From a5f25f7fa1027df4b2e522728a3279f7f76e85ff Mon Sep 17 00:00:00 2001
From: Edwin Samodra <edwinsp001@gmail.com>
Date: Sat, 11 Sep 2021 21:00:27 +0700
Subject: rebuild bigInt generator pull request

---
 lib/datatype.js       | 14 ++++++++++++++
 test/datatype.unit.js | 23 +++++++++++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/lib/datatype.js b/lib/datatype.js
index 02ea3759..63ebd65c 100644
--- a/lib/datatype.js
+++ b/lib/datatype.js
@@ -220,6 +220,20 @@ function Datatype (faker, seed) {
 
   };
 
+  /**
+   * returns a Big Integer with values generated by faker.datatype.bigInt
+   * @method faker.datatype.bigInt
+   * @param { number } value 
+   */
+
+  this.bigInt = function bigInt(value) {
+    if(value === undefined){
+      value = Math.floor(Math.random() * 99999999999) + 10000000000;
+    }
+
+    return BigInt(value);
+  };
+
   return this;
 }
 
diff --git a/test/datatype.unit.js b/test/datatype.unit.js
index b206ca47..84a24fd5 100644
--- a/test/datatype.unit.js
+++ b/test/datatype.unit.js
@@ -286,4 +286,27 @@ describe("datatype.js", function () {
     });
   });
 
+  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();
+      }
+    });
+  });
+
 });
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