return to the original file structure to avoid breaking modularity

2 files changed, 0 insertions, 2109 deletions

diff --git a/js/src/dropdown/dropdown.js b/js/src/dropdown/dropdown.js
deleted file mode 100644
index b84035689..000000000
--- a/js/src/dropdown/dropdown.js
+++ /dev/null
@@ -1,545 +0,0 @@
-/**
- * --------------------------------------------------------------------------
- * Bootstrap (v4.3.1): dropdown.js
- * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
- * --------------------------------------------------------------------------
- */
-
-import {
-  getjQuery,
-  getElementFromSelector,
-  isElement,
-  makeArray,
-  noop,
-  typeCheckConfig
-} from '../util/index'
-import Data from '../dom/data'
-import EventHandler from '../dom/event-handler'
-import Manipulator from '../dom/manipulator'
-import Popper from 'popper.js'
-import SelectorEngine from '../dom/selector-engine'
-
-/**
- * ------------------------------------------------------------------------
- * Constants
- * ------------------------------------------------------------------------
- */
-
-const NAME = 'dropdown'
-const VERSION = '4.3.1'
-const DATA_KEY = 'bs.dropdown'
-const EVENT_KEY = `.${DATA_KEY}`
-const DATA_API_KEY = '.data-api'
-const ESCAPE_KEYCODE = 27 // KeyboardEvent.which value for Escape (Esc) key
-const SPACE_KEYCODE = 32 // KeyboardEvent.which value for space key
-const TAB_KEYCODE = 9 // KeyboardEvent.which value for tab key
-const ARROW_UP_KEYCODE = 38 // KeyboardEvent.which value for up arrow key
-const ARROW_DOWN_KEYCODE = 40 // KeyboardEvent.which value for down arrow key
-const RIGHT_MOUSE_BUTTON_WHICH = 3 // MouseEvent.which value for the right button (assuming a right-handed mouse)
-const REGEXP_KEYDOWN = new RegExp(`${ARROW_UP_KEYCODE}|${ARROW_DOWN_KEYCODE}|${ESCAPE_KEYCODE}`)
-
-const Event = {
-  HIDE: `hide${EVENT_KEY}`,
-  HIDDEN: `hidden${EVENT_KEY}`,
-  SHOW: `show${EVENT_KEY}`,
-  SHOWN: `shown${EVENT_KEY}`,
-  CLICK: `click${EVENT_KEY}`,
-  CLICK_DATA_API: `click${EVENT_KEY}${DATA_API_KEY}`,
-  KEYDOWN_DATA_API: `keydown${EVENT_KEY}${DATA_API_KEY}`,
-  KEYUP_DATA_API: `keyup${EVENT_KEY}${DATA_API_KEY}`
-}
-
-const ClassName = {
-  DISABLED: 'disabled',
-  SHOW: 'show',
-  DROPUP: 'dropup',
-  DROPRIGHT: 'dropright',
-  DROPLEFT: 'dropleft',
-  MENURIGHT: 'dropdown-menu-right',
-  POSITION_STATIC: 'position-static'
-}
-
-const Selector = {
-  DATA_TOGGLE: '[data-toggle="dropdown"]',
-  FORM_CHILD: '.dropdown form',
-  MENU: '.dropdown-menu',
-  NAVBAR_NAV: '.navbar-nav',
-  VISIBLE_ITEMS: '.dropdown-menu .dropdown-item:not(.disabled):not(:disabled)'
-}
-
-const AttachmentMap = {
-  TOP: 'top-start',
-  TOPEND: 'top-end',
-  BOTTOM: 'bottom-start',
-  BOTTOMEND: 'bottom-end',
-  RIGHT: 'right-start',
-  RIGHTEND: 'right-end',
-  LEFT: 'left-start',
-  LEFTEND: 'left-end'
-}
-
-const Default = {
-  offset: 0,
-  flip: true,
-  boundary: 'scrollParent',
-  reference: 'toggle',
-  display: 'dynamic',
-  popperConfig: null
-}
-
-const DefaultType = {
-  offset: '(number|string|function)',
-  flip: 'boolean',
-  boundary: '(string|element)',
-  reference: '(string|element)',
-  display: 'string',
-  popperConfig: '(null|object)'
-}
-
-/**
- * ------------------------------------------------------------------------
- * Class Definition
- * ------------------------------------------------------------------------
- */
-
-class Dropdown {
-  constructor(element, config) {
-    this._element = element
-    this._popper = null
-    this._config = this._getConfig(config)
-    this._menu = this._getMenuElement()
-    this._inNavbar = this._detectNavbar()
-
-    this._addEventListeners()
-    Data.setData(element, DATA_KEY, this)
-  }
-
-  // Getters
-
-  static get VERSION() {
-    return VERSION
-  }
-
-  static get Default() {
-    return Default
-  }
-
-  static get DefaultType() {
-    return DefaultType
-  }
-
-  // Public
-
-  toggle() {
-    if (this._element.disabled || this._element.classList.contains(ClassName.DISABLED)) {
-      return
-    }
-
-    const isActive = this._menu.classList.contains(ClassName.SHOW)
-
-    Dropdown.clearMenus()
-
-    if (isActive) {
-      return
-    }
-
-    this.show()
-  }
-
-  show() {
-    if (this._element.disabled || this._element.classList.contains(ClassName.DISABLED) || this._menu.classList.contains(ClassName.SHOW)) {
-      return
-    }
-
-    const parent = Dropdown.getParentFromElement(this._element)
-    const relatedTarget = {
-      relatedTarget: this._element
-    }
-
-    const showEvent = EventHandler.trigger(parent, Event.SHOW, relatedTarget)
-
-    if (showEvent.defaultPrevented) {
-      return
-    }
-
-    // Disable totally Popper.js for Dropdown in Navbar
-    if (!this._inNavbar) {
-      if (typeof Popper === 'undefined') {
-        throw new TypeError('Bootstrap\'s dropdowns require Popper.js (https://popper.js.org)')
-      }
-
-      let referenceElement = this._element
-
-      if (this._config.reference === 'parent') {
-        referenceElement = parent
-      } else if (isElement(this._config.reference)) {
-        referenceElement = this._config.reference
-
-        // Check if it's jQuery element
-        if (typeof this._config.reference.jquery !== 'undefined') {
-          referenceElement = this._config.reference[0]
-        }
-      }
-
-      // If boundary is not `scrollParent`, then set position to `static`
-      // to allow the menu to "escape" the scroll parent's boundaries
-      // https://github.com/twbs/bootstrap/issues/24251
-      if (this._config.boundary !== 'scrollParent') {
-        parent.classList.add(ClassName.POSITION_STATIC)
-      }
-
-      this._popper = new Popper(referenceElement, this._menu, this._getPopperConfig())
-    }
-
-    // If this is a touch-enabled device we add extra
-    // empty mouseover listeners to the body's immediate children;
-    // only needed because of broken event delegation on iOS
-    // https://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html
-    if ('ontouchstart' in document.documentElement &&
-      !makeArray(SelectorEngine.closest(parent, Selector.NAVBAR_NAV)).length) {
-      makeArray(document.body.children)
-        .forEach(elem => EventHandler.on(elem, 'mouseover', null, noop()))
-    }
-
-    this._element.focus()
-    this._element.setAttribute('aria-expanded', true)
-
-    Manipulator.toggleClass(this._menu, ClassName.SHOW)
-    Manipulator.toggleClass(parent, ClassName.SHOW)
-    EventHandler.trigger(parent, Event.SHOWN, relatedTarget)
-  }
-
-  hide() {
-    if (this._element.disabled || this._element.classList.contains(ClassName.DISABLED) || !this._menu.classList.contains(ClassName.SHOW)) {
-      return
-    }
-
-    const parent = Dropdown.getParentFromElement(this._element)
-    const relatedTarget = {
-      relatedTarget: this._element
-    }
-
-    const hideEvent = EventHandler.trigger(parent, Event.HIDE, relatedTarget)
-
-    if (hideEvent.defaultPrevented) {
-      return
-    }
-
-    if (this._popper) {
-      this._popper.destroy()
-    }
-
-    Manipulator.toggleClass(this._menu, ClassName.SHOW)
-    Manipulator.toggleClass(parent, ClassName.SHOW)
-    EventHandler.trigger(parent, Event.HIDDEN, relatedTarget)
-  }
-
-  dispose() {
-    Data.removeData(this._element, DATA_KEY)
-    EventHandler.off(this._element, EVENT_KEY)
-    this._element = null
-    this._menu = null
-    if (this._popper) {
-      this._popper.destroy()
-      this._popper = null
-    }
-  }
-
-  update() {
-    this._inNavbar = this._detectNavbar()
-    if (this._popper) {
-      this._popper.scheduleUpdate()
-    }
-  }
-
-  // Private
-
-  _addEventListeners() {
-    EventHandler.on(this._element, Event.CLICK, event => {
-      event.preventDefault()
-      event.stopPropagation()
-      this.toggle()
-    })
-  }
-
-  _getConfig(config) {
-    config = {
-      ...this.constructor.Default,
-      ...Manipulator.getDataAttributes(this._element),
-      ...config
-    }
-
-    typeCheckConfig(
-      NAME,
-      config,
-      this.constructor.DefaultType
-    )
-
-    return config
-  }
-
-  _getMenuElement() {
-    const parent = Dropdown.getParentFromElement(this._element)
-
-    return SelectorEngine.findOne(Selector.MENU, parent)
-  }
-
-  _getPlacement() {
-    const parentDropdown = this._element.parentNode
-    let placement = AttachmentMap.BOTTOM
-
-    // Handle dropup
-    if (parentDropdown.classList.contains(ClassName.DROPUP)) {
-      placement = AttachmentMap.TOP
-      if (this._menu.classList.contains(ClassName.MENURIGHT)) {
-        placement = AttachmentMap.TOPEND
-      }
-    } else if (parentDropdown.classList.contains(ClassName.DROPRIGHT)) {
-      placement = AttachmentMap.RIGHT
-    } else if (parentDropdown.classList.contains(ClassName.DROPLEFT)) {
-      placement = AttachmentMap.LEFT
-    } else if (this._menu.classList.contains(ClassName.MENURIGHT)) {
-      placement = AttachmentMap.BOTTOMEND
-    }
-
-    return placement
-  }
-
-  _detectNavbar() {
-    return Boolean(SelectorEngine.closest(this._element, '.navbar'))
-  }
-
-  _getOffset() {
-    const offset = {}
-
-    if (typeof this._config.offset === 'function') {
-      offset.fn = data => {
-        data.offsets = {
-          ...data.offsets,
-          ...this._config.offset(data.offsets, this._element) || {}
-        }
-
-        return data
-      }
-    } else {
-      offset.offset = this._config.offset
-    }
-
-    return offset
-  }
-
-  _getPopperConfig() {
-    const popperConfig = {
-      placement: this._getPlacement(),
-      modifiers: {
-        offset: this._getOffset(),
-        flip: {
-          enabled: this._config.flip
-        },
-        preventOverflow: {
-          boundariesElement: this._config.boundary
-        }
-      }
-    }
-
-    // Disable Popper.js if we have a static display
-    if (this._config.display === 'static') {
-      popperConfig.modifiers.applyStyle = {
-        enabled: false
-      }
-    }
-
-    return {
-      ...popperConfig,
-      ...this._config.popperConfig
-    }
-  }
-
-  // Static
-
-  static dropdownInterface(element, config) {
-    let data = Data.getData(element, DATA_KEY)
-    const _config = typeof config === 'object' ? config : null
-
-    if (!data) {
-      data = new Dropdown(element, _config)
-    }
-
-    if (typeof config === 'string') {
-      if (typeof data[config] === 'undefined') {
-        throw new TypeError(`No method named "${config}"`)
-      }
-
-      data[config]()
-    }
-  }
-
-  static jQueryInterface(config) {
-    return this.each(function () {
-      Dropdown.dropdownInterface(this, config)
-    })
-  }
-
-  static clearMenus(event) {
-    if (event && (event.which === RIGHT_MOUSE_BUTTON_WHICH ||
-      (event.type === 'keyup' && event.which !== TAB_KEYCODE))) {
-      return
-    }
-
-    const toggles = makeArray(SelectorEngine.find(Selector.DATA_TOGGLE))
-    for (let i = 0, len = toggles.length; i < len; i++) {
-      const parent = Dropdown.getParentFromElement(toggles[i])
-      const context = Data.getData(toggles[i], DATA_KEY)
-      const relatedTarget = {
-        relatedTarget: toggles[i]
-      }
-
-      if (event && event.type === 'click') {
-        relatedTarget.clickEvent = event
-      }
-
-      if (!context) {
-        continue
-      }
-
-      const dropdownMenu = context._menu
-      if (!parent.classList.contains(ClassName.SHOW)) {
-        continue
-      }
-
-      if (event && ((event.type === 'click' &&
-          /input|textarea/i.test(event.target.tagName)) ||
-          (event.type === 'keyup' && event.which === TAB_KEYCODE)) &&
-          parent.contains(event.target)) {
-        continue
-      }
-
-      const hideEvent = EventHandler.trigger(parent, Event.HIDE, relatedTarget)
-      if (hideEvent.defaultPrevented) {
-        continue
-      }
-
-      // If this is a touch-enabled device we remove the extra
-      // empty mouseover listeners we added for iOS support
-      if ('ontouchstart' in document.documentElement) {
-        makeArray(document.body.children)
-          .forEach(elem => EventHandler.off(elem, 'mouseover', null, noop()))
-      }
-
-      toggles[i].setAttribute('aria-expanded', 'false')
-
-      if (context._popper) {
-        context._popper.destroy()
-      }
-
-      dropdownMenu.classList.remove(ClassName.SHOW)
-      parent.classList.remove(ClassName.SHOW)
-      EventHandler.trigger(parent, Event.HIDDEN, relatedTarget)
-    }
-  }
-
-  static getParentFromElement(element) {
-    return getElementFromSelector(element) || element.parentNode
-  }
-
-  static dataApiKeydownHandler(event) {
-    // If not input/textarea:
-    //  - And not a key in REGEXP_KEYDOWN => not a dropdown command
-    // If input/textarea:
-    //  - If space key => not a dropdown command
-    //  - If key is other than escape
-    //    - If key is not up or down => not a dropdown command
-    //    - If trigger inside the menu => not a dropdown command
-    if (/input|textarea/i.test(event.target.tagName) ?
-      event.which === SPACE_KEYCODE || (event.which !== ESCAPE_KEYCODE &&
-      ((event.which !== ARROW_DOWN_KEYCODE && event.which !== ARROW_UP_KEYCODE) ||
-        SelectorEngine.closest(event.target, Selector.MENU))) :
-      !REGEXP_KEYDOWN.test(event.which)) {
-      return
-    }
-
-    event.preventDefault()
-    event.stopPropagation()
-
-    if (this.disabled || this.classList.contains(ClassName.DISABLED)) {
-      return
-    }
-
-    const parent = Dropdown.getParentFromElement(this)
-    const isActive = parent.classList.contains(ClassName.SHOW)
-
-    if (!isActive || (isActive && (event.which === ESCAPE_KEYCODE || event.which === SPACE_KEYCODE))) {
-      if (event.which === ESCAPE_KEYCODE) {
-        SelectorEngine.findOne(Selector.DATA_TOGGLE, parent).focus()
-      }
-
-      Dropdown.clearMenus()
-      return
-    }
-
-    const items = makeArray(SelectorEngine.find(Selector.VISIBLE_ITEMS, parent))
-
-    if (!items.length) {
-      return
-    }
-
-    let index = items.indexOf(event.target)
-
-    if (event.which === ARROW_UP_KEYCODE && index > 0) { // Up
-      index--
-    }
-
-    if (event.which === ARROW_DOWN_KEYCODE && index < items.length - 1) { // Down
-      index++
-    }
-
-    if (index < 0) {
-      index = 0
-    }
-
-    items[index].focus()
-  }
-
-  static getInstance(element) {
-    return Data.getData(element, DATA_KEY)
-  }
-}
-
-/**
- * ------------------------------------------------------------------------
- * Data Api implementation
- * ------------------------------------------------------------------------
- */
-
-EventHandler.on(document, Event.KEYDOWN_DATA_API, Selector.DATA_TOGGLE, Dropdown.dataApiKeydownHandler)
-EventHandler.on(document, Event.KEYDOWN_DATA_API, Selector.MENU, Dropdown.dataApiKeydownHandler)
-EventHandler.on(document, Event.CLICK_DATA_API, Dropdown.clearMenus)
-EventHandler.on(document, Event.KEYUP_DATA_API, Dropdown.clearMenus)
-EventHandler.on(document, Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
-  event.preventDefault()
-  event.stopPropagation()
-  Dropdown.dropdownInterface(this, 'toggle')
-})
-EventHandler
-  .on(document, Event.CLICK_DATA_API, Selector.FORM_CHILD, e => e.stopPropagation())
-
-const $ = getjQuery()
-
-/**
- * ------------------------------------------------------------------------
- * jQuery
- * ------------------------------------------------------------------------
- * add .dropdown to jQuery only if jQuery is present
- */
-/* istanbul ignore if */
-if ($) {
-  const JQUERY_NO_CONFLICT = $.fn[NAME]
-  $.fn[NAME] = Dropdown.jQueryInterface
-  $.fn[NAME].Constructor = Dropdown
-  $.fn[NAME].noConflict = () => {
-    $.fn[NAME] = JQUERY_NO_CONFLICT
-    return Dropdown.jQueryInterface
-  }
-}
-
-export default Dropdown
diff --git a/js/src/dropdown/dropdown.spec.js b/js/src/dropdown/dropdown.spec.js
deleted file mode 100644
index 46374453c..000000000
--- a/js/src/dropdown/dropdown.spec.js
+++ /dev/null
@@ -1,1564 +0,0 @@
-import Popper from 'popper.js'
-
-import Dropdown from './dropdown'
-import EventHandler from '../dom/event-handler'
-
-/** Test helpers */
-import { getFixture, clearFixture, createEvent, jQueryMock } from '../../tests/helpers/fixture'
-
-describe('Dropdown', () => {
-  let fixtureEl
-
-  beforeAll(() => {
-    fixtureEl = getFixture()
-  })
-
-  afterEach(() => {
-    clearFixture()
-  })
-
-  describe('VERSION', () => {
-    it('should return plugin version', () => {
-      expect(Dropdown.VERSION).toEqual(jasmine.any(String))
-    })
-  })
-
-  describe('Default', () => {
-    it('should return plugin default config', () => {
-      expect(Dropdown.Default).toEqual(jasmine.any(Object))
-    })
-  })
-
-  describe('DefaultType', () => {
-    it('should return plugin default type config', () => {
-      expect(Dropdown.DefaultType).toEqual(jasmine.any(Object))
-    })
-  })
-
-  describe('constructor', () => {
-    it('should create offset modifier correctly when offset option is a function', () => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const getOffset = offsets => offsets
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = new Dropdown(btnDropdown, {
-        offset: getOffset
-      })
-
-      const offset = dropdown._getOffset()
-
-      expect(offset.offset).toBeUndefined()
-      expect(typeof offset.fn).toEqual('function')
-    })
-
-    it('should create offset modifier correctly when offset option is not a function', () => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const myOffset = 7
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = new Dropdown(btnDropdown, {
-        offset: myOffset
-      })
-
-      const offset = dropdown._getOffset()
-
-      expect(offset.offset).toEqual(myOffset)
-      expect(offset.fn).toBeUndefined()
-    })
-
-    it('should add a listener on trigger which do not have data-toggle="dropdown"', () => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('.btn')
-      const dropdown = new Dropdown(btnDropdown)
-
-      spyOn(dropdown, 'toggle')
-
-      btnDropdown.click()
-
-      expect(dropdown.toggle).toHaveBeenCalled()
-    })
-
-    it('should allow to pass config to popper.js with `popperConfig`', () => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = new Dropdown(btnDropdown, {
-        popperConfig: {
-          placement: 'left'
-        }
-      })
-
-      const popperConfig = dropdown._getPopperConfig()
-
-      expect(popperConfig.placement).toEqual('left')
-    })
-  })
-
-  describe('toggle', () => {
-    it('should toggle a dropdown', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('show')).toEqual(true)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('true')
-        done()
-      })
-
-      dropdown.toggle()
-    })
-
-    it('should destroy old popper references on toggle', done => {
-      fixtureEl.innerHTML = [
-        '<div class="first dropdown">',
-        '  <button href="#" class="firstBtn btn" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>',
-        '<div class="second dropdown">',
-        '  <button href="#" class="secondBtn btn" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown1 = fixtureEl.querySelector('.firstBtn')
-      const btnDropdown2 = fixtureEl.querySelector('.secondBtn')
-      const firstDropdownEl = fixtureEl.querySelector('.first')
-      const secondDropdownEl = fixtureEl.querySelector('.second')
-      const dropdown1 = new Dropdown(btnDropdown1)
-      const dropdown2 = new Dropdown(btnDropdown2)
-
-      firstDropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(firstDropdownEl.classList.contains('show')).toEqual(true)
-        spyOn(dropdown1._popper, 'destroy')
-        dropdown2.toggle()
-      })
-
-      secondDropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdown1._popper.destroy).toHaveBeenCalled()
-        done()
-      })
-
-      dropdown1.toggle()
-    })
-
-    it('should toggle a dropdown and add/remove event listener on mobile', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const defaultValueOnTouchStart = document.documentElement.ontouchstart
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      document.documentElement.ontouchstart = () => {}
-      spyOn(EventHandler, 'on')
-      spyOn(EventHandler, 'off')
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('show')).toEqual(true)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('true')
-        expect(EventHandler.on).toHaveBeenCalled()
-
-        dropdown.toggle()
-      })
-
-      dropdownEl.addEventListener('hidden.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('show')).toEqual(false)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('false')
-        expect(EventHandler.off).toHaveBeenCalled()
-
-        document.documentElement.ontouchstart = defaultValueOnTouchStart
-        done()
-      })
-
-      dropdown.toggle()
-    })
-
-    it('should toggle a dropdown at the right', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu dropdown-menu-right">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('show')).toEqual(true)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('true')
-        done()
-      })
-
-      dropdown.toggle()
-    })
-
-    it('should toggle a dropup', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropup">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropupEl = fixtureEl.querySelector('.dropup')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropupEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropupEl.classList.contains('show')).toEqual(true)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('true')
-        done()
-      })
-
-      dropdown.toggle()
-    })
-
-    it('should toggle a dropup at the right', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropup">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu dropdown-menu-right">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropupEl = fixtureEl.querySelector('.dropup')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropupEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropupEl.classList.contains('show')).toEqual(true)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('true')
-        done()
-      })
-
-      dropdown.toggle()
-    })
-
-    it('should toggle a dropright', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropright">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const droprightEl = fixtureEl.querySelector('.dropright')
-      const dropdown = new Dropdown(btnDropdown)
-
-      droprightEl.addEventListener('shown.bs.dropdown', () => {
-        expect(droprightEl.classList.contains('show')).toEqual(true)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('true')
-        done()
-      })
-
-      dropdown.toggle()
-    })
-
-    it('should toggle a dropleft', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropleft">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropleftEl = fixtureEl.querySelector('.dropleft')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropleftEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropleftEl.classList.contains('show')).toEqual(true)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('true')
-        done()
-      })
-
-      dropdown.toggle()
-    })
-
-    it('should toggle a dropdown with parent reference', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown, {
-        reference: 'parent'
-      })
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('show')).toEqual(true)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('true')
-        done()
-      })
-
-      dropdown.toggle()
-    })
-
-    it('should toggle a dropdown with a dom node reference', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown, {
-        reference: fixtureEl
-      })
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('show')).toEqual(true)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('true')
-        done()
-      })
-
-      dropdown.toggle()
-    })
-
-    it('should toggle a dropdown with a jquery object reference', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown, {
-        reference: { 0: fixtureEl, jquery: 'jQuery' }
-      })
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('show')).toEqual(true)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('true')
-        done()
-      })
-
-      dropdown.toggle()
-    })
-
-    it('should not toggle a dropdown if the element is disabled', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button disabled href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        throw new Error('should not throw shown.bs.dropdown event')
-      })
-
-      dropdown.toggle()
-
-      setTimeout(() => {
-        expect().nothing()
-        done()
-      })
-    })
-
-    it('should not toggle a dropdown if the element contains .disabled', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle disabled" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        throw new Error('should not throw shown.bs.dropdown event')
-      })
-
-      dropdown.toggle()
-
-      setTimeout(() => {
-        expect().nothing()
-        done()
-      })
-    })
-
-    it('should not toggle a dropdown if the menu is shown', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu show">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        throw new Error('should not throw shown.bs.dropdown event')
-      })
-
-      dropdown.toggle()
-
-      setTimeout(() => {
-        expect().nothing()
-        done()
-      })
-    })
-
-    it('should not toggle a dropdown if show event is prevented', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('show.bs.dropdown', e => {
-        e.preventDefault()
-      })
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        throw new Error('should not throw shown.bs.dropdown event')
-      })
-
-      dropdown.toggle()
-
-      setTimeout(() => {
-        expect().nothing()
-        done()
-      })
-    })
-  })
-
-  describe('show', () => {
-    it('should show a dropdown', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('show')).toEqual(true)
-        done()
-      })
-
-      dropdown.show()
-    })
-
-    it('should not show a dropdown if the element is disabled', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button disabled href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        throw new Error('should not throw shown.bs.dropdown event')
-      })
-
-      dropdown.show()
-
-      setTimeout(() => {
-        expect().nothing()
-        done()
-      }, 10)
-    })
-
-    it('should not show a dropdown if the element contains .disabled', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle disabled" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        throw new Error('should not throw shown.bs.dropdown event')
-      })
-
-      dropdown.show()
-
-      setTimeout(() => {
-        expect().nothing()
-        done()
-      }, 10)
-    })
-
-    it('should not show a dropdown if the menu is shown', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu show">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        throw new Error('should not throw shown.bs.dropdown event')
-      })
-
-      dropdown.show()
-
-      setTimeout(() => {
-        expect().nothing()
-        done()
-      }, 10)
-    })
-
-    it('should not show a dropdown if show event is prevented', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('show.bs.dropdown', e => {
-        e.preventDefault()
-      })
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        throw new Error('should not throw shown.bs.dropdown event')
-      })
-
-      dropdown.show()
-
-      setTimeout(() => {
-        expect().nothing()
-        done()
-      }, 10)
-    })
-  })
-
-  describe('hide', () => {
-    it('should hide a dropdown', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu show">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdownMenu = fixtureEl.querySelector('.dropdown-menu')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('hidden.bs.dropdown', () => {
-        expect(dropdownMenu.classList.contains('show')).toEqual(false)
-        done()
-      })
-
-      dropdown.hide()
-    })
-
-    it('should hide a dropdown and destroy popper', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        spyOn(dropdown._popper, 'destroy')
-        dropdown.hide()
-      })
-
-      dropdownEl.addEventListener('hidden.bs.dropdown', () => {
-        expect(dropdown._popper.destroy).toHaveBeenCalled()
-        done()
-      })
-
-      dropdown.show()
-    })
-
-    it('should not hide a dropdown if the element is disabled', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button disabled href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu show">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdownMenu = fixtureEl.querySelector('.dropdown-menu')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('hidden.bs.dropdown', () => {
-        throw new Error('should not throw hidden.bs.dropdown event')
-      })
-
-      dropdown.hide()
-
-      setTimeout(() => {
-        expect(dropdownMenu.classList.contains('show')).toEqual(true)
-        done()
-      }, 10)
-    })
-
-    it('should not hide a dropdown if the element contains .disabled', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle disabled" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu show">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdownMenu = fixtureEl.querySelector('.dropdown-menu')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('hidden.bs.dropdown', () => {
-        throw new Error('should not throw hidden.bs.dropdown event')
-      })
-
-      dropdown.hide()
-
-      setTimeout(() => {
-        expect(dropdownMenu.classList.contains('show')).toEqual(true)
-        done()
-      }, 10)
-    })
-
-    it('should not hide a dropdown if the menu is not shown', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('hidden.bs.dropdown', () => {
-        throw new Error('should not throw hidden.bs.dropdown event')
-      })
-
-      dropdown.hide()
-
-      setTimeout(() => {
-        expect().nothing()
-        done()
-      }, 10)
-    })
-
-    it('should not hide a dropdown if hide event is prevented', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu show">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdownMenu = fixtureEl.querySelector('.dropdown-menu')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdownEl.addEventListener('hide.bs.dropdown', e => {
-        e.preventDefault()
-      })
-
-      dropdownEl.addEventListener('hidden.bs.dropdown', () => {
-        throw new Error('should not throw hidden.bs.dropdown event')
-      })
-
-      dropdown.hide()
-
-      setTimeout(() => {
-        expect(dropdownMenu.classList.contains('show')).toEqual(true)
-        done()
-      })
-    })
-  })
-
-  describe('dispose', () => {
-    it('should dispose dropdown', () => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = new Dropdown(btnDropdown)
-
-      expect(dropdown._popper).toBeNull()
-      expect(dropdown._menu).toBeDefined()
-      expect(dropdown._element).toBeDefined()
-
-      dropdown.dispose()
-
-      expect(dropdown._menu).toBeNull()
-      expect(dropdown._element).toBeNull()
-    })
-
-    it('should dispose dropdown with popper.js', () => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdown.toggle()
-
-      expect(dropdown._popper).toBeDefined()
-      expect(dropdown._menu).toBeDefined()
-      expect(dropdown._element).toBeDefined()
-
-      spyOn(Popper.prototype, 'destroy')
-
-      dropdown.dispose()
-
-      expect(dropdown._popper).toBeNull()
-      expect(dropdown._menu).toBeNull()
-      expect(dropdown._element).toBeNull()
-      expect(Popper.prototype.destroy).toHaveBeenCalled()
-    })
-  })
-
-  describe('update', () => {
-    it('should call popper.js and detect navbar on update', () => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = new Dropdown(btnDropdown)
-
-      dropdown.toggle()
-
-      expect(dropdown._popper).toBeDefined()
-
-      spyOn(dropdown._popper, 'scheduleUpdate')
-      spyOn(dropdown, '_detectNavbar')
-
-      dropdown.update()
-
-      expect(dropdown._popper.scheduleUpdate).toHaveBeenCalled()
-      expect(dropdown._detectNavbar).toHaveBeenCalled()
-    })
-
-    it('should just detect navbar on update', () => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = new Dropdown(btnDropdown)
-
-      spyOn(dropdown, '_detectNavbar')
-
-      dropdown.update()
-
-      expect(dropdown._popper).toBeNull()
-      expect(dropdown._detectNavbar).toHaveBeenCalled()
-    })
-  })
-
-  describe('data-api', () => {
-    it('should not add class position-static to dropdown if boundary not set', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('position-static')).toEqual(false)
-        done()
-      })
-
-      btnDropdown.click()
-    })
-
-    it('should add class position-static to dropdown if boundary not scrollParent', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" data-boundary="viewport">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('position-static')).toEqual(true)
-        done()
-      })
-
-      btnDropdown.click()
-    })
-
-    it('should show and hide a dropdown', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      let showEventTriggered = false
-      let hideEventTriggered = false
-
-      dropdownEl.addEventListener('show.bs.dropdown', () => {
-        showEventTriggered = true
-      })
-
-      dropdownEl.addEventListener('shown.bs.dropdown', e => {
-        expect(dropdownEl.classList.contains('show')).toEqual(true)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('true')
-        expect(showEventTriggered).toEqual(true)
-        expect(e.relatedTarget).toEqual(btnDropdown)
-        document.body.click()
-      })
-
-      dropdownEl.addEventListener('hide.bs.dropdown', () => {
-        hideEventTriggered = true
-      })
-
-      dropdownEl.addEventListener('hidden.bs.dropdown', e => {
-        expect(dropdownEl.classList.contains('show')).toEqual(false)
-        expect(btnDropdown.getAttribute('aria-expanded')).toEqual('false')
-        expect(hideEventTriggered).toEqual(true)
-        expect(e.relatedTarget).toEqual(btnDropdown)
-        done()
-      })
-
-      btnDropdown.click()
-    })
-
-    it('should not use popper.js in navbar', done => {
-      fixtureEl.innerHTML = [
-        '<nav class="navbar navbar-expand-md navbar-light bg-light">',
-        '  <div class="dropdown">',
-        '    <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" aria-expanded="false">Dropdown</button>',
-        '    <div class="dropdown-menu">',
-        '      <a class="dropdown-item" href="#">Secondary link</a>',
-        '    </div>',
-        '  </div>',
-        '</nav>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdownMenu = fixtureEl.querySelector('.dropdown-menu')
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownMenu.getAttribute('style')).toEqual(null, 'no inline style applied by popper.js')
-        done()
-      })
-
-      btnDropdown.click()
-    })
-
-    it('should not use popper.js if display set to static', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown" data-display="static">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-      const dropdownMenu = fixtureEl.querySelector('.dropdown-menu')
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        // popper.js add this attribute when we use it
-        expect(dropdownMenu.getAttribute('x-placement')).toEqual(null)
-        done()
-      })
-
-      btnDropdown.click()
-    })
-
-    it('should remove "show" class if tabbing outside of menu', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Secondary link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const btnDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdownEl = fixtureEl.querySelector('.dropdown')
-
-      dropdownEl.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('show')).toEqual(true)
-
-        const keyUp = createEvent('keyup')
-
-        keyUp.which = 9 // Tab
-        document.dispatchEvent(keyUp)
-      })
-
-      dropdownEl.addEventListener('hidden.bs.dropdown', () => {
-        expect(dropdownEl.classList.contains('show')).toEqual(false)
-        done()
-      })
-
-      btnDropdown.click()
-    })
-
-    it('should remove "show" class if body is clicked, with multiple dropdowns', done => {
-      fixtureEl.innerHTML = [
-        '<div class="nav">',
-        '  <div class="dropdown" id="testmenu">',
-        '    <a class="dropdown-toggle" data-toggle="dropdown" href="#testmenu">Test menu <span class="caret"/></a>',
-        '    <div class="dropdown-menu">',
-        '      <a class="dropdown-item" href="#sub1">Submenu 1</a>',
-        '    </div>',
-        '  </div>',
-        '</div>',
-        '<div class="btn-group">',
-        '  <button class="btn">Actions</button>',
-        '  <button class="btn dropdown-toggle" data-toggle="dropdown"></button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Action 1</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const triggerDropdownList = fixtureEl.querySelectorAll('[data-toggle="dropdown"]')
-
-      expect(triggerDropdownList.length).toEqual(2)
-
-      const first = triggerDropdownList[0]
-      const last = triggerDropdownList[1]
-      const dropdownTestMenu = first.parentNode
-      const btnGroup = last.parentNode
-
-      dropdownTestMenu.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownTestMenu.classList.contains('show')).toEqual(true)
-        expect(fixtureEl.querySelectorAll('.dropdown-menu.show').length).toEqual(1)
-        document.body.click()
-      })
-
-      dropdownTestMenu.addEventListener('hidden.bs.dropdown', () => {
-        expect(fixtureEl.querySelectorAll('.dropdown-menu.show').length).toEqual(0)
-        last.click()
-      })
-
-      btnGroup.addEventListener('shown.bs.dropdown', () => {
-        expect(btnGroup.classList.contains('show')).toEqual(true)
-        expect(fixtureEl.querySelectorAll('.dropdown-menu.show').length).toEqual(1)
-        document.body.click()
-      })
-
-      btnGroup.addEventListener('hidden.bs.dropdown', () => {
-        expect(fixtureEl.querySelectorAll('.dropdown-menu.show').length).toEqual(0)
-        done()
-      })
-
-      first.click()
-    })
-
-    it('should remove "show" class if body if tabbing outside of menu, with multiple dropdowns', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <a class="dropdown-toggle" data-toggle="dropdown" href="#testmenu">Test menu</a>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#sub1">Submenu 1</a>',
-        '  </div>',
-        '</div>',
-        '<div class="btn-group">',
-        '  <button class="btn">Actions</button>',
-        '  <button class="btn dropdown-toggle" data-toggle="dropdown"></button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#">Action 1</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const triggerDropdownList = fixtureEl.querySelectorAll('[data-toggle="dropdown"]')
-
-      expect(triggerDropdownList.length).toEqual(2)
-
-      const first = triggerDropdownList[0]
-      const last = triggerDropdownList[1]
-      const dropdownTestMenu = first.parentNode
-      const btnGroup = last.parentNode
-
-      dropdownTestMenu.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdownTestMenu.classList.contains('show')).toEqual(true, '"show" class added on click')
-        expect(fixtureEl.querySelectorAll('.dropdown-menu.show').length).toEqual(1, 'only one dropdown is shown')
-
-        const keyUp = createEvent('keyup')
-        keyUp.which = 9 // Tab
-
-        document.dispatchEvent(keyUp)
-      })
-
-      dropdownTestMenu.addEventListener('hidden.bs.dropdown', () => {
-        expect(fixtureEl.querySelectorAll('.dropdown-menu.show').length).toEqual(0, '"show" class removed')
-        last.click()
-      })
-
-      btnGroup.addEventListener('shown.bs.dropdown', () => {
-        expect(btnGroup.classList.contains('show')).toEqual(true, '"show" class added on click')
-        expect(fixtureEl.querySelectorAll('.dropdown-menu.show').length).toEqual(1, 'only one dropdown is shown')
-
-        const keyUp = createEvent('keyup')
-        keyUp.which = 9 // Tab
-
-        document.dispatchEvent(keyUp)
-      })
-
-      btnGroup.addEventListener('hidden.bs.dropdown', () => {
-        expect(fixtureEl.querySelectorAll('.dropdown-menu.show').length).toEqual(0, '"show" class removed')
-        done()
-      })
-
-      first.click()
-    })
-
-    it('should fire hide and hidden event without a clickEvent if event type is not click', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#sub1">Submenu 1</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const triggerDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = fixtureEl.querySelector('.dropdown')
-
-      dropdown.addEventListener('hide.bs.dropdown', e => {
-        expect(e.clickEvent).toBeUndefined()
-      })
-
-      dropdown.addEventListener('hidden.bs.dropdown', e => {
-        expect(e.clickEvent).toBeUndefined()
-        done()
-      })
-
-      dropdown.addEventListener('shown.bs.dropdown', () => {
-        const keyDown = createEvent('keydown')
-
-        keyDown.which = 27
-        triggerDropdown.dispatchEvent(keyDown)
-      })
-
-      triggerDropdown.click()
-    })
-
-    it('should ignore keyboard events within <input>s and <textarea>s', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#sub1">Submenu 1</a>',
-        '    <input type="text" />',
-        '    <textarea></textarea>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const triggerDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = fixtureEl.querySelector('.dropdown')
-      const input = fixtureEl.querySelector('input')
-      const textarea = fixtureEl.querySelector('textarea')
-
-      dropdown.addEventListener('shown.bs.dropdown', () => {
-        input.focus()
-        const keyDown = createEvent('keydown')
-
-        keyDown.which = 38
-        input.dispatchEvent(keyDown)
-
-        expect(document.activeElement).toEqual(input, 'input still focused')
-
-        textarea.focus()
-        textarea.dispatchEvent(keyDown)
-
-        expect(document.activeElement).toEqual(textarea, 'textarea still focused')
-        done()
-      })
-
-      triggerDropdown.click()
-    })
-
-    it('should skip disabled element when using keyboard navigation', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item disabled" href="#sub1">Submenu 1</a>',
-        '    <button class="dropdown-item" type="button" disabled>Disabled button</button>',
-        '    <a id="item1" class="dropdown-item" href="#">Another link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const triggerDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = fixtureEl.querySelector('.dropdown')
-
-      dropdown.addEventListener('shown.bs.dropdown', () => {
-        const keyDown = createEvent('keydown')
-        keyDown.which = 40
-
-        triggerDropdown.dispatchEvent(keyDown)
-        triggerDropdown.dispatchEvent(keyDown)
-
-        expect(document.activeElement.classList.contains('disabled')).toEqual(false, '.disabled not focused')
-        expect(document.activeElement.hasAttribute('disabled')).toEqual(false, ':disabled not focused')
-        done()
-      })
-
-      triggerDropdown.click()
-    })
-
-    it('should focus next/previous element when using keyboard navigation', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a id="item1" class="dropdown-item" href="#">A link</a>',
-        '    <a id="item2" class="dropdown-item" href="#">Another link</a>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const triggerDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = fixtureEl.querySelector('.dropdown')
-      const item1 = fixtureEl.querySelector('#item1')
-      const item2 = fixtureEl.querySelector('#item2')
-
-      dropdown.addEventListener('shown.bs.dropdown', () => {
-        const keyDown40 = createEvent('keydown')
-        keyDown40.which = 40
-
-        triggerDropdown.dispatchEvent(keyDown40)
-        expect(document.activeElement).toEqual(item1, 'item1 is focused')
-
-        document.activeElement.dispatchEvent(keyDown40)
-        expect(document.activeElement).toEqual(item2, 'item2 is focused')
-
-        const keyDown38 = createEvent('keydown')
-        keyDown38.which = 38
-
-        document.activeElement.dispatchEvent(keyDown38)
-        expect(document.activeElement).toEqual(item1, 'item1 is focused')
-
-        done()
-      })
-
-      triggerDropdown.click()
-    })
-
-    it('should not close the dropdown if the user clicks on a text field', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <input type="text" />',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const triggerDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = fixtureEl.querySelector('.dropdown')
-      const input = fixtureEl.querySelector('input')
-
-      input.addEventListener('click', () => {
-        expect(dropdown.classList.contains('show')).toEqual(true, 'dropdown menu is shown')
-        done()
-      })
-
-      dropdown.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdown.classList.contains('show')).toEqual(true, 'dropdown menu is shown')
-        input.dispatchEvent(createEvent('click'))
-      })
-
-      triggerDropdown.click()
-    })
-
-    it('should not close the dropdown if the user clicks on a textarea', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <textarea></textarea>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const triggerDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = fixtureEl.querySelector('.dropdown')
-      const textarea = fixtureEl.querySelector('textarea')
-
-      textarea.addEventListener('click', () => {
-        expect(dropdown.classList.contains('show')).toEqual(true, 'dropdown menu is shown')
-        done()
-      })
-
-      dropdown.addEventListener('shown.bs.dropdown', () => {
-        expect(dropdown.classList.contains('show')).toEqual(true, 'dropdown menu is shown')
-        textarea.dispatchEvent(createEvent('click'))
-      })
-
-      triggerDropdown.click()
-    })
-
-    it('should ignore keyboard events for <input>s and <textarea>s within dropdown-menu, except for escape key', done => {
-      fixtureEl.innerHTML = [
-        '<div class="dropdown">',
-        '  <button href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '  <div class="dropdown-menu">',
-        '    <a class="dropdown-item" href="#sub1">Submenu 1</a>',
-        '    <input type="text" />',
-        '    <textarea></textarea>',
-        '  </div>',
-        '</div>'
-      ].join('')
-
-      const triggerDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = fixtureEl.querySelector('.dropdown')
-      const input = fixtureEl.querySelector('input')
-      const textarea = fixtureEl.querySelector('textarea')
-
-      // Space key
-      const keyDownSpace = createEvent('keydown')
-      keyDownSpace.which = 32
-
-      // Key up
-      const keyDownUp = createEvent('keydown')
-      keyDownSpace.which = 38
-
-      // Key down
-      const keyDown = createEvent('keydown')
-      keyDownSpace.which = 40
-
-      // Key escape
-      const keyDownEscape = createEvent('keydown')
-      keyDownEscape.which = 27
-
-      dropdown.addEventListener('shown.bs.dropdown', () => {
-        // Space key
-        input.focus()
-        input.dispatchEvent(keyDownSpace)
-
-        expect(document.activeElement).toEqual(input, 'input still focused')
-
-        textarea.focus()
-        textarea.dispatchEvent(keyDownSpace)
-
-        expect(document.activeElement).toEqual(textarea, 'textarea still focused')
-
-        // Key up
-        input.focus()
-        input.dispatchEvent(keyDownUp)
-
-        expect(document.activeElement).toEqual(input, 'input still focused')
-
-        textarea.focus()
-        textarea.dispatchEvent(keyDownUp)
-
-        expect(document.activeElement).toEqual(textarea, 'textarea still focused')
-
-        // Key down
-        input.focus()
-        input.dispatchEvent(keyDown)
-
-        expect(document.activeElement).toEqual(input, 'input still focused')
-
-        textarea.focus()
-        textarea.dispatchEvent(keyDown)
-
-        expect(document.activeElement).toEqual(textarea, 'textarea still focused')
-
-        // Key escape
-        input.focus()
-        input.dispatchEvent(keyDownEscape)
-
-        expect(dropdown.classList.contains('show')).toEqual(false, 'dropdown menu is not shown')
-        done()
-      })
-
-      triggerDropdown.click()
-    })
-
-    it('should not open dropdown if escape key was pressed on the toggle', done => {
-      fixtureEl.innerHTML = [
-        '<div class="tabs">',
-        '  <div class="dropdown">',
-        '    <button disabled href="#" class="btn dropdown-toggle" data-toggle="dropdown">Dropdown</button>',
-        '    <div class="dropdown-menu">',
-        '      <a class="dropdown-item" href="#">Secondary link</a>',
-        '      <a class="dropdown-item" href="#">Something else here</a>',
-        '      <div class="divider"/>',
-        '     <a class="dropdown-item" href="#">Another link</a>',
-        '   </div>',
-        '  </div>',
-        '</div>'
-      ]
-
-      const triggerDropdown = fixtureEl.querySelector('[data-toggle="dropdown"]')
-      const dropdown = new Dropdown(triggerDropdown)
-      const button = fixtureEl.querySelector('button[data-toggle="dropdown"]')
-
-      spyOn(dropdown, 'toggle')
-
-      // Key escape
-      button.focus()
-      // Key escape
-      const keyDownEscape = createEvent('keydown')
-      keyDownEscape.which = 27
-      button.dispatchEvent(keyDownEscape)
-
-      setTimeout(() => {
-        expect(dropdown.toggle).not.toHaveBeenCalled()
-        expect(triggerDropdown.parentNode.classList.contains('show')).toEqual(false)
-        done()
-      }, 20)
-    })
-  })
-
-  describe('jQueryInterface', () => {
-    it('should create a dropdown', () => {
-      fixtureEl.innerHTML = '<div></div>'
-
-      const div = fixtureEl.querySelector('div')
-
-      jQueryMock.fn.dropdown = Dropdown.jQueryInterface
-      jQueryMock.elements = [div]
-
-      jQueryMock.fn.dropdown.call(jQueryMock)
-
-      expect(Dropdown.getInstance(div)).toBeDefined()
-    })
-
-    it('should not re create a dropdown', () => {
-      fixtureEl.innerHTML = '<div></div>'
-
-      const div = fixtureEl.querySelector('div')
-      const dropdown = new Dropdown(div)
-
-      jQueryMock.fn.dropdown = Dropdown.jQueryInterface
-      jQueryMock.elements = [div]
-
-      jQueryMock.fn.dropdown.call(jQueryMock)
-
-      expect(Dropdown.getInstance(div)).toEqual(dropdown)
-    })
-
-    it('should throw error on undefined method', () => {
-      fixtureEl.innerHTML = '<div></div>'
-
-      const div = fixtureEl.querySelector('div')
-      const action = 'undefinedMethod'
-
-      jQueryMock.fn.dropdown = Dropdown.jQueryInterface
-      jQueryMock.elements = [div]
-
-      try {
-        jQueryMock.fn.dropdown.call(jQueryMock, action)
-      } catch (error) {
-        expect(error.message).toEqual(`No method named "${action}"`)
-      }
-    })
-  })
-
-  describe('getInstance', () => {
-    it('should return dropdown instance', () => {
-      fixtureEl.innerHTML = '<div></div>'
-
-      const div = fixtureEl.querySelector('div')
-      const dropdown = new Dropdown(div)
-
-      expect(Dropdown.getInstance(div)).toEqual(dropdown)
-    })
-
-    it('should return null when there is no dropdown instance', () => {
-      fixtureEl.innerHTML = '<div></div>'
-
-      const div = fixtureEl.querySelector('div')
-
-      expect(Dropdown.getInstance(div)).toEqual(null)
-    })
-  })
-})