-     *    expect(Klass).itself.to.respondTo('baz');
-     *
-     * @name respondTo
-     * @param {String} method
-     * @api public
-     */
-
-    Assertion.prototype.respondTo = function (method) {
-      var obj = flag(this, 'object'),
-        itself = flag(this, 'itself'),
-        context =
-          'function' === typeof obj && !itself
-            ? obj.prototype[method]
-            : obj[method];
-
-      this.assert(
-        'function' === typeof context,
-        'expected #{this} to respond to ' + util.inspect(method),
-        'expected #{this} to not respond to ' + util.inspect(method),
-        'function',
-        typeof context
-      );
-
-      return this;
-    };
-
-    /**
-     * ### .itself
-     *
-     * Sets the `itself` flag, later used by the `respondTo` assertion.
-     *
-     *    function Foo() {}
-     *    Foo.bar = function() {}
-     *    Foo.prototype.baz = function() {}
-     *
-     *    expect(Foo).itself.to.respondTo('bar');
-     *    expect(Foo).itself.not.to.respondTo('baz');
-     *
-     * @name itself
-     * @api public
-     */
-    Object.defineProperty(Assertion.prototype, 'itself', {
-      get: function () {
-        flag(this, 'itself', true);
-        return this;
-      },
-      configurable: true,
-    });
-
-    /**
-     * ### .satisfy(method)
-     *
-     * Asserts that the target passes a given truth test.
-     *
-     *     expect(1).to.satisfy(function(num) { return num > 0; });
-     *
-     * @name satisfy
-     * @param {Function} matcher
-     * @api public
-     */
-
-    Assertion.prototype.satisfy = function (matcher) {
-      var obj = flag(this, 'object');
-      this.assert(
-        matcher(obj),
-        'expected #{this} to satisfy ' + util.inspect(matcher),
-        'expected #{this} to not satisfy' + util.inspect(matcher),
-        this.negate ? false : true,
-        matcher(obj)
-      );
-
-      return this;
-    };
-
-    /**
-     * ### .closeTo(expected, delta)
-     *
-     * Asserts that the target is equal `expected`, to within a +/- `delta` range.
-     *
-     *     expect(1.5).to.be.closeTo(1, 0.5);
-     *
-     * @name closeTo
-     * @param {Number} expected
-     * @param {Number} delta
-     * @api public
-     */
-
-    Assertion.prototype.closeTo = function (expected, delta) {
-      var obj = flag(this, 'object');
-      this.assert(
-        obj - delta === expected || obj + delta === expected,
-        'expected #{this} to be close to ' + expected + ' +/- ' + delta,
-        'expected #{this} not to be close to ' + expected + ' +/- ' + delta
-      );
-
-      return this;
-    };
-
-    /*!
-     * Aliases.
-     */
-
-    (function alias(name, as) {
-      Assertion.prototype[as] = Assertion.prototype[name];
-      return alias;
-    })('equal', 'eq')('above', 'gt')('below', 'lt')('length', 'lengthOf')(
-      'keys',
-      'key'
-    )('ownProperty', 'haveOwnProperty')('above', 'greaterThan')(
-      'below',
-      'lessThan'
-    )('Throw', 'throws')('Throw', 'throw')('instanceOf', 'instanceof');
-  }); // module: assertion.js
-
-  require.register('browser/error.js', function (module, exports, require) {
-    /*!
-     * chai
-     * Copyright(c) 2011-2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    module.exports = AssertionError;
-
-    function AssertionError(options) {
-      options = options || {};
-      this.message = options.message;
-      this.actual = options.actual;
-      this.expected = options.expected;
-      this.operator = options.operator;
-
-      if (options.stackStartFunction && Error.captureStackTrace) {
-        var stackStartFunction = options.stackStartFunction;
-        Error.captureStackTrace(this, stackStartFunction);
-      }
-    }
-
-    AssertionError.prototype = Object.create(Error.prototype);
-    AssertionError.prototype.name = 'AssertionError';
-    AssertionError.prototype.constructor = AssertionError;
-
-    AssertionError.prototype.toString = function () {
-      return this.message;
-    };
-  }); // module: browser/error.js
-
-  require.register('chai.js', function (module, exports, require) {
-    /*!
-     * chai
-     * Copyright(c) 2011-2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    var used = [],
-      exports = (module.exports = {});
-
-    /*!
-     * Chai version
-     */
-
-    exports.version = '1.0.4';
-
-    /*!
-     * Primary `Assertion` prototype
-     */
-
-    exports.Assertion = require('./assertion');
-
-    /*!
-     * Assertion Error
-     */
-
-    exports.AssertionError = require('./browser/error');
-
-    /*!
-     * Utils for plugins (not exported)
-     */
-
-    var util = require('./utils');
-
-    /**
-     * # .use(function)
-     *
-     * Provides a way to extend the internals of Chai
-     *
-     * @param {Function}
-     * @returns {this} for chaining
-     * @api public
-     */
-
-    exports.use = function (fn) {
-      if (!~used.indexOf(fn)) {
-        fn(this, util);
-        used.push(fn);
-      }
-
-      return this;
-    };
-
-    /*!
-     * Expect interface
-     */
-
-    var expect = require('./interface/expect');
-    exports.use(expect);
-
-    /*!
-     * Should interface
-     */
-
-    var should = require('./interface/should');
-    exports.use(should);
-
-    /*!
-     * Assert interface
-     */
-
-    var assert = require('./interface/assert');
-    exports.use(assert);
-  }); // module: chai.js
-
-  require.register('interface/assert.js', function (module, exports, require) {
-    /*!
-     * chai
-     * Copyright(c) 2011-2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    module.exports = function (chai, util) {
-      /*!
-       * Chai dependencies.
-       */
-
-      var Assertion = chai.Assertion,
-        flag = util.flag;
-
-      /*!
-       * Module export.
-       */
-
-      /**
-       * ### assert(expression, message)
-       *
-       * Write your own test expressions.
-       *
-       *     assert('foo' !== 'bar', 'foo is not bar');
-       *     assert(Array.isArray([]), 'empty arrays are arrays');
-       *
-       * @param {Mixed} expression to test for truthiness
-       * @param {String} message to display on error
-       * @name assert
-       * @api public
-       */
-
-      var assert = (chai.assert = function (express, errmsg) {
-        var test = new Assertion(null);
-        test.assert(express, errmsg, '[ negation message unavailable ]');
-      });
-
-      /**
-       * ### .fail(actual, expected, [message], [operator])
-       *
-       * Throw a failure. Node.js `assert` module-compatible.
-       *
-       * @name fail
-       * @param {Mixed} actual
-       * @param {Mixed} expected
-       * @param {String} message
-       * @param {String} operator
-       * @api public
-       */
-
-      assert.fail = function (actual, expected, message, operator) {
-        throw new chai.AssertionError({
-          actual: actual,
-          expected: expected,
-          message: message,
-          operator: operator,
-          stackStartFunction: assert.fail,
-        });
-      };
-
-      /**
-       * ### .ok(object, [message])
-       *
-       * Asserts that `object` is truthy.
-       *
-       *     assert.ok('everything', 'everything is ok');
-       *     assert.ok(false, 'this will fail');
-       *
-       * @name ok
-       * @param {Mixed} object to test
-       * @param {String} message
-       * @api public
-       */
-
-      assert.ok = function (val, msg) {
-        new Assertion(val, msg).is.ok;
-      };
-
-      /**
-       * ### .equal(actual, expected, [message])
-       *
-       * Asserts non-strict equality (`==`) of `actual` and `expected`.
-       *
-       *     assert.equal(3, '3', '== coerces values to strings');
-       *
-       * @name equal
-       * @param {Mixed} actual
-       * @param {Mixed} expected
-       * @param {String} message
-       * @api public
-       */
-
-      assert.equal = function (act, exp, msg) {
-        var test = new Assertion(act, msg);
-
-        test.assert(
-          exp == flag(test, 'object'),
-          'expected #{this} to equal #{exp}',
-          'expected #{this} to not equal #{act}',
-          exp,
-          act
-        );
-      };
-
-      /**
-       * ### .notEqual(actual, expected, [message])
-       *
-       * Asserts non-strict inequality (`!=`) of `actual` and `expected`.
-       *
-       *     assert.notEqual(3, 4, 'these numbers are not equal');
-       *
-       * @name notEqual
-       * @param {Mixed} actual
-       * @param {Mixed} expected
-       * @param {String} message
-       * @api public
-       */
-
-      assert.notEqual = function (act, exp, msg) {
-        var test = new Assertion(act, msg);
-
-        test.assert(
-          exp != flag(test, 'object'),
-          'expected #{this} to not equal #{exp}',
-          'expected #{this} to equal #{act}',
-          exp,
-          act
-        );
-      };
-
-      /**
-       * ### .strictEqual(actual, expected, [message])
-       *
-       * Asserts strict equality (`===`) of `actual` and `expected`.
-       *
-       *     assert.strictEqual(true, true, 'these booleans are strictly equal');
-       *
-       * @name strictEqual
-       * @param {Mixed} actual
-       * @param {Mixed} expected
-       * @param {String} message
-       * @api public
-       */
-
-      assert.strictEqual = function (act, exp, msg) {
-        new Assertion(act, msg).to.equal(exp);
-      };
-
-      /**
-       * ### .notStrictEqual(actual, expected, [message])
-       *
-       * Asserts strict inequality (`!==`) of `actual` and `expected`.
-       *
-       *     assert.notStrictEqual(3, '3', 'no coercion for strict equality');
-       *
-       * @name notStrictEqual
-       * @param {Mixed} actual
-       * @param {Mixed} expected
-       * @param {String} message
-       * @api public
-       */
-
-      assert.notStrictEqual = function (act, exp, msg) {
-        new Assertion(act, msg).to.not.equal(exp);
-      };
-
-      /**
-       * ### .deepEqual(actual, expected, [message])
-       *
-       * Asserts that `actual` is deeply equal to `expected`.
-       *
-       *     assert.deepEqual({ tea: 'green' }, { tea: 'green' });
-       *
-       * @name deepEqual
-       * @param {Mixed} actual
-       * @param {Mixed} expected
-       * @param {String} message
-       * @api public
-       */
-
-      assert.deepEqual = function (act, exp, msg) {
-        new Assertion(act, msg).to.eql(exp);
-      };
-
-      /**
-       * ### .notDeepEqual(actual, expected, [message])
-       *
-       * Assert that `actual` is not deeply equal to `expected`.
-       *
-       *     assert.notDeepEqual({ tea: 'green' }, { tea: 'jasmine' });
-       *
-       * @name notDeepEqual
-       * @param {Mixed} actual
-       * @param {Mixed} expected
-       * @param {String} message
-       * @api public
-       */
-
-      assert.notDeepEqual = function (act, exp, msg) {
-        new Assertion(act, msg).to.not.eql(exp);
-      };
-
-      /**
-       * ### .isTrue(value, [message])
-       *
-       * Asserts that `value` is true.
-       *
-       *     var teaServed = true;
-       *     assert.isTrue(teaServed, 'the tea has been served');
-       *
-       * @name isTrue
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isTrue = function (val, msg) {
-        new Assertion(val, msg).is['true'];
-      };
-
-      /**
-       * ### .isFalse(value, [message])
-       *
-       * Asserts that `value` is false.
-       *
-       *     var teaServed = false;
-       *     assert.isFalse(teaServed, 'no tea yet? hmm...');
-       *
-       * @name isFalse
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isFalse = function (val, msg) {
-        new Assertion(val, msg).is['false'];
-      };
-
-      /**
-       * ### .isNull(value, [message])
-       *
-       * Asserts that `value` is null.
-       *
-       *     assert.isNull(err, 'there was no error');
-       *
-       * @name isNull
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isNull = function (val, msg) {
-        new Assertion(val, msg).to.equal(null);
-      };
-
-      /**
-       * ### .isNotNull(value, [message])
-       *
-       * Asserts that `value` is not null.
-       *
-       *     var tea = 'tasty chai';
-       *     assert.isNotNull(tea, 'great, time for tea!');
-       *
-       * @name isNotNull
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isNotNull = function (val, msg) {
-        new Assertion(val, msg).to.not.equal(null);
-      };
-
-      /**
-       * ### .isUndefined(value, [message])
-       *
-       * Asserts that `value` is `undefined`.
-       *
-       *     var tea;
-       *     assert.isUndefined(tea, 'no tea defined');
-       *
-       * @name isUndefined
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isUndefined = function (val, msg) {
-        new Assertion(val, msg).to.equal(undefined);
-      };
-
-      /**
-       * ### .isDefined(value, [message])
-       *
-       * Asserts that `value` is not `undefined`.
-       *
-       *     var tea = 'cup of chai';
-       *     assert.isDefined(tea, 'tea has been defined');
-       *
-       * @name isUndefined
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isDefined = function (val, msg) {
-        new Assertion(val, msg).to.not.equal(undefined);
-      };
-
-      /**
-       * ### .isFunction(value, [message])
-       *
-       * Asserts that `value` is a function.
-       *
-       *     function serveTea() { return 'cup of tea'; };
-       *     assert.isFunction(serveTea, 'great, we can have tea now');
-       *
-       * @name isFunction
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isFunction = function (val, msg) {
-        new Assertion(val, msg).to.be.a('function');
-      };
-
-      /**
-       * ### .isNotFunction(value, [message])
-       *
-       * Asserts that `value` is _not_ a function.
-       *
-       *     var serveTea = [ 'heat', 'pour', 'sip' ];
-       *     assert.isNotFunction(serveTea, 'great, we have listed the steps');
-       *
-       * @name isNotFunction
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isNotFunction = function (val, msg) {
-        new Assertion(val, msg).to.not.be.a('function');
-      };
-
-      /**
-       * ### .isObject(value, [message])
-       *
-       * Asserts that `value` is an object (as revealed by
-       * `Object.prototype.toString`).
-       *
-       *     var selection = { name: 'Chai', serve: 'with spices' };
-       *     assert.isObject(selection, 'tea selection is an object');
-       *
-       * @name isObject
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isObject = function (val, msg) {
-        new Assertion(val, msg).to.be.a('object');
-      };
-
-      /**
-       * ### .isNotObject(value, [message])
-       *
-       * Asserts that `value` is _not_ an object.
-       *
-       *     var selection = 'chai'
-       *     assert.isObject(selection, 'tea selection is not an object');
-       *     assert.isObject(null, 'null is not an object');
-       *
-       * @name isNotObject
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isNotObject = function (val, msg) {
-        new Assertion(val, msg).to.not.be.a('object');
-      };
-
-      /**
-       * ### .isArray(value, [message])
-       *
-       * Asserts that `value` is an array.
-       *
-       *     var menu = [ 'green', 'chai', 'oolong' ];
-       *     assert.isArray(menu, 'what kind of tea do we want?');
-       *
-       * @name isArray
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isArray = function (val, msg) {
-        new Assertion(val, msg).to.be.an('array');
-      };
-
-      /**
-       * ### .isNotArray(value, [message])
-       *
-       * Asserts that `value` is _not_ an array.
-       *
-       *     var menu = 'green|chai|oolong';
-       *     assert.isNotArray(menu, 'what kind of tea do we want?');
-       *
-       * @name isNotArray
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isNotArray = function (val, msg) {
-        new Assertion(val, msg).to.not.be.an('array');
-      };
-
-      /**
-       * ### .isString(value, [message])
-       *
-       * Asserts that `value` is a string.
-       *
-       *     var teaOrder = 'chai';
-       *     assert.isString(teaOrder, 'order placed');
-       *
-       * @name isString
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isString = function (val, msg) {
-        new Assertion(val, msg).to.be.a('string');
-      };
-
-      /**
-       * ### .isNotString(value, [message])
-       *
-       * Asserts that `value` is _not_ a string.
-       *
-       *     var teaOrder = 4;
-       *     assert.isNotString(teaOrder, 'order placed');
-       *
-       * @name isNotString
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isNotString = function (val, msg) {
-        new Assertion(val, msg).to.not.be.a('string');
-      };
-
-      /**
-       * ### .isNumber(value, [message])
-       *
-       * Asserts that `value` is a number.
-       *
-       *     var cups = 2;
-       *     assert.isNumber(cups, 'how many cups');
-       *
-       * @name isNumber
-       * @param {Number} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isNumber = function (val, msg) {
-        new Assertion(val, msg).to.be.a('number');
-      };
-
-      /**
-       * ### .isNotNumber(value, [message])
-       *
-       * Asserts that `value` is _not_ a number.
-       *
-       *     var cups = '2 cups please';
-       *     assert.isNotNumber(cups, 'how many cups');
-       *
-       * @name isNotNumber
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isNotNumber = function (val, msg) {
-        new Assertion(val, msg).to.not.be.a('number');
-      };
-
-      /**
-       * ### .isBoolean(value, [message])
-       *
-       * Asserts that `value` is a boolean.
-       *
-       *     var teaReady = true
-       *       , teaServed = false;
-       *
-       *     assert.isBoolean(teaReady, 'is the tea ready');
-       *     assert.isBoolean(teaServed, 'has tea been served');
-       *
-       * @name isBoolean
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isBoolean = function (val, msg) {
-        new Assertion(val, msg).to.be.a('boolean');
-      };
-
-      /**
-       * ### .isNotBoolean(value, [message])
-       *
-       * Asserts that `value` is _not_ a boolean.
-       *
-       *     var teaReady = 'yep'
-       *       , teaServed = 'nope';
-       *
-       *     assert.isNotBoolean(teaReady, 'is the tea ready');
-       *     assert.isNotBoolean(teaServed, 'has tea been served');
-       *
-       * @name isNotBoolean
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.isNotBoolean = function (val, msg) {
-        new Assertion(val, msg).to.not.be.a('boolean');
-      };
-
-      /**
-       * ### .typeOf(value, name, [message])
-       *
-       * Asserts that `value`'s type is `name`, as determined by
-       * `Object.prototype.toString`.
-       *
-       *     assert.typeOf({ tea: 'chai' }, 'object', 'we have an object');
-       *     assert.typeOf(['chai', 'jasmine'], 'array', 'we have an array');
-       *     assert.typeOf('tea', 'string', 'we have a string');
-       *     assert.typeOf(/tea/, 'regexp', 'we have a regular expression');
-       *     assert.typeOf(null, 'null', 'we have a null');
-       *     assert.typeOf(undefined, 'undefined', 'we have an undefined');
-       *
-       * @name typeOf
-       * @param {Mixed} value
-       * @param {String} name
-       * @param {String} message
-       * @api public
-       */
-
-      assert.typeOf = function (val, type, msg) {
-        new Assertion(val, msg).to.be.a(type);
-      };
-
-      /**
-       * ### .notTypeOf(value, name, [message])
-       *
-       * Asserts that `value`'s type is _not_ `name`, as determined by
-       * `Object.prototype.toString`.
-       *
-       *     assert.notTypeOf('tea', 'number', 'strings are not numbers');
-       *
-       * @name notTypeOf
-       * @param {Mixed} value
-       * @param {String} typeof name
-       * @param {String} message
-       * @api public
-       */
-
-      assert.notTypeOf = function (val, type, msg) {
-        new Assertion(val, msg).to.not.be.a(type);
-      };
-
-      /**
-       * ### .instanceOf(object, constructor, [message])
-       *
-       * Asserts that `value` is an instance of `constructor`.
-       *
-       *     var Tea = function (name) { this.name = name; }
-       *       , chai = new Tea('chai');
-       *
-       *     assert.instanceOf(chai, Tea, 'chai is an instance of tea');
-       *
-       * @name instanceOf
-       * @param {Object} object
-       * @param {Constructor} constructor
-       * @param {String} message
-       * @api public
-       */
-
-      assert.instanceOf = function (val, type, msg) {
-        new Assertion(val, msg).to.be.instanceOf(type);
-      };
-
-      /**
-       * ### .notInstanceOf(object, constructor, [message])
-       *
-       * Asserts `value` is not an instance of `constructor`.
-       *
-       *     var Tea = function (name) { this.name = name; }
-       *       , chai = new String('chai');
-       *
-       *     assert.notInstanceOf(chai, Tea, 'chai is not an instance of tea');
-       *
-       * @name notInstanceOf
-       * @param {Object} object
-       * @param {Constructor} constructor
-       * @param {String} message
-       * @api public
-       */
-
-      assert.notInstanceOf = function (val, type, msg) {
-        new Assertion(val, msg).to.not.be.instanceOf(type);
-      };
-
-      /**
-       * ### .include(haystack, needle, [message])
-       *
-       * Asserts that `haystack` includes `needle`. Works
-       * for strings and arrays.
-       *
-       *     assert.include('foobar', 'bar', 'foobar contains string "bar"');
-       *     assert.include([ 1, 2, 3 ], 3, 'array contains value');
-       *
-       * @name include
-       * @param {Array|String} haystack
-       * @param {Mixed} needle
-       * @param {String} message
-       * @api public
-       */
-
-      assert.include = function (exp, inc, msg) {
-        var obj = new Assertion(exp, msg);
-
-        if (Array.isArray(exp)) {
-          obj.to.include(inc);
-        } else if ('string' === typeof exp) {
-          obj.to.contain.string(inc);
-        }
-      };
-
-      /**
-       * ### .match(value, regexp, [message])
-       *
-       * Asserts that `value` matches the regular expression `regexp`.
-       *
-       *     assert.match('foobar', /^foo/, 'regexp matches');
-       *
-       * @name match
-       * @param {Mixed} value
-       * @param {RegExp} regexp
-       * @param {String} message
-       * @api public
-       */
-
-      assert.match = function (exp, re, msg) {
-        new Assertion(exp, msg).to.match(re);
-      };
-
-      /**
-       * ### .notMatch(value, regexp, [message])
-       *
-       * Asserts that `value` does not match the regular expression `regexp`.
-       *
-       *     assert.notMatch('foobar', /^foo/, 'regexp does not match');
-       *
-       * @name notMatch
-       * @param {Mixed} value
-       * @param {RegExp} regexp
-       * @param {String} message
-       * @api public
-       */
-
-      assert.notMatch = function (exp, re, msg) {
-        new Assertion(exp, msg).to.not.match(re);
-      };
-
-      /**
-       * ### .property(object, property, [message])
-       *
-       * Asserts that `object` has a property named by `property`.
-       *
-       *     assert.property({ tea: { green: 'matcha' }}, 'tea');
-       *
-       * @name property
-       * @param {Object} object
-       * @param {String} property
-       * @param {String} message
-       * @api public
-       */
-
-      assert.property = function (obj, prop, msg) {
-        new Assertion(obj, msg).to.have.property(prop);
-      };
-
-      /**
-       * ### .notProperty(object, property, [message])
-       *
-       * Asserts that `object` does _not_ have a property named by `property`.
-       *
-       *     assert.notProperty({ tea: { green: 'matcha' }}, 'coffee');
-       *
-       * @name notProperty
-       * @param {Object} object
-       * @param {String} property
-       * @param {String} message
-       * @api public
-       */
-
-      assert.notProperty = function (obj, prop, msg) {
-        new Assertion(obj, msg).to.not.have.property(prop);
-      };
-
-      /**
-       * ### .deepProperty(object, property, [message])
-       *
-       * Asserts that `object` has a property named by `property`, which can be a
-       * string using dot- and bracket-notation for deep reference.
-       *
-       *     assert.deepProperty({ tea: { green: 'matcha' }}, 'tea.green');
-       *
-       * @name deepProperty
-       * @param {Object} object
-       * @param {String} property
-       * @param {String} message
-       * @api public
-       */
-
-      assert.deepProperty = function (obj, prop, msg) {
-        new Assertion(obj, msg).to.have.deep.property(prop);
-      };
-
-      /**
-       * ### .notDeepProperty(object, property, [message])
-       *
-       * Asserts that `object` does _not_ have a property named by `property`, which
-       * can be a string using dot- and bracket-notation for deep reference.
-       *
-       *     assert.notDeepProperty({ tea: { green: 'matcha' }}, 'tea.oolong');
-       *
-       * @name notDeepProperty
-       * @param {Object} object
-       * @param {String} property
-       * @param {String} message
-       * @api public
-       */
-
-      assert.notDeepProperty = function (obj, prop, msg) {
-        new Assertion(obj, msg).to.not.have.deep.property(prop);
-      };
-
-      /**
-       * ### .propertyVal(object, property, value, [message])
-       *
-       * Asserts that `object` has a property named by `property` with value given
-       * by `value`.
-       *
-       *     assert.propertyVal({ tea: 'is good' }, 'tea', 'is good');
-       *
-       * @name propertyVal
-       * @param {Object} object
-       * @param {String} property
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.propertyVal = function (obj, prop, val, msg) {
-        new Assertion(obj, msg).to.have.property(prop, val);
-      };
-
-      /**
-       * ### .propertyNotVal(object, property, value, [message])
-       *
-       * Asserts that `object` has a property named by `property`, but with a value
-       * different from that given by `value`.
-       *
-       *     assert.propertyNotVal({ tea: 'is good' }, 'tea', 'is bad');
-       *
-       * @name propertyNotVal
-       * @param {Object} object
-       * @param {String} property
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.propertyNotVal = function (obj, prop, val, msg) {
-        new Assertion(obj, msg).to.not.have.property(prop, val);
-      };
-
-      /**
-       * ### .deepPropertyVal(object, property, value, [message])
-       *
-       * Asserts that `object` has a property named by `property` with value given
-       * by `value`. `property` can use dot- and bracket-notation for deep
-       * reference.
-       *
-       *     assert.deepPropertyVal({ tea: { green: 'matcha' }}, 'tea.green', 'matcha');
-       *
-       * @name deepPropertyVal
-       * @param {Object} object
-       * @param {String} property
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.deepPropertyVal = function (obj, prop, val, msg) {
-        new Assertion(obj, msg).to.have.deep.property(prop, val);
-      };
-
-      /**
-       * ### .deepPropertyNotVal(object, property, value, [message])
-       *
-       * Asserts that `object` has a property named by `property`, but with a value
-       * different from that given by `value`. `property` can use dot- and
-       * bracket-notation for deep reference.
-       *
-       *     assert.deepPropertyNotVal({ tea: { green: 'matcha' }}, 'tea.green', 'konacha');
-       *
-       * @name deepPropertyNotVal
-       * @param {Object} object
-       * @param {String} property
-       * @param {Mixed} value
-       * @param {String} message
-       * @api public
-       */
-
-      assert.deepPropertyNotVal = function (obj, prop, val, msg) {
-        new Assertion(obj, msg).to.not.have.deep.property(prop, val);
-      };
-
-      /**
-       * ### .lengthOf(object, length, [message])
-       *
-       * Asserts that `object` has a `length` property with the expected value.
-       *
-       *     assert.lengthOf([1,2,3], 3, 'array has length of 3');
-       *     assert.lengthOf('foobar', 5, 'string has length of 6');
-       *
-       * @name lengthOf
-       * @param {Mixed} object
-       * @param {Number} length
-       * @param {String} message
-       * @api public
-       */
-
-      assert.lengthOf = function (exp, len, msg) {
-        new Assertion(exp, msg).to.have.length(len);
-      };
-
-      /**
-       * ### .throws(function, [constructor/regexp], [message])
-       *
-       * Asserts that `function` will throw an error that is an instance of
-       * `constructor`, or alternately that it will throw an error with message
-       * matching `regexp`.
-       *
-       *     assert.throw(fn, ReferenceError, 'function throws a reference error');
-       *
-       * @name throws
-       * @alias throw
-       * @alias Throw
-       * @param {Function} function
-       * @param {ErrorConstructor} constructor
-       * @param {RegExp} regexp
-       * @param {String} message
-       * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
-       * @api public
-       */
-
-      assert.Throw = function (fn, type, msg) {
-        if ('string' === typeof type) {
-          msg = type;
-          type = null;
-        }
-
-        new Assertion(fn, msg).to.Throw(type);
-      };
-
-      /**
-       * ### .doesNotThrow(function, [constructor/regexp], [message])
-       *
-       * Asserts that `function` will _not_ throw an error that is an instance of
-       * `constructor`, or alternately that it will not throw an error with message
-       * matching `regexp`.
-       *
-       *     assert.doesNotThrow(fn, Error, 'function does not throw');
-       *
-       * @name doesNotThrow
-       * @param {Function} function
-       * @param {ErrorConstructor} constructor
-       * @param {RegExp} regexp
-       * @param {String} message
-       * @see https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Error#Error_types
-       * @api public
-       */
-
-      assert.doesNotThrow = function (fn, type, msg) {
-        if ('string' === typeof type) {
-          msg = type;
-          type = null;
-        }
-
-        new Assertion(fn, msg).to.not.Throw(type);
-      };
-
-      /**
-       * ### .operator(val1, operator, val2, [message])
-       *
-       * Compares two values using `operator`.
-       *
-       *     assert.operator(1, '<', 2, 'everything is ok');
-       *     assert.operator(1, '>', 2, 'this will fail');
-       *
-       * @name operator
-       * @param {Mixed} val1
-       * @param {String} operator
-       * @param {Mixed} val2
-       * @param {String} message
-       * @api public
-       */
-
-      assert.operator = function (val, operator, val2, msg) {
-        if (
-          !~['==', '===', '>', '>=', '<', '<=', '!=', '!=='].indexOf(operator)
-        ) {
-          throw new Error('Invalid operator "' + operator + '"');
-        }
-        var test = new Assertion(eval(val + operator + val2), msg);
-        test.assert(
-          true === flag(test, 'object'),
-          'expected ' +
-            util.inspect(val) +
-            ' to be ' +
-            operator +
-            ' ' +
-            util.inspect(val2),
-          'expected ' +
-            util.inspect(val) +
-            ' to not be ' +
-            operator +
-            ' ' +
-            util.inspect(val2)
-        );
-      };
-
-      /*!
-       * Undocumented / untested
-       */
-
-      assert.ifError = function (val, msg) {
-        new Assertion(val, msg).to.not.be.ok;
-      };
-
-      /*!
-       * Aliases.
-       */
-
-      (function alias(name, as) {
-        assert[as] = assert[name];
-        return alias;
-      })('Throw', 'throw')('Throw', 'throws');
-    };
-  }); // module: interface/assert.js
-
-  require.register('interface/expect.js', function (module, exports, require) {
-    /*!
-     * chai
-     * Copyright(c) 2011-2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    module.exports = function (chai, util) {
-      chai.expect = function (val, message) {
-        return new chai.Assertion(val, message);
-      };
-    };
-  }); // module: interface/expect.js
-
-  require.register('interface/should.js', function (module, exports, require) {
-    /*!
-     * chai
-     * Copyright(c) 2011-2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    module.exports = function (chai, util) {
-      var Assertion = chai.Assertion;
-
-      function loadShould() {
-        // modify Object.prototype to have `should`
-        Object.defineProperty(Object.prototype, 'should', {
-          set: function () {},
-          get: function () {
-            if (this instanceof String || this instanceof Number) {
-              return new Assertion(this.constructor(this));
-            } else if (this instanceof Boolean) {
-              return new Assertion(this == true);
-            }
-            return new Assertion(this);
-          },
-          configurable: true,
-        });
-
-        var should = {};
-
-        should.equal = function (val1, val2) {
-          new Assertion(val1).to.equal(val2);
-        };
-
-        should.Throw = function (fn, errt, errs) {
-          new Assertion(fn).to.Throw(errt, errs);
-        };
-
-        should.exist = function (val) {
-          new Assertion(val).to.exist;
-        };
-
-        // negation
-        should.not = {};
-
-        should.not.equal = function (val1, val2) {
-          new Assertion(val1).to.not.equal(val2);
-        };
-
-        should.not.Throw = function (fn, errt, errs) {
-          new Assertion(fn).to.not.Throw(errt, errs);
-        };
-
-        should.not.exist = function (val) {
-          new Assertion(val).to.not.exist;
-        };
-
-        should['throw'] = should['Throw'];
-        should.not['throw'] = should.not['Throw'];
-
-        return should;
-      }
-
-      chai.should = loadShould;
-      chai.Should = loadShould;
-    };
-  }); // module: interface/should.js
-
-  require.register(
-    'utils/addChainableMethod.js',
-    function (module, exports, require) {
-      /*!
-       * Chai - addChainingMethod utility
-       * Copyright(c) 2012 Jake Luer <[email protected]>
-       * MIT Licensed
-       */
-
-      /*!
-       * Module dependencies
-       */
-
-      var transferFlags = require('./transferFlags');
-
-      /**
-       * ### addChainableMethod (ctx, name, method, chainingBehavior)
-       *
-       * Adds a method to an object, such that the method can also be chained.
-       *
-       *     utils.addChainableMethod(chai.Assertion.prototype, 'foo', function (str) {
-       *       var obj = utils.flag(this, 'object');
-       *       new chai.Assertion(obj).to.be.equal(str);
-       *     });
-       *
-       * Can also be accessed directly from `chai.Assertion`.
-       *
-       *     chai.Assertion.addChainableMethod('foo', fn, chainingBehavior);
-       *
-       * The result can then be used as both a method assertion, executing both `method` and
-       * `chainingBehavior`, or as a language chain, which only executes `chainingBehavior`.
-       *
-       *     expect(fooStr).to.be.foo('bar');
-       *     expect(fooStr).to.be.foo.equal('foo');
-       *
-       * @param {Object} ctx object to which the method is added
-       * @param {String} name of method to add
-       * @param {Function} method function to be used for `name`, when called
-       * @param {Function} chainingBehavior function to be called every time the property is accessed
-       * @name addChainableMethod
-       * @api public
-       */
-
-      module.exports = function (ctx, name, method, chainingBehavior) {
-        if (typeof chainingBehavior !== 'function')
-          chainingBehavior = function () {};
-
-        Object.defineProperty(ctx, name, {
-          get: function () {
-            chainingBehavior.call(this);
-
-            var assert = function () {
-              var result = method.apply(this, arguments);
-              return result === undefined ? this : result;
-            };
-
-            // Re-enumerate every time to better accomodate plugins.
-            var asserterNames = Object.getOwnPropertyNames(ctx);
-            asserterNames.forEach(function (asserterName) {
-              var pd = Object.getOwnPropertyDescriptor(ctx, asserterName),
-                functionProtoPD = Object.getOwnPropertyDescriptor(
-                  Function.prototype,
-                  asserterName
-                );
-              // Avoid trying to overwrite things that we can't, like `length` and `arguments`.
-              if (functionProtoPD && !functionProtoPD.configurable) return;
-              if (asserterName === 'arguments') return; // @see chaijs/chai/issues/69
-              Object.defineProperty(assert, asserterName, pd);
-            });
-
-            transferFlags(this, assert);
-            return assert;
-          },
-          configurable: true,
-        });
-      };
-    }
-  ); // module: utils/addChainableMethod.js
-
-  require.register('utils/addMethod.js', function (module, exports, require) {
-    /*!
-     * Chai - addMethod utility
-     * Copyright(c) 2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    /**
-     * ### addMethod (ctx, name, method)
-     *
-     * Adds a method to the prototype of an object.
-     *
-     *     utils.addMethod(chai.Assertion.prototype, 'foo', function (str) {
-     *       var obj = utils.flag(this, 'object');
-     *       new chai.Assertion(obj).to.be.equal(str);
-     *     });
-     *
-     * Can also be accessed directly from `chai.Assertion`.
-     *
-     *     chai.Assertion.addMethod('foo', fn);
-     *
-     * Then can be used as any other assertion.
-     *
-     *     expect(fooStr).to.be.foo('bar');
-     *
-     * @param {Object} ctx object to which the method is added
-     * @param {String} name of method to add
-     * @param {Function} method function to be used for name
-     * @name addMethod
-     * @api public
-     */
-
-    module.exports = function (ctx, name, method) {
-      ctx[name] = function () {
-        var result = method.apply(this, arguments);
-        return result === undefined ? this : result;
-      };
-    };
-  }); // module: utils/addMethod.js
-
-  require.register('utils/addProperty.js', function (module, exports, require) {
-    /*!
-     * Chai - addProperty utility
-     * Copyright(c) 2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    /**
-     * ### addProperty (ctx, name, getter)
-     *
-     * Adds a property to the prototype of an object.
-     *
-     *     utils.addProperty(chai.Assertion.prototype, 'foo', function () {
-     *       var obj = utils.flag(this, 'object');
-     *       new chai.Assertion(obj).to.be.instanceof(Foo);
-     *     });
-     *
-     * Can also be accessed directly from `chai.Assertion`.
-     *
-     *     chai.Assertion.addProperty('foo', fn);
-     *
-     * Then can be used as any other assertion.
-     *
-     *     expect(myFoo).to.be.foo;
-     *
-     * @param {Object} ctx object to which the property is added
-     * @param {String} name of property to add
-     * @param {Function} getter function to be used for name
-     * @name addProperty
-     * @api public
-     */
-
-    module.exports = function (ctx, name, getter) {
-      Object.defineProperty(ctx, name, {
-        get: function () {
-          var result = getter.call(this);
-          return result === undefined ? this : result;
-        },
-        configurable: true,
-      });
-    };
-  }); // module: utils/addProperty.js
-
-  require.register('utils/eql.js', function (module, exports, require) {
-    // This is directly from Node.js assert
-    // https://github.com/joyent/node/blob/f8c335d0caf47f16d31413f89aa28eda3878e3aa/lib/assert.js
-
-    module.exports = _deepEqual;
-
-    // For browser implementation
-    if (!Buffer) {
-      var Buffer = {
-        isBuffer: function () {
-          return false;
-        },
-      };
-    }
-
-    function _deepEqual(actual, expected) {
-      // 7.1. All identical values are equivalent, as determined by ===.
-      if (actual === expected) {
-        return true;
-      } else if (Buffer.isBuffer(actual) && Buffer.isBuffer(expected)) {
-        if (actual.length != expected.length) return false;
-
-        for (var i = 0; i < actual.length; i++) {
-          if (actual[i] !== expected[i]) return false;
-        }
-
-        return true;
-
-        // 7.2. If the expected value is a Date object, the actual value is
-        // equivalent if it is also a Date object that refers to the same time.
-      } else if (actual instanceof Date && expected instanceof Date) {
-        return actual.getTime() === expected.getTime();
-
-        // 7.3. Other pairs that do not both pass typeof value == 'object',
-        // equivalence is determined by ==.
-      } else if (typeof actual != 'object' && typeof expected != 'object') {
-        return actual === expected;
-
-        // 7.4. For all other Object pairs, including Array objects, equivalence is
-        // determined by having the same number of owned properties (as verified
-        // with Object.prototype.hasOwnProperty.call), the same set of keys
-        // (although not necessarily the same order), equivalent values for every
-        // corresponding key, and an identical 'prototype' property. Note: this
-        // accounts for both named and indexed properties on Arrays.
-      } else {
-        return objEquiv(actual, expected);
-      }
-    }
-
-    function isUndefinedOrNull(value) {
-      return value === null || value === undefined;
-    }
-
-    function isArguments(object) {
-      return Object.prototype.toString.call(object) == '[object Arguments]';
-    }
-
-    function objEquiv(a, b) {
-      if (isUndefinedOrNull(a) || isUndefinedOrNull(b)) return false;
-      // an identical 'prototype' property.
-      if (a.prototype !== b.prototype) return false;
-      //~~~I've managed to break Object.keys through screwy arguments passing.
-      //   Converting to array solves the problem.
-      if (isArguments(a)) {
-        if (!isArguments(b)) {
-          return false;
-        }
-        a = pSlice.call(a);
-        b = pSlice.call(b);
-        return _deepEqual(a, b);
-      }
-      try {
-        var ka = Object.keys(a),
-          kb = Object.keys(b),
-          key,
-          i;
-      } catch (e) {
-        //happens when one is a string literal and the other isn't
-        return false;
-      }
-      // having the same number of owned properties (keys incorporates
-      // hasOwnProperty)
-      if (ka.length != kb.length) return false;
-      //the same set of keys (although not necessarily the same order),
-      ka.sort();
-      kb.sort();
-      //~~~cheap key test
-      for (i = ka.length - 1; i >= 0; i--) {
-        if (ka[i] != kb[i]) return false;
-      }
-      //equivalent values for every corresponding key, and
-      //~~~possibly expensive deep test
-      for (i = ka.length - 1; i >= 0; i--) {
-        key = ka[i];
-        if (!_deepEqual(a[key], b[key])) return false;
-      }
-      return true;
-    }
-  }); // module: utils/eql.js
-
-  require.register('utils/flag.js', function (module, exports, require) {
-    /*!
-     * Chai - flag utility
-     * Copyright(c) 2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    /**
-     * ### flag(object ,key, [value])
-     *
-     * Get or set a flag value on an object. If a
-     * value is provided it will be set, else it will
-     * return the currently set value or `undefined` if
-     * the value is not set.
-     *
-     *     utils.flag(this, 'foo', 'bar'); // setter
-     *     utils.flag(this, 'foo'); // getter, returns `bar`
-     *
-     * @param {Object} object (constructed Assertion
-     * @param {String} key
-     * @param {Mixed} value (optional)
-     * @name flag
-     * @api private
-     */
-
-    module.exports = function (obj, key, value) {
-      var flags = obj.__flags || (obj.__flags = Object.create(null));
-      if (arguments.length === 3) {
-        flags[key] = value;
-      } else {
-        return flags[key];
-      }
-    };
-  }); // module: utils/flag.js
-
-  require.register('utils/getActual.js', function (module, exports, require) {
-    /*!
-     * Chai - getActual utility
-     * Copyright(c) 2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    /**
-     * # getActual(object, [actual])
-     *
-     * Returns the `actual` value for an Assertion
-     *
-     * @param {Object} object (constructed Assertion)
-     * @param {Arguments} chai.Assertion.prototype.assert arguments
-     */
-
-    module.exports = function (obj, args) {
-      var actual = args[4];
-      return 'undefined' !== actual ? actual : obj.obj;
-    };
-  }); // module: utils/getActual.js
-
-  require.register('utils/getMessage.js', function (module, exports, require) {
-    /*!
-     * Chai - message composition utility
-     * Copyright(c) 2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    /*!
-     * Module dependencies
-     */
-
-    var flag = require('./flag'),
-      getActual = require('./getActual'),
-      inspect = require('./inspect');
-
-    /**
-     * # getMessage(object, message, negateMessage)
-     *
-     * Construct the error message based on flags
-     * and template tags. Template tags will return
-     * a stringified inspection of the object referenced.
-     *
-     * Message template tags:
-     * - `#{this}` current asserted object
-     * - `#{act}` actual value
-     * - `#{exp}` expected value
-     *
-     * @param {Object} object (constructed Assertion)
-     * @param {Arguments} chai.Assertion.prototype.assert arguments
-     */
-
-    module.exports = function (obj, args) {
-      var negate = flag(obj, 'negate'),
-        val = flag(obj, 'object'),
-        expected = args[3],
-        actual = getActual(obj, args),
-        msg = negate ? args[2] : args[1],
-        flagMsg = flag(obj, 'message');
-
-      msg = msg || '';
-      msg = msg
-        .replace(/#{this}/g, inspect(val))
-        .replace(/#{act}/g, inspect(actual))
-        .replace(/#{exp}/g, inspect(expected));
-
-      return flagMsg ? flagMsg + ': ' + msg : msg;
-    };
-  }); // module: utils/getMessage.js
-
-  require.register('utils/getName.js', function (module, exports, require) {
-    /*!
-     * Chai - getName utility
-     * Copyright(c) 2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    /**
-     * # getName(func)
-     *
-     * Gets the name of a function, in a cross-browser way.
-     *
-     * @param {Function} a function (usually a constructor)
-     */
-
-    module.exports = function (func) {
-      if (func.name) return func.name;
-
-      var match = /^\s?function ([^(]*)\(/.exec(func);
-      return match && match[1] ? match[1] : '';
-    };
-  }); // module: utils/getName.js
-
-  require.register(
-    'utils/getPathValue.js',
-    function (module, exports, require) {
-      /*!
-       * Chai - getPathValue utility
-       * Copyright(c) 2012 Jake Luer <[email protected]>
-       * @see https://github.com/logicalparadox/filtr
-       * MIT Licensed
-       */
-
-      /**
-       * ### .getPathValue(path, object)
-       *
-       * This allows the retrieval of values in an
-       * object given a string path.
-       *
-       *     var obj = {
-       *         prop1: {
-       *             arr: ['a', 'b', 'c']
-       *           , str: 'Hello'
-       *         }
-       *       , prop2: {
-       *             arr: [ { nested: 'Universe' } ]
-       *           , str: 'Hello again!'
-       *         }
-       *     }
-       *
-       * The following would be the results.
-       *
-       *     getPathValue('prop1.str', obj); // Hello
-       *     getPathValue('prop1.att[2]', obj); // b
-       *     getPathValue('prop2.arr[0].nested', obj); // Universe
-       *
-       * @param {String} path
-       * @param {Object} object
-       * @returns {Object} value or `undefined`
-       * @name getPathValue
-       * @api public
-       */
-
-      var getPathValue = (module.exports = function (path, obj) {
-        var parsed = parsePath(path);
-        return _getPathValue(parsed, obj);
-      });
-
-      /*!
-       * ## parsePath(path)
-       *
-       * Helper function used to parse string object
-       * paths. Use in conjunction with `_getPathValue`.
-       *
-       *      var parsed = parsePath('myobject.property.subprop');
-       *
-       * ### Paths:
-       *
-       * * Can be as near infinitely deep and nested
-       * * Arrays are also valid using the formal `myobject.document[3].property`.
-       *
-       * @param {String} path
-       * @returns {Object} parsed
-       * @api private
-       */
-
-      function parsePath(path) {
-        var parts = path.split('.').filter(Boolean);
-        return parts.map(function (value) {
-          var re = /([A-Za-z0-9]+)\[(\d+)\]$/,
-            mArr = re.exec(value),
-            val;
-          if (mArr) val = { p: mArr[1], i: parseFloat(mArr[2]) };
-          return val || value;
-        });
-      }
-
-      /*!
-       * ## _getPathValue(parsed, obj)
-       *
-       * Helper companion function for `.parsePath` that returns
-       * the value located at the parsed address.
-       *
-       *      var value = getPathValue(parsed, obj);
-       *
-       * @param {Object} parsed definition from `parsePath`.
-       * @param {Object} object to search against
-       * @returns {Object|Undefined} value
-       * @api private
-       */
-
-      function _getPathValue(parsed, obj) {
-        var tmp = obj,
-          res;
-        for (var i = 0, l = parsed.length; i < l; i++) {
-          var part = parsed[i];
-          if (tmp) {
-            if ('object' === typeof part && tmp[part.p]) {
-              tmp = tmp[part.p][part.i];
-            } else {
-              tmp = tmp[part];
-            }
-            if (i == l - 1) res = tmp;
-          } else {
-            res = undefined;
-          }
-        }
-        return res;
-      }
-    }
-  ); // module: utils/getPathValue.js
-
-  require.register('utils/index.js', function (module, exports, require) {
-    /*!
-     * chai
-     * Copyright(c) 2011 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    /*!
-     * Main exports
-     */
-
-    var exports = (module.exports = {});
-
-    /*!
-     * test utility
-     */
-
-    exports.test = require('./test');
-
-    /*!
-     * message utility
-     */
-
-    exports.getMessage = require('./getMessage');
-
-    /*!
-     * actual utility
-     */
-
-    exports.getActual = require('./getActual');
-
-    /*!
-     * Inspect util
-     */
-
-    exports.inspect = require('./inspect');
-
-    /*!
-     * Flag utility
-     */
-
-    exports.flag = require('./flag');
-
-    /*!
-     * Flag transferring utility
-     */
-
-    exports.transferFlags = require('./transferFlags');
-
-    /*!
-     * Deep equal utility
-     */
-
-    exports.eql = require('./eql');
-
-    /*!
-     * Deep path value
-     */
-
-    exports.getPathValue = require('./getPathValue');
-
-    /*!
-     * Function name
-     */
-
-    exports.getName = require('./getName');
-
-    /*!
-     * add Property
-     */
-
-    exports.addProperty = require('./addProperty');
-
-    /*!
-     * add Method
-     */
-
-    exports.addMethod = require('./addMethod');
-
-    /*!
-     * overwrite Property
-     */
-
-    exports.overwriteProperty = require('./overwriteProperty');
-
-    /*!
-     * overwrite Method
-     */
-
-    exports.overwriteMethod = require('./overwriteMethod');
-
-    /*!
-     * Add a chainable method
-     */
-
-    exports.addChainableMethod = require('./addChainableMethod');
-  }); // module: utils/index.js
-
-  require.register('utils/inspect.js', function (module, exports, require) {
-    // This is (almost) directly from Node.js utils
-    // https://github.com/joyent/node/blob/f8c335d0caf47f16d31413f89aa28eda3878e3aa/lib/util.js
-
-    var getName = require('./getName');
-
-    module.exports = inspect;
-
-    /**
-     * Echos the value of a value. Trys to print the value out
-     * in the best way possible given the different types.
-     *
-     * @param {Object} obj The object to print out.
-     * @param {Boolean} showHidden Flag that shows hidden (not enumerable)
-     *    properties of objects.
-     * @param {Number} depth Depth in which to descend in object. Default is 2.
-     * @param {Boolean} colors Flag to turn on ANSI escape codes to color the
-     *    output. Default is false (no coloring).
-     */
-    function inspect(obj, showHidden, depth, colors) {
-      var ctx = {
-        showHidden: showHidden,
-        seen: [],
-        stylize: function (str) {
-          return str;
-        },
-      };
-      return formatValue(ctx, obj, typeof depth === 'undefined' ? 2 : depth);
-    }
-
-    function formatValue(ctx, value, recurseTimes) {
-      // Provide a hook for user-specified inspect functions.
-      // Check that value is an object with an inspect function on it
-      if (
-        value &&
-        typeof value.inspect === 'function' &&
-        // Filter out the util module, it's inspect function is special
-        value.inspect !== exports.inspect &&
-        // Also filter out any prototype objects using the circular check.
-        !(value.constructor && value.constructor.prototype === value)
-      ) {
-        return value.inspect(recurseTimes);
-      }
-
-      // Primitive types cannot have properties
-      var primitive = formatPrimitive(ctx, value);
-      if (primitive) {
-        return primitive;
-      }
-
-      // Look up the keys of the object.
-      var visibleKeys = Object.keys(value);
-      var keys = ctx.showHidden
-        ? Object.getOwnPropertyNames(value)
-        : visibleKeys;
-
-      // Some type of object without properties can be shortcutted.
-      // In IE, errors have a single `stack` property, or if they are vanilla `Error`,
-      // a `stack` plus `description` property; ignore those for consistency.
-      if (
-        keys.length === 0 ||
-        (isError(value) &&
-          ((keys.length === 1 && keys[0] === 'stack') ||
-            (keys.length === 2 &&
-              keys[0] === 'description' &&
-              keys[1] === 'stack')))
-      ) {
-        if (typeof value === 'function') {
-          var name = getName(value);
-          var nameSuffix = name ? ': ' + name : '';
-          return ctx.stylize('[Function' + nameSuffix + ']', 'special');
-        }
-        if (isRegExp(value)) {
-          return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
-        }
-        if (isDate(value)) {
-          return ctx.stylize(Date.prototype.toUTCString.call(value), 'date');
-        }
-        if (isError(value)) {
-          return formatError(value);
-        }
-      }
-
-      var base = '',
-        array = false,
-        braces = ['{', '}'];
-
-      // Make Array say that they are Array
-      if (isArray(value)) {
-        array = true;
-        braces = ['[', ']'];
-      }
-
-      // Make functions say that they are functions
-      if (typeof value === 'function') {
-        var n = value.name ? ': ' + value.name : '';
-        base = ' [Function' + n + ']';
-      }
-
-      // Make RegExps say that they are RegExps
-      if (isRegExp(value)) {
-        base = ' ' + RegExp.prototype.toString.call(value);
-      }
-
-      // Make dates with properties first say the date
-      if (isDate(value)) {
-        base = ' ' + Date.prototype.toUTCString.call(value);
-      }
-
-      // Make error with message first say the error
-      if (isError(value)) {
-        return formatError(value);
-      }
-
-      if (keys.length === 0 && (!array || value.length == 0)) {
-        return braces[0] + base + braces[1];
-      }
-
-      if (recurseTimes < 0) {
-        if (isRegExp(value)) {
-          return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
-        } else {
-          return ctx.stylize('[Object]', 'special');
-        }
-      }
-
-      ctx.seen.push(value);
-
-      var output;
-      if (array) {
-        output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
-      } else {
-        output = keys.map(function (key) {
-          return formatProperty(
-            ctx,
-            value,
-            recurseTimes,
-            visibleKeys,
-            key,
-            array
-          );
-        });
-      }
-
-      ctx.seen.pop();
-
-      return reduceToSingleString(output, base, braces);
-    }
-
-    function formatPrimitive(ctx, value) {
-      switch (typeof value) {
-        case 'undefined':
-          return ctx.stylize('undefined', 'undefined');
-
-        case 'string':
-          var simple =
-            "'" +
-            JSON.stringify(value)
-              .replace(/^"|"$/g, '')
-              .replace(/'/g, "\\'")
-              .replace(/\\"/g, '"') +
-            "'";
-          return ctx.stylize(simple, 'string');
-
-        case 'number':
-          return ctx.stylize('' + value, 'number');
-
-        case 'boolean':
-          return ctx.stylize('' + value, 'boolean');
-      }
-      // For some reason typeof null is "object", so special case here.
-      if (value === null) {
-        return ctx.stylize('null', 'null');
-      }
-    }
-
-    function formatError(value) {
-      return '[' + Error.prototype.toString.call(value) + ']';
-    }
-
-    function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
-      var output = [];
-      for (var i = 0, l = value.length; i < l; ++i) {
-        if (Object.prototype.hasOwnProperty.call(value, String(i))) {
-          output.push(
-            formatProperty(
-              ctx,
-              value,
-              recurseTimes,
-              visibleKeys,
-              String(i),
-              true
-            )
-          );
-        } else {
-          output.push('');
-        }
-      }
-      keys.forEach(function (key) {
-        if (!key.match(/^\d+$/)) {
-          output.push(
-            formatProperty(ctx, value, recurseTimes, visibleKeys, key, true)
-          );
-        }
-      });
-      return output;
-    }
-
-    function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
-      var name, str;
-      if (value.__lookupGetter__) {
-        if (value.__lookupGetter__(key)) {
-          if (value.__lookupSetter__(key)) {
-            str = ctx.stylize('[Getter/Setter]', 'special');
-          } else {
-            str = ctx.stylize('[Getter]', 'special');
-          }
-        } else {
-          if (value.__lookupSetter__(key)) {
-            str = ctx.stylize('[Setter]', 'special');
-          }
-        }
-      }
-      if (visibleKeys.indexOf(key) < 0) {
-        name = '[' + key + ']';
-      }
-      if (!str) {
-        if (ctx.seen.indexOf(value[key]) < 0) {
-          if (recurseTimes === null) {
-            str = formatValue(ctx, value[key], null);
-          } else {
-            str = formatValue(ctx, value[key], recurseTimes - 1);
-          }
-          if (str.indexOf('\n') > -1) {
-            if (array) {
-              str = str
-                .split('\n')
-                .map(function (line) {
-                  return '  ' + line;
-                })
-                .join('\n')
-                .substr(2);
-            } else {
-              str =
-                '\n' +
-                str
-                  .split('\n')
-                  .map(function (line) {
-                    return '   ' + line;
-                  })
-                  .join('\n');
-            }
-          }
-        } else {
-          str = ctx.stylize('[Circular]', 'special');
-        }
-      }
-      if (typeof name === 'undefined') {
-        if (array && key.match(/^\d+$/)) {
-          return str;
-        }
-        name = JSON.stringify('' + key);
-        if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
-          name = name.substr(1, name.length - 2);
-          name = ctx.stylize(name, 'name');
-        } else {
-          name = name
-            .replace(/'/g, "\\'")
-            .replace(/\\"/g, '"')
-            .replace(/(^"|"$)/g, "'");
-          name = ctx.stylize(name, 'string');
-        }
-      }
-
-      return name + ': ' + str;
-    }
-
-    function reduceToSingleString(output, base, braces) {
-      var numLinesEst = 0;
-      var length = output.reduce(function (prev, cur) {
-        numLinesEst++;
-        if (cur.indexOf('\n') >= 0) numLinesEst++;
-        return prev + cur.length + 1;
-      }, 0);
-
-      if (length > 60) {
-        return (
-          braces[0] +
-          (base === '' ? '' : base + '\n ') +
-          ' ' +
-          output.join(',\n  ') +
-          ' ' +
-          braces[1]
-        );
-      }
-
-      return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
-    }
-
-    function isArray(ar) {
-      return (
-        Array.isArray(ar) ||
-        (typeof ar === 'object' && objectToString(ar) === '[object Array]')
-      );
-    }
-
-    function isRegExp(re) {
-      return typeof re === 'object' && objectToString(re) === '[object RegExp]';
-    }
-
-    function isDate(d) {
-      return typeof d === 'object' && objectToString(d) === '[object Date]';
-    }
-
-    function isError(e) {
-      return typeof e === 'object' && objectToString(e) === '[object Error]';
-    }
-
-    function objectToString(o) {
-      return Object.prototype.toString.call(o);
-    }
-  }); // module: utils/inspect.js
-
-  require.register(
-    'utils/overwriteMethod.js',
-    function (module, exports, require) {
-      /*!
-       * Chai - overwriteMethod utility
-       * Copyright(c) 2012 Jake Luer <[email protected]>
-       * MIT Licensed
-       */
-
-      /**
-       * ### overwriteMethod (ctx, name, fn)
-       *
-       * Overwrites an already existing method and provides
-       * access to previous function. Must return function
-       * to be used for name.
-       *
-       *     utils.overwriteMethod(chai.Assertion.prototype, 'equal', function (_super) {
-       *       return function (str) {
-       *         var obj = utils.flag(this, 'object');
-       *         if (obj instanceof Foo) {
-       *           new chai.Assertion(obj.value).to.equal(str);
-       *         } else {
-       *           _super.apply(this, arguments);
-       *         }
-       *       }
-       *     });
-       *
-       * Can also be accessed directly from `chai.Assertion`.
-       *
-       *     chai.Assertion.overwriteMethod('foo', fn);
-       *
-       * Then can be used as any other assertion.
-       *
-       *     expect(myFoo).to.equal('bar');
-       *
-       * @param {Object} ctx object whose method is to be overwritten
-       * @param {String} name of method to overwrite
-       * @param {Function} method function that returns a function to be used for name
-       * @name overwriteMethod
-       * @api public
-       */
-
-      module.exports = function (ctx, name, method) {
-        var _method = ctx[name],
-          _super = function () {
-            return this;
-          };
-
-        if (_method && 'function' === typeof _method) _super = _method;
-
-        ctx[name] = function () {
-          var result = method(_super).apply(this, arguments);
-          return result === undefined ? this : result;
-        };
-      };
-    }
-  ); // module: utils/overwriteMethod.js
-
-  require.register(
-    'utils/overwriteProperty.js',
-    function (module, exports, require) {
-      /*!
-       * Chai - overwriteProperty utility
-       * Copyright(c) 2012 Jake Luer <[email protected]>
-       * MIT Licensed
-       */
-
-      /**
-       * ### overwriteProperty (ctx, name, fn)
-       *
-       * Overwrites an already existing property getter and provides
-       * access to previous value. Must return function to use as getter.
-       *
-       *     utils.overwriteProperty(chai.Assertion.prototype, 'ok', function (_super) {
-       *       return function () {
-       *         var obj = utils.flag(this, 'object');
-       *         if (obj instanceof Foo) {
-       *           new chai.Assertion(obj.name).to.equal('bar');
-       *         } else {
-       *           _super.call(this);
-       *         }
-       *       }
-       *     });
-       *
-       *
-       * Can also be accessed directly from `chai.Assertion`.
-       *
-       *     chai.Assertion.overwriteProperty('foo', fn);
-       *
-       * Then can be used as any other assertion.
-       *
-       *     expect(myFoo).to.be.ok;
-       *
-       * @param {Object} ctx object whose property is to be overwritten
-       * @param {String} name of property to overwrite
-       * @param {Function} getter function that returns a getter function to be used for name
-       * @name overwriteProperty
-       * @api public
-       */
-
-      module.exports = function (ctx, name, getter) {
-        var _get = Object.getOwnPropertyDescriptor(ctx, name),
-          _super = function () {};
-
-        if (_get && 'function' === typeof _get.get) _super = _get.get;
-
-        Object.defineProperty(ctx, name, {
-          get: function () {
-            var result = getter(_super).call(this);
-            return result === undefined ? this : result;
-          },
-          configurable: true,
-        });
-      };
-    }
-  ); // module: utils/overwriteProperty.js
-
-  require.register('utils/test.js', function (module, exports, require) {
-    /*!
-     * Chai - test utility
-     * Copyright(c) 2012 Jake Luer <[email protected]>
-     * MIT Licensed
-     */
-
-    /*!
-     * Module dependencies
-     */
-
-    var flag = require('./flag');
-
-    /**
-     * # test(object, expression)
-     *
-     * Test and object for expression.
-     *
-     * @param {Object} object (constructed Assertion)
-     * @param {Arguments} chai.Assertion.prototype.assert arguments
-     */
-
-    module.exports = function (obj, args) {
-      var negate = flag(obj, 'negate'),
-        expr = args[0];
-      return negate ? !expr : expr;
-    };
-  }); // module: utils/test.js
-
-  require.register(
-    'utils/transferFlags.js',
-    function (module, exports, require) {
-      /*!
-       * Chai - transferFlags utility
-       * Copyright(c) 2012 Jake Luer <[email protected]>
-       * MIT Licensed
-       */
-
-      /**
-       * ### transferFlags(assertion, object, includeAll = true)
-       *
-       * Transfer all the flags for `assertion` to `object`. If
-       * `includeAll` is set to `false`, then the base Chai
-       * assertion flags (namely `object`, `ssfi`, and `message`)
-       * will not be transferred.
-       *
-       *
-       *     var newAssertion = new Assertion();
-       *     utils.transferFlags(assertion, newAssertion);
-       *
-       *     var anotherAssertion = new Assertion(myObj);
-       *     utils.transferFlags(assertion, anotherAssertion, false);
-       *
-       * @param {Assertion} assertion the assertion to transfer the flags from
-       * @param {Object} object the object to transfer the flags too; usually a new assertion
-       * @param {Boolean} includeAll
-       * @name getAllFlags
-       * @api private
-       */
-
-      module.exports = function (assertion, object, includeAll) {
-        var flags =
-          assertion.__flags || (assertion.__flags = Object.create(null));
-
-        if (!object.__flags) {
-          object.__flags = Object.create(null);
-        }
-
-        includeAll = arguments.length === 3 ? includeAll : true;
-
-        for (var flag in flags) {
-          if (
-            includeAll ||
-            (flag !== 'object' && flag !== 'ssfi' && flag != 'message')
-          ) {
-            object.__flags[flag] = flags[flag];
-          }
-        }
-      };
-    }
-  ); // module: utils/transferFlags.js
-
-  return require('chai');
-});
diff --git a/test/support/function-helpers.js b/test/support/function-helpers.js
deleted file mode 100644
index f8dfe68e..00000000
--- a/test/support/function-helpers.js
+++ /dev/null
@@ -1,59 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../../lib').faker;
-}
-
-var functionHelpers = {};
-
-module.exports = functionHelpers;
-
-var IGNORED_MODULES = [
-  'locales',
-  'locale',
-  'localeFallback',
-  'definitions',
-  'fake',
-  'helpers',
-  'mersenne',
-];
-var IGNORED_METHODS = {
-  system: ['directoryPath', 'filePath'], // these are TODOs
-};
-
-function isTestableModule(mod) {
-  return IGNORED_MODULES.indexOf(mod) === -1;
-}
-
-function isMethodOf(mod) {
-  return function (meth) {
-    return typeof faker[mod][meth] === 'function';
-  };
-}
-
-function isTestableMethod(mod) {
-  return function (meth) {
-    return !(mod in IGNORED_METHODS && IGNORED_METHODS[mod].indexOf(meth) >= 0);
-  };
-}
-
-function both(pred1, pred2) {
-  return function (value) {
-    return pred1(value) && pred2(value);
-  };
-}
-
-// Basic smoke tests to make sure each method is at least implemented and returns a value.
-
-functionHelpers.modulesList = function modulesList() {
-  var modules = Object.keys(faker)
-    .filter(isTestableModule)
-    .reduce(function (result, mod) {
-      result[mod] = Object.keys(faker[mod]).filter(
-        both(isMethodOf(mod), isTestableMethod(mod))
-      );
-      return result;
-    }, {});
-
-  return modules;
-};
diff --git a/test/support/luhnCheck.js b/test/support/luhnCheck.js
deleted file mode 100644
index 9a5b8538..00000000
--- a/test/support/luhnCheck.js
+++ /dev/null
@@ -1,22 +0,0 @@
-module.exports = function (number) {
-  number = number.replace(/\D/g, '');
-  var split = number.split('');
-  split = split.map(function (num) {
-    return parseInt(num);
-  });
-  var check = split.pop();
-  split.reverse();
-  split = split.map(function (num, index) {
-    if (index % 2 === 0) {
-      num *= 2;
-      if (num > 9) {
-        num -= 9;
-      }
-    }
-    return num;
-  });
-  var sum = split.reduce(function (prev, curr) {
-    return prev + curr;
-  });
-  return sum % 10 === check;
-};
diff --git a/test/support/luhnCheck.ts b/test/support/luhnCheck.ts
new file mode 100644
index 00000000..fb4e0bb0
--- /dev/null
+++ b/test/support/luhnCheck.ts
@@ -0,0 +1,18 @@
+export function luhnCheck(number: string): boolean {
+  number = number.replace(/\D/g, '');
+  let split: string[] | number[] = number.split('');
+  split = split.map((num) => parseInt(num));
+  const check = split.pop();
+  split.reverse();
+  split = split.map((num, index) => {
+    if (index % 2 === 0) {
+      num *= 2;
+      if (num > 9) {
+        num -= 9;
+      }
+    }
+    return num;
+  });
+  const sum = split.reduce((prev, curr) => prev + curr);
+  return sum % 10 === check;
+}
diff --git a/test/support/sinon-1.5.2.js b/test/support/sinon-1.5.2.js
deleted file mode 100644
index 82939b65..00000000
--- a/test/support/sinon-1.5.2.js
+++ /dev/null
@@ -1,4524 +0,0 @@
-/**
- * Sinon.JS 1.5.2, 2012/11/27
- *
- * @author Christian Johansen ([email protected])
- * @author Contributors: https://github.com/cjohansen/Sinon.JS/blob/master/AUTHORS
- *
- * (The BSD License)
- *
- * Copyright (c) 2010-2012, Christian Johansen, [email protected]
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification,
- * are permitted provided that the following conditions are met:
- *
- *     * Redistributions of source code must retain the above copyright notice,
- *       this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above copyright notice,
- *       this list of conditions and the following disclaimer in the documentation
- *       and/or other materials provided with the distribution.
- *     * Neither the name of Christian Johansen nor the names of his contributors
- *       may be used to endorse or promote products derived from this software
- *       without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-var sinon = function () {
-  'use strict';
-
-  var buster = (function (setTimeout, B) {
-    var isNode = typeof require == 'function' && typeof module == 'object';
-    var div = typeof document != 'undefined' && document.createElement('div');
-    var F = function () {};
-
-    var buster = {
-      bind: function bind(obj, methOrProp) {
-        var method =
-          typeof methOrProp == 'string' ? obj[methOrProp] : methOrProp;
-        var args = Array.prototype.slice.call(arguments, 2);
-        return function () {
-          var allArgs = args.concat(Array.prototype.slice.call(arguments));
-          return method.apply(obj, allArgs);
-        };
-      },
-
-      partial: function partial(fn) {
-        var args = [].slice.call(arguments, 1);
-        return function () {
-          return fn.apply(this, args.concat([].slice.call(arguments)));
-        };
-      },
-
-      create: function create(object) {
-        F.prototype = object;
-        return new F();
-      },
-
-      extend: function extend(target) {
-        if (!target) {
-          return;
-        }
-        for (var i = 1, l = arguments.length, prop; i < l; ++i) {
-          for (prop in arguments[i]) {
-            target[prop] = arguments[i][prop];
-          }
-        }
-        return target;
-      },
-
-      nextTick: function nextTick(callback) {
-        if (typeof process != 'undefined' && process.nextTick) {
-          return process.nextTick(callback);
-        }
-        setTimeout(callback, 0);
-      },
-
-      functionName: function functionName(func) {
-        if (!func) return '';
-        if (func.displayName) return func.displayName;
-        if (func.name) return func.name;
-        var matches = func.toString().match(/function\s+([^\(]+)/m);
-        return (matches && matches[1]) || '';
-      },
-
-      isNode: function isNode(obj) {
-        if (!div) return false;
-        try {
-          obj.appendChild(div);
-          obj.removeChild(div);
-        } catch (e) {
-          return false;
-        }
-        return true;
-      },
-
-      isElement: function isElement(obj) {
-        return obj && obj.nodeType === 1 && buster.isNode(obj);
-      },
-
-      isArray: function isArray(arr) {
-        return Object.prototype.toString.call(arr) == '[object Array]';
-      },
-
-      flatten: function flatten(arr) {
-        var result = [],
-          arr = arr || [];
-        for (var i = 0, l = arr.length; i < l; ++i) {
-          result = result.concat(
-            buster.isArray(arr[i]) ? flatten(arr[i]) : arr[i]
-          );
-        }
-        return result;
-      },
-
-      each: function each(arr, callback) {
-        for (var i = 0, l = arr.length; i < l; ++i) {
-          callback(arr[i]);
-        }
-      },
-
-      map: function map(arr, callback) {
-        var results = [];
-        for (var i = 0, l = arr.length; i < l; ++i) {
-          results.push(callback(arr[i]));
-        }
-        return results;
-      },
-
-      parallel: function parallel(fns, callback) {
-        function cb(err, res) {
-          if (typeof callback == 'function') {
-            callback(err, res);
-            callback = null;
-          }
-        }
-        if (fns.length == 0) {
-          return cb(null, []);
-        }
-        var remaining = fns.length,
-          results = [];
-        function makeDone(num) {
-          return function done(err, result) {
-            if (err) {
-              return cb(err);
-            }
-            results[num] = result;
-            if (--remaining == 0) {
-              cb(null, results);
-            }
-          };
-        }
-        for (var i = 0, l = fns.length; i < l; ++i) {
-          fns[i](makeDone(i));
-        }
-      },
-
-      series: function series(fns, callback) {
-        function cb(err, res) {
-          if (typeof callback == 'function') {
-            callback(err, res);
-          }
-        }
-        var remaining = fns.slice();
-        var results = [];
-        function callNext() {
-          if (remaining.length == 0) return cb(null, results);
-          var promise = remaining.shift()(next);
-          if (promise && typeof promise.then == 'function') {
-            promise.then(buster.partial(next, null), next);
-          }
-        }
-        function next(err, result) {
-          if (err) return cb(err);
-          results.push(result);
-          callNext();
-        }
-        callNext();
-      },
-
-      countdown: function countdown(num, done) {
-        return function () {
-          if (--num == 0) done();
-        };
-      },
-    };
-
-    if (
-      typeof process === 'object' &&
-      typeof require === 'function' &&
-      typeof module === 'object'
-    ) {
-      var crypto = require('crypto');
-      var path = require('path');
-
-      buster.tmpFile = function (fileName) {
-        var hashed = crypto.createHash('sha1');
-        hashed.update(fileName);
-        var tmpfileName = hashed.digest('hex');
-
-        if (process.platform == 'win32') {
-          return path.join(process.env['TEMP'], tmpfileName);
-        } else {
-          return path.join('/tmp', tmpfileName);
-        }
-      };
-    }
-
-    if (Array.prototype.some) {
-      buster.some = function (arr, fn, thisp) {
-        return arr.some(fn, thisp);
-      };
-    } else {
-      // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/some
-      buster.some = function (arr, fun, thisp) {
-        if (arr == null) {
-          throw new TypeError();
-        }
-        arr = Object(arr);
-        var len = arr.length >>> 0;
-        if (typeof fun !== 'function') {
-          throw new TypeError();
-        }
-
-        for (var i = 0; i < len; i++) {
-          if (arr.hasOwnProperty(i) && fun.call(thisp, arr[i], i, arr)) {
-            return true;
-          }
-        }
-
-        return false;
-      };
-    }
-
-    if (Array.prototype.filter) {
-      buster.filter = function (arr, fn, thisp) {
-        return arr.filter(fn, thisp);
-      };
-    } else {
-      // https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/filter
-      buster.filter = function (fn, thisp) {
-        if (this == null) {
-          throw new TypeError();
-        }
-
-        var t = Object(this);
-        var len = t.length >>> 0;
-        if (typeof fn != 'function') {
-          throw new TypeError();
-        }
-
-        var res = [];
-        for (var i = 0; i < len; i++) {
-          if (i in t) {
-            var val = t[i]; // in case fun mutates this
-            if (fn.call(thisp, val, i, t)) {
-              res.push(val);
-            }
-          }
-        }
-
-        return res;
-      };
-    }
-
-    if (isNode) {
-      module.exports = buster;
-      buster.eventEmitter = require('./buster-event-emitter');
-      Object.defineProperty(buster, 'defineVersionGetter', {
-        get: function () {
-          return require('./define-version-getter');
-        },
-      });
-    }
-
-    return buster.extend(B || {}, buster);
-  })(setTimeout, buster);
-  if (typeof buster === 'undefined') {
-    var buster = {};
-  }
-
-  if (typeof module === 'object' && typeof require === 'function') {
-    buster = require('buster-core');
-  }
-
-  buster.format = buster.format || {};
-  buster.format.excludeConstructors = ['Object', /^.$/];
-  buster.format.quoteStrings = true;
-
-  buster.format.ascii = (function () {
-    var hasOwn = Object.prototype.hasOwnProperty;
-
-    var specialObjects = [];
-    if (typeof global != 'undefined') {
-      specialObjects.push({ obj: global, value: '[object global]' });
-    }
-    if (typeof document != 'undefined') {
-      specialObjects.push({ obj: document, value: '[object HTMLDocument]' });
-    }
-    if (typeof window != 'undefined') {
-      specialObjects.push({ obj: window, value: '[object Window]' });
-    }
-
-    function keys(object) {
-      var k = (Object.keys && Object.keys(object)) || [];
-
-      if (k.length == 0) {
-        for (var prop in object) {
-          if (hasOwn.call(object, prop)) {
-            k.push(prop);
-          }
-        }
-      }
-
-      return k.sort();
-    }
-
-    function isCircular(object, objects) {
-      if (typeof object != 'object') {
-        return false;
-      }
-
-      for (var i = 0, l = objects.length; i < l; ++i) {
-        if (objects[i] === object) {
-          return true;
-        }
-      }
-
-      return false;
-    }
-
-    function ascii(object, processed, indent) {
-      if (typeof object == 'string') {
-        var quote = typeof this.quoteStrings != 'boolean' || this.quoteStrings;
-        return processed || quote ? '"' + object + '"' : object;
-      }
-
-      if (typeof object == 'function' && !(object instanceof RegExp)) {
-        return ascii.func(object);
-      }
-
-      processed = processed || [];
-
-      if (isCircular(object, processed)) {
-        return '[Circular]';
-      }
-
-      if (Object.prototype.toString.call(object) == '[object Array]') {
-        return ascii.array.call(this, object, processed);
-      }
-
-      if (!object) {
-        return '' + object;
-      }
-
-      if (buster.isElement(object)) {
-        return ascii.element(object);
-      }
-
-      if (
-        typeof object.toString == 'function' &&
-        object.toString !== Object.prototype.toString
-      ) {
-        return object.toString();
-      }
-
-      for (var i = 0, l = specialObjects.length; i < l; i++) {
-        if (object === specialObjects[i].obj) {
-          return specialObjects[i].value;
-        }
-      }
-
-      return ascii.object.call(this, object, processed, indent);
-    }
-
-    ascii.func = function (func) {
-      return 'function ' + buster.functionName(func) + '() {}';
-    };
-
-    ascii.array = function (array, processed) {
-      processed = processed || [];
-      processed.push(array);
-      var pieces = [];
-
-      for (var i = 0, l = array.length; i < l; ++i) {
-        pieces.push(ascii.call(this, array[i], processed));
-      }
-
-      return '[' + pieces.join(', ') + ']';
-    };
-
-    ascii.object = function (object, processed, indent) {
-      processed = processed || [];
-      processed.push(object);
-      indent = indent || 0;
-      var pieces = [],
-        properties = keys(object),
-        prop,
-        str,
-        obj;
-      var is = '';
-      var length = 3;
-
-      for (var i = 0, l = indent; i < l; ++i) {
-        is += ' ';
-      }
-
-      for (i = 0, l = properties.length; i < l; ++i) {
-        prop = properties[i];
-        obj = object[prop];
-
-        if (isCircular(obj, processed)) {
-          str = '[Circular]';
-        } else {
-          str = ascii.call(this, obj, processed, indent + 2);
-        }
-
-        str = (/\s/.test(prop) ? '"' + prop + '"' : prop) + ': ' + str;
-        length += str.length;
-        pieces.push(str);
-      }
-
-      var cons = ascii.constructorName.call(this, object);
-      var prefix = cons ? '[' + cons + '] ' : '';
-
-      return length + indent > 80
-        ? prefix + '{\n  ' + is + pieces.join(',\n  ' + is) + '\n' + is + '}'
-        : prefix + '{ ' + pieces.join(', ') + ' }';
-    };
-
-    ascii.element = function (element) {
-      var tagName = element.tagName.toLowerCase();
-      var attrs = element.attributes,
-        attribute,
-        pairs = [],
-        attrName;
-
-      for (var i = 0, l = attrs.length; i < l; ++i) {
-        attribute = attrs.item(i);
-        attrName = attribute.nodeName.toLowerCase().replace('html:', '');
-
-        if (attrName == 'contenteditable' && attribute.nodeValue == 'inherit') {
-          continue;
-        }
-
-        if (!!attribute.nodeValue) {
-          pairs.push(attrName + '="' + attribute.nodeValue + '"');
-        }
-      }
-
-      var formatted = '<' + tagName + (pairs.length > 0 ? ' ' : '');
-      var content = element.innerHTML;
-
-      if (content.length > 20) {
-        content = content.substr(0, 20) + '[...]';
-      }
-
-      var res =
-        formatted + pairs.join(' ') + '>' + content + '</' + tagName + '>';
-
-      return res.replace(/ contentEditable="inherit"/, '');
-    };
-
-    ascii.constructorName = function (object) {
-      var name = buster.functionName(object && object.constructor);
-      var excludes =
-        this.excludeConstructors || buster.format.excludeConstructors || [];
-
-      for (var i = 0, l = excludes.length; i < l; ++i) {
-        if (typeof excludes[i] == 'string' && excludes[i] == name) {
-          return '';
-        } else if (excludes[i].test && excludes[i].test(name)) {
-          return '';
-        }
-      }
-
-      return name;
-    };
-
-    return ascii;
-  })();
-
-  if (typeof module != 'undefined') {
-    module.exports = buster.format;
-  }
-  /*jslint eqeqeq: false, onevar: false, forin: true, nomen: false, regexp: false, plusplus: false*/
-  /*global module, require, __dirname, document*/
-  /**
-   * Sinon core utilities. For internal use only.
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  var sinon = (function (buster) {
-    var div = typeof document != 'undefined' && document.createElement('div');
-    var hasOwn = Object.prototype.hasOwnProperty;
-
-    function isDOMNode(obj) {
-      var success = false;
-
-      try {
-        obj.appendChild(div);
-        success = div.parentNode == obj;
-      } catch (e) {
-        return false;
-      } finally {
-        try {
-          obj.removeChild(div);
-        } catch (e) {
-          // Remove failed, not much we can do about that
-        }
-      }
-
-      return success;
-    }
-
-    function isElement(obj) {
-      return div && obj && obj.nodeType === 1 && isDOMNode(obj);
-    }
-
-    function isFunction(obj) {
-      return (
-        typeof obj === 'function' ||
-        !!(obj && obj.constructor && obj.call && obj.apply)
-      );
-    }
-
-    function mirrorProperties(target, source) {
-      for (var prop in source) {
-        if (!hasOwn.call(target, prop)) {
-          target[prop] = source[prop];
-        }
-      }
-    }
-
-    var sinon = {
-      wrapMethod: function wrapMethod(object, property, method) {
-        if (!object) {
-          throw new TypeError('Should wrap property of object');
-        }
-
-        if (typeof method != 'function') {
-          throw new TypeError('Method wrapper should be function');
-        }
-
-        var wrappedMethod = object[property];
-
-        if (!isFunction(wrappedMethod)) {
-          throw new TypeError(
-            'Attempted to wrap ' +
-              typeof wrappedMethod +
-              ' property ' +
-              property +
-              ' as function'
-          );
-        }
-
-        if (wrappedMethod.restore && wrappedMethod.restore.sinon) {
-          throw new TypeError(
-            'Attempted to wrap ' + property + ' which is already wrapped'
-          );
-        }
-
-        if (wrappedMethod.calledBefore) {
-          var verb = !!wrappedMethod.returns ? 'stubbed' : 'spied on';
-          throw new TypeError(
-            'Attempted to wrap ' + property + ' which is already ' + verb
-          );
-        }
-
-        // IE 8 does not support hasOwnProperty on the window object.
-        var owned = hasOwn.call(object, property);
-        object[property] = method;
-        method.displayName = property;
-
-        method.restore = function () {
-          // For prototype properties try to reset by delete first.
-          // If this fails (ex: localStorage on mobile safari) then force a reset
-          // via direct assignment.
-          if (!owned) {
-            delete object[property];
-          }
-          if (object[property] === method) {
-            object[property] = wrappedMethod;
-          }
-        };
-
-        method.restore.sinon = true;
-        mirrorProperties(method, wrappedMethod);
-
-        return method;
-      },
-
-      extend: function extend(target) {
-        for (var i = 1, l = arguments.length; i < l; i += 1) {
-          for (var prop in arguments[i]) {
-            if (arguments[i].hasOwnProperty(prop)) {
-              target[prop] = arguments[i][prop];
-            }
-
-            // DONT ENUM bug, only care about toString
-            if (
-              arguments[i].hasOwnProperty('toString') &&
-              arguments[i].toString != target.toString
-            ) {
-              target.toString = arguments[i].toString;
-            }
-          }
-        }
-
-        return target;
-      },
-
-      create: function create(proto) {
-        var F = function () {};
-        F.prototype = proto;
-        return new F();
-      },
-
-      deepEqual: function deepEqual(a, b) {
-        if (sinon.match && sinon.match.isMatcher(a)) {
-          return a.test(b);
-        }
-        if (typeof a != 'object' || typeof b != 'object') {
-          return a === b;
-        }
-
-        if (isElement(a) || isElement(b)) {
-          return a === b;
-        }
-
-        if (a === b) {
-          return true;
-        }
-
-        if ((a === null && b !== null) || (a !== null && b === null)) {
-          return false;
-        }
-
-        var aString = Object.prototype.toString.call(a);
-        if (aString != Object.prototype.toString.call(b)) {
-          return false;
-        }
-
-        if (aString == '[object Array]') {
-          if (a.length !== b.length) {
-            return false;
-          }
-
-          for (var i = 0, l = a.length; i < l; i += 1) {
-            if (!deepEqual(a[i], b[i])) {
-              return false;
-            }
-          }
-
-          return true;
-        }
-
-        var prop,
-          aLength = 0,
-          bLength = 0;
-
-        for (prop in a) {
-          aLength += 1;
-
-          if (!deepEqual(a[prop], b[prop])) {
-            return false;
-          }
-        }
-
-        for (prop in b) {
-          bLength += 1;
-        }
-
-        if (aLength != bLength) {
-          return false;
-        }
-
-        return true;
-      },
-
-      functionName: function functionName(func) {
-        var name = func.displayName || func.name;
-
-        // Use function decomposition as a last resort to get function
-        // name. Does not rely on function decomposition to work - if it
-        // doesn't debugging will be slightly less informative
-        // (i.e. toString will say 'spy' rather than 'myFunc').
-        if (!name) {
-          var matches = func.toString().match(/function ([^\s\(]+)/);
-          name = matches && matches[1];
-        }
-
-        return name;
-      },
-
-      functionToString: function toString() {
-        if (this.getCall && this.callCount) {
-          var thisValue,
-            prop,
-            i = this.callCount;
-
-          while (i--) {
-            thisValue = this.getCall(i).thisValue;
-
-            for (prop in thisValue) {
-              if (thisValue[prop] === this) {
-                return prop;
-              }
-            }
-          }
-        }
-
-        return this.displayName || 'sinon fake';
-      },
-
-      getConfig: function (custom) {
-        var config = {};
-        custom = custom || {};
-        var defaults = sinon.defaultConfig;
-
-        for (var prop in defaults) {
-          if (defaults.hasOwnProperty(prop)) {
-            config[prop] = custom.hasOwnProperty(prop)
-              ? custom[prop]
-              : defaults[prop];
-          }
-        }
-
-        return config;
-      },
-
-      format: function (val) {
-        return '' + val;
-      },
-
-      defaultConfig: {
-        injectIntoThis: true,
-        injectInto: null,
-        properties: ['spy', 'stub', 'mock', 'clock', 'server', 'requests'],
-        useFakeTimers: true,
-        useFakeServer: true,
-      },
-
-      timesInWords: function timesInWords(count) {
-        return (
-          (count == 1 && 'once') ||
-          (count == 2 && 'twice') ||
-          (count == 3 && 'thrice') ||
-          (count || 0) + ' times'
-        );
-      },
-
-      calledInOrder: function (spies) {
-        for (var i = 1, l = spies.length; i < l; i++) {
-          if (!spies[i - 1].calledBefore(spies[i])) {
-            return false;
-          }
-        }
-
-        return true;
-      },
-
-      orderByFirstCall: function (spies) {
-        return spies.sort(function (a, b) {
-          // uuid, won't ever be equal
-          var aCall = a.getCall(0);
-          var bCall = b.getCall(0);
-          var aId = (aCall && aCall.callId) || -1;
-          var bId = (bCall && bCall.callId) || -1;
-
-          return aId < bId ? -1 : 1;
-        });
-      },
-
-      log: function () {},
-
-      logError: function (label, err) {
-        var msg = label + ' threw exception: ';
-        sinon.log(msg + '[' + err.name + '] ' + err.message);
-        if (err.stack) {
-          sinon.log(err.stack);
-        }
-
-        setTimeout(function () {
-          err.message = msg + err.message;
-          throw err;
-        }, 0);
-      },
-
-      typeOf: function (value) {
-        if (value === null) {
-          return 'null';
-        } else if (value === undefined) {
-          return 'undefined';
-        }
-        var string = Object.prototype.toString.call(value);
-        return string.substring(8, string.length - 1).toLowerCase();
-      },
-    };
-
-    var isNode = typeof module == 'object' && typeof require == 'function';
-
-    if (isNode) {
-      try {
-        buster = { format: require('buster-format') };
-      } catch (e) {}
-      module.exports = sinon;
-      module.exports.spy = require('./sinon/spy');
-      module.exports.stub = require('./sinon/stub');
-      module.exports.mock = require('./sinon/mock');
-      module.exports.collection = require('./sinon/collection');
-      module.exports.assert = require('./sinon/assert');
-      module.exports.sandbox = require('./sinon/sandbox');
-      module.exports.test = require('./sinon/test');
-      module.exports.testCase = require('./sinon/test_case');
-      module.exports.assert = require('./sinon/assert');
-      module.exports.match = require('./sinon/match');
-    }
-
-    if (buster) {
-      var formatter = sinon.create(buster.format);
-      formatter.quoteStrings = false;
-      sinon.format = function () {
-        return formatter.ascii.apply(formatter, arguments);
-      };
-    } else if (isNode) {
-      try {
-        var util = require('util');
-        sinon.format = function (value) {
-          return typeof value == 'object' &&
-            value.toString === Object.prototype.toString
-            ? util.inspect(value)
-            : value;
-        };
-      } catch (e) {
-        /* Node, but no util module - would be very old, but better safe than
-             sorry */
-      }
-    }
-
-    return sinon;
-  })(typeof buster == 'object' && buster);
-
-  /* @depend ../sinon.js */
-  /*jslint eqeqeq: false, onevar: false, plusplus: false*/
-  /*global module, require, sinon*/
-  /**
-   * Match functions
-   *
-   * @author Maximilian Antoni ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2012 Maximilian Antoni
-   */
-
-  (function (sinon) {
-    var commonJSModule =
-      typeof module == 'object' && typeof require == 'function';
-
-    if (!sinon && commonJSModule) {
-      sinon = require('../sinon');
-    }
-
-    if (!sinon) {
-      return;
-    }
-
-    function assertType(value, type, name) {
-      var actual = sinon.typeOf(value);
-      if (actual !== type) {
-        throw new TypeError(
-          'Expected type of ' + name + ' to be ' + type + ', but was ' + actual
-        );
-      }
-    }
-
-    var matcher = {
-      toString: function () {
-        return this.message;
-      },
-    };
-
-    function isMatcher(object) {
-      return matcher.isPrototypeOf(object);
-    }
-
-    function matchObject(expectation, actual) {
-      if (actual === null || actual === undefined) {
-        return false;
-      }
-      for (var key in expectation) {
-        if (expectation.hasOwnProperty(key)) {
-          var exp = expectation[key];
-          var act = actual[key];
-          if (match.isMatcher(exp)) {
-            if (!exp.test(act)) {
-              return false;
-            }
-          } else if (sinon.typeOf(exp) === 'object') {
-            if (!matchObject(exp, act)) {
-              return false;
-            }
-          } else if (!sinon.deepEqual(exp, act)) {
-            return false;
-          }
-        }
-      }
-      return true;
-    }
-
-    matcher.or = function (m2) {
-      if (!isMatcher(m2)) {
-        throw new TypeError('Matcher expected');
-      }
-      var m1 = this;
-      var or = sinon.create(matcher);
-      or.test = function (actual) {
-        return m1.test(actual) || m2.test(actual);
-      };
-      or.message = m1.message + '.or(' + m2.message + ')';
-      return or;
-    };
-
-    matcher.and = function (m2) {
-      if (!isMatcher(m2)) {
-        throw new TypeError('Matcher expected');
-      }
-      var m1 = this;
-      var and = sinon.create(matcher);
-      and.test = function (actual) {
-        return m1.test(actual) && m2.test(actual);
-      };
-      and.message = m1.message + '.and(' + m2.message + ')';
-      return and;
-    };
-
-    var match = function (expectation, message) {
-      var m = sinon.create(matcher);
-      var type = sinon.typeOf(expectation);
-      switch (type) {
-        case 'object':
-          if (typeof expectation.test === 'function') {
-            m.test = function (actual) {
-              return expectation.test(actual) === true;
-            };
-            m.message = 'match(' + sinon.functionName(expectation.test) + ')';
-            return m;
-          }
-          var str = [];
-          for (var key in expectation) {
-            if (expectation.hasOwnProperty(key)) {
-              str.push(key + ': ' + expectation[key]);
-            }
-          }
-          m.test = function (actual) {
-            return matchObject(expectation, actual);
-          };
-          m.message = 'match(' + str.join(', ') + ')';
-          break;
-        case 'number':
-          m.test = function (actual) {
-            return expectation == actual;
-          };
-          break;
-        case 'string':
-          m.test = function (actual) {
-            if (typeof actual !== 'string') {
-              return false;
-            }
-            return actual.indexOf(expectation) !== -1;
-          };
-          m.message = 'match("' + expectation + '")';
-          break;
-        case 'regexp':
-          m.test = function (actual) {
-            if (typeof actual !== 'string') {
-              return false;
-            }
-            return expectation.test(actual);
-          };
-          break;
-        case 'function':
-          m.test = expectation;
-          if (message) {
-            m.message = message;
-          } else {
-            m.message = 'match(' + sinon.functionName(expectation) + ')';
-          }
-          break;
-        default:
-          m.test = function (actual) {
-            return sinon.deepEqual(expectation, actual);
-          };
-      }
-      if (!m.message) {
-        m.message = 'match(' + expectation + ')';
-      }
-      return m;
-    };
-
-    match.isMatcher = isMatcher;
-
-    match.any = match(function () {
-      return true;
-    }, 'any');
-
-    match.defined = match(function (actual) {
-      return actual !== null && actual !== undefined;
-    }, 'defined');
-
-    match.truthy = match(function (actual) {
-      return !!actual;
-    }, 'truthy');
-
-    match.falsy = match(function (actual) {
-      return !actual;
-    }, 'falsy');
-
-    match.same = function (expectation) {
-      return match(function (actual) {
-        return expectation === actual;
-      }, 'same(' + expectation + ')');
-    };
-
-    match.typeOf = function (type) {
-      assertType(type, 'string', 'type');
-      return match(function (actual) {
-        return sinon.typeOf(actual) === type;
-      }, 'typeOf("' + type + '")');
-    };
-
-    match.instanceOf = function (type) {
-      assertType(type, 'function', 'type');
-      return match(function (actual) {
-        return actual instanceof type;
-      }, 'instanceOf(' + sinon.functionName(type) + ')');
-    };
-
-    function createPropertyMatcher(propertyTest, messagePrefix) {
-      return function (property, value) {
-        assertType(property, 'string', 'property');
-        var onlyProperty = arguments.length === 1;
-        var message = messagePrefix + '("' + property + '"';
-        if (!onlyProperty) {
-          message += ', ' + value;
-        }
-        message += ')';
-        return match(function (actual) {
-          if (
-            actual === undefined ||
-            actual === null ||
-            !propertyTest(actual, property)
-          ) {
-            return false;
-          }
-          return onlyProperty || sinon.deepEqual(value, actual[property]);
-        }, message);
-      };
-    }
-
-    match.has = createPropertyMatcher(function (actual, property) {
-      if (typeof actual === 'object') {
-        return property in actual;
-      }
-      return actual[property] !== undefined;
-    }, 'has');
-
-    match.hasOwn = createPropertyMatcher(function (actual, property) {
-      return actual.hasOwnProperty(property);
-    }, 'hasOwn');
-
-    match.bool = match.typeOf('boolean');
-    match.number = match.typeOf('number');
-    match.string = match.typeOf('string');
-    match.object = match.typeOf('object');
-    match.func = match.typeOf('function');
-    match.array = match.typeOf('array');
-    match.regexp = match.typeOf('regexp');
-    match.date = match.typeOf('date');
-
-    if (commonJSModule) {
-      module.exports = match;
-    } else {
-      sinon.match = match;
-    }
-  })((typeof sinon == 'object' && sinon) || null);
-
-  /**
-   * @depend ../sinon.js
-   * @depend match.js
-   */
-  /*jslint eqeqeq: false, onevar: false, plusplus: false*/
-  /*global module, require, sinon*/
-  /**
-   * Spy functions
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  (function (sinon) {
-    var commonJSModule =
-      typeof module == 'object' && typeof require == 'function';
-    var spyCall;
-    var callId = 0;
-    var push = [].push;
-    var slice = Array.prototype.slice;
-
-    if (!sinon && commonJSModule) {
-      sinon = require('../sinon');
-    }
-
-    if (!sinon) {
-      return;
-    }
-
-    function spy(object, property) {
-      if (!property && typeof object == 'function') {
-        return spy.create(object);
-      }
-
-      if (!object && !property) {
-        return spy.create(function () {});
-      }
-
-      var method = object[property];
-      return sinon.wrapMethod(object, property, spy.create(method));
-    }
-
-    sinon.extend(
-      spy,
-      (function () {
-        function delegateToCalls(api, method, matchAny, actual, notCalled) {
-          api[method] = function () {
-            if (!this.called) {
-              if (notCalled) {
-                return notCalled.apply(this, arguments);
-              }
-              return false;
-            }
-
-            var currentCall;
-            var matches = 0;
-
-            for (var i = 0, l = this.callCount; i < l; i += 1) {
-              currentCall = this.getCall(i);
-
-              if (currentCall[actual || method].apply(currentCall, arguments)) {
-                matches += 1;
-
-                if (matchAny) {
-                  return true;
-                }
-              }
-            }
-
-            return matches === this.callCount;
-          };
-        }
-
-        function matchingFake(fakes, args, strict) {
-          if (!fakes) {
-            return;
-          }
-
-          var alen = args.length;
-
-          for (var i = 0, l = fakes.length; i < l; i++) {
-            if (fakes[i].matches(args, strict)) {
-              return fakes[i];
-            }
-          }
-        }
-
-        function incrementCallCount() {
-          this.called = true;
-          this.callCount += 1;
-          this.notCalled = false;
-          this.calledOnce = this.callCount == 1;
-          this.calledTwice = this.callCount == 2;
-          this.calledThrice = this.callCount == 3;
-        }
-
-        function createCallProperties() {
-          this.firstCall = this.getCall(0);
-          this.secondCall = this.getCall(1);
-          this.thirdCall = this.getCall(2);
-          this.lastCall = this.getCall(this.callCount - 1);
-        }
-
-        var vars = 'a,b,c,d,e,f,g,h,i,j,k,l';
-        function createProxy(func) {
-          // Retain the function length:
-          var p;
-          if (func.length) {
-            eval(
-              'p = (function proxy(' +
-                vars.substring(0, func.length * 2 - 1) +
-                ') { return p.invoke(func, this, slice.call(arguments)); });'
-            );
-          } else {
-            p = function proxy() {
-              return p.invoke(func, this, slice.call(arguments));
-            };
-          }
-          return p;
-        }
-
-        var uuid = 0;
-
-        // Public API
-        var spyApi = {
-          reset: function () {
-            this.called = false;
-            this.notCalled = true;
-            this.calledOnce = false;
-            this.calledTwice = false;
-            this.calledThrice = false;
-            this.callCount = 0;
-            this.firstCall = null;
-            this.secondCall = null;
-            this.thirdCall = null;
-            this.lastCall = null;
-            this.args = [];
-            this.returnValues = [];
-            this.thisValues = [];
-            this.exceptions = [];
-            this.callIds = [];
-            if (this.fakes) {
-              for (var i = 0; i < this.fakes.length; i++) {
-                this.fakes[i].reset();
-              }
-            }
-          },
-
-          create: function create(func) {
-            var name;
-
-            if (typeof func != 'function') {
-              func = function () {};
-            } else {
-              name = sinon.functionName(func);
-            }
-
-            var proxy = createProxy(func);
-
-            sinon.extend(proxy, spy);
-            delete proxy.create;
-            sinon.extend(proxy, func);
-
-            proxy.reset();
-            proxy.prototype = func.prototype;
-            proxy.displayName = name || 'spy';
-            proxy.toString = sinon.functionToString;
-            proxy._create = sinon.spy.create;
-            proxy.id = 'spy#' + uuid++;
-
-            return proxy;
-          },
-
-          invoke: function invoke(func, thisValue, args) {
-            var matching = matchingFake(this.fakes, args);
-            var exception, returnValue;
-
-            incrementCallCount.call(this);
-            push.call(this.thisValues, thisValue);
-            push.call(this.args, args);
-            push.call(this.callIds, callId++);
-
-            try {
-              if (matching) {
-                returnValue = matching.invoke(func, thisValue, args);
-              } else {
-                returnValue = (this.func || func).apply(thisValue, args);
-              }
-            } catch (e) {
-              push.call(this.returnValues, undefined);
-              exception = e;
-              throw e;
-            } finally {
-              push.call(this.exceptions, exception);
-            }
-
-            push.call(this.returnValues, returnValue);
-
-            createCallProperties.call(this);
-
-            return returnValue;
-          },
-
-          getCall: function getCall(i) {
-            if (i < 0 || i >= this.callCount) {
-              return null;
-            }
-
-            return spyCall.create(
-              this,
-              this.thisValues[i],
-              this.args[i],
-              this.returnValues[i],
-              this.exceptions[i],
-              this.callIds[i]
-            );
-          },
-
-          calledBefore: function calledBefore(spyFn) {
-            if (!this.called) {
-              return false;
-            }
-
-            if (!spyFn.called) {
-              return true;
-            }
-
-            return this.callIds[0] < spyFn.callIds[spyFn.callIds.length - 1];
-          },
-
-          calledAfter: function calledAfter(spyFn) {
-            if (!this.called || !spyFn.called) {
-              return false;
-            }
-
-            return (
-              this.callIds[this.callCount - 1] >
-              spyFn.callIds[spyFn.callCount - 1]
-            );
-          },
-
-          withArgs: function () {
-            var args = slice.call(arguments);
-
-            if (this.fakes) {
-              var match = matchingFake(this.fakes, args, true);
-
-              if (match) {
-                return match;
-              }
-            } else {
-              this.fakes = [];
-            }
-
-            var original = this;
-            var fake = this._create();
-            fake.matchingAguments = args;
-            push.call(this.fakes, fake);
-
-            fake.withArgs = function () {
-              return original.withArgs.apply(original, arguments);
-            };
-
-            for (var i = 0; i < this.args.length; i++) {
-              if (fake.matches(this.args[i])) {
-                incrementCallCount.call(fake);
-                push.call(fake.thisValues, this.thisValues[i]);
-                push.call(fake.args, this.args[i]);
-                push.call(fake.returnValues, this.returnValues[i]);
-                push.call(fake.exceptions, this.exceptions[i]);
-                push.call(fake.callIds, this.callIds[i]);
-              }
-            }
-            createCallProperties.call(fake);
-
-            return fake;
-          },
-
-          matches: function (args, strict) {
-            var margs = this.matchingAguments;
-
-            if (
-              margs.length <= args.length &&
-              sinon.deepEqual(margs, args.slice(0, margs.length))
-            ) {
-              return !strict || margs.length == args.length;
-            }
-          },
-
-          printf: function (format) {
-            var spy = this;
-            var args = slice.call(arguments, 1);
-            var formatter;
-
-            return (format || '').replace(/%(.)/g, function (match, specifyer) {
-              formatter = spyApi.formatters[specifyer];
-
-              if (typeof formatter == 'function') {
-                return formatter.call(null, spy, args);
-              } else if (!isNaN(parseInt(specifyer), 10)) {
-                return sinon.format(args[specifyer - 1]);
-              }
-
-              return '%' + specifyer;
-            });
-          },
-        };
-
-        delegateToCalls(spyApi, 'calledOn', true);
-        delegateToCalls(spyApi, 'alwaysCalledOn', false, 'calledOn');
-        delegateToCalls(spyApi, 'calledWith', true);
-        delegateToCalls(spyApi, 'calledWithMatch', true);
-        delegateToCalls(spyApi, 'alwaysCalledWith', false, 'calledWith');
-        delegateToCalls(
-          spyApi,
-          'alwaysCalledWithMatch',
-          false,
-          'calledWithMatch'
-        );
-        delegateToCalls(spyApi, 'calledWithExactly', true);
-        delegateToCalls(
-          spyApi,
-          'alwaysCalledWithExactly',
-          false,
-          'calledWithExactly'
-        );
-        delegateToCalls(
-          spyApi,
-          'neverCalledWith',
-          false,
-          'notCalledWith',
-          function () {
-            return true;
-          }
-        );
-        delegateToCalls(
-          spyApi,
-          'neverCalledWithMatch',
-          false,
-          'notCalledWithMatch',
-          function () {
-            return true;
-          }
-        );
-        delegateToCalls(spyApi, 'threw', true);
-        delegateToCalls(spyApi, 'alwaysThrew', false, 'threw');
-        delegateToCalls(spyApi, 'returned', true);
-        delegateToCalls(spyApi, 'alwaysReturned', false, 'returned');
-        delegateToCalls(spyApi, 'calledWithNew', true);
-        delegateToCalls(spyApi, 'alwaysCalledWithNew', false, 'calledWithNew');
-        delegateToCalls(spyApi, 'callArg', false, 'callArgWith', function () {
-          throw new Error(
-            this.toString() + ' cannot call arg since it was not yet invoked.'
-          );
-        });
-        spyApi.callArgWith = spyApi.callArg;
-        delegateToCalls(spyApi, 'yield', false, 'yield', function () {
-          throw new Error(
-            this.toString() + ' cannot yield since it was not yet invoked.'
-          );
-        });
-        // "invokeCallback" is an alias for "yield" since "yield" is invalid in strict mode.
-        spyApi.invokeCallback = spyApi.yield;
-        delegateToCalls(
-          spyApi,
-          'yieldTo',
-          false,
-          'yieldTo',
-          function (property) {
-            throw new Error(
-              this.toString() +
-                " cannot yield to '" +
-                property +
-                "' since it was not yet invoked."
-            );
-          }
-        );
-
-        spyApi.formatters = {
-          c: function (spy) {
-            return sinon.timesInWords(spy.callCount);
-          },
-
-          n: function (spy) {
-            return spy.toString();
-          },
-
-          C: function (spy) {
-            var calls = [];
-
-            for (var i = 0, l = spy.callCount; i < l; ++i) {
-              push.call(calls, '    ' + spy.getCall(i).toString());
-            }
-
-            return calls.length > 0 ? '\n' + calls.join('\n') : '';
-          },
-
-          t: function (spy) {
-            var objects = [];
-
-            for (var i = 0, l = spy.callCount; i < l; ++i) {
-              push.call(objects, sinon.format(spy.thisValues[i]));
-            }
-
-            return objects.join(', ');
-          },
-
-          '*': function (spy, args) {
-            var formatted = [];
-
-            for (var i = 0, l = args.length; i < l; ++i) {
-              push.call(formatted, sinon.format(args[i]));
-            }
-
-            return formatted.join(', ');
-          },
-        };
-
-        return spyApi;
-      })()
-    );
-
-    spyCall = (function () {
-      function throwYieldError(proxy, text, args) {
-        var msg = sinon.functionName(proxy) + text;
-        if (args.length) {
-          msg += ' Received [' + slice.call(args).join(', ') + ']';
-        }
-        throw new Error(msg);
-      }
-
-      var callApi = {
-        create: function create(
-          spy,
-          thisValue,
-          args,
-          returnValue,
-          exception,
-          id
-        ) {
-          var proxyCall = sinon.create(spyCall);
-          delete proxyCall.create;
-          proxyCall.proxy = spy;
-          proxyCall.thisValue = thisValue;
-          proxyCall.args = args;
-          proxyCall.returnValue = returnValue;
-          proxyCall.exception = exception;
-          proxyCall.callId = (typeof id == 'number' && id) || callId++;
-
-          return proxyCall;
-        },
-
-        calledOn: function calledOn(thisValue) {
-          if (sinon.match && sinon.match.isMatcher(thisValue)) {
-            return thisValue.test(this.thisValue);
-          }
-          return this.thisValue === thisValue;
-        },
-
-        calledWith: function calledWith() {
-          for (var i = 0, l = arguments.length; i < l; i += 1) {
-            if (!sinon.deepEqual(arguments[i], this.args[i])) {
-              return false;
-            }
-          }
-
-          return true;
-        },
-
-        calledWithMatch: function calledWithMatch() {
-          for (var i = 0, l = arguments.length; i < l; i += 1) {
-            var actual = this.args[i];
-            var expectation = arguments[i];
-            if (!sinon.match || !sinon.match(expectation).test(actual)) {
-              return false;
-            }
-          }
-          return true;
-        },
-
-        calledWithExactly: function calledWithExactly() {
-          return (
-            arguments.length == this.args.length &&
-            this.calledWith.apply(this, arguments)
-          );
-        },
-
-        notCalledWith: function notCalledWith() {
-          return !this.calledWith.apply(this, arguments);
-        },
-
-        notCalledWithMatch: function notCalledWithMatch() {
-          return !this.calledWithMatch.apply(this, arguments);
-        },
-
-        returned: function returned(value) {
-          return sinon.deepEqual(value, this.returnValue);
-        },
-
-        threw: function threw(error) {
-          if (typeof error == 'undefined' || !this.exception) {
-            return !!this.exception;
-          }
-
-          if (typeof error == 'string') {
-            return this.exception.name == error;
-          }
-
-          return this.exception === error;
-        },
-
-        calledWithNew: function calledWithNew(thisValue) {
-          return this.thisValue instanceof this.proxy;
-        },
-
-        calledBefore: function (other) {
-          return this.callId < other.callId;
-        },
-
-        calledAfter: function (other) {
-          return this.callId > other.callId;
-        },
-
-        callArg: function (pos) {
-          this.args[pos]();
-        },
-
-        callArgWith: function (pos) {
-          var args = slice.call(arguments, 1);
-          this.args[pos].apply(null, args);
-        },
-
-        yield: function () {
-          var args = this.args;
-          for (var i = 0, l = args.length; i < l; ++i) {
-            if (typeof args[i] === 'function') {
-              args[i].apply(null, slice.call(arguments));
-              return;
-            }
-          }
-          throwYieldError(
-            this.proxy,
-            ' cannot yield since no callback was passed.',
-            args
-          );
-        },
-
-        yieldTo: function (prop) {
-          var args = this.args;
-          for (var i = 0, l = args.length; i < l; ++i) {
-            if (args[i] && typeof args[i][prop] === 'function') {
-              args[i][prop].apply(null, slice.call(arguments, 1));
-              return;
-            }
-          }
-          throwYieldError(
-            this.proxy,
-            " cannot yield to '" + prop + "' since no callback was passed.",
-            args
-          );
-        },
-
-        toString: function () {
-          var callStr = this.proxy.toString() + '(';
-          var args = [];
-
-          for (var i = 0, l = this.args.length; i < l; ++i) {
-            push.call(args, sinon.format(this.args[i]));
-          }
-
-          callStr = callStr + args.join(', ') + ')';
-
-          if (typeof this.returnValue != 'undefined') {
-            callStr += ' => ' + sinon.format(this.returnValue);
-          }
-
-          if (this.exception) {
-            callStr += ' !' + this.exception.name;
-
-            if (this.exception.message) {
-              callStr += '(' + this.exception.message + ')';
-            }
-          }
-
-          return callStr;
-        },
-      };
-      callApi.invokeCallback = callApi.yield;
-      return callApi;
-    })();
-
-    spy.spyCall = spyCall;
-
-    // This steps outside the module sandbox and will be removed
-    sinon.spyCall = spyCall;
-
-    if (commonJSModule) {
-      module.exports = spy;
-    } else {
-      sinon.spy = spy;
-    }
-  })((typeof sinon == 'object' && sinon) || null);
-
-  /**
-   * @depend ../sinon.js
-   * @depend spy.js
-   */
-  /*jslint eqeqeq: false, onevar: false*/
-  /*global module, require, sinon*/
-  /**
-   * Stub functions
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  (function (sinon) {
-    var commonJSModule =
-      typeof module == 'object' && typeof require == 'function';
-
-    if (!sinon && commonJSModule) {
-      sinon = require('../sinon');
-    }
-
-    if (!sinon) {
-      return;
-    }
-
-    function stub(object, property, func) {
-      if (!!func && typeof func != 'function') {
-        throw new TypeError('Custom stub should be function');
-      }
-
-      var wrapper;
-
-      if (func) {
-        wrapper = sinon.spy && sinon.spy.create ? sinon.spy.create(func) : func;
-      } else {
-        wrapper = stub.create();
-      }
-
-      if (!object && !property) {
-        return sinon.stub.create();
-      }
-
-      if (!property && !!object && typeof object == 'object') {
-        for (var prop in object) {
-          if (typeof object[prop] === 'function') {
-            stub(object, prop);
-          }
-        }
-
-        return object;
-      }
-
-      return sinon.wrapMethod(object, property, wrapper);
-    }
-
-    function getChangingValue(stub, property) {
-      var index = stub.callCount - 1;
-      var prop =
-        index in stub[property]
-          ? stub[property][index]
-          : stub[property + 'Last'];
-      stub[property + 'Last'] = prop;
-
-      return prop;
-    }
-
-    function getCallback(stub, args) {
-      var callArgAt = getChangingValue(stub, 'callArgAts');
-
-      if (callArgAt < 0) {
-        var callArgProp = getChangingValue(stub, 'callArgProps');
-
-        for (var i = 0, l = args.length; i < l; ++i) {
-          if (!callArgProp && typeof args[i] == 'function') {
-            return args[i];
-          }
-
-          if (
-            callArgProp &&
-            args[i] &&
-            typeof args[i][callArgProp] == 'function'
-          ) {
-            return args[i][callArgProp];
-          }
-        }
-
-        return null;
-      }
-
-      return args[callArgAt];
-    }
-
-    var join = Array.prototype.join;
-
-    function getCallbackError(stub, func, args) {
-      if (stub.callArgAtsLast < 0) {
-        var msg;
-
-        if (stub.callArgPropsLast) {
-          msg =
-            sinon.functionName(stub) +
-            " expected to yield to '" +
-            stub.callArgPropsLast +
-            "', but no object with such a property was passed.";
-        } else {
-          msg =
-            sinon.functionName(stub) +
-            ' expected to yield, but no callback was passed.';
-        }
-
-        if (args.length > 0) {
-          msg += ' Received [' + join.call(args, ', ') + ']';
-        }
-
-        return msg;
-      }
-
-      return (
-        'argument at index ' +
-        stub.callArgAtsLast +
-        ' is not a function: ' +
-        func
-      );
-    }
-
-    var nextTick = (function () {
-      if (
-        typeof process === 'object' &&
-        typeof process.nextTick === 'function'
-      ) {
-        return process.nextTick;
-      } else if (typeof msSetImmediate === 'function') {
-        return msSetImmediate.bind(window);
-      } else if (typeof setImmediate === 'function') {
-        return setImmediate;
-      } else {
-        return function (callback) {
-          setTimeout(callback, 0);
-        };
-      }
-    })();
-
-    function callCallback(stub, args) {
-      if (stub.callArgAts.length > 0) {
-        var func = getCallback(stub, args);
-
-        if (typeof func != 'function') {
-          throw new TypeError(getCallbackError(stub, func, args));
-        }
-
-        var index = stub.callCount - 1;
-
-        var callbackArguments = getChangingValue(stub, 'callbackArguments');
-        var callbackContext = getChangingValue(stub, 'callbackContexts');
-
-        if (stub.callbackAsync) {
-          nextTick(function () {
-            func.apply(callbackContext, callbackArguments);
-          });
-        } else {
-          func.apply(callbackContext, callbackArguments);
-        }
-      }
-    }
-
-    var uuid = 0;
-
-    sinon.extend(
-      stub,
-      (function () {
-        var slice = Array.prototype.slice,
-          proto;
-
-        function throwsException(error, message) {
-          if (typeof error == 'string') {
-            this.exception = new Error(message || '');
-            this.exception.name = error;
-          } else if (!error) {
-            this.exception = new Error('Error');
-          } else {
-            this.exception = error;
-          }
-
-          return this;
-        }
-
-        proto = {
-          create: function create() {
-            var functionStub = function () {
-              callCallback(functionStub, arguments);
-
-              if (functionStub.exception) {
-                throw functionStub.exception;
-              } else if (typeof functionStub.returnArgAt == 'number') {
-                return arguments[functionStub.returnArgAt];
-              } else if (functionStub.returnThis) {
-                return this;
-              }
-              return functionStub.returnValue;
-            };
-
-            functionStub.id = 'stub#' + uuid++;
-            var orig = functionStub;
-            functionStub = sinon.spy.create(functionStub);
-            functionStub.func = orig;
-
-            functionStub.callArgAts = [];
-            functionStub.callbackArguments = [];
-            functionStub.callbackContexts = [];
-            functionStub.callArgProps = [];
-
-            sinon.extend(functionStub, stub);
-            functionStub._create = sinon.stub.create;
-            functionStub.displayName = 'stub';
-            functionStub.toString = sinon.functionToString;
-
-            return functionStub;
-          },
-
-          returns: function returns(value) {
-            this.returnValue = value;
-
-            return this;
-          },
-
-          returnsArg: function returnsArg(pos) {
-            if (typeof pos != 'number') {
-              throw new TypeError('argument index is not number');
-            }
-
-            this.returnArgAt = pos;
-
-            return this;
-          },
-
-          returnsThis: function returnsThis() {
-            this.returnThis = true;
-
-            return this;
-          },
-
-          throws: throwsException,
-          throwsException: throwsException,
-
-          callsArg: function callsArg(pos) {
-            if (typeof pos != 'number') {
-              throw new TypeError('argument index is not number');
-            }
-
-            this.callArgAts.push(pos);
-            this.callbackArguments.push([]);
-            this.callbackContexts.push(undefined);
-            this.callArgProps.push(undefined);
-
-            return this;
-          },
-
-          callsArgOn: function callsArgOn(pos, context) {
-            if (typeof pos != 'number') {
-              throw new TypeError('argument index is not number');
-            }
-            if (typeof context != 'object') {
-              throw new TypeError('argument context is not an object');
-            }
-
-            this.callArgAts.push(pos);
-            this.callbackArguments.push([]);
-            this.callbackContexts.push(context);
-            this.callArgProps.push(undefined);
-
-            return this;
-          },
-
-          callsArgWith: function callsArgWith(pos) {
-            if (typeof pos != 'number') {
-              throw new TypeError('argument index is not number');
-            }
-
-            this.callArgAts.push(pos);
-            this.callbackArguments.push(slice.call(arguments, 1));
-            this.callbackContexts.push(undefined);
-            this.callArgProps.push(undefined);
-
-            return this;
-          },
-
-          callsArgOnWith: function callsArgWith(pos, context) {
-            if (typeof pos != 'number') {
-              throw new TypeError('argument index is not number');
-            }
-            if (typeof context != 'object') {
-              throw new TypeError('argument context is not an object');
-            }
-
-            this.callArgAts.push(pos);
-            this.callbackArguments.push(slice.call(arguments, 2));
-            this.callbackContexts.push(context);
-            this.callArgProps.push(undefined);
-
-            return this;
-          },
-
-          yields: function () {
-            this.callArgAts.push(-1);
-            this.callbackArguments.push(slice.call(arguments, 0));
-            this.callbackContexts.push(undefined);
-            this.callArgProps.push(undefined);
-
-            return this;
-          },
-
-          yieldsOn: function (context) {
-            if (typeof context != 'object') {
-              throw new TypeError('argument context is not an object');
-            }
-
-            this.callArgAts.push(-1);
-            this.callbackArguments.push(slice.call(arguments, 1));
-            this.callbackContexts.push(context);
-            this.callArgProps.push(undefined);
-
-            return this;
-          },
-
-          yieldsTo: function (prop) {
-            this.callArgAts.push(-1);
-            this.callbackArguments.push(slice.call(arguments, 1));
-            this.callbackContexts.push(undefined);
-            this.callArgProps.push(prop);
-
-            return this;
-          },
-
-          yieldsToOn: function (prop, context) {
-            if (typeof context != 'object') {
-              throw new TypeError('argument context is not an object');
-            }
-
-            this.callArgAts.push(-1);
-            this.callbackArguments.push(slice.call(arguments, 2));
-            this.callbackContexts.push(context);
-            this.callArgProps.push(prop);
-
-            return this;
-          },
-        };
-
-        // create asynchronous versions of callsArg* and yields* methods
-        for (var method in proto) {
-          // need to avoid creating anotherasync versions of the newly added async methods
-          if (
-            proto.hasOwnProperty(method) &&
-            method.match(/^(callsArg|yields|thenYields$)/) &&
-            !method.match(/Async/)
-          ) {
-            proto[method + 'Async'] = (function (syncFnName) {
-              return function () {
-                this.callbackAsync = true;
-                return this[syncFnName].apply(this, arguments);
-              };
-            })(method);
-          }
-        }
-
-        return proto;
-      })()
-    );
-
-    if (commonJSModule) {
-      module.exports = stub;
-    } else {
-      sinon.stub = stub;
-    }
-  })((typeof sinon == 'object' && sinon) || null);
-
-  /**
-   * @depend ../sinon.js
-   * @depend stub.js
-   */
-  /*jslint eqeqeq: false, onevar: false, nomen: false*/
-  /*global module, require, sinon*/
-  /**
-   * Mock functions.
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  (function (sinon) {
-    var commonJSModule =
-      typeof module == 'object' && typeof require == 'function';
-    var push = [].push;
-
-    if (!sinon && commonJSModule) {
-      sinon = require('../sinon');
-    }
-
-    if (!sinon) {
-      return;
-    }
-
-    function mock(object) {
-      if (!object) {
-        return sinon.expectation.create('Anonymous mock');
-      }
-
-      return mock.create(object);
-    }
-
-    sinon.mock = mock;
-
-    sinon.extend(
-      mock,
-      (function () {
-        function each(collection, callback) {
-          if (!collection) {
-            return;
-          }
-
-          for (var i = 0, l = collection.length; i < l; i += 1) {
-            callback(collection[i]);
-          }
-        }
-
-        return {
-          create: function create(object) {
-            if (!object) {
-              throw new TypeError('object is null');
-            }
-
-            var mockObject = sinon.extend({}, mock);
-            mockObject.object = object;
-            delete mockObject.create;
-
-            return mockObject;
-          },
-
-          expects: function expects(method) {
-            if (!method) {
-              throw new TypeError('method is falsy');
-            }
-
-            if (!this.expectations) {
-              this.expectations = {};
-              this.proxies = [];
-            }
-
-            if (!this.expectations[method]) {
-              this.expectations[method] = [];
-              var mockObject = this;
-
-              sinon.wrapMethod(this.object, method, function () {
-                return mockObject.invokeMethod(method, this, arguments);
-              });
-
-              push.call(this.proxies, method);
-            }
-
-            var expectation = sinon.expectation.create(method);
-            push.call(this.expectations[method], expectation);
-
-            return expectation;
-          },
-
-          restore: function restore() {
-            var object = this.object;
-
-            each(this.proxies, function (proxy) {
-              if (typeof object[proxy].restore == 'function') {
-                object[proxy].restore();
-              }
-            });
-          },
-
-          verify: function verify() {
-            var expectations = this.expectations || {};
-            var messages = [],
-              met = [];
-
-            each(this.proxies, function (proxy) {
-              each(expectations[proxy], function (expectation) {
-                if (!expectation.met()) {
-                  push.call(messages, expectation.toString());
-                } else {
-                  push.call(met, expectation.toString());
-                }
-              });
-            });
-
-            this.restore();
-
-            if (messages.length > 0) {
-              sinon.expectation.fail(messages.concat(met).join('\n'));
-            } else {
-              sinon.expectation.pass(messages.concat(met).join('\n'));
-            }
-
-            return true;
-          },
-
-          invokeMethod: function invokeMethod(method, thisValue, args) {
-            var expectations = this.expectations && this.expectations[method];
-            var length = (expectations && expectations.length) || 0,
-              i;
-
-            for (i = 0; i < length; i += 1) {
-              if (
-                !expectations[i].met() &&
-                expectations[i].allowsCall(thisValue, args)
-              ) {
-                return expectations[i].apply(thisValue, args);
-              }
-            }
-
-            var messages = [],
-              available,
-              exhausted = 0;
-
-            for (i = 0; i < length; i += 1) {
-              if (expectations[i].allowsCall(thisValue, args)) {
-                available = available || expectations[i];
-              } else {
-                exhausted += 1;
-              }
-              push.call(messages, '    ' + expectations[i].toString());
-            }
-
-            if (exhausted === 0) {
-              return available.apply(thisValue, args);
-            }
-
-            messages.unshift(
-              'Unexpected call: ' +
-                sinon.spyCall.toString.call({
-                  proxy: method,
-                  args: args,
-                })
-            );
-
-            sinon.expectation.fail(messages.join('\n'));
-          },
-        };
-      })()
-    );
-
-    var times = sinon.timesInWords;
-
-    sinon.expectation = (function () {
-      var slice = Array.prototype.slice;
-      var _invoke = sinon.spy.invoke;
-
-      function callCountInWords(callCount) {
-        if (callCount == 0) {
-          return 'never called';
-        } else {
-          return 'called ' + times(callCount);
-        }
-      }
-
-      function expectedCallCountInWords(expectation) {
-        var min = expectation.minCalls;
-        var max = expectation.maxCalls;
-
-        if (typeof min == 'number' && typeof max == 'number') {
-          var str = times(min);
-
-          if (min != max) {
-            str = 'at least ' + str + ' and at most ' + times(max);
-          }
-
-          return str;
-        }
-
-        if (typeof min == 'number') {
-          return 'at least ' + times(min);
-        }
-
-        return 'at most ' + times(max);
-      }
-
-      function receivedMinCalls(expectation) {
-        var hasMinLimit = typeof expectation.minCalls == 'number';
-        return !hasMinLimit || expectation.callCount >= expectation.minCalls;
-      }
-
-      function receivedMaxCalls(expectation) {
-        if (typeof expectation.maxCalls != 'number') {
-          return false;
-        }
-
-        return expectation.callCount == expectation.maxCalls;
-      }
-
-      return {
-        minCalls: 1,
-        maxCalls: 1,
-
-        create: function create(methodName) {
-          var expectation = sinon.extend(
-            sinon.stub.create(),
-            sinon.expectation
-          );
-          delete expectation.create;
-          expectation.method = methodName;
-
-          return expectation;
-        },
-
-        invoke: function invoke(func, thisValue, args) {
-          this.verifyCallAllowed(thisValue, args);
-
-          return _invoke.apply(this, arguments);
-        },
-
-        atLeast: function atLeast(num) {
-          if (typeof num != 'number') {
-            throw new TypeError("'" + num + "' is not number");
-          }
-
-          if (!this.limitsSet) {
-            this.maxCalls = null;
-            this.limitsSet = true;
-          }
-
-          this.minCalls = num;
-
-          return this;
-        },
-
-        atMost: function atMost(num) {
-          if (typeof num != 'number') {
-            throw new TypeError("'" + num + "' is not number");
-          }
-
-          if (!this.limitsSet) {
-            this.minCalls = null;
-            this.limitsSet = true;
-          }
-
-          this.maxCalls = num;
-
-          return this;
-        },
-
-        never: function never() {
-          return this.exactly(0);
-        },
-
-        once: function once() {
-          return this.exactly(1);
-        },
-
-        twice: function twice() {
-          return this.exactly(2);
-        },
-
-        thrice: function thrice() {
-          return this.exactly(3);
-        },
-
-        exactly: function exactly(num) {
-          if (typeof num != 'number') {
-            throw new TypeError("'" + num + "' is not a number");
-          }
-
-          this.atLeast(num);
-          return this.atMost(num);
-        },
-
-        met: function met() {
-          return !this.failed && receivedMinCalls(this);
-        },
-
-        verifyCallAllowed: function verifyCallAllowed(thisValue, args) {
-          if (receivedMaxCalls(this)) {
-            this.failed = true;
-            sinon.expectation.fail(
-              this.method + ' already called ' + times(this.maxCalls)
-            );
-          }
-
-          if ('expectedThis' in this && this.expectedThis !== thisValue) {
-            sinon.expectation.fail(
-              this.method +
-                ' called with ' +
-                thisValue +
-                ' as thisValue, expected ' +
-                this.expectedThis
-            );
-          }
-
-          if (!('expectedArguments' in this)) {
-            return;
-          }
-
-          if (!args) {
-            sinon.expectation.fail(
-              this.method +
-                ' received no arguments, expected ' +
-                sinon.format(this.expectedArguments)
-            );
-          }
-
-          if (args.length < this.expectedArguments.length) {
-            sinon.expectation.fail(
-              this.method +
-                ' received too few arguments (' +
-                sinon.format(args) +
-                '), expected ' +
-                sinon.format(this.expectedArguments)
-            );
-          }
-
-          if (
-            this.expectsExactArgCount &&
-            args.length != this.expectedArguments.length
-          ) {
-            sinon.expectation.fail(
-              this.method +
-                ' received too many arguments (' +
-                sinon.format(args) +
-                '), expected ' +
-                sinon.format(this.expectedArguments)
-            );
-          }
-
-          for (var i = 0, l = this.expectedArguments.length; i < l; i += 1) {
-            if (!sinon.deepEqual(this.expectedArguments[i], args[i])) {
-              sinon.expectation.fail(
-                this.method +
-                  ' received wrong arguments ' +
-                  sinon.format(args) +
-                  ', expected ' +
-                  sinon.format(this.expectedArguments)
-              );
-            }
-          }
-        },
-
-        allowsCall: function allowsCall(thisValue, args) {
-          if (this.met() && receivedMaxCalls(this)) {
-            return false;
-          }
-
-          if ('expectedThis' in this && this.expectedThis !== thisValue) {
-            return false;
-          }
-
-          if (!('expectedArguments' in this)) {
-            return true;
-          }
-
-          args = args || [];
-
-          if (args.length < this.expectedArguments.length) {
-            return false;
-          }
-
-          if (
-            this.expectsExactArgCount &&
-            args.length != this.expectedArguments.length
-          ) {
-            return false;
-          }
-
-          for (var i = 0, l = this.expectedArguments.length; i < l; i += 1) {
-            if (!sinon.deepEqual(this.expectedArguments[i], args[i])) {
-              return false;
-            }
-          }
-
-          return true;
-        },
-
-        withArgs: function withArgs() {
-          this.expectedArguments = slice.call(arguments);
-          return this;
-        },
-
-        withExactArgs: function withExactArgs() {
-          this.withArgs.apply(this, arguments);
-          this.expectsExactArgCount = true;
-          return this;
-        },
-
-        on: function on(thisValue) {
-          this.expectedThis = thisValue;
-          return this;
-        },
-
-        toString: function () {
-          var args = (this.expectedArguments || []).slice();
-
-          if (!this.expectsExactArgCount) {
-            push.call(args, '[...]');
-          }
-
-          var callStr = sinon.spyCall.toString.call({
-            proxy: this.method,
-            args: args,
-          });
-
-          var message =
-            callStr.replace(', [...', '[, ...') +
-            ' ' +
-            expectedCallCountInWords(this);
-
-          if (this.met()) {
-            return 'Expectation met: ' + message;
-          }
-
-          return (
-            'Expected ' +
-            message +
-            ' (' +
-            callCountInWords(this.callCount) +
-            ')'
-          );
-        },
-
-        verify: function verify() {
-          if (!this.met()) {
-            sinon.expectation.fail(this.toString());
-          } else {
-            sinon.expectation.pass(this.toString());
-          }
-
-          return true;
-        },
-
-        pass: function (message) {
-          sinon.assert.pass(message);
-        },
-        fail: function (message) {
-          var exception = new Error(message);
-          exception.name = 'ExpectationError';
-
-          throw exception;
-        },
-      };
-    })();
-
-    if (commonJSModule) {
-      module.exports = mock;
-    } else {
-      sinon.mock = mock;
-    }
-  })((typeof sinon == 'object' && sinon) || null);
-
-  /**
-   * @depend ../sinon.js
-   * @depend stub.js
-   * @depend mock.js
-   */
-  /*jslint eqeqeq: false, onevar: false, forin: true*/
-  /*global module, require, sinon*/
-  /**
-   * Collections of stubs, spies and mocks.
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  (function (sinon) {
-    var commonJSModule =
-      typeof module == 'object' && typeof require == 'function';
-    var push = [].push;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-
-    if (!sinon && commonJSModule) {
-      sinon = require('../sinon');
-    }
-
-    if (!sinon) {
-      return;
-    }
-
-    function getFakes(fakeCollection) {
-      if (!fakeCollection.fakes) {
-        fakeCollection.fakes = [];
-      }
-
-      return fakeCollection.fakes;
-    }
-
-    function each(fakeCollection, method) {
-      var fakes = getFakes(fakeCollection);
-
-      for (var i = 0, l = fakes.length; i < l; i += 1) {
-        if (typeof fakes[i][method] == 'function') {
-          fakes[i][method]();
-        }
-      }
-    }
-
-    function compact(fakeCollection) {
-      var fakes = getFakes(fakeCollection);
-      var i = 0;
-      while (i < fakes.length) {
-        fakes.splice(i, 1);
-      }
-    }
-
-    var collection = {
-      verify: function resolve() {
-        each(this, 'verify');
-      },
-
-      restore: function restore() {
-        each(this, 'restore');
-        compact(this);
-      },
-
-      verifyAndRestore: function verifyAndRestore() {
-        var exception;
-
-        try {
-          this.verify();
-        } catch (e) {
-          exception = e;
-        }
-
-        this.restore();
-
-        if (exception) {
-          throw exception;
-        }
-      },
-
-      add: function add(fake) {
-        push.call(getFakes(this), fake);
-        return fake;
-      },
-
-      spy: function spy() {
-        return this.add(sinon.spy.apply(sinon, arguments));
-      },
-
-      stub: function stub(object, property, value) {
-        if (property) {
-          var original = object[property];
-
-          if (typeof original != 'function') {
-            if (!hasOwnProperty.call(object, property)) {
-              throw new TypeError(
-                'Cannot stub non-existent own property ' + property
-              );
-            }
-
-            object[property] = value;
-
-            return this.add({
-              restore: function () {
-                object[property] = original;
-              },
-            });
-          }
-        }
-        if (!property && !!object && typeof object == 'object') {
-          var stubbedObj = sinon.stub.apply(sinon, arguments);
-
-          for (var prop in stubbedObj) {
-            if (typeof stubbedObj[prop] === 'function') {
-              this.add(stubbedObj[prop]);
-            }
-          }
-
-          return stubbedObj;
-        }
-
-        return this.add(sinon.stub.apply(sinon, arguments));
-      },
-
-      mock: function mock() {
-        return this.add(sinon.mock.apply(sinon, arguments));
-      },
-
-      inject: function inject(obj) {
-        var col = this;
-
-        obj.spy = function () {
-          return col.spy.apply(col, arguments);
-        };
-
-        obj.stub = function () {
-          return col.stub.apply(col, arguments);
-        };
-
-        obj.mock = function () {
-          return col.mock.apply(col, arguments);
-        };
-
-        return obj;
-      },
-    };
-
-    if (commonJSModule) {
-      module.exports = collection;
-    } else {
-      sinon.collection = collection;
-    }
-  })((typeof sinon == 'object' && sinon) || null);
-
-  /*jslint eqeqeq: false, plusplus: false, evil: true, onevar: false, browser: true, forin: false*/
-  /*global module, require, window*/
-  /**
-   * Fake timer API
-   * setTimeout
-   * setInterval
-   * clearTimeout
-   * clearInterval
-   * tick
-   * reset
-   * Date
-   *
-   * Inspired by jsUnitMockTimeOut from JsUnit
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  if (typeof sinon == 'undefined') {
-    var sinon = {};
-  }
-
-  (function (global) {
-    var id = 1;
-
-    function addTimer(args, recurring) {
-      if (args.length === 0) {
-        throw new Error('Function requires at least 1 parameter');
-      }
-
-      var toId = id++;
-      var delay = args[1] || 0;
-
-      if (!this.timeouts) {
-        this.timeouts = {};
-      }
-
-      this.timeouts[toId] = {
-        id: toId,
-        func: args[0],
-        callAt: this.now + delay,
-        invokeArgs: Array.prototype.slice.call(args, 2),
-      };
-
-      if (recurring === true) {
-        this.timeouts[toId].interval = delay;
-      }
-
-      return toId;
-    }
-
-    function parseTime(str) {
-      if (!str) {
-        return 0;
-      }
-
-      var strings = str.split(':');
-      var l = strings.length,
-        i = l;
-      var ms = 0,
-        parsed;
-
-      if (l > 3 || !/^(\d\d:){0,2}\d\d?$/.test(str)) {
-        throw new Error("tick only understands numbers and 'h:m:s'");
-      }
-
-      while (i--) {
-        parsed = parseInt(strings[i], 10);
-
-        if (parsed >= 60) {
-          throw new Error('Invalid time ' + str);
-        }
-
-        ms += parsed * Math.pow(60, l - i - 1);
-      }
-
-      return ms * 1000;
-    }
-
-    function createObject(object) {
-      var newObject;
-
-      if (Object.create) {
-        newObject = Object.create(object);
-      } else {
-        var F = function () {};
-        F.prototype = object;
-        newObject = new F();
-      }
-
-      newObject.Date.clock = newObject;
-      return newObject;
-    }
-
-    sinon.clock = {
-      now: 0,
-
-      create: function create(now) {
-        var clock = createObject(this);
-
-        if (typeof now == 'number') {
-          clock.now = now;
-        }
-
-        if (!!now && typeof now == 'object') {
-          throw new TypeError('now should be milliseconds since UNIX epoch');
-        }
-
-        return clock;
-      },
-
-      setTimeout: function setTimeout(callback, timeout) {
-        return addTimer.call(this, arguments, false);
-      },
-
-      clearTimeout: function clearTimeout(timerId) {
-        if (!this.timeouts) {
-          this.timeouts = [];
-        }
-
-        if (timerId in this.timeouts) {
-          delete this.timeouts[timerId];
-        }
-      },
-
-      setInterval: function setInterval(callback, timeout) {
-        return addTimer.call(this, arguments, true);
-      },
-
-      clearInterval: function clearInterval(timerId) {
-        this.clearTimeout(timerId);
-      },
-
-      tick: function tick(ms) {
-        ms = typeof ms == 'number' ? ms : parseTime(ms);
-        var tickFrom = this.now,
-          tickTo = this.now + ms,
-          previous = this.now;
-        var timer = this.firstTimerInRange(tickFrom, tickTo);
-
-        var firstException;
-        while (timer && tickFrom <= tickTo) {
-          if (this.timeouts[timer.id]) {
-            tickFrom = this.now = timer.callAt;
-            try {
-              this.callTimer(timer);
-            } catch (e) {
-              firstException = firstException || e;
-            }
-          }
-
-          timer = this.firstTimerInRange(previous, tickTo);
-          previous = tickFrom;
-        }
-
-        this.now = tickTo;
-
-        if (firstException) {
-          throw firstException;
-        }
-      },
-
-      firstTimerInRange: function (from, to) {
-        var timer, smallest, originalTimer;
-
-        for (var id in this.timeouts) {
-          if (this.timeouts.hasOwnProperty(id)) {
-            if (
-              this.timeouts[id].callAt < from ||
-              this.timeouts[id].callAt > to
-            ) {
-              continue;
-            }
-
-            if (!smallest || this.timeouts[id].callAt < smallest) {
-              originalTimer = this.timeouts[id];
-              smallest = this.timeouts[id].callAt;
-
-              timer = {
-                func: this.timeouts[id].func,
-                callAt: this.timeouts[id].callAt,
-                interval: this.timeouts[id].interval,
-                id: this.timeouts[id].id,
-                invokeArgs: this.timeouts[id].invokeArgs,
-              };
-            }
-          }
-        }
-
-        return timer || null;
-      },
-
-      callTimer: function (timer) {
-        if (typeof timer.interval == 'number') {
-          this.timeouts[timer.id].callAt += timer.interval;
-        } else {
-          delete this.timeouts[timer.id];
-        }
-
-        try {
-          if (typeof timer.func == 'function') {
-            timer.func.apply(null, timer.invokeArgs);
-          } else {
-            eval(timer.func);
-          }
-        } catch (e) {
-          var exception = e;
-        }
-
-        if (!this.timeouts[timer.id]) {
-          if (exception) {
-            throw exception;
-          }
-          return;
-        }
-
-        if (exception) {
-          throw exception;
-        }
-      },
-
-      reset: function reset() {
-        this.timeouts = {};
-      },
-
-      Date: (function () {
-        var NativeDate = Date;
-
-        function ClockDate(year, month, date, hour, minute, second, ms) {
-          // Defensive and verbose to avoid potential harm in passing
-          // explicit undefined when user does not pass argument
-          switch (arguments.length) {
-            case 0:
-              return new NativeDate(ClockDate.clock.now);
-            case 1:
-              return new NativeDate(year);
-            case 2:
-              return new NativeDate(year, month);
-            case 3:
-              return new NativeDate(year, month, date);
-            case 4:
-              return new NativeDate(year, month, date, hour);
-            case 5:
-              return new NativeDate(year, month, date, hour, minute);
-            case 6:
-              return new NativeDate(year, month, date, hour, minute, second);
-            default:
-              return new NativeDate(
-                year,
-                month,
-                date,
-                hour,
-                minute,
-                second,
-                ms
-              );
-          }
-        }
-
-        return mirrorDateProperties(ClockDate, NativeDate);
-      })(),
-    };
-
-    function mirrorDateProperties(target, source) {
-      if (source.now) {
-        target.now = function now() {
-          return target.clock.now;
-        };
-      } else {
-        delete target.now;
-      }
-
-      if (source.toSource) {
-        target.toSource = function toSource() {
-          return source.toSource();
-        };
-      } else {
-        delete target.toSource;
-      }
-
-      target.toString = function toString() {
-        return source.toString();
-      };
-
-      target.prototype = source.prototype;
-      target.parse = source.parse;
-      target.UTC = source.UTC;
-      target.prototype.toUTCString = source.prototype.toUTCString;
-      return target;
-    }
-
-    var methods = [
-      'Date',
-      'setTimeout',
-      'setInterval',
-      'clearTimeout',
-      'clearInterval',
-    ];
-
-    function restore() {
-      var method;
-
-      for (var i = 0, l = this.methods.length; i < l; i++) {
-        method = this.methods[i];
-        if (global[method].hadOwnProperty) {
-          global[method] = this['_' + method];
-        } else {
-          delete global[method];
-        }
-      }
-
-      // Prevent multiple executions which will completely remove these props
-      this.methods = [];
-    }
-
-    function stubGlobal(method, clock) {
-      clock[method].hadOwnProperty = Object.prototype.hasOwnProperty.call(
-        global,
-        method
-      );
-      clock['_' + method] = global[method];
-
-      if (method == 'Date') {
-        var date = mirrorDateProperties(clock[method], global[method]);
-        global[method] = date;
-      } else {
-        global[method] = function () {
-          return clock[method].apply(clock, arguments);
-        };
-
-        for (var prop in clock[method]) {
-          if (clock[method].hasOwnProperty(prop)) {
-            global[method][prop] = clock[method][prop];
-          }
-        }
-      }
-
-      global[method].clock = clock;
-    }
-
-    sinon.useFakeTimers = function useFakeTimers(now) {
-      var clock = sinon.clock.create(now);
-      clock.restore = restore;
-      clock.methods = Array.prototype.slice.call(
-        arguments,
-        typeof now == 'number' ? 1 : 0
-      );
-
-      if (clock.methods.length === 0) {
-        clock.methods = methods;
-      }
-
-      for (var i = 0, l = clock.methods.length; i < l; i++) {
-        stubGlobal(clock.methods[i], clock);
-      }
-
-      return clock;
-    };
-  })(
-    typeof global != 'undefined' && typeof global !== 'function' ? global : this
-  );
-
-  sinon.timers = {
-    setTimeout: setTimeout,
-    clearTimeout: clearTimeout,
-    setInterval: setInterval,
-    clearInterval: clearInterval,
-    Date: Date,
-  };
-
-  if (typeof module == 'object' && typeof require == 'function') {
-    module.exports = sinon;
-  }
-
-  /*jslint eqeqeq: false, onevar: false*/
-  /*global sinon, module, require, ActiveXObject, XMLHttpRequest, DOMParser*/
-  /**
-   * Minimal Event interface implementation
-   *
-   * Original implementation by Sven Fuchs: https://gist.github.com/995028
-   * Modifications and tests by Christian Johansen.
-   *
-   * @author Sven Fuchs ([email protected])
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2011 Sven Fuchs, Christian Johansen
-   */
-
-  if (typeof sinon == 'undefined') {
-    this.sinon = {};
-  }
-
-  (function () {
-    var push = [].push;
-
-    sinon.Event = function Event(type, bubbles, cancelable) {
-      this.initEvent(type, bubbles, cancelable);
-    };
-
-    sinon.Event.prototype = {
-      initEvent: function (type, bubbles, cancelable) {
-        this.type = type;
-        this.bubbles = bubbles;
-        this.cancelable = cancelable;
-      },
-
-      stopPropagation: function () {},
-
-      preventDefault: function () {
-        this.defaultPrevented = true;
-      },
-    };
-
-    sinon.EventTarget = {
-      addEventListener: function addEventListener(event, listener, useCapture) {
-        this.eventListeners = this.eventListeners || {};
-        this.eventListeners[event] = this.eventListeners[event] || [];
-        push.call(this.eventListeners[event], listener);
-      },
-
-      removeEventListener: function removeEventListener(
-        event,
-        listener,
-        useCapture
-      ) {
-        var listeners =
-          (this.eventListeners && this.eventListeners[event]) || [];
-
-        for (var i = 0, l = listeners.length; i < l; ++i) {
-          if (listeners[i] == listener) {
-            return listeners.splice(i, 1);
-          }
-        }
-      },
-
-      dispatchEvent: function dispatchEvent(event) {
-        var type = event.type;
-        var listeners =
-          (this.eventListeners && this.eventListeners[type]) || [];
-
-        for (var i = 0; i < listeners.length; i++) {
-          if (typeof listeners[i] == 'function') {
-            listeners[i].call(this, event);
-          } else {
-            listeners[i].handleEvent(event);
-          }
-        }
-
-        return !!event.defaultPrevented;
-      },
-    };
-  })();
-
-  /**
-   * @depend ../../sinon.js
-   * @depend event.js
-   */
-  /*jslint eqeqeq: false, onevar: false*/
-  /*global sinon, module, require, ActiveXObject, XMLHttpRequest, DOMParser*/
-  /**
-   * Fake XMLHttpRequest object
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  if (typeof sinon == 'undefined') {
-    this.sinon = {};
-  }
-  sinon.xhr = { XMLHttpRequest: this.XMLHttpRequest };
-
-  // wrapper for global
-  (function (global) {
-    var xhr = sinon.xhr;
-    xhr.GlobalXMLHttpRequest = global.XMLHttpRequest;
-    xhr.GlobalActiveXObject = global.ActiveXObject;
-    xhr.supportsActiveX = typeof xhr.GlobalActiveXObject != 'undefined';
-    xhr.supportsXHR = typeof xhr.GlobalXMLHttpRequest != 'undefined';
-    xhr.workingXHR = xhr.supportsXHR
-      ? xhr.GlobalXMLHttpRequest
-      : xhr.supportsActiveX
-      ? function () {
-          return new xhr.GlobalActiveXObject('MSXML2.XMLHTTP.3.0');
-        }
-      : false;
-
-    /*jsl:ignore*/
-    var unsafeHeaders = {
-      'Accept-Charset': true,
-      'Accept-Encoding': true,
-      Connection: true,
-      'Content-Length': true,
-      Cookie: true,
-      Cookie2: true,
-      'Content-Transfer-Encoding': true,
-      Date: true,
-      Expect: true,
-      Host: true,
-      'Keep-Alive': true,
-      Referer: true,
-      TE: true,
-      Trailer: true,
-      'Transfer-Encoding': true,
-      Upgrade: true,
-      'User-Agent': true,
-      Via: true,
-    };
-    /*jsl:end*/
-
-    function FakeXMLHttpRequest() {
-      this.readyState = FakeXMLHttpRequest.UNSENT;
-      this.requestHeaders = {};
-      this.requestBody = null;
-      this.status = 0;
-      this.statusText = '';
-
-      if (typeof FakeXMLHttpRequest.onCreate == 'function') {
-        FakeXMLHttpRequest.onCreate(this);
-      }
-    }
-
-    function verifyState(xhr) {
-      if (xhr.readyState !== FakeXMLHttpRequest.OPENED) {
-        throw new Error('INVALID_STATE_ERR');
-      }
-
-      if (xhr.sendFlag) {
-        throw new Error('INVALID_STATE_ERR');
-      }
-    }
-
-    // filtering to enable a white-list version of Sinon FakeXhr,
-    // where whitelisted requests are passed through to real XHR
-    function each(collection, callback) {
-      if (!collection) return;
-      for (var i = 0, l = collection.length; i < l; i += 1) {
-        callback(collection[i]);
-      }
-    }
-    function some(collection, callback) {
-      for (var index = 0; index < collection.length; index++) {
-        if (callback(collection[index]) === true) return true;
-      }
-      return false;
-    }
-    // largest arity in XHR is 5 - XHR#open
-    var apply = function (obj, method, args) {
-      switch (args.length) {
-        case 0:
-          return obj[method]();
-        case 1:
-          return obj[method](args[0]);
-        case 2:
-          return obj[method](args[0], args[1]);
-        case 3:
-          return obj[method](args[0], args[1], args[2]);
-        case 4:
-          return obj[method](args[0], args[1], args[2], args[3]);
-        case 5:
-          return obj[method](args[0], args[1], args[2], args[3], args[4]);
-      }
-    };
-
-    FakeXMLHttpRequest.filters = [];
-    FakeXMLHttpRequest.addFilter = function (fn) {
-      this.filters.push(fn);
-    };
-    var IE6Re = /MSIE 6/;
-    FakeXMLHttpRequest.defake = function (fakeXhr, xhrArgs) {
-      var xhr = new sinon.xhr.workingXHR();
-      each(
-        [
-          'open',
-          'setRequestHeader',
-          'send',
-          'abort',
-          'getResponseHeader',
-          'getAllResponseHeaders',
-          'addEventListener',
-          'overrideMimeType',
-          'removeEventListener',
-        ],
-        function (method) {
-          fakeXhr[method] = function () {
-            return apply(xhr, method, arguments);
-          };
-        }
-      );
-
-      var copyAttrs = function (args) {
-        each(args, function (attr) {
-          try {
-            fakeXhr[attr] = xhr[attr];
-          } catch (e) {
-            if (!IE6Re.test(navigator.userAgent)) throw e;
-          }
-        });
-      };
-
-      var stateChange = function () {
-        fakeXhr.readyState = xhr.readyState;
-        if (xhr.readyState >= FakeXMLHttpRequest.HEADERS_RECEIVED) {
-          copyAttrs(['status', 'statusText']);
-        }
-        if (xhr.readyState >= FakeXMLHttpRequest.LOADING) {
-          copyAttrs(['responseText']);
-        }
-        if (xhr.readyState === FakeXMLHttpRequest.DONE) {
-          copyAttrs(['responseXML']);
-        }
-        if (fakeXhr.onreadystatechange)
-          fakeXhr.onreadystatechange.call(fakeXhr);
-      };
-      if (xhr.addEventListener) {
-        for (var event in fakeXhr.eventListeners) {
-          if (fakeXhr.eventListeners.hasOwnProperty(event)) {
-            each(fakeXhr.eventListeners[event], function (handler) {
-              xhr.addEventListener(event, handler);
-            });
-          }
-        }
-        xhr.addEventListener('readystatechange', stateChange);
-      } else {
-        xhr.onreadystatechange = stateChange;
-      }
-      apply(xhr, 'open', xhrArgs);
-    };
-    FakeXMLHttpRequest.useFilters = false;
-
-    function verifyRequestSent(xhr) {
-      if (xhr.readyState == FakeXMLHttpRequest.DONE) {
-        throw new Error('Request done');
-      }
-    }
-
-    function verifyHeadersReceived(xhr) {
-      if (xhr.async && xhr.readyState != FakeXMLHttpRequest.HEADERS_RECEIVED) {
-        throw new Error('No headers received');
-      }
-    }
-
-    function verifyResponseBodyType(body) {
-      if (typeof body != 'string') {
-        var error = new Error(
-          'Attempted to respond to fake XMLHttpRequest with ' +
-            body +
-            ', which is not a string.'
-        );
-        error.name = 'InvalidBodyException';
-        throw error;
-      }
-    }
-
-    sinon.extend(FakeXMLHttpRequest.prototype, sinon.EventTarget, {
-      async: true,
-
-      open: function open(method, url, async, username, password) {
-        this.method = method;
-        this.url = url;
-        this.async = typeof async == 'boolean' ? async : true;
-        this.username = username;
-        this.password = password;
-        this.responseText = null;
-        this.responseXML = null;
-        this.requestHeaders = {};
-        this.sendFlag = false;
-        if (sinon.FakeXMLHttpRequest.useFilters === true) {
-          var xhrArgs = arguments;
-          var defake = some(FakeXMLHttpRequest.filters, function (filter) {
-            return filter.apply(this, xhrArgs);
-          });
-          if (defake) {
-            return sinon.FakeXMLHttpRequest.defake(this, arguments);
-          }
-        }
-        this.readyStateChange(FakeXMLHttpRequest.OPENED);
-      },
-
-      readyStateChange: function readyStateChange(state) {
-        this.readyState = state;
-
-        if (typeof this.onreadystatechange == 'function') {
-          try {
-            this.onreadystatechange();
-          } catch (e) {
-            sinon.logError('Fake XHR onreadystatechange handler', e);
-          }
-        }
-
-        this.dispatchEvent(new sinon.Event('readystatechange'));
-      },
-
-      setRequestHeader: function setRequestHeader(header, value) {
-        verifyState(this);
-
-        if (unsafeHeaders[header] || /^(Sec-|Proxy-)/.test(header)) {
-          throw new Error('Refused to set unsafe header "' + header + '"');
-        }
-
-        if (this.requestHeaders[header]) {
-          this.requestHeaders[header] += ',' + value;
-        } else {
-          this.requestHeaders[header] = value;
-        }
-      },
-
-      // Helps testing
-      setResponseHeaders: function setResponseHeaders(headers) {
-        this.responseHeaders = {};
-
-        for (var header in headers) {
-          if (headers.hasOwnProperty(header)) {
-            this.responseHeaders[header] = headers[header];
-          }
-        }
-
-        if (this.async) {
-          this.readyStateChange(FakeXMLHttpRequest.HEADERS_RECEIVED);
-        }
-      },
-
-      // Currently treats ALL data as a DOMString (i.e. no Document)
-      send: function send(data) {
-        verifyState(this);
-
-        if (!/^(get|head)$/i.test(this.method)) {
-          if (this.requestHeaders['Content-Type']) {
-            var value = this.requestHeaders['Content-Type'].split(';');
-            this.requestHeaders['Content-Type'] = value[0] + ';charset=utf-8';
-          } else {
-            this.requestHeaders['Content-Type'] = 'text/plain;charset=utf-8';
-          }
-
-          this.requestBody = data;
-        }
-
-        this.errorFlag = false;
-        this.sendFlag = this.async;
-        this.readyStateChange(FakeXMLHttpRequest.OPENED);
-
-        if (typeof this.onSend == 'function') {
-          this.onSend(this);
-        }
-      },
-
-      abort: function abort() {
-        this.aborted = true;
-        this.responseText = null;
-        this.errorFlag = true;
-        this.requestHeaders = {};
-
-        if (
-          this.readyState > sinon.FakeXMLHttpRequest.UNSENT &&
-          this.sendFlag
-        ) {
-          this.readyStateChange(sinon.FakeXMLHttpRequest.DONE);
-          this.sendFlag = false;
-        }
-
-        this.readyState = sinon.FakeXMLHttpRequest.UNSENT;
-      },
-
-      getResponseHeader: function getResponseHeader(header) {
-        if (this.readyState < FakeXMLHttpRequest.HEADERS_RECEIVED) {
-          return null;
-        }
-
-        if (/^Set-Cookie2?$/i.test(header)) {
-          return null;
-        }
-
-        header = header.toLowerCase();
-
-        for (var h in this.responseHeaders) {
-          if (h.toLowerCase() == header) {
-            return this.responseHeaders[h];
-          }
-        }
-
-        return null;
-      },
-
-      getAllResponseHeaders: function getAllResponseHeaders() {
-        if (this.readyState < FakeXMLHttpRequest.HEADERS_RECEIVED) {
-          return '';
-        }
-
-        var headers = '';
-
-        for (var header in this.responseHeaders) {
-          if (
-            this.responseHeaders.hasOwnProperty(header) &&
-            !/^Set-Cookie2?$/i.test(header)
-          ) {
-            headers += header + ': ' + this.responseHeaders[header] + '\r\n';
-          }
-        }
-
-        return headers;
-      },
-
-      setResponseBody: function setResponseBody(body) {
-        verifyRequestSent(this);
-        verifyHeadersReceived(this);
-        verifyResponseBodyType(body);
-
-        var chunkSize = this.chunkSize || 10;
-        var index = 0;
-        this.responseText = '';
-
-        do {
-          if (this.async) {
-            this.readyStateChange(FakeXMLHttpRequest.LOADING);
-          }
-
-          this.responseText += body.substring(index, index + chunkSize);
-          index += chunkSize;
-        } while (index < body.length);
-
-        var type = this.getResponseHeader('Content-Type');
-
-        if (
-          this.responseText &&
-          (!type || /(text\/xml)|(application\/xml)|(\+xml)/.test(type))
-        ) {
-          try {
-            this.responseXML = FakeXMLHttpRequest.parseXML(this.responseText);
-          } catch (e) {
-            // Unable to parse XML - no biggie
-          }
-        }
-
-        if (this.async) {
-          this.readyStateChange(FakeXMLHttpRequest.DONE);
-        } else {
-          this.readyState = FakeXMLHttpRequest.DONE;
-        }
-      },
-
-      respond: function respond(status, headers, body) {
-        this.setResponseHeaders(headers || {});
-        this.status = typeof status == 'number' ? status : 200;
-        this.statusText = FakeXMLHttpRequest.statusCodes[this.status];
-        this.setResponseBody(body || '');
-      },
-    });
-
-    sinon.extend(FakeXMLHttpRequest, {
-      UNSENT: 0,
-      OPENED: 1,
-      HEADERS_RECEIVED: 2,
-      LOADING: 3,
-      DONE: 4,
-    });
-
-    // Borrowed from JSpec
-    FakeXMLHttpRequest.parseXML = function parseXML(text) {
-      var xmlDoc;
-
-      if (typeof DOMParser != 'undefined') {
-        var parser = new DOMParser();
-        xmlDoc = parser.parseFromString(text, 'text/xml');
-      } else {
-        xmlDoc = new ActiveXObject('Microsoft.XMLDOM');
-        xmlDoc.async = 'false';
-        xmlDoc.loadXML(text);
-      }
-
-      return xmlDoc;
-    };
-
-    FakeXMLHttpRequest.statusCodes = {
-      100: 'Continue',
-      101: 'Switching Protocols',
-      200: 'OK',
-      201: 'Created',
-      202: 'Accepted',
-      203: 'Non-Authoritative Information',
-      204: 'No Content',
-      205: 'Reset Content',
-      206: 'Partial Content',
-      300: 'Multiple Choice',
-      301: 'Moved Permanently',
-      302: 'Found',
-      303: 'See Other',
-      304: 'Not Modified',
-      305: 'Use Proxy',
-      307: 'Temporary Redirect',
-      400: 'Bad Request',
-      401: 'Unauthorized',
-      402: 'Payment Required',
-      403: 'Forbidden',
-      404: 'Not Found',
-      405: 'Method Not Allowed',
-      406: 'Not Acceptable',
-      407: 'Proxy Authentication Required',
-      408: 'Request Timeout',
-      409: 'Conflict',
-      410: 'Gone',
-      411: 'Length Required',
-      412: 'Precondition Failed',
-      413: 'Request Entity Too Large',
-      414: 'Request-URI Too Long',
-      415: 'Unsupported Media Type',
-      416: 'Requested Range Not Satisfiable',
-      417: 'Expectation Failed',
-      422: 'Unprocessable Entity',
-      500: 'Internal Server Error',
-      501: 'Not Implemented',
-      502: 'Bad Gateway',
-      503: 'Service Unavailable',
-      504: 'Gateway Timeout',
-      505: 'HTTP Version Not Supported',
-    };
-
-    sinon.useFakeXMLHttpRequest = function () {
-      sinon.FakeXMLHttpRequest.restore = function restore(keepOnCreate) {
-        if (xhr.supportsXHR) {
-          global.XMLHttpRequest = xhr.GlobalXMLHttpRequest;
-        }
-
-        if (xhr.supportsActiveX) {
-          global.ActiveXObject = xhr.GlobalActiveXObject;
-        }
-
-        delete sinon.FakeXMLHttpRequest.restore;
-
-        if (keepOnCreate !== true) {
-          delete sinon.FakeXMLHttpRequest.onCreate;
-        }
-      };
-      if (xhr.supportsXHR) {
-        global.XMLHttpRequest = sinon.FakeXMLHttpRequest;
-      }
-
-      if (xhr.supportsActiveX) {
-        global.ActiveXObject = function ActiveXObject(objId) {
-          if (objId == 'Microsoft.XMLHTTP' || /^Msxml2\.XMLHTTP/i.test(objId)) {
-            return new sinon.FakeXMLHttpRequest();
-          }
-
-          return new xhr.GlobalActiveXObject(objId);
-        };
-      }
-
-      return sinon.FakeXMLHttpRequest;
-    };
-
-    sinon.FakeXMLHttpRequest = FakeXMLHttpRequest;
-  })(this);
-
-  if (typeof module == 'object' && typeof require == 'function') {
-    module.exports = sinon;
-  }
-
-  /**
-   * @depend fake_xml_http_request.js
-   */
-  /*jslint eqeqeq: false, onevar: false, regexp: false, plusplus: false*/
-  /*global module, require, window*/
-  /**
-   * The Sinon "server" mimics a web server that receives requests from
-   * sinon.FakeXMLHttpRequest and provides an API to respond to those requests,
-   * both synchronously and asynchronously. To respond synchronuously, canned
-   * answers have to be provided upfront.
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  if (typeof sinon == 'undefined') {
-    var sinon = {};
-  }
-
-  sinon.fakeServer = (function () {
-    var push = [].push;
-    function F() {}
-
-    function create(proto) {
-      F.prototype = proto;
-      return new F();
-    }
-
-    function responseArray(handler) {
-      var response = handler;
-
-      if (Object.prototype.toString.call(handler) != '[object Array]') {
-        response = [200, {}, handler];
-      }
-
-      if (typeof response[2] != 'string') {
-        throw new TypeError(
-          'Fake server response body should be string, but was ' +
-            typeof response[2]
-        );
-      }
-
-      return response;
-    }
-
-    var wloc = typeof window !== 'undefined' ? window.location : {};
-    var rCurrLoc = new RegExp('^' + wloc.protocol + '//' + wloc.host);
-
-    function matchOne(response, reqMethod, reqUrl) {
-      var rmeth = response.method;
-      var matchMethod =
-        !rmeth || rmeth.toLowerCase() == reqMethod.toLowerCase();
-      var url = response.url;
-      var matchUrl =
-        !url ||
-        url == reqUrl ||
-        (typeof url.test == 'function' && url.test(reqUrl));
-
-      return matchMethod && matchUrl;
-    }
-
-    function match(response, request) {
-      var requestMethod = this.getHTTPMethod(request);
-      var requestUrl = request.url;
-
-      if (!/^https?:\/\//.test(requestUrl) || rCurrLoc.test(requestUrl)) {
-        requestUrl = requestUrl.replace(rCurrLoc, '');
-      }
-
-      if (matchOne(response, this.getHTTPMethod(request), requestUrl)) {
-        if (typeof response.response == 'function') {
-          var ru = response.url;
-          var args = [request].concat(!ru ? [] : requestUrl.match(ru).slice(1));
-          return response.response.apply(response, args);
-        }
-
-        return true;
-      }
-
-      return false;
-    }
-
-    return {
-      create: function () {
-        var server = create(this);
-        this.xhr = sinon.useFakeXMLHttpRequest();
-        server.requests = [];
-
-        this.xhr.onCreate = function (xhrObj) {
-          server.addRequest(xhrObj);
-        };
-
-        return server;
-      },
-
-      addRequest: function addRequest(xhrObj) {
-        var server = this;
-        push.call(this.requests, xhrObj);
-
-        xhrObj.onSend = function () {
-          server.handleRequest(this);
-        };
-
-        if (this.autoRespond && !this.responding) {
-          setTimeout(function () {
-            server.responding = false;
-            server.respond();
-          }, this.autoRespondAfter || 10);
-
-          this.responding = true;
-        }
-      },
-
-      getHTTPMethod: function getHTTPMethod(request) {
-        if (this.fakeHTTPMethods && /post/i.test(request.method)) {
-          var matches = (request.requestBody || '').match(/_method=([^\b;]+)/);
-          return !!matches ? matches[1] : request.method;
-        }
-
-        return request.method;
-      },
-
-      handleRequest: function handleRequest(xhr) {
-        if (xhr.async) {
-          if (!this.queue) {
-            this.queue = [];
-          }
-
-          push.call(this.queue, xhr);
-        } else {
-          this.processRequest(xhr);
-        }
-      },
-
-      respondWith: function respondWith(method, url, body) {
-        if (arguments.length == 1 && typeof method != 'function') {
-          this.response = responseArray(method);
-          return;
-        }
-
-        if (!this.responses) {
-          this.responses = [];
-        }
-
-        if (arguments.length == 1) {
-          body = method;
-          url = method = null;
-        }
-
-        if (arguments.length == 2) {
-          body = url;
-          url = method;
-          method = null;
-        }
-
-        push.call(this.responses, {
-          method: method,
-          url: url,
-          response: typeof body == 'function' ? body : responseArray(body),
-        });
-      },
-
-      respond: function respond() {
-        if (arguments.length > 0) this.respondWith.apply(this, arguments);
-        var queue = this.queue || [];
-        var request;
-
-        while ((request = queue.shift())) {
-          this.processRequest(request);
-        }
-      },
-
-      processRequest: function processRequest(request) {
-        try {
-          if (request.aborted) {
-            return;
-          }
-
-          var response = this.response || [404, {}, ''];
-
-          if (this.responses) {
-            for (var i = 0, l = this.responses.length; i < l; i++) {
-              if (match.call(this, this.responses[i], request)) {
-                response = this.responses[i].response;
-                break;
-              }
-            }
-          }
-
-          if (request.readyState != 4) {
-            request.respond(response[0], response[1], response[2]);
-          }
-        } catch (e) {
-          sinon.logError('Fake server request processing', e);
-        }
-      },
-
-      restore: function restore() {
-        return this.xhr.restore && this.xhr.restore.apply(this.xhr, arguments);
-      },
-    };
-  })();
-
-  if (typeof module == 'object' && typeof require == 'function') {
-    module.exports = sinon;
-  }
-
-  /**
-   * @depend fake_server.js
-   * @depend fake_timers.js
-   */
-  /*jslint browser: true, eqeqeq: false, onevar: false*/
-  /*global sinon*/
-  /**
-   * Add-on for sinon.fakeServer that automatically handles a fake timer along with
-   * the FakeXMLHttpRequest. The direct inspiration for this add-on is jQuery
-   * 1.3.x, which does not use xhr object's onreadystatehandler at all - instead,
-   * it polls the object for completion with setInterval. Dispite the direct
-   * motivation, there is nothing jQuery-specific in this file, so it can be used
-   * in any environment where the ajax implementation depends on setInterval or
-   * setTimeout.
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  (function () {
-    function Server() {}
-    Server.prototype = sinon.fakeServer;
-
-    sinon.fakeServerWithClock = new Server();
-
-    sinon.fakeServerWithClock.addRequest = function addRequest(xhr) {
-      if (xhr.async) {
-        if (typeof setTimeout.clock == 'object') {
-          this.clock = setTimeout.clock;
-        } else {
-          this.clock = sinon.useFakeTimers();
-          this.resetClock = true;
-        }
-
-        if (!this.longestTimeout) {
-          var clockSetTimeout = this.clock.setTimeout;
-          var clockSetInterval = this.clock.setInterval;
-          var server = this;
-
-          this.clock.setTimeout = function (fn, timeout) {
-            server.longestTimeout = Math.max(
-              timeout,
-              server.longestTimeout || 0
-            );
-
-            return clockSetTimeout.apply(this, arguments);
-          };
-
-          this.clock.setInterval = function (fn, timeout) {
-            server.longestTimeout = Math.max(
-              timeout,
-              server.longestTimeout || 0
-            );
-
-            return clockSetInterval.apply(this, arguments);
-          };
-        }
-      }
-
-      return sinon.fakeServer.addRequest.call(this, xhr);
-    };
-
-    sinon.fakeServerWithClock.respond = function respond() {
-      var returnVal = sinon.fakeServer.respond.apply(this, arguments);
-
-      if (this.clock) {
-        this.clock.tick(this.longestTimeout || 0);
-        this.longestTimeout = 0;
-
-        if (this.resetClock) {
-          this.clock.restore();
-          this.resetClock = false;
-        }
-      }
-
-      return returnVal;
-    };
-
-    sinon.fakeServerWithClock.restore = function restore() {
-      if (this.clock) {
-        this.clock.restore();
-      }
-
-      return sinon.fakeServer.restore.apply(this, arguments);
-    };
-  })();
-
-  /**
-   * @depend ../sinon.js
-   * @depend collection.js
-   * @depend util/fake_timers.js
-   * @depend util/fake_server_with_clock.js
-   */
-  /*jslint eqeqeq: false, onevar: false, plusplus: false*/
-  /*global require, module*/
-  /**
-   * Manages fake collections as well as fake utilities such as Sinon's
-   * timers and fake XHR implementation in one convenient object.
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  if (typeof module == 'object' && typeof require == 'function') {
-    var sinon = require('../sinon');
-    sinon.extend(sinon, require('./util/fake_timers'));
-  }
-
-  (function () {
-    var push = [].push;
-
-    function exposeValue(sandbox, config, key, value) {
-      if (!value) {
-        return;
-      }
-
-      if (config.injectInto) {
-        config.injectInto[key] = value;
-      } else {
-        push.call(sandbox.args, value);
-      }
-    }
-
-    function prepareSandboxFromConfig(config) {
-      var sandbox = sinon.create(sinon.sandbox);
-
-      if (config.useFakeServer) {
-        if (typeof config.useFakeServer == 'object') {
-          sandbox.serverPrototype = config.useFakeServer;
-        }
-
-        sandbox.useFakeServer();
-      }
-
-      if (config.useFakeTimers) {
-        if (typeof config.useFakeTimers == 'object') {
-          sandbox.useFakeTimers.apply(sandbox, config.useFakeTimers);
-        } else {
-          sandbox.useFakeTimers();
-        }
-      }
-
-      return sandbox;
-    }
-
-    sinon.sandbox = sinon.extend(sinon.create(sinon.collection), {
-      useFakeTimers: function useFakeTimers() {
-        this.clock = sinon.useFakeTimers.apply(sinon, arguments);
-
-        return this.add(this.clock);
-      },
-
-      serverPrototype: sinon.fakeServer,
-
-      useFakeServer: function useFakeServer() {
-        var proto = this.serverPrototype || sinon.fakeServer;
-
-        if (!proto || !proto.create) {
-          return null;
-        }
-
-        this.server = proto.create();
-        return this.add(this.server);
-      },
-
-      inject: function (obj) {
-        sinon.collection.inject.call(this, obj);
-
-        if (this.clock) {
-          obj.clock = this.clock;
-        }
-
-        if (this.server) {
-          obj.server = this.server;
-          obj.requests = this.server.requests;
-        }
-
-        return obj;
-      },
-
-      create: function (config) {
-        if (!config) {
-          return sinon.create(sinon.sandbox);
-        }
-
-        var sandbox = prepareSandboxFromConfig(config);
-        sandbox.args = sandbox.args || [];
-        var prop,
-          value,
-          exposed = sandbox.inject({});
-
-        if (config.properties) {
-          for (var i = 0, l = config.properties.length; i < l; i++) {
-            prop = config.properties[i];
-            value = exposed[prop] || (prop == 'sandbox' && sandbox);
-            exposeValue(sandbox, config, prop, value);
-          }
-        } else {
-          exposeValue(sandbox, config, 'sandbox', value);
-        }
-
-        return sandbox;
-      },
-    });
-
-    sinon.sandbox.useFakeXMLHttpRequest = sinon.sandbox.useFakeServer;
-
-    if (typeof module == 'object' && typeof require == 'function') {
-      module.exports = sinon.sandbox;
-    }
-  })();
-
-  /**
-   * @depend ../sinon.js
-   * @depend stub.js
-   * @depend mock.js
-   * @depend sandbox.js
-   */
-  /*jslint eqeqeq: false, onevar: false, forin: true, plusplus: false*/
-  /*global module, require, sinon*/
-  /**
-   * Test function, sandboxes fakes
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  (function (sinon) {
-    var commonJSModule =
-      typeof module == 'object' && typeof require == 'function';
-
-    if (!sinon && commonJSModule) {
-      sinon = require('../sinon');
-    }
-
-    if (!sinon) {
-      return;
-    }
-
-    function test(callback) {
-      var type = typeof callback;
-
-      if (type != 'function') {
-        throw new TypeError(
-          'sinon.test needs to wrap a test function, got ' + type
-        );
-      }
-
-      return function () {
-        var config = sinon.getConfig(sinon.config);
-        config.injectInto =
-          (config.injectIntoThis && this) || config.injectInto;
-        var sandbox = sinon.sandbox.create(config);
-        var exception, result;
-        var args = Array.prototype.slice.call(arguments).concat(sandbox.args);
-
-        try {
-          result = callback.apply(this, args);
-        } catch (e) {
-          exception = e;
-        }
-
-        if (typeof exception !== 'undefined') {
-          sandbox.restore();
-          throw exception;
-        } else {
-          sandbox.verifyAndRestore();
-        }
-
-        return result;
-      };
-    }
-
-    test.config = {
-      injectIntoThis: true,
-      injectInto: null,
-      properties: ['spy', 'stub', 'mock', 'clock', 'server', 'requests'],
-      useFakeTimers: true,
-      useFakeServer: true,
-    };
-
-    if (commonJSModule) {
-      module.exports = test;
-    } else {
-      sinon.test = test;
-    }
-  })((typeof sinon == 'object' && sinon) || null);
-
-  /**
-   * @depend ../sinon.js
-   * @depend test.js
-   */
-  /*jslint eqeqeq: false, onevar: false, eqeqeq: false*/
-  /*global module, require, sinon*/
-  /**
-   * Test case, sandboxes all test functions
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  (function (sinon) {
-    var commonJSModule =
-      typeof module == 'object' && typeof require == 'function';
-
-    if (!sinon && commonJSModule) {
-      sinon = require('../sinon');
-    }
-
-    if (!sinon || !Object.prototype.hasOwnProperty) {
-      return;
-    }
-
-    function createTest(property, setUp, tearDown) {
-      return function () {
-        if (setUp) {
-          setUp.apply(this, arguments);
-        }
-
-        var exception, result;
-
-        try {
-          result = property.apply(this, arguments);
-        } catch (e) {
-          exception = e;
-        }
-
-        if (tearDown) {
-          tearDown.apply(this, arguments);
-        }
-
-        if (exception) {
-          throw exception;
-        }
-
-        return result;
-      };
-    }
-
-    function testCase(tests, prefix) {
-      /*jsl:ignore*/
-      if (!tests || typeof tests != 'object') {
-        throw new TypeError(
-          'sinon.testCase needs an object with test functions'
-        );
-      }
-      /*jsl:end*/
-
-      prefix = prefix || 'test';
-      var rPrefix = new RegExp('^' + prefix);
-      var methods = {},
-        testName,
-        property,
-        method;
-      var setUp = tests.setUp;
-      var tearDown = tests.tearDown;
-
-      for (testName in tests) {
-        if (tests.hasOwnProperty(testName)) {
-          property = tests[testName];
-
-          if (/^(setUp|tearDown)$/.test(testName)) {
-            continue;
-          }
-
-          if (typeof property == 'function' && rPrefix.test(testName)) {
-            method = property;
-
-            if (setUp || tearDown) {
-              method = createTest(property, setUp, tearDown);
-            }
-
-            methods[testName] = sinon.test(method);
-          } else {
-            methods[testName] = tests[testName];
-          }
-        }
-      }
-
-      return methods;
-    }
-
-    if (commonJSModule) {
-      module.exports = testCase;
-    } else {
-      sinon.testCase = testCase;
-    }
-  })((typeof sinon == 'object' && sinon) || null);
-
-  /**
-   * @depend ../sinon.js
-   * @depend stub.js
-   */
-  /*jslint eqeqeq: false, onevar: false, nomen: false, plusplus: false*/
-  /*global module, require, sinon*/
-  /**
-   * Assertions matching the test spy retrieval interface.
-   *
-   * @author Christian Johansen ([email protected])
-   * @license BSD
-   *
-   * Copyright (c) 2010-2011 Christian Johansen
-   */
-
-  (function (sinon, global) {
-    var commonJSModule =
-      typeof module == 'object' && typeof require == 'function';
-    var slice = Array.prototype.slice;
-    var assert;
-
-    if (!sinon && commonJSModule) {
-      sinon = require('../sinon');
-    }
-
-    if (!sinon) {
-      return;
-    }
-
-    function verifyIsStub() {
-      var method;
-
-      for (var i = 0, l = arguments.length; i < l; ++i) {
-        method = arguments[i];
-
-        if (!method) {
-          assert.fail('fake is not a spy');
-        }
-
-        if (typeof method != 'function') {
-          assert.fail(method + ' is not a function');
-        }
-
-        if (typeof method.getCall != 'function') {
-          assert.fail(method + ' is not stubbed');
-        }
-      }
-    }
-
-    function failAssertion(object, msg) {
-      object = object || global;
-      var failMethod = object.fail || assert.fail;
-      failMethod.call(object, msg);
-    }
-
-    function mirrorPropAsAssertion(name, method, message) {
-      if (arguments.length == 2) {
-        message = method;
-        method = name;
-      }
-
-      assert[name] = function (fake) {
-        verifyIsStub(fake);
-
-        var args = slice.call(arguments, 1);
-        var failed = false;
-
-        if (typeof method == 'function') {
-          failed = !method(fake);
-        } else {
-          failed =
-            typeof fake[method] == 'function'
-              ? !fake[method].apply(fake, args)
-              : !fake[method];
-        }
-
-        if (failed) {
-          failAssertion(this, fake.printf.apply(fake, [message].concat(args)));
-        } else {
-          assert.pass(name);
-        }
-      };
-    }
-
-    function exposedName(prefix, prop) {
-      return !prefix || /^fail/.test(prop)
-        ? prop
-        : prefix + prop.slice(0, 1).toUpperCase() + prop.slice(1);
-    }
-
-    assert = {
-      failException: 'AssertError',
-
-      fail: function fail(message) {
-        var error = new Error(message);
-        error.name = this.failException || assert.failException;
-
-        throw error;
-      },
-
-      pass: function pass(assertion) {},
-
-      callOrder: function assertCallOrder() {
-        verifyIsStub.apply(null, arguments);
-        var expected = '',
-          actual = '';
-
-        if (!sinon.calledInOrder(arguments)) {
-          try {
-            expected = [].join.call(arguments, ', ');
-            actual = sinon.orderByFirstCall(slice.call(arguments)).join(', ');
-          } catch (e) {
-            // If this fails, we'll just fall back to the blank string
-          }
-
-          failAssertion(
-            this,
-            'expected ' +
-              expected +
-              ' to be ' +
-              'called in order but were called as ' +
-              actual
-          );
-        } else {
-          assert.pass('callOrder');
-        }
-      },
-
-      callCount: function assertCallCount(method, count) {
-        verifyIsStub(method);
-
-        if (method.callCount != count) {
-          var msg =
-            'expected %n to be called ' +
-            sinon.timesInWords(count) +
-            ' but was called %c%C';
-          failAssertion(this, method.printf(msg));
-        } else {
-          assert.pass('callCount');
-        }
-      },
-
-      expose: function expose(target, options) {
-        if (!target) {
-          throw new TypeError('target is null or undefined');
-        }
-
-        var o = options || {};
-        var prefix = (typeof o.prefix == 'undefined' && 'assert') || o.prefix;
-        var includeFail =
-          typeof o.includeFail == 'undefined' || !!o.includeFail;
-
-        for (var method in this) {
-          if (method != 'export' && (includeFail || !/^(fail)/.test(method))) {
-            target[exposedName(prefix, method)] = this[method];
-          }
-        }
-
-        return target;
-      },
-    };
-
-    mirrorPropAsAssertion(
-      'called',
-      'expected %n to have been called at least once but was never called'
-    );
-    mirrorPropAsAssertion(
-      'notCalled',
-      function (spy) {
-        return !spy.called;
-      },
-      'expected %n to not have been called but was called %c%C'
-    );
-    mirrorPropAsAssertion(
-      'calledOnce',
-      'expected %n to be called once but was called %c%C'
-    );
-    mirrorPropAsAssertion(
-      'calledTwice',
-      'expected %n to be called twice but was called %c%C'
-    );
-    mirrorPropAsAssertion(
-      'calledThrice',
-      'expected %n to be called thrice but was called %c%C'
-    );
-    mirrorPropAsAssertion(
-      'calledOn',
-      'expected %n to be called with %1 as this but was called with %t'
-    );
-    mirrorPropAsAssertion(
-      'alwaysCalledOn',
-      'expected %n to always be called with %1 as this but was called with %t'
-    );
-    mirrorPropAsAssertion('calledWithNew', 'expected %n to be called with new');
-    mirrorPropAsAssertion(
-      'alwaysCalledWithNew',
-      'expected %n to always be called with new'
-    );
-    mirrorPropAsAssertion(
-      'calledWith',
-      'expected %n to be called with arguments %*%C'
-    );
-    mirrorPropAsAssertion(
-      'calledWithMatch',
-      'expected %n to be called with match %*%C'
-    );
-    mirrorPropAsAssertion(
-      'alwaysCalledWith',
-      'expected %n to always be called with arguments %*%C'
-    );
-    mirrorPropAsAssertion(
-      'alwaysCalledWithMatch',
-      'expected %n to always be called with match %*%C'
-    );
-    mirrorPropAsAssertion(
-      'calledWithExactly',
-      'expected %n to be called with exact arguments %*%C'
-    );
-    mirrorPropAsAssertion(
-      'alwaysCalledWithExactly',
-      'expected %n to always be called with exact arguments %*%C'
-    );
-    mirrorPropAsAssertion(
-      'neverCalledWith',
-      'expected %n to never be called with arguments %*%C'
-    );
-    mirrorPropAsAssertion(
-      'neverCalledWithMatch',
-      'expected %n to never be called with match %*%C'
-    );
-    mirrorPropAsAssertion('threw', '%n did not throw exception%C');
-    mirrorPropAsAssertion('alwaysThrew', '%n did not always throw exception%C');
-
-    if (commonJSModule) {
-      module.exports = assert;
-    } else {
-      sinon.assert = assert;
-    }
-  })(
-    (typeof sinon == 'object' && sinon) || null,
-    typeof window != 'undefined' ? window : global
-  );
-
-  return sinon;
-}.call((typeof window != 'undefined' && window) || {});
diff --git a/test/support/walk_dir.js b/test/support/walk_dir.js
deleted file mode 100644
index f6a22dbb..00000000
--- a/test/support/walk_dir.js
+++ /dev/null
@@ -1,51 +0,0 @@
-var fs = require('fs');
-
-var methods = {
-  walk: function (dir, validation_function, cb) {
-    if (arguments.length === 2) {
-      cb = validation_function;
-      validation_function = null;
-    }
-
-    var results = [];
-    fs.readdir(dir, function (err, list) {
-      if (err) {
-        return cb(err);
-      }
-
-      var pending = list.length;
-
-      if (!pending) {
-        return cb(null, results);
-      }
-
-      list.forEach(function (file) {
-        file = dir + '/' + file;
-        fs.stat(file, function (err, stat) {
-          if (stat && stat.isDirectory()) {
-            methods.walk(file, validation_function, function (err, res) {
-              results = results.concat(res);
-              if (!--pending) {
-                cb(null, results);
-              }
-            });
-          } else {
-            if (typeof validation_function === 'function') {
-              if (validation_function(file)) {
-                results.push(file);
-              }
-            } else {
-              results.push(file);
-            }
-
-            if (!--pending) {
-              cb(null, results);
-            }
-          }
-        });
-      });
-    });
-  },
-};
-
-module.exports = methods;
diff --git a/test/system.spec.ts b/test/system.spec.ts
new file mode 100644
index 00000000..5263a62f
--- /dev/null
+++ b/test/system.spec.ts
@@ -0,0 +1,74 @@
+import { describe, expect, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+describe('system', () => {
+  describe('directoryPath()', () => {
+    it('returns unix fs directory full path', () => {
+      const spy_random_words = vi
+        .spyOn(faker.random, 'words')
+        .mockReturnValue('24/7');
+
+      const directoryPath = faker.system.directoryPath();
+
+      expect(
+        directoryPath.indexOf('/'),
+        'generated directoryPath should start with /'
+      ).toBe(0);
+
+      spy_random_words.mockRestore();
+    });
+  });
+
+  describe('filePath()', () => {
+    it('returns unix fs file full path', () => {
+      const spy_random_words = vi
+        .spyOn(faker.random, 'words')
+        .mockReturnValue('24/7');
+
+      const filePath = faker.system.filePath();
+
+      expect(
+        filePath.indexOf('/'),
+        'generated filePath should start with /'
+      ).toBe(0);
+
+      spy_random_words.mockRestore();
+    });
+  });
+
+  describe('fileName()', () => {
+    it('returns filenames without system path separators', () => {
+      const spy_random_words = vi
+        .spyOn(faker.random, 'words')
+        .mockReturnValue('24/7');
+
+      const fileName = faker.system.fileName();
+
+      expect(
+        fileName.indexOf('/'),
+        'generated fileNames should not have path separators'
+      ).toBe(-1);
+
+      spy_random_words.mockRestore();
+    });
+  });
+
+  describe('commonFileName()', () => {
+    it('returns filenames without system path separators', () => {
+      const spy_random_words = vi
+        .spyOn(faker.random, 'words')
+        .mockReturnValue('24/7');
+
+      const fileName =
+        // @ts-expect-error
+        faker.system.commonFileName();
+
+      expect(
+        fileName.indexOf('/'),
+        'generated commonFileNames should not have path separators'
+      ).toBe(-1);
+
+      spy_random_words.mockRestore();
+    });
+  });
+});
diff --git a/test/system.unit.js b/test/system.unit.js
deleted file mode 100644
index ee279750..00000000
--- a/test/system.unit.js
+++ /dev/null
@@ -1,63 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('system.js', function () {
-  describe('directoryPath()', function () {
-    it('returns unix fs directory full path', function () {
-      sinon.stub(faker.random, 'words').returns('24/7');
-      var directoryPath = faker.system.directoryPath();
-      assert.strictEqual(
-        directoryPath.indexOf('/'),
-        0,
-        'generated directoryPath should start with /'
-      );
-
-      faker.random.words.restore();
-    });
-  });
-
-  describe('filePath()', function () {
-    it('returns unix fs file full path', function () {
-      sinon.stub(faker.random, 'words').returns('24/7');
-      var filePath = faker.system.filePath();
-      assert.strictEqual(
-        filePath.indexOf('/'),
-        0,
-        'generated filePath should start with /'
-      );
-
-      faker.random.words.restore();
-    });
-  });
-
-  describe('fileName()', function () {
-    it('returns filenames without system path separators', function () {
-      sinon.stub(faker.random, 'words').returns('24/7');
-      var fileName = faker.system.fileName();
-      assert.strictEqual(
-        fileName.indexOf('/'),
-        -1,
-        'generated fileNames should not have path separators'
-      );
-
-      faker.random.words.restore();
-    });
-  });
-
-  describe('commonFileName()', function () {
-    it('returns filenames without system path separators', function () {
-      sinon.stub(faker.random, 'words').returns('24/7');
-      var fileName = faker.system.commonFileName();
-      assert.strictEqual(
-        fileName.indexOf('/'),
-        -1,
-        'generated commonFileNames should not have path separators'
-      );
-
-      faker.random.words.restore();
-    });
-  });
-});
diff --git a/test/time.spec.ts b/test/time.spec.ts
new file mode 100644
index 00000000..4ef28952
--- /dev/null
+++ b/test/time.spec.ts
@@ -0,0 +1,23 @@
+import { describe, expect, it } from 'vitest';
+import { faker } from '../lib';
+
+faker.seed(1234);
+
+describe('time', () => {
+  describe('recent()', () => {
+    it('returns the recent timestamp in Unix time format', () => {
+      const date = faker.time.recent();
+      expect(typeof date).toBe('number');
+    });
+
+    it('returns the recent timestamp in full time string format', () => {
+      const date = faker.time.recent('wide');
+      expect(typeof date).toBe('string');
+    });
+
+    it('returns the recent timestamp in abbreviated string format', () => {
+      const date = faker.time.recent('abbr');
+      expect(typeof date).toBe('string');
+    });
+  });
+});
diff --git a/test/time.unit.js b/test/time.unit.js
deleted file mode 100644
index 3c4a0650..00000000
--- a/test/time.unit.js
+++ /dev/null
@@ -1,29 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-faker.seed(1234);
-
-describe('time.js', function () {
-  describe('recent()', function () {
-    it('returns the recent timestamp in Unix time format', function () {
-      var date = faker.time.recent();
-      assert.ok(typeof date === 'number');
-      // assert.ok(date == new Date().getTime());
-    });
-
-    it('returns the recent timestamp in full time string format', function () {
-      var date = faker.time.recent('wide');
-      assert.ok(typeof date === 'string');
-      // assert.ok(date == new Date().toTimeString());
-    });
-
-    it('returns the recent timestamp in abbreviated string format', function () {
-      var date = faker.time.recent('abbr');
-      assert.ok(typeof date === 'string');
-      // assert.ok(date == new Date().toLocaleTimeString());
-    });
-  });
-});
diff --git a/test/unique.spec.ts b/test/unique.spec.ts
new file mode 100644
index 00000000..26b80bff
--- /dev/null
+++ b/test/unique.spec.ts
@@ -0,0 +1,61 @@
+import { describe, expect, it } from 'vitest';
+import { faker } from '../lib';
+
+describe('unique', () => {
+  describe('unique()', () => {
+    it('is able to call a function with no arguments and return a result', () => {
+      const result =
+        // @ts-expect-error
+        faker.unique(faker.internet.email);
+      expect(typeof result).toBe('string');
+    });
+
+    it('is able to call a function with arguments and return a result', () => {
+      const result = faker.unique(faker.internet.email, ['a', 'b', 'c']); // third argument is provider, or domain for email
+      expect(result).toMatch(/\@c/);
+    });
+
+    it('is able to call same function with arguments and return a result', () => {
+      const result = faker.unique(faker.internet.email, ['a', 'b', 'c']); // third argument is provider, or domain for email
+      expect(result).toMatch(/\@c/);
+    });
+
+    it('is able to exclude results as array', () => {
+      const result = faker.unique(faker.internet.protocol, [], {
+        exclude: ['https'],
+      });
+      expect(result).toBe('http');
+    });
+
+    it('is able to limit unique call by maxTime in ms', () => {
+      let result;
+      try {
+        result = faker.unique(faker.internet.protocol, [], {
+          maxTime: 1,
+          maxRetries: 9999,
+          exclude: ['https', 'http'],
+        });
+      } catch (err) {
+        expect(err.message.substr(0, 16)).toBe('Exceeded maxTime');
+      }
+    });
+
+    it('is able to limit unique call by maxRetries', () => {
+      let result;
+      try {
+        result = faker.unique(faker.internet.protocol, [], {
+          maxTime: 5000,
+          maxRetries: 5,
+          exclude: ['https', 'http'],
+        });
+      } catch (err) {
+        expect(err.message.substr(0, 19)).toBe('Exceeded maxRetries');
+      }
+    });
+
+    it('is able to call last function with arguments and return a result', () => {
+      const result = faker.unique(faker.internet.email, ['a', 'b', 'c']); // third argument is provider, or domain for email
+      expect(result).toMatch(/\@c/);
+    });
+  });
+});
diff --git a/test/unique.unit.js b/test/unique.unit.js
deleted file mode 100644
index d500243e..00000000
--- a/test/unique.unit.js
+++ /dev/null
@@ -1,62 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('unique.js', function () {
-  describe('unique()', function () {
-    it('is able to call a function with no arguments and return a result', function () {
-      var result = faker.unique(faker.internet.email);
-      assert.strictEqual(typeof result, 'string');
-    });
-
-    it('is able to call a function with arguments and return a result', function () {
-      var result = faker.unique(faker.internet.email, ['a', 'b', 'c']); // third argument is provider, or domain for email
-      assert.ok(result.match(/\@c/));
-    });
-
-    it('is able to call same function with arguments and return a result', function () {
-      var result = faker.unique(faker.internet.email, ['a', 'b', 'c']); // third argument is provider, or domain for email
-      assert.ok(result.match(/\@c/));
-    });
-
-    it('is able to exclude results as array', function () {
-      var result = faker.unique(faker.internet.protocol, [], {
-        exclude: ['https'],
-      });
-      assert.strictEqual(result, 'http');
-    });
-
-    it('is able to limit unique call by maxTime in ms', function () {
-      var result;
-      try {
-        result = faker.unique(faker.internet.protocol, [], {
-          maxTime: 1,
-          maxRetries: 9999,
-          exclude: ['https', 'http'],
-        });
-      } catch (err) {
-        assert.strictEqual(err.message.substr(0, 16), 'Exceeded maxTime');
-      }
-    });
-
-    it('is able to limit unique call by maxRetries', function () {
-      var result;
-      try {
-        result = faker.unique(faker.internet.protocol, [], {
-          maxTime: 5000,
-          maxRetries: 5,
-          exclude: ['https', 'http'],
-        });
-      } catch (err) {
-        assert.strictEqual(err.message.substr(0, 19), 'Exceeded maxRetries');
-      }
-    });
-
-    it('is able to call last function with arguments and return a result', function () {
-      var result = faker.unique(faker.internet.email, ['a', 'b', 'c']); // third argument is provider, or domain for email
-      assert.ok(result.match(/\@c/));
-    });
-  });
-});
diff --git a/test/vehicle.spec.ts b/test/vehicle.spec.ts
new file mode 100644
index 00000000..57606d92
--- /dev/null
+++ b/test/vehicle.spec.ts
@@ -0,0 +1,98 @@
+import { expect } from 'vitest';
+import { describe, it, vi } from 'vitest';
+import { faker } from '../lib';
+
+describe('vehicle', () => {
+  describe('vehicle()', () => {
+    it('returns a random vehicle', () => {
+      const spy_vehicle_vehicle = vi
+        .spyOn(faker.vehicle, 'vehicle')
+        .mockReturnValue('Ford Explorer');
+      const vehicle = faker.vehicle.vehicle();
+
+      expect(vehicle).toBe('Ford Explorer');
+      spy_vehicle_vehicle.mockRestore();
+    });
+  });
+
+  describe('manufacturer()', () => {
+    it('returns random manufacturer', () => {
+      const spy_vehicle_manufacturer = vi
+        .spyOn(faker.vehicle, 'manufacturer')
+        .mockReturnValue('Porsche');
+      const manufacturer = faker.vehicle.manufacturer();
+
+      expect(manufacturer).toBe('Porsche');
+      spy_vehicle_manufacturer.mockRestore();
+    });
+  });
+
+  describe('type()', () => {
+    it('returns random vehicle type', () => {
+      const spy_vehicle_type = vi
+        .spyOn(faker.vehicle, 'type')
+        .mockReturnValue('Minivan');
+      const type = faker.vehicle.type();
+
+      expect(type).toBe('Minivan');
+      spy_vehicle_type.mockRestore();
+    });
+  });
+
+  describe('fuel()', () => {
+    it('returns a fuel type', () => {
+      const spy_vehicle_fuel = vi
+        .spyOn(faker.vehicle, 'fuel')
+        .mockReturnValue('Hybrid');
+      const fuel = faker.vehicle.fuel();
+
+      expect(fuel).toBe('Hybrid');
+      spy_vehicle_fuel.mockRestore();
+    });
+  });
+
+  describe('vin()', () => {
+    it('returns valid vin number', () => {
+      const vin = faker.vehicle.vin();
+      expect(vin).match(
+        /^([A-HJ-NPR-Z0-9]{10}[A-HJ-NPR-Z0-9]{1}[A-HJ-NPR-Z0-9]{1}\d{5})$/
+      );
+    });
+  });
+
+  describe('color()', () => {
+    it('returns a random color', () => {
+      const spy_vehicle_color = vi
+        .spyOn(faker.vehicle, 'color')
+        .mockReturnValue('black');
+      const color = faker.vehicle.color();
+
+      expect(color).toBe('black');
+      spy_vehicle_color.mockRestore();
+    });
+  });
+
+  describe('vrm()', () => {
+    it('returns a random vrm', () => {
+      const spy_vehicle_vrm = vi
+        .spyOn(faker.vehicle, 'vrm')
+        .mockReturnValue('MF59EEW');
+      const vrm = faker.vehicle.vrm();
+
+      expect(vrm).toBe('MF59EEW');
+      spy_vehicle_vrm.mockRestore();
+    });
+  });
+
+  describe('bicycle()', () => {
+    it('returns a random type of bicycle', () => {
+      const spy_vehicle_bicycle = vi
+        .spyOn(faker.vehicle, 'bicycle')
+        .mockReturnValue('Adventure Road Bicycle');
+      const bicycle = faker.vehicle.bicycle();
+
+      expect(bicycle).toBe('Adventure Road Bicycle');
+      spy_vehicle_bicycle.mockRestore();
+    });
+  });
+});
diff --git a/test/vehicle.unit.js b/test/vehicle.unit.js
deleted file mode 100644
index 8a065e68..00000000
--- a/test/vehicle.unit.js
+++ /dev/null
@@ -1,88 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var sinon = require('sinon');
-  var faker = require('../lib').faker;
-}
-
-describe('vehicle.js', function () {
-  describe('vehicle()', function () {
-    it('returns a random vehicle', function () {
-      sinon.stub(faker.vehicle, 'vehicle').returns('Ford Explorer');
-      var vehicle = faker.vehicle.vehicle();
-
-      assert.strictEqual(vehicle, 'Ford Explorer');
-      faker.vehicle.vehicle.restore();
-    });
-  });
-
-  describe('manufacturer()', function () {
-    it('returns random manufacturer', function () {
-      sinon.stub(faker.vehicle, 'manufacturer').returns('Porsche');
-      var manufacturer = faker.vehicle.manufacturer();
-
-      assert.strictEqual(manufacturer, 'Porsche');
-      faker.vehicle.manufacturer.restore();
-    });
-  });
-
-  describe('type()', function () {
-    it('returns random vehicle type', function () {
-      sinon.stub(faker.vehicle, 'type').returns('Minivan');
-      var type = faker.vehicle.type();
-
-      assert.strictEqual(type, 'Minivan');
-      faker.vehicle.type.restore();
-    });
-  });
-
-  describe('fuel()', function () {
-    it('returns a fuel type', function () {
-      sinon.stub(faker.vehicle, 'fuel').returns('Hybrid');
-      var fuel = faker.vehicle.fuel();
-
-      assert.strictEqual(fuel, 'Hybrid');
-      faker.vehicle.fuel.restore();
-    });
-  });
-
-  describe('vin()', function () {
-    it('returns valid vin number', function () {
-      var vin = faker.vehicle.vin();
-      assert.ok(
-        vin.match(
-          /^([A-HJ-NPR-Z0-9]{10}[A-HJ-NPR-Z0-9]{1}[A-HJ-NPR-Z0-9]{1}\d{5})$/
-        )
-      );
-    });
-  });
-
-  describe('color()', function () {
-    it('returns a random color', function () {
-      sinon.stub(faker.vehicle, 'color').returns('black');
-      var color = faker.vehicle.color();
-
-      assert.strictEqual(color, 'black');
-      faker.vehicle.color.restore();
-    });
-  });
-
-  describe('vrm()', function () {
-    it('returns a random vrm', function () {
-      sinon.stub(faker.vehicle, 'vrm').returns('MF59EEW');
-      var vrm = faker.vehicle.vrm();
-
-      assert.equal(vrm, 'MF59EEW');
-      faker.vehicle.vrm.restore();
-    });
-  });
-
-  describe('bicycle()', function () {
-    it('returns a random type of bicycle', function () {
-      sinon.stub(faker.vehicle, 'bicycle').returns('Adventure Road Bicycle');
-      var bicycle = faker.vehicle.bicycle();
-
-      assert.equal(bicycle, 'Adventure Road Bicycle');
-      faker.vehicle.bicycle.restore();
-    });
-  });
-});
diff --git a/test/word.spec.ts b/test/word.spec.ts
new file mode 100644
index 00000000..3790861c
--- /dev/null
+++ b/test/word.spec.ts
@@ -0,0 +1,35 @@
+import { describe, expect, it } from 'vitest';
+import { faker } from '../lib';
+
+describe('word', () => {
+  const methods = [
+    'adjective',
+    'adverb',
+    'conjunction',
+    'interjection',
+    'noun',
+    'preposition',
+    'verb',
+  ];
+
+  // Perform the same three tests for each method.
+  methods.forEach((method) => {
+    describe(method + '()', () => {
+      it('returns random value from ' + method + ' array', () => {
+        const word = faker.word[method]();
+        expect(faker.definitions.word[method]).toContain(word);
+      });
+      it('optional length parameter returns expected result', () => {
+        const wordLength = 5;
+        const word = faker.word[method](wordLength);
+        expect(faker.definitions.word[method]).toContain(word);
+        expect(word.length).toBe(wordLength);
+      });
+      it('unresolvable optional length returns random ' + method, () => {
+        const wordLength = 1000;
+        const word = faker.word[method](wordLength);
+        expect(faker.definitions.word[method]).toContain(word);
+      });
+    });
+  });
+});
diff --git a/test/word.unit.js b/test/word.unit.js
deleted file mode 100644
index 9dc4755c..00000000
--- a/test/word.unit.js
+++ /dev/null
@@ -1,36 +0,0 @@
-if (typeof module !== 'undefined') {
-  var assert = require('assert');
-  var faker = require('../lib').faker;
-}
-
-describe('word.js', function () {
-  var methods = [
-    'adjective',
-    'adverb',
-    'conjunction',
-    'interjection',
-    'noun',
-    'preposition',
-    'verb',
-  ];
-  // Perform the same three tests for each method.
-  methods.forEach(function (method) {
-    describe(method + '()', function () {
-      it('returns random value from ' + method + ' array', function () {
-        var word = faker.word[method]();
-        assert.ok(faker.definitions.word[method].includes(word));
-      });
-      it('optional length parameter returns expected result', function () {
-        var wordLength = 5;
-        var word = faker.word[method](wordLength);
-        assert.ok(faker.definitions.word[method].includes(word));
-        assert.ok(word.length == wordLength);
-      });
-      it('unresolvable optional length returns random ' + method, function () {
-        var wordLength = 1000;
-        var word = faker.word[method](wordLength);
-        assert.ok(faker.definitions.word[method].includes(word));
-      });
-    });
-  });
-});