rewrite modal unit tests

2 files changed, 1576 insertions, 0 deletions

diff --git a/js/src/modal/modal.js b/js/src/modal/modal.js
new file mode 100644
index 000000000..4c430a01f
--- /dev/null
+++ b/js/src/modal/modal.js
@@ -0,0 +1,602 @@
+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap (v4.3.1): modal.js
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+import {
+  jQuery as $,
+  TRANSITION_END,
+  emulateTransitionEnd,
+  getSelectorFromElement,
+  getTransitionDurationFromElement,
+  isVisible,
+  makeArray,
+  reflow,
+  typeCheckConfig
+} from '../util/index'
+import Data from '../dom/data'
+import EventHandler from '../dom/event-handler'
+import Manipulator from '../dom/manipulator'
+import SelectorEngine from '../dom/selector-engine'
+
+/**
+ * ------------------------------------------------------------------------
+ * Constants
+ * ------------------------------------------------------------------------
+ */
+
+const NAME = 'modal'
+const VERSION = '4.3.1'
+const DATA_KEY = 'bs.modal'
+const EVENT_KEY = `.${DATA_KEY}`
+const DATA_API_KEY = '.data-api'
+const ESCAPE_KEYCODE = 27 // KeyboardEvent.which value for Escape (Esc) key
+
+const Default = {
+  backdrop: true,
+  keyboard: true,
+  focus: true,
+  show: true
+}
+
+const DefaultType = {
+  backdrop: '(boolean|string)',
+  keyboard: 'boolean',
+  focus: 'boolean',
+  show: 'boolean'
+}
+
+const Event = {
+  HIDE: `hide${EVENT_KEY}`,
+  HIDDEN: `hidden${EVENT_KEY}`,
+  SHOW: `show${EVENT_KEY}`,
+  SHOWN: `shown${EVENT_KEY}`,
+  FOCUSIN: `focusin${EVENT_KEY}`,
+  RESIZE: `resize${EVENT_KEY}`,
+  CLICK_DISMISS: `click.dismiss${EVENT_KEY}`,
+  KEYDOWN_DISMISS: `keydown.dismiss${EVENT_KEY}`,
+  MOUSEUP_DISMISS: `mouseup.dismiss${EVENT_KEY}`,
+  MOUSEDOWN_DISMISS: `mousedown.dismiss${EVENT_KEY}`,
+  CLICK_DATA_API: `click${EVENT_KEY}${DATA_API_KEY}`
+}
+
+const ClassName = {
+  SCROLLABLE: 'modal-dialog-scrollable',
+  SCROLLBAR_MEASURER: 'modal-scrollbar-measure',
+  BACKDROP: 'modal-backdrop',
+  OPEN: 'modal-open',
+  FADE: 'fade',
+  SHOW: 'show'
+}
+
+const Selector = {
+  DIALOG: '.modal-dialog',
+  MODAL_BODY: '.modal-body',
+  DATA_TOGGLE: '[data-toggle="modal"]',
+  DATA_DISMISS: '[data-dismiss="modal"]',
+  FIXED_CONTENT: '.fixed-top, .fixed-bottom, .is-fixed, .sticky-top',
+  STICKY_CONTENT: '.sticky-top'
+}
+
+/**
+ * ------------------------------------------------------------------------
+ * Class Definition
+ * ------------------------------------------------------------------------
+ */
+
+class Modal {
+  constructor(element, config) {
+    this._config = this._getConfig(config)
+    this._element = element
+    this._dialog = SelectorEngine.findOne(Selector.DIALOG, element)
+    this._backdrop = null
+    this._isShown = false
+    this._isBodyOverflowing = false
+    this._ignoreBackdropClick = false
+    this._isTransitioning = false
+    this._scrollbarWidth = 0
+    Data.setData(element, DATA_KEY, this)
+  }
+
+  // Getters
+
+  static get VERSION() {
+    return VERSION
+  }
+
+  static get Default() {
+    return Default
+  }
+
+  // Public
+
+  toggle(relatedTarget) {
+    return this._isShown ? this.hide() : this.show(relatedTarget)
+  }
+
+  show(relatedTarget) {
+    if (this._isShown || this._isTransitioning) {
+      return
+    }
+
+    if (this._element.classList.contains(ClassName.FADE)) {
+      this._isTransitioning = true
+    }
+
+    const showEvent = EventHandler.trigger(this._element, Event.SHOW, {
+      relatedTarget
+    })
+
+    if (this._isShown || showEvent.defaultPrevented) {
+      return
+    }
+
+    this._isShown = true
+
+    this._checkScrollbar()
+    this._setScrollbar()
+
+    this._adjustDialog()
+
+    this._setEscapeEvent()
+    this._setResizeEvent()
+
+    EventHandler.on(this._element,
+      Event.CLICK_DISMISS,
+      Selector.DATA_DISMISS,
+      event => this.hide(event)
+    )
+
+    EventHandler.on(this._dialog, Event.MOUSEDOWN_DISMISS, () => {
+      EventHandler.one(this._element, Event.MOUSEUP_DISMISS, event => {
+        if (event.target === this._element) {
+          this._ignoreBackdropClick = true
+        }
+      })
+    })
+
+    this._showBackdrop(() => this._showElement(relatedTarget))
+  }
+
+  hide(event) {
+    if (event) {
+      event.preventDefault()
+    }
+
+    if (!this._isShown || this._isTransitioning) {
+      return
+    }
+
+    const hideEvent = EventHandler.trigger(this._element, Event.HIDE)
+
+    if (hideEvent.defaultPrevented) {
+      return
+    }
+
+    this._isShown = false
+    const transition = this._element.classList.contains(ClassName.FADE)
+
+    if (transition) {
+      this._isTransitioning = true
+    }
+
+    this._setEscapeEvent()
+    this._setResizeEvent()
+
+    EventHandler.off(document, Event.FOCUSIN)
+
+    this._element.classList.remove(ClassName.SHOW)
+
+    EventHandler.off(this._element, Event.CLICK_DISMISS)
+    EventHandler.off(this._dialog, Event.MOUSEDOWN_DISMISS)
+
+    if (transition) {
+      const transitionDuration = getTransitionDurationFromElement(this._element)
+
+      EventHandler.one(this._element, TRANSITION_END, event => this._hideModal(event))
+      emulateTransitionEnd(this._element, transitionDuration)
+    } else {
+      this._hideModal()
+    }
+  }
+
+  dispose() {
+    [window, this._element, this._dialog]
+      .forEach(htmlElement => EventHandler.off(htmlElement, EVENT_KEY))
+
+    /**
+     * `document` has 2 events `Event.FOCUSIN` and `Event.CLICK_DATA_API`
+     * Do not move `document` in `htmlElements` array
+     * It will remove `Event.CLICK_DATA_API` event that should remain
+     */
+    EventHandler.off(document, Event.FOCUSIN)
+
+    Data.removeData(this._element, DATA_KEY)
+
+    this._config = null
+    this._element = null
+    this._dialog = null
+    this._backdrop = null
+    this._isShown = null
+    this._isBodyOverflowing = null
+    this._ignoreBackdropClick = null
+    this._isTransitioning = null
+    this._scrollbarWidth = null
+  }
+
+  handleUpdate() {
+    this._adjustDialog()
+  }
+
+  // Private
+
+  _getConfig(config) {
+    config = {
+      ...Default,
+      ...config
+    }
+    typeCheckConfig(NAME, config, DefaultType)
+    return config
+  }
+
+  _showElement(relatedTarget) {
+    const transition = this._element.classList.contains(ClassName.FADE)
+
+    if (!this._element.parentNode ||
+        this._element.parentNode.nodeType !== Node.ELEMENT_NODE) {
+      // Don't move modal's DOM position
+      document.body.appendChild(this._element)
+    }
+
+    this._element.style.display = 'block'
+    this._element.removeAttribute('aria-hidden')
+    this._element.setAttribute('aria-modal', true)
+
+    if (this._dialog.classList.contains(ClassName.SCROLLABLE)) {
+      SelectorEngine.findOne(Selector.MODAL_BODY, this._dialog).scrollTop = 0
+    } else {
+      this._element.scrollTop = 0
+    }
+
+    if (transition) {
+      reflow(this._element)
+    }
+
+    this._element.classList.add(ClassName.SHOW)
+
+    if (this._config.focus) {
+      this._enforceFocus()
+    }
+
+    const transitionComplete = () => {
+      if (this._config.focus) {
+        this._element.focus()
+      }
+
+      this._isTransitioning = false
+      EventHandler.trigger(this._element, Event.SHOWN, {
+        relatedTarget
+      })
+    }
+
+    if (transition) {
+      const transitionDuration = getTransitionDurationFromElement(this._dialog)
+
+      EventHandler.one(this._dialog, TRANSITION_END, transitionComplete)
+      emulateTransitionEnd(this._dialog, transitionDuration)
+    } else {
+      transitionComplete()
+    }
+  }
+
+  _enforceFocus() {
+    EventHandler.off(document, Event.FOCUSIN) // guard against infinite focus loop
+    EventHandler.on(document, Event.FOCUSIN, event => {
+      if (document !== event.target &&
+          this._element !== event.target &&
+          !this._element.contains(event.target)) {
+        this._element.focus()
+      }
+    })
+  }
+
+  _setEscapeEvent() {
+    if (this._isShown && this._config.keyboard) {
+      EventHandler.on(this._element, Event.KEYDOWN_DISMISS, event => {
+        if (event.which === ESCAPE_KEYCODE) {
+          event.preventDefault()
+          this.hide()
+        }
+      })
+    } else {
+      EventHandler.off(this._element, Event.KEYDOWN_DISMISS)
+    }
+  }
+
+  _setResizeEvent() {
+    if (this._isShown) {
+      EventHandler.on(window, Event.RESIZE, () => this._adjustDialog())
+    } else {
+      EventHandler.off(window, Event.RESIZE)
+    }
+  }
+
+  _hideModal() {
+    this._element.style.display = 'none'
+    this._element.setAttribute('aria-hidden', true)
+    this._element.removeAttribute('aria-modal')
+    this._isTransitioning = false
+    this._showBackdrop(() => {
+      document.body.classList.remove(ClassName.OPEN)
+      this._resetAdjustments()
+      this._resetScrollbar()
+      EventHandler.trigger(this._element, Event.HIDDEN)
+    })
+  }
+
+  _removeBackdrop() {
+    this._backdrop.parentNode.removeChild(this._backdrop)
+    this._backdrop = null
+  }
+
+  _showBackdrop(callback) {
+    const animate = this._element.classList.contains(ClassName.FADE) ?
+      ClassName.FADE :
+      ''
+
+    if (this._isShown && this._config.backdrop) {
+      this._backdrop = document.createElement('div')
+      this._backdrop.className = ClassName.BACKDROP
+
+      if (animate) {
+        this._backdrop.classList.add(animate)
+      }
+
+      document.body.appendChild(this._backdrop)
+
+      EventHandler.on(this._element, Event.CLICK_DISMISS, event => {
+        if (this._ignoreBackdropClick) {
+          this._ignoreBackdropClick = false
+          return
+        }
+
+        if (event.target !== event.currentTarget) {
+          return
+        }
+
+        if (this._config.backdrop === 'static') {
+          this._element.focus()
+        } else {
+          this.hide()
+        }
+      })
+
+      if (animate) {
+        reflow(this._backdrop)
+      }
+
+      this._backdrop.classList.add(ClassName.SHOW)
+
+      if (!animate) {
+        callback()
+        return
+      }
+
+      const backdropTransitionDuration = getTransitionDurationFromElement(this._backdrop)
+
+      EventHandler.one(this._backdrop, TRANSITION_END, callback)
+      emulateTransitionEnd(this._backdrop, backdropTransitionDuration)
+    } else if (!this._isShown && this._backdrop) {
+      this._backdrop.classList.remove(ClassName.SHOW)
+
+      const callbackRemove = () => {
+        this._removeBackdrop()
+        callback()
+      }
+
+      if (this._element.classList.contains(ClassName.FADE)) {
+        const backdropTransitionDuration = getTransitionDurationFromElement(this._backdrop)
+        EventHandler.one(this._backdrop, TRANSITION_END, callbackRemove)
+        emulateTransitionEnd(this._backdrop, backdropTransitionDuration)
+      } else {
+        callbackRemove()
+      }
+    } else {
+      callback()
+    }
+  }
+
+  // ----------------------------------------------------------------------
+  // the following methods are used to handle overflowing modals
+  // ----------------------------------------------------------------------
+
+  _adjustDialog() {
+    const isModalOverflowing =
+      this._element.scrollHeight > document.documentElement.clientHeight
+
+    if (!this._isBodyOverflowing && isModalOverflowing) {
+      this._element.style.paddingLeft = `${this._scrollbarWidth}px`
+    }
+
+    if (this._isBodyOverflowing && !isModalOverflowing) {
+      this._element.style.paddingRight = `${this._scrollbarWidth}px`
+    }
+  }
+
+  _resetAdjustments() {
+    this._element.style.paddingLeft = ''
+    this._element.style.paddingRight = ''
+  }
+
+  _checkScrollbar() {
+    const rect = document.body.getBoundingClientRect()
+    this._isBodyOverflowing = rect.left + rect.right < window.innerWidth
+    this._scrollbarWidth = this._getScrollbarWidth()
+  }
+
+  _setScrollbar() {
+    if (this._isBodyOverflowing) {
+      // Note: DOMNode.style.paddingRight returns the actual value or '' if not set
+      //   while $(DOMNode).css('padding-right') returns the calculated value or 0 if not set
+
+      // Adjust fixed content padding
+      makeArray(SelectorEngine.find(Selector.FIXED_CONTENT))
+        .forEach(element => {
+          const actualPadding = element.style.paddingRight
+          const calculatedPadding = window.getComputedStyle(element)['padding-right']
+          Manipulator.setDataAttribute(element, 'padding-right', actualPadding)
+          element.style.paddingRight = `${parseFloat(calculatedPadding) + this._scrollbarWidth}px`
+        })
+
+      // Adjust sticky content margin
+      makeArray(SelectorEngine.find(Selector.STICKY_CONTENT))
+        .forEach(element => {
+          const actualMargin = element.style.marginRight
+          const calculatedMargin = window.getComputedStyle(element)['margin-right']
+          Manipulator.setDataAttribute(element, 'margin-right', actualMargin)
+          element.style.marginRight = `${parseFloat(calculatedMargin) - this._scrollbarWidth}px`
+        })
+
+      // Adjust body padding
+      const actualPadding = document.body.style.paddingRight
+      const calculatedPadding = window.getComputedStyle(document.body)['padding-right']
+
+      Manipulator.setDataAttribute(document.body, 'padding-right', actualPadding)
+      document.body.style.paddingRight = `${parseFloat(calculatedPadding) + this._scrollbarWidth}px`
+    }
+
+    document.body.classList.add(ClassName.OPEN)
+  }
+
+  _resetScrollbar() {
+    // Restore fixed content padding
+    makeArray(SelectorEngine.find(Selector.FIXED_CONTENT))
+      .forEach(element => {
+        const padding = Manipulator.getDataAttribute(element, 'padding-right')
+        if (typeof padding !== 'undefined') {
+          Manipulator.removeDataAttribute(element, 'padding-right')
+          element.style.paddingRight = padding
+        }
+      })
+
+    // Restore sticky content and navbar-toggler margin
+    makeArray(SelectorEngine.find(`${Selector.STICKY_CONTENT}`))
+      .forEach(element => {
+        const margin = Manipulator.getDataAttribute(element, 'margin-right')
+        if (typeof margin !== 'undefined') {
+          Manipulator.removeDataAttribute(element, 'margin-right')
+          element.style.marginRight = margin
+        }
+      })
+
+    // Restore body padding
+    const padding = Manipulator.getDataAttribute(document.body, 'padding-right')
+    if (typeof padding === 'undefined') {
+      document.body.style.paddingRight = ''
+    } else {
+      Manipulator.removeDataAttribute(document.body, 'padding-right')
+      document.body.style.paddingRight = padding
+    }
+  }
+
+  _getScrollbarWidth() { // thx d.walsh
+    const scrollDiv = document.createElement('div')
+    scrollDiv.className = ClassName.SCROLLBAR_MEASURER
+    document.body.appendChild(scrollDiv)
+    const scrollbarWidth = scrollDiv.getBoundingClientRect().width - scrollDiv.clientWidth
+    document.body.removeChild(scrollDiv)
+    return scrollbarWidth
+  }
+
+  // Static
+
+  static _jQueryInterface(config, relatedTarget) {
+    return this.each(function () {
+      let data = Data.getData(this, DATA_KEY)
+      const _config = {
+        ...Default,
+        ...Manipulator.getDataAttributes(this),
+        ...typeof config === 'object' && config ? config : {}
+      }
+
+      if (!data) {
+        data = new Modal(this, _config)
+      }
+
+      if (typeof config === 'string') {
+        if (typeof data[config] === 'undefined') {
+          throw new TypeError(`No method named "${config}"`)
+        }
+
+        data[config](relatedTarget)
+      } else if (_config.show) {
+        data.show(relatedTarget)
+      }
+    })
+  }
+
+  static _getInstance(element) {
+    return Data.getData(element, DATA_KEY)
+  }
+}
+
+/**
+ * ------------------------------------------------------------------------
+ * Data Api implementation
+ * ------------------------------------------------------------------------
+ */
+
+EventHandler.on(document, Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
+  const selector = getSelectorFromElement(this)
+  const target = SelectorEngine.findOne(selector)
+
+  if (this.tagName === 'A' || this.tagName === 'AREA') {
+    event.preventDefault()
+  }
+
+  EventHandler.one(target, Event.SHOW, showEvent => {
+    if (showEvent.defaultPrevented) {
+      // only register focus restorer if modal will actually get shown
+      return
+    }
+
+    EventHandler.one(target, Event.HIDDEN, () => {
+      if (isVisible(this)) {
+        this.focus()
+      }
+    })
+  })
+
+  let data = Data.getData(target, DATA_KEY)
+  if (!data) {
+    const config = {
+      ...Manipulator.getDataAttributes(target),
+      ...Manipulator.getDataAttributes(this)
+    }
+
+    data = new Modal(target, config)
+  }
+
+  data.show(this)
+})
+
+/**
+ * ------------------------------------------------------------------------
+ * jQuery
+ * ------------------------------------------------------------------------
+ * add .modal to jQuery only if jQuery is present
+ */
+/* istanbul ignore if */
+if (typeof $ !== 'undefined') {
+  const JQUERY_NO_CONFLICT = $.fn[NAME]
+  $.fn[NAME] = Modal._jQueryInterface
+  $.fn[NAME].Constructor = Modal
+  $.fn[NAME].noConflict = () => {
+    $.fn[NAME] = JQUERY_NO_CONFLICT
+    return Modal._jQueryInterface
+  }
+}
+
+export default Modal
diff --git a/js/src/modal/modal.spec.js b/js/src/modal/modal.spec.js
new file mode 100644
index 000000000..f1311c591
--- /dev/null
+++ b/js/src/modal/modal.spec.js
@@ -0,0 +1,974 @@
+import Modal from './modal'
+import EventHandler from '../dom/event-handler'
+import { makeArray } from '../util/index'
+
+/** Test helpers */
+import { getFixture, clearFixture, createEvent, jQueryMock } from '../../tests/helpers/fixture'
+
+describe('Modal', () => {
+  let fixtureEl
+  let style
+
+  beforeAll(() => {
+    fixtureEl = getFixture()
+
+    // Enable the scrollbar measurer
+    const css = '.modal-scrollbar-measure { position: absolute; top: -9999px; width: 50px; height: 50px; overflow: scroll; }'
+
+    style = document.createElement('style')
+    style.type = 'text/css'
+    style.appendChild(document.createTextNode(css))
+
+    document.head.appendChild(style)
+
+    // Simulate scrollbars
+    document.documentElement.style.paddingRight = '16px'
+  })
+
+  afterEach(() => {
+    clearFixture()
+
+    document.body.classList.remove('modal-open')
+    document.body.removeAttribute('style')
+    document.body.removeAttribute('data-padding-right')
+    const backdropList = makeArray(document.querySelectorAll('.modal-backdrop'))
+
+    backdropList.forEach(backdrop => {
+      document.body.removeChild(backdrop)
+    })
+
+    document.body.style.paddingRight = '0px'
+  })
+
+  afterAll(() => {
+    document.head.removeChild(style)
+    document.documentElement.style.paddingRight = '0px'
+  })
+
+  describe('VERSION', () => {
+    it('should return plugin version', () => {
+      expect(Modal.VERSION).toEqual(jasmine.any(String))
+    })
+  })
+
+  describe('Default', () => {
+    it('should return plugin default config', () => {
+      expect(Modal.Default).toEqual(jasmine.any(Object))
+    })
+  })
+
+  describe('toggle', () => {
+    it('should toggle a modal', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+      const originalPadding = '0px'
+
+      document.body.style.paddingRight = originalPadding
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        expect(document.body.getAttribute('data-padding-right')).toEqual(originalPadding, 'original body padding should be stored in data-padding-right')
+        modal.toggle()
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        expect(document.body.getAttribute('data-padding-right')).toBeNull()
+        expect().nothing()
+        done()
+      })
+
+      modal.toggle()
+    })
+
+    it('should adjust the inline padding of fixed elements when opening and restore when closing', done => {
+      fixtureEl.innerHTML = [
+        '<div class="fixed-top" style="padding-right: 0px"></div>',
+        '<div class="modal"><div class="modal-dialog" /></div>'
+      ].join('')
+
+      const fixedEl = fixtureEl.querySelector('.fixed-top')
+      const originalPadding = parseInt(window.getComputedStyle(fixedEl).paddingRight, 10)
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        const expectedPadding = originalPadding + modal._getScrollbarWidth()
+        const currentPadding = parseInt(window.getComputedStyle(modalEl).paddingRight, 10)
+
+        expect(fixedEl.getAttribute('data-padding-right')).toEqual('0px', 'original fixed element padding should be stored in data-padding-right')
+        expect(currentPadding).toEqual(expectedPadding, 'fixed element padding should be adjusted while opening')
+        modal.toggle()
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        const currentPadding = parseInt(window.getComputedStyle(modalEl).paddingRight, 10)
+
+        expect(fixedEl.getAttribute('data-padding-right')).toEqual(null, 'data-padding-right should be cleared after closing')
+        expect(currentPadding).toEqual(originalPadding, 'fixed element padding should be reset after closing')
+        done()
+      })
+
+      modal.toggle()
+    })
+
+    it('should adjust the inline margin of sticky elements when opening and restore when closing', done => {
+      fixtureEl.innerHTML = [
+        '<div class="sticky-top" style="margin-right: 0px;"></div>',
+        '<div class="modal"><div class="modal-dialog" /></div>'
+      ].join('')
+
+      const stickyTopEl = fixtureEl.querySelector('.sticky-top')
+      const originalMargin = parseInt(window.getComputedStyle(stickyTopEl).marginRight, 10)
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        const expectedMargin = originalMargin - modal._getScrollbarWidth()
+        const currentMargin = parseInt(window.getComputedStyle(stickyTopEl).marginRight, 10)
+
+        expect(stickyTopEl.getAttribute('data-margin-right')).toEqual('0px', 'original sticky element margin should be stored in data-margin-right')
+        expect(currentMargin).toEqual(expectedMargin, 'sticky element margin should be adjusted while opening')
+        modal.toggle()
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        const currentMargin = parseInt(window.getComputedStyle(stickyTopEl).marginRight, 10)
+
+        expect(stickyTopEl.getAttribute('data-margin-right')).toEqual(null, 'data-margin-right should be cleared after closing')
+        expect(currentMargin).toEqual(originalMargin, 'sticky element margin should be reset after closing')
+        done()
+      })
+
+      modal.toggle()
+    })
+
+    it('should ignore values set via CSS when trying to restore body padding after closing', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+      const styleTest = document.createElement('style')
+
+      styleTest.type = 'text/css'
+      styleTest.appendChild(document.createTextNode('body { padding-right: 7px; }'))
+      document.head.appendChild(styleTest)
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        modal.toggle()
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        expect(window.getComputedStyle(document.body).paddingLeft).toEqual('0px', 'body does not have inline padding set')
+        document.head.removeChild(styleTest)
+        done()
+      })
+
+      modal.toggle()
+    })
+
+    it('should ignore other inline styles when trying to restore body padding after closing', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+      const styleTest = document.createElement('style')
+
+      styleTest.type = 'text/css'
+      styleTest.appendChild(document.createTextNode('body { padding-right: 7px; }'))
+
+      document.head.appendChild(styleTest)
+      document.body.style.color = 'red'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        modal.toggle()
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        const bodyPaddingRight = document.body.style.paddingRight
+
+        expect(bodyPaddingRight === '0px' || bodyPaddingRight === '').toEqual(true, 'body does not have inline padding set')
+        expect(document.body.style.color).toEqual('red', 'body still has other inline styles set')
+        document.head.removeChild(styleTest)
+        document.body.removeAttribute('style')
+        done()
+      })
+
+      modal.toggle()
+    })
+
+    it('should properly restore non-pixel inline body padding after closing', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      document.body.style.paddingRight = '5%'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        modal.toggle()
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        expect(document.body.style.paddingRight).toEqual('5%')
+        document.body.removeAttribute('style')
+        done()
+      })
+
+      modal.toggle()
+    })
+  })
+
+  describe('show', () => {
+    it('should show a modal', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('show.bs.modal', e => {
+        expect(e).toBeDefined()
+      })
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        expect(modalEl.getAttribute('aria-modal')).toEqual('true')
+        expect(modalEl.getAttribute('aria-hidden')).toEqual(null)
+        expect(modalEl.style.display).toEqual('block')
+        expect(document.querySelector('.modal-backdrop')).toBeDefined()
+        done()
+      })
+
+      modal.show()
+    })
+
+    it('should show a modal without backdrop', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl, {
+        backdrop: false
+      })
+
+      modalEl.addEventListener('show.bs.modal', e => {
+        expect(e).toBeDefined()
+      })
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        expect(modalEl.getAttribute('aria-modal')).toEqual('true')
+        expect(modalEl.getAttribute('aria-hidden')).toEqual(null)
+        expect(modalEl.style.display).toEqual('block')
+        expect(document.querySelector('.modal-backdrop')).toBeNull()
+        done()
+      })
+
+      modal.show()
+    })
+
+    it('should show a modal and append the element', done => {
+      const modalEl = document.createElement('div')
+      const id = 'dynamicModal'
+
+      modalEl.setAttribute('id', id)
+      modalEl.classList.add('modal')
+      modalEl.innerHTML = '<div class="modal-dialog"></div>'
+
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        const dynamicModal = document.getElementById(id)
+        expect(dynamicModal).toBeDefined()
+        dynamicModal.parentNode.removeChild(dynamicModal)
+        done()
+      })
+
+      modal.show()
+    })
+
+    it('should do nothing if a modal is shown', () => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      spyOn(EventHandler, 'trigger')
+      modal._isShown = true
+
+      modal.show()
+
+      expect(EventHandler.trigger).not.toHaveBeenCalled()
+    })
+
+    it('should do nothing if a modal is transitioning', () => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      spyOn(EventHandler, 'trigger')
+      modal._isTransitioning = true
+
+      modal.show()
+
+      expect(EventHandler.trigger).not.toHaveBeenCalled()
+    })
+
+    it('should not fire shown event when show is prevented', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('show.bs.modal', e => {
+        e.preventDefault()
+
+        const expectedDone = () => {
+          expect().nothing()
+          done()
+        }
+
+        setTimeout(expectedDone, 10)
+      })
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        throw new Error('shown event triggered')
+      })
+
+      modal.show()
+    })
+
+    it('should set is transitioning if fade class is present', done => {
+      fixtureEl.innerHTML = '<div class="modal fade"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('show.bs.modal', () => {
+        expect(modal._isTransitioning).toEqual(true)
+      })
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        expect(modal._isTransitioning).toEqual(false)
+        done()
+      })
+
+      modal.show()
+    })
+
+    it('should close modal when a click occured on data-dismiss="modal"', done => {
+      fixtureEl.innerHTML = [
+        '<div class="modal fade">',
+        '  <div class="modal-dialog">',
+        '    <div class="modal-header">',
+        '      <button type="button" data-dismiss="modal"></button>',
+        '    </div>',
+        '  </div>',
+        '</div>'
+      ].join('')
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const btnClose = fixtureEl.querySelector('[data-dismiss="modal"]')
+      const modal = new Modal(modalEl)
+
+      spyOn(modal, 'hide').and.callThrough()
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        btnClose.click()
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        expect(modal.hide).toHaveBeenCalled()
+        done()
+      })
+
+      modal.show()
+    })
+
+    it('should set modal body scroll top to 0 if .modal-dialog-scrollable', done => {
+      fixtureEl.innerHTML = [
+        '<div class="modal fade">',
+        '  <div class="modal-dialog modal-dialog-scrollable">',
+        '    <div class="modal-body"></div>',
+        '  </div>',
+        '</div>'
+      ].join('')
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modalBody = modalEl.querySelector('.modal-body')
+      const modal = new Modal(modalEl)
+
+      spyOn(modal, 'hide').and.callThrough()
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        expect(modalBody.scrollTop).toEqual(0)
+        done()
+      })
+
+      modal.show()
+    })
+
+    it('should not enforce focus if focus equal to false', done => {
+      fixtureEl.innerHTML = '<div class="modal fade"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl, {
+        focus: false
+      })
+
+      spyOn(modal, '_enforceFocus')
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        expect(modal._enforceFocus).not.toHaveBeenCalled()
+        done()
+      })
+
+      modal.show()
+    })
+
+    it('should add listener when escape touch is pressed', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      spyOn(modal, 'hide').and.callThrough()
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        const keydownEscape = createEvent('keydown')
+        keydownEscape.which = 27
+
+        modalEl.dispatchEvent(keydownEscape)
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        expect(modal.hide).toHaveBeenCalled()
+        done()
+      })
+
+      modal.show()
+    })
+
+    it('should do nothing when the pressed key is not escape', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      spyOn(modal, 'hide')
+
+      const expectDone = () => {
+        expect(modal.hide).not.toHaveBeenCalled()
+
+        done()
+      }
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        const keydownTab = createEvent('keydown')
+        keydownTab.which = 9
+
+        modalEl.dispatchEvent(keydownTab)
+        setTimeout(expectDone, 30)
+      })
+
+      modal.show()
+    })
+
+    it('should adjust dialog on resize', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      spyOn(modal, '_adjustDialog').and.callThrough()
+
+      const expectDone = () => {
+        expect(modal._adjustDialog).toHaveBeenCalled()
+
+        done()
+      }
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        const resizeEvent = createEvent('resize')
+
+        window.dispatchEvent(resizeEvent)
+        setTimeout(expectDone, 10)
+      })
+
+      modal.show()
+    })
+
+    it('should not close modal when clicking outside of modal-content if backdrop = false', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl, {
+        backdrop: false
+      })
+
+      const shownCallback = () => {
+        setTimeout(() => {
+          expect(modal._isShown).toEqual(true)
+          done()
+        }, 10)
+      }
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        modalEl.click()
+        shownCallback()
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        throw new Error('Should not hide a modal')
+      })
+
+      modal.show()
+    })
+
+    it('should not adjust the inline body padding when it does not overflow', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+      const originalPadding = window.getComputedStyle(document.body).paddingRight
+
+      // Hide scrollbars to prevent the body overflowing
+      document.body.style.overflow = 'hidden'
+      document.documentElement.style.paddingRight = '0px'
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        const currentPadding = window.getComputedStyle(document.body).paddingRight
+
+        expect(currentPadding).toEqual(originalPadding, 'body padding should not be adjusted')
+
+        // Restore scrollbars
+        document.body.style.overflow = 'auto'
+        document.documentElement.style.paddingRight = '16px'
+        done()
+      })
+
+      modal.show()
+    })
+
+    it('should enforce focus', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const isIE11 = Boolean(window.MSInputMethodContext) && Boolean(document.documentMode)
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      spyOn(modal, '_enforceFocus').and.callThrough()
+
+      const focusInListener = () => {
+        expect(modal._element.focus).toHaveBeenCalled()
+        document.removeEventListener('focusin', focusInListener)
+        done()
+      }
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        expect(modal._enforceFocus).toHaveBeenCalled()
+
+        if (isIE11) {
+          done()
+          return
+        }
+
+        spyOn(modal._element, 'focus')
+
+        document.addEventListener('focusin', focusInListener)
+
+        const focusInEvent = createEvent('focusin', { bubbles: true })
+        Object.defineProperty(focusInEvent, 'target', {
+          value: fixtureEl
+        })
+
+        document.dispatchEvent(focusInEvent)
+      })
+
+      modal.show()
+    })
+  })
+
+  describe('hide', () => {
+    it('should hide a modal', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        modal.hide()
+      })
+
+      modalEl.addEventListener('hide.bs.modal', e => {
+        expect(e).toBeDefined()
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        expect(modalEl.getAttribute('aria-modal')).toEqual(null)
+        expect(modalEl.getAttribute('aria-hidden')).toEqual('true')
+        expect(modalEl.style.display).toEqual('none')
+        expect(document.querySelector('.modal-backdrop')).toBeNull()
+        done()
+      })
+
+      modal.show()
+    })
+
+    it('should close modal when clicking outside of modal-content', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        modalEl.click()
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        expect(modalEl.getAttribute('aria-modal')).toEqual(null)
+        expect(modalEl.getAttribute('aria-hidden')).toEqual('true')
+        expect(modalEl.style.display).toEqual('none')
+        expect(document.querySelector('.modal-backdrop')).toBeNull()
+        done()
+      })
+
+      modal.show()
+    })
+
+    it('should do nothing is the modal is not shown', () => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modal.hide()
+
+      expect().nothing()
+    })
+
+    it('should do nothing is the modal is transitioning', () => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modal._isTransitioning = true
+      modal.hide()
+
+      expect().nothing()
+    })
+
+    it('should not hide a modal if hide is prevented', done => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        modal.hide()
+      })
+
+      const hideCallback = () => {
+        setTimeout(() => {
+          expect(modal._isShown).toEqual(true)
+          done()
+        }, 10)
+      }
+
+      modalEl.addEventListener('hide.bs.modal', e => {
+        e.preventDefault()
+        hideCallback()
+      })
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        throw new Error('should not trigger hidden')
+      })
+
+      modal.show()
+    })
+  })
+
+  describe('dispose', () => {
+    it('should dispose a modal', () => {
+      fixtureEl.innerHTML = '<div id="exampleModal" class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      expect(Modal._getInstance(modalEl)).toEqual(modal)
+
+      spyOn(EventHandler, 'off')
+
+      modal.dispose()
+
+      expect(Modal._getInstance(modalEl)).toEqual(null)
+      expect(EventHandler.off).toHaveBeenCalledTimes(4)
+    })
+  })
+
+  describe('handleUpdate', () => {
+    it('should call adjust dialog', () => {
+      fixtureEl.innerHTML = '<div id="exampleModal" class="modal"><div class="modal-dialog" /></div>'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+
+      spyOn(modal, '_adjustDialog')
+
+      modal.handleUpdate()
+
+      expect(modal._adjustDialog).toHaveBeenCalled()
+    })
+  })
+
+  describe('data-api', () => {
+    it('should open modal', done => {
+      fixtureEl.innerHTML = [
+        '<button type="button" data-toggle="modal" data-target="#exampleModal"></button>',
+        '<div id="exampleModal" class="modal"><div class="modal-dialog" /></div>'
+      ].join('')
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const trigger = fixtureEl.querySelector('[data-toggle="modal"]')
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        expect(modalEl.getAttribute('aria-modal')).toEqual('true')
+        expect(modalEl.getAttribute('aria-hidden')).toEqual(null)
+        expect(modalEl.style.display).toEqual('block')
+        expect(document.querySelector('.modal-backdrop')).toBeDefined()
+        done()
+      })
+
+      trigger.click()
+    })
+
+    it('should not recreate a new modal', done => {
+      fixtureEl.innerHTML = [
+        '<button type="button" data-toggle="modal" data-target="#exampleModal"></button>',
+        '<div id="exampleModal" class="modal"><div class="modal-dialog" /></div>'
+      ].join('')
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const modal = new Modal(modalEl)
+      const trigger = fixtureEl.querySelector('[data-toggle="modal"]')
+
+      spyOn(modal, 'show').and.callThrough()
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        expect(modal.show).toHaveBeenCalled()
+        done()
+      })
+
+      trigger.click()
+    })
+
+    it('should prevent default when the trigger is <a> or <area>', done => {
+      fixtureEl.innerHTML = [
+        '<a data-toggle="modal" href="#" data-target="#exampleModal"></a>',
+        '<div id="exampleModal" class="modal"><div class="modal-dialog" /></div>'
+      ].join('')
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const trigger = fixtureEl.querySelector('[data-toggle="modal"]')
+
+      spyOn(Event.prototype, 'preventDefault').and.callThrough()
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        expect(modalEl.getAttribute('aria-modal')).toEqual('true')
+        expect(modalEl.getAttribute('aria-hidden')).toEqual(null)
+        expect(modalEl.style.display).toEqual('block')
+        expect(document.querySelector('.modal-backdrop')).toBeDefined()
+        expect(Event.prototype.preventDefault).toHaveBeenCalled()
+        done()
+      })
+
+      trigger.click()
+    })
+
+    it('should focus the trigger on hide', done => {
+      fixtureEl.innerHTML = [
+        '<a data-toggle="modal" href="#" data-target="#exampleModal"></a>',
+        '<div id="exampleModal" class="modal"><div class="modal-dialog" /></div>'
+      ].join('')
+
+      // the element must be displayed, without that activeElement won't change
+      fixtureEl.style.display = 'block'
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const trigger = fixtureEl.querySelector('[data-toggle="modal"]')
+
+      spyOn(trigger, 'focus')
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        const modal = Modal._getInstance(modalEl)
+
+        modal.hide()
+      })
+
+      const hideListener = () => {
+        setTimeout(() => {
+          expect(trigger.focus).toHaveBeenCalled()
+          fixtureEl.style.display = 'none'
+          done()
+        }, 20)
+      }
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        hideListener()
+      })
+
+      trigger.click()
+    })
+
+    it('should not focus the trigger if the modal is not visible', done => {
+      fixtureEl.innerHTML = [
+        '<a data-toggle="modal" href="#" data-target="#exampleModal"></a>',
+        '<div id="exampleModal" class="modal"><div class="modal-dialog" /></div>'
+      ].join('')
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const trigger = fixtureEl.querySelector('[data-toggle="modal"]')
+
+      spyOn(trigger, 'focus')
+
+      modalEl.addEventListener('shown.bs.modal', () => {
+        const modal = Modal._getInstance(modalEl)
+
+        modal.hide()
+      })
+
+      const hideListener = () => {
+        setTimeout(() => {
+          expect(trigger.focus).not.toHaveBeenCalled()
+          done()
+        }, 20)
+      }
+
+      modalEl.addEventListener('hidden.bs.modal', () => {
+        hideListener()
+      })
+
+      trigger.click()
+    })
+
+    it('should not focus the trigger if the modal is not shown', done => {
+      fixtureEl.innerHTML = [
+        '<a data-toggle="modal" href="#" data-target="#exampleModal"></a>',
+        '<div id="exampleModal" class="modal"><div class="modal-dialog" /></div>'
+      ].join('')
+
+      const modalEl = fixtureEl.querySelector('.modal')
+      const trigger = fixtureEl.querySelector('[data-toggle="modal"]')
+
+      spyOn(trigger, 'focus')
+
+      const showListener = () => {
+        setTimeout(() => {
+          expect(trigger.focus).not.toHaveBeenCalled()
+          done()
+        }, 10)
+      }
+
+      modalEl.addEventListener('show.bs.modal', e => {
+        e.preventDefault()
+        showListener()
+      })
+
+      trigger.click()
+    })
+  })
+
+  describe('_jQueryInterface', () => {
+    it('should create a modal', () => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      jQueryMock.fn.modal = Modal._jQueryInterface
+      jQueryMock.elements = [div]
+
+      jQueryMock.fn.modal.call(jQueryMock)
+
+      expect(Modal._getInstance(div)).toBeDefined()
+    })
+
+    it('should not re create a modal', () => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const modal = new Modal(div)
+
+      jQueryMock.fn.modal = Modal._jQueryInterface
+      jQueryMock.elements = [div]
+
+      jQueryMock.fn.modal.call(jQueryMock)
+
+      expect(Modal._getInstance(div)).toEqual(modal)
+    })
+
+    it('should throw error on undefined method', () => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const action = 'undefinedMethod'
+
+      jQueryMock.fn.modal = Modal._jQueryInterface
+      jQueryMock.elements = [div]
+
+      try {
+        jQueryMock.fn.modal.call(jQueryMock, action)
+      } catch (error) {
+        expect(error.message).toEqual(`No method named "${action}"`)
+      }
+    })
+
+    it('should should call show method', () => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const modal = new Modal(div)
+
+      jQueryMock.fn.modal = Modal._jQueryInterface
+      jQueryMock.elements = [div]
+
+      spyOn(modal, 'show')
+
+      jQueryMock.fn.modal.call(jQueryMock, 'show')
+
+      expect(modal.show).toHaveBeenCalled()
+    })
+
+    it('should should not call show method', () => {
+      fixtureEl.innerHTML = '<div class="modal" data-show="false"><div class="modal-dialog" /></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      jQueryMock.fn.modal = Modal._jQueryInterface
+      jQueryMock.elements = [div]
+
+      spyOn(Modal.prototype, 'show')
+
+      jQueryMock.fn.modal.call(jQueryMock)
+
+      expect(Modal.prototype.show).not.toHaveBeenCalled()
+    })
+  })
+
+  describe('_getInstance', () => {
+    it('should return modal instance', () => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const modal = new Modal(div)
+
+      expect(Modal._getInstance(div)).toEqual(modal)
+    })
+
+    it('should return null when there is no modal instance', () => {
+      fixtureEl.innerHTML = '<div class="modal"><div class="modal-dialog" /></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      expect(Modal._getInstance(div)).toEqual(null)
+    })
+  })
+})