text: import Collapse from '../../src/collapse'
  import EventHandler from '../../src/dom/event-handler'
  
  /** Test helpers */
  import { getFixture, clearFixture, jQueryMock } from '../helpers/fixture'
  
  describe('Collapse', () => {
    let fixtureEl
  
    beforeAll(() => {
      fixtureEl = getFixture()
    })
  
    afterEach(() => {
      clearFixture()
    })
  
    describe('VERSION', () => {
      it('should return plugin version', () => {
        expect(Collapse.VERSION).toEqual(jasmine.any(String))
      })
    })
  
    describe('Default', () => {
      it('should return plugin default config', () => {
        expect(Collapse.Default).toEqual(jasmine.any(Object))
      })
    })
  
    describe('DATA_KEY', () => {
      it('should return plugin data key', () => {
        expect(Collapse.DATA_KEY).toEqual('coreui.collapse')
      })
    })
  
    describe('constructor', () => {
      it('should take care of element either passed as a CSS selector or DOM element', () => {
        fixtureEl.innerHTML = '<div class="my-collapse"></div>'
  
        const collapseEl = fixtureEl.querySelector('div.my-collapse')
        const collapseBySelector = new Collapse('div.my-collapse')
        const collapseByElement = new Collapse(collapseEl)
  
        expect(collapseBySelector._element).toEqual(collapseEl)
        expect(collapseByElement._element).toEqual(collapseEl)
      })
  
      it('should allow jquery object in parent config', () => {
        fixtureEl.innerHTML = [
          '<div class="my-collapse">',
          '  <div class="item">',
          '    <a data-coreui-toggle="collapse" href="#">Toggle item</a>',
          '    <div class="collapse">Lorem ipsum</div>',
          '  </div>',
          '</div>'
        ].join('')
  
        const collapseEl = fixtureEl.querySelector('div.collapse')
        const myCollapseEl = fixtureEl.querySelector('.my-collapse')
        const fakejQueryObject = {
          0: myCollapseEl
        }
        const collapse = new Collapse(collapseEl, {
          parent: fakejQueryObject
        })
  
        expect(collapse._config.parent).toEqual(fakejQueryObject)
        expect(collapse._getParent()).toEqual(myCollapseEl)
      })
  
      it('should allow non jquery object in parent config', () => {
        fixtureEl.innerHTML = [
          '<div class="my-collapse">',
          '  <div class="item">',
          '    <a data-coreui-toggle="collapse" href="#">Toggle item</a>',
          '    <div class="collapse">Lorem ipsum</div>',
          '  </div>',
          '</div>'
        ].join('')
  
        const collapseEl = fixtureEl.querySelector('div.collapse')
        const myCollapseEl = fixtureEl.querySelector('.my-collapse')
        const collapse = new Collapse(collapseEl, {
          parent: myCollapseEl
        })
  
        expect(collapse._config.parent).toEqual(myCollapseEl)
      })
  
      it('should allow string selector in parent config', () => {
        fixtureEl.innerHTML = [
          '<div class="my-collapse">',
          '  <div class="item">',
          '    <a data-coreui-toggle="collapse" href="#">Toggle item</a>',
          '    <div class="collapse">Lorem ipsum</div>',
          '  </div>',
          '</div>'
        ].join('')
  
        const collapseEl = fixtureEl.querySelector('div.collapse')
        const myCollapseEl = fixtureEl.querySelector('.my-collapse')
        const collapse = new Collapse(collapseEl, {
          parent: 'div.my-collapse'
        })
  
        expect(collapse._config.parent).toEqual('div.my-collapse')
        expect(collapse._getParent()).toEqual(myCollapseEl)
      })
    })
  
    describe('toggle', () => {
      it('should call show method if show class is not present', () => {
        fixtureEl.innerHTML = '<div></div>'
  
        const collapseEl = fixtureEl.querySelector('div')
        const collapse = new Collapse(collapseEl)
  
        spyOn(collapse, 'show')
  
        collapse.toggle()
  
        expect(collapse.show).toHaveBeenCalled()
      })
  
      it('should call hide method if show class is present', () => {
        fixtureEl.innerHTML = '<div class="show"></div>'
  
        const collapseEl = fixtureEl.querySelector('.show')
        const collapse = new Collapse(collapseEl, {
          toggle: false
        })
  
        spyOn(collapse, 'hide')
  
        collapse.toggle()
  
        expect(collapse.hide).toHaveBeenCalled()
      })
  
      it('should find collapse children if they have collapse class too not only data-coreui-parent', done => {
        fixtureEl.innerHTML = [
          '<div class="my-collapse">',
          '  <div class="item">',
          '    <a data-coreui-toggle="collapse" href="#">Toggle item 1</a>',
          '    <div id="collapse1" class="collapse show">Lorem ipsum 1</div>',
          '  </div>',
          '  <div class="item">',
          '    <a id="triggerCollapse2" data-coreui-toggle="collapse" href="#">Toggle item 2</a>',
          '    <div id="collapse2" class="collapse">Lorem ipsum 2</div>',
          '  </div>',
          '</div>'
        ].join('')
  
        const parent = fixtureEl.querySelector('.my-collapse')
        const collapseEl1 = fixtureEl.querySelector('#collapse1')
        const collapseEl2 = fixtureEl.querySelector('#collapse2')
  
        const collapseList = [].concat(...fixtureEl.querySelectorAll('.collapse'))
          .map(el => new Collapse(el, {
            parent,
            toggle: false
          }))
  
        collapseEl2.addEventListener('shown.coreui.collapse', () => {
          expect(collapseEl2.classList.contains('show')).toEqual(true)
          expect(collapseEl1.classList.contains('show')).toEqual(false)
          done()
        })
  
        collapseList[1].toggle()
      })
    })
  
    describe('show', () => {
      it('should do nothing if is transitioning', () => {
        fixtureEl.innerHTML = '<div></div>'
  
        spyOn(EventHandler, 'trigger')
  
        const collapseEl = fixtureEl.querySelector('div')
        const collapse = new Collapse(collapseEl, {
          toggle: false
        })
  
        collapse._isTransitioning = true
        collapse.show()
  
        expect(EventHandler.trigger).not.toHaveBeenCalled()
      })
  
      it('should do nothing if already shown', () => {
        fixtureEl.innerHTML = '<div class="show"></div>'
  
        spyOn(EventHandler, 'trigger')
  
        const collapseEl = fixtureEl.querySelector('div')
        const collapse = new Collapse(collapseEl, {
          toggle: false
        })
  
        collapse.show()
  
        expect(EventHandler.trigger).not.toHaveBeenCalled()
      })
  
      it('should show a collapsed element', done => {
        fixtureEl.innerHTML = '<div class="collapse" style="height: 0px;"></div>'
  
        const collapseEl = fixtureEl.querySelector('div')
        const collapse = new Collapse(collapseEl, {
          toggle: false
        })
  
        collapseEl.addEventListener('show.coreui.collapse', () => {
          expect(collapseEl.style.height).toEqual('0px')
        })
        collapseEl.addEventListener('shown.coreui.collapse', () => {
          expect(collapseEl.classList.contains('show')).toEqual(true)
          expect(collapseEl.style.height).toEqual('')
          done()
        })
  
        collapse.show()
      })
  
      it('should show a collapsed element on width', done => {
        fixtureEl.innerHTML = '<div class="collapse width" style="width: 0px;"></div>'
  
        const collapseEl = fixtureEl.querySelector('div')
        const collapse = new Collapse(collapseEl, {
          toggle: false
        })
  
        collapseEl.addEventListener('show.coreui.collapse', () => {
          expect(collapseEl.style.width).toEqual('0px')
        })
        collapseEl.addEventListener('shown.coreui.collapse', () => {
          expect(collapseEl.classList.contains('show')).toEqual(true)
          expect(collapseEl.style.width).toEqual('')
          done()
        })
  
        collapse.show()
      })
  
      it('should collapse only the first collapse', done => {
        fixtureEl.innerHTML = [
          '<div class="card" id="accordion1">',
          '  <div id="collapse1" class="collapse"></div>',
          '</div>',
          '<div class="card" id="accordion2">',
          '  <div id="collapse2" class="collapse show"></div>',
          '</div>'
        ].join('')
  
        const el1 = fixtureEl.querySelector('#collapse1')
        const el2 = fixtureEl.querySelector('#collapse2')
        const collapse = new Collapse(el1, {
          toggle: false
        })
  
        el1.addEventListener('shown.coreui.collapse', () => {
          expect(el1.classList.contains('show')).toEqual(true)
          expect(el2.classList.contains('show')).toEqual(true)
          done()
        })
  
        collapse.show()
      })
  
      it('should not fire shown when show is prevented', done => {
        fixtureEl.innerHTML = '<div class="collapse"></div>'
  
        const collapseEl = fixtureEl.querySelector('div')
        const collapse = new Collapse(collapseEl, {
          toggle: false
        })
  
        const expectEnd = () => {
          setTimeout(() => {
            expect().nothing()
            done()
          }, 10)
        }
  
        collapseEl.addEventListener('show.coreui.collapse', e => {
          e.preventDefault()
          expectEnd()
        })
  
        collapseEl.addEventListener('shown.coreui.collapse', () => {
          throw new Error('should not fire shown event')
        })
  
        collapse.show()
      })
    })
  
    describe('hide', () => {
      it('should do nothing if is transitioning', () => {
        fixtureEl.innerHTML = '<div></div>'
  
        spyOn(EventHandler, 'trigger')
  
        const collapseEl = fixtureEl.querySelector('div')
        const collapse = new Collapse(collapseEl, {
          toggle: false
        })
  
        collapse._isTransitioning = true
        collapse.hide()
  
        expect(EventHandler.trigger).not.toHaveBeenCalled()
      })
  
      it('should do nothing if already shown', () => {
        fixtureEl.innerHTML = '<div></div>'
  
        spyOn(EventHandler, 'trigger')
  
        const collapseEl = fixtureEl.querySelector('div')
        const collapse = new Collapse(collapseEl, {
          toggle: false
        })
  
        collapse.hide()
  
        expect(EventHandler.trigger).not.toHaveBeenCalled()
      })
  
      it('should hide a collapsed element', done => {
        fixtureEl.innerHTML = '<div class="collapse show"></div>'
  
        const collapseEl = fixtureEl.querySelector('div')
        const collapse = new Collapse(collapseEl, {
          toggle: false
        })
  
        collapseEl.addEventListener('hidden.coreui.collapse', () => {
          expect(collapseEl.classList.contains('show')).toEqual(false)
          expect(collapseEl.style.height).toEqual('')
          done()
        })
  
        collapse.hide()
      })
  
      it('should not fire hidden when hide is prevented', done => {
        fixtureEl.innerHTML = '<div class="collapse show"></div>'
  
        const collapseEl = fixtureEl.querySelector('div')
        const collapse = new Collapse(collapseEl, {
          toggle: false
        })
  
        const expectEnd = () => {
          setTimeout(() => {
            expect().nothing()
            done()
          }, 10)
        }
  
        collapseEl.addEventListener('hide.coreui.collapse', e => {
          e.preventDefault()
          expectEnd()
        })
  
        collapseEl.addEventListener('hidden.coreui.collapse', () => {
          throw new Error('should not fire hidden event')
        })
  
        collapse.hide()
      })
    })
  
    describe('dispose', () => {
      it('should destroy a collapse', () => {
        fixtureEl.innerHTML = '<div class="collapse show"></div>'
  
        const collapseEl = fixtureEl.querySelector('div')
        const collapse = new Collapse(collapseEl, {
          toggle: false
        })
  
        expect(Collapse.getInstance(collapseEl)).toEqual(collapse)
  
        collapse.dispose()
  
        expect(Collapse.getInstance(collapseEl)).toEqual(null)
      })
    })
  
    describe('data-api', () => {
      it('should prevent url change if click on nested elements', done => {
        fixtureEl.innerHTML = [
          '<a role="button" data-coreui-toggle="collapse" class="collapsed" href="#collapse">',
          '  <span id="nested"></span>',
          '</a>',
          '<div id="collapse" class="collapse"></div>'
        ].join('')
  
        const triggerEl = fixtureEl.querySelector('a')
        const nestedTriggerEl = fixtureEl.querySelector('#nested')
  
        spyOn(Event.prototype, 'preventDefault').and.callThrough()
  
        triggerEl.addEventListener('click', event => {
          expect(event.target.isEqualNode(nestedTriggerEl)).toEqual(true)
          expect(event.delegateTarget.isEqualNode(triggerEl)).toEqual(true)
          expect(Event.prototype.preventDefault).toHaveBeenCalled()
          done()
        })
  
        nestedTriggerEl.click()
      })
  
      it('should show multiple collapsed elements', done => {
        fixtureEl.innerHTML = [
          '<a role="button" data-coreui-toggle="collapse" class="collapsed" href=".multi"></a>',
          '<div id="collapse1" class="collapse multi"></div>',
          '<div id="collapse2" class="collapse multi"></div>'
        ].join('')
  
        const trigger = fixtureEl.querySelector('a')
        const collapse1 = fixtureEl.querySelector('#collapse1')
        const collapse2 = fixtureEl.querySelector('#collapse2')
  
        collapse2.addEventListener('shown.coreui.collapse', () => {
          expect(trigger.getAttribute('aria-expanded')).toEqual('true')
          expect(trigger.classList.contains('collapsed')).toEqual(false)
          expect(collapse1.classList.contains('show')).toEqual(true)
          expect(collapse1.classList.contains('show')).toEqual(true)
          done()
        })
  
        trigger.click()
      })
  
      it('should hide multiple collapsed elements', done => {
        fixtureEl.innerHTML = [
          '<a role="button" data-coreui-toggle="collapse" href=".multi"></a>',
          '<div id="collapse1" class="collapse multi show"></div>',
          '<div id="collapse2" class="collapse multi show"></div>'
        ].join('')
  
        const trigger = fixtureEl.querySelector('a')
        const collapse1 = fixtureEl.querySelector('#collapse1')
        const collapse2 = fixtureEl.querySelector('#collapse2')
  
        collapse2.addEventListener('hidden.coreui.collapse', () => {
          expect(trigger.getAttribute('aria-expanded')).toEqual('false')
          expect(trigger.classList.contains('collapsed')).toEqual(true)
          expect(collapse1.classList.contains('show')).toEqual(false)
          expect(collapse1.classList.contains('show')).toEqual(false)
          done()
        })
  
        trigger.click()
      })
  
      it('should remove "collapsed" class from target when collapse is shown', done => {
        fixtureEl.innerHTML = [
          '<a id="link1" role="button" data-coreui-toggle="collapse" class="collapsed" href="#" data-coreui-target="#test1"></a>',
          '<a id="link2" role="button" data-coreui-toggle="collapse" class="collapsed" href="#" data-coreui-target="#test1"></a>',
          '<div id="test1"></div>'
        ].join('')
  
        const link1 = fixtureEl.querySelector('#link1')
        const link2 = fixtureEl.querySelector('#link2')
        const collapseTest1 = fixtureEl.querySelector('#test1')
  
        collapseTest1.addEventListener('shown.coreui.collapse', () => {
          expect(link1.getAttribute('aria-expanded')).toEqual('true')
          expect(link2.getAttribute('aria-expanded')).toEqual('true')
          expect(link1.classList.contains('collapsed')).toEqual(false)
          expect(link2.classList.contains('collapsed')).toEqual(false)
          done()
        })
  
        link1.click()
      })
  
      it('should add "collapsed" class to target when collapse is hidden', done => {
        fixtureEl.innerHTML = [
          '<a id="link1" role="button" data-coreui-toggle="collapse" href="#" data-coreui-target="#test1"></a>',
          '<a id="link2" role="button" data-coreui-toggle="collapse" href="#" data-coreui-target="#test1"></a>',
          '<div id="test1" class="show"></div>'
        ].join('')
  
        const link1 = fixtureEl.querySelector('#link1')
        const link2 = fixtureEl.querySelector('#link2')
        const collapseTest1 = fixtureEl.querySelector('#test1')
  
        collapseTest1.addEventListener('hidden.coreui.collapse', () => {
          expect(link1.getAttribute('aria-expanded')).toEqual('false')
          expect(link2.getAttribute('aria-expanded')).toEqual('false')
          expect(link1.classList.contains('collapsed')).toEqual(true)
          expect(link2.classList.contains('collapsed')).toEqual(true)
          done()
        })
  
        link1.click()
      })
  
      it('should allow accordion to use children other than card', done => {
        fixtureEl.innerHTML = [
          '<div id="accordion">',
          '  <div class="item">',
          '    <a id="linkTrigger" data-coreui-toggle="collapse" href="#collapseOne" aria-expanded="false" aria-controls="collapseOne"></a>',
          '    <div id="collapseOne" class="collapse" role="tabpanel" aria-labelledby="headingThree" data-coreui-parent="#accordion"></div>',
          '  </div>',
          '  <div class="item">',
          '    <a id="linkTriggerTwo" data-coreui-toggle="collapse" href="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo"></a>',
          '    <div id="collapseTwo" class="collapse show" role="tabpanel" aria-labelledby="headingTwo" data-coreui-parent="#accordion"></div>',
          '  </div>',
          '</div>'
        ].join('')
  
        const trigger = fixtureEl.querySelector('#linkTrigger')
        const triggerTwo = fixtureEl.querySelector('#linkTriggerTwo')
        const collapseOne = fixtureEl.querySelector('#collapseOne')
        const collapseTwo = fixtureEl.querySelector('#collapseTwo')
  
        collapseOne.addEventListener('shown.coreui.collapse', () => {
          expect(collapseOne.classList.contains('show')).toEqual(true)
          expect(collapseTwo.classList.contains('show')).toEqual(false)
  
          collapseTwo.addEventListener('shown.coreui.collapse', () => {
            expect(collapseOne.classList.contains('show')).toEqual(false)
            expect(collapseTwo.classList.contains('show')).toEqual(true)
            done()
          })
  
          triggerTwo.click()
        })
  
        trigger.click()
      })
  
      it('should not prevent event for input', done => {
        fixtureEl.innerHTML = [
          '<input type="checkbox" data-coreui-toggle="collapse" data-coreui-target="#collapsediv1">',
          '<div id="collapsediv1"></div>'
        ].join('')
  
        const target = fixtureEl.querySelector('input')
        const collapseEl = fixtureEl.querySelector('#collapsediv1')
  
        collapseEl.addEventListener('shown.coreui.collapse', () => {
          expect(collapseEl.classList.contains('show')).toEqual(true)
          expect(target.checked).toEqual(true)
          done()
        })
  
        target.click()
      })
  
      it('should allow accordion to contain nested elements', done => {
        fixtureEl.innerHTML = [
          '<div id="accordion">',
          '  <div class="row">',
          '    <div class="col-lg-6">',
          '      <div class="item">',
          '        <a id="linkTrigger" data-coreui-toggle="collapse" href="#collapseOne" aria-expanded="false" aria-controls="collapseOne"></a>',
          '        <div id="collapseOne" class="collapse" role="tabpanel" aria-labelledby="headingThree" data-coreui-parent="#accordion"></div>',
          '      </div>',
          '    </div>',
          '    <div class="col-lg-6">',
          '      <div class="item">',
          '        <a id="linkTriggerTwo" data-coreui-toggle="collapse" href="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo"></a>',
          '        <div id="collapseTwo" class="collapse show" role="tabpanel" aria-labelledby="headingTwo" data-coreui-parent="#accordion"></div>',
          '      </div>',
          '    </div>',
          '  </div>',
          '</div>'
        ].join('')
  
        const triggerEl = fixtureEl.querySelector('#linkTrigger')
        const triggerTwoEl = fixtureEl.querySelector('#linkTriggerTwo')
        const collapseOneEl = fixtureEl.querySelector('#collapseOne')
        const collapseTwoEl = fixtureEl.querySelector('#collapseTwo')
  
        collapseOneEl.addEventListener('shown.coreui.collapse', () => {
          expect(collapseOneEl.classList.contains('show')).toEqual(true)
          expect(triggerEl.classList.contains('collapsed')).toEqual(false)
          expect(triggerEl.getAttribute('aria-expanded')).toEqual('true')
  
          expect(collapseTwoEl.classList.contains('show')).toEqual(false)
          expect(triggerTwoEl.classList.contains('collapsed')).toEqual(true)
          expect(triggerTwoEl.getAttribute('aria-expanded')).toEqual('false')
  
          collapseTwoEl.addEventListener('shown.coreui.collapse', () => {
            expect(collapseOneEl.classList.contains('show')).toEqual(false)
            expect(triggerEl.classList.contains('collapsed')).toEqual(true)
            expect(triggerEl.getAttribute('aria-expanded')).toEqual('false')
  
            expect(collapseTwoEl.classList.contains('show')).toEqual(true)
            expect(triggerTwoEl.classList.contains('collapsed')).toEqual(false)
            expect(triggerTwoEl.getAttribute('aria-expanded')).toEqual('true')
            done()
          })
  
          triggerTwoEl.click()
        })
  
        triggerEl.click()
      })
  
      it('should allow accordion to target multiple elements', done => {
        fixtureEl.innerHTML = [
          '<div id="accordion">',
          '  <a id="linkTriggerOne" data-coreui-toggle="collapse" data-coreui-target=".collapseOne" href="#" aria-expanded="false" aria-controls="collapseOne"></a>',
          '  <a id="linkTriggerTwo" data-coreui-toggle="collapse" data-coreui-target=".collapseTwo" href="#" aria-expanded="false" aria-controls="collapseTwo"></a>',
          '  <div id="collapseOneOne" class="collapse collapseOne" role="tabpanel" data-coreui-parent="#accordion"></div>',
          '  <div id="collapseOneTwo" class="collapse collapseOne" role="tabpanel" data-coreui-parent="#accordion"></div>',
          '  <div id="collapseTwoOne" class="collapse collapseTwo" role="tabpanel" data-coreui-parent="#accordion"></div>',
          '  <div id="collapseTwoTwo" class="collapse collapseTwo" role="tabpanel" data-coreui-parent="#accordion"></div>',
          '</div>'
        ].join('')
  
        const trigger = fixtureEl.querySelector('#linkTriggerOne')
        const triggerTwo = fixtureEl.querySelector('#linkTriggerTwo')
        const collapseOneOne = fixtureEl.querySelector('#collapseOneOne')
        const collapseOneTwo = fixtureEl.querySelector('#collapseOneTwo')
        const collapseTwoOne = fixtureEl.querySelector('#collapseTwoOne')
        const collapseTwoTwo = fixtureEl.querySelector('#collapseTwoTwo')
        const collapsedElements = {
          one: false,
          two: false
        }
  
        function firstTest() {
          expect(collapseOneOne.classList.contains('show')).toEqual(true)
          expect(collapseOneTwo.classList.contains('show')).toEqual(true)
  
          expect(collapseTwoOne.classList.contains('show')).toEqual(false)
          expect(collapseTwoTwo.classList.contains('show')).toEqual(false)
  
          triggerTwo.click()
        }
  
        function secondTest() {
          expect(collapseOneOne.classList.contains('show')).toEqual(false)
          expect(collapseOneTwo.classList.contains('show')).toEqual(false)
  
          expect(collapseTwoOne.classList.contains('show')).toEqual(true)
          expect(collapseTwoTwo.classList.contains('show')).toEqual(true)
          done()
        }
  
        collapseOneOne.addEventListener('shown.coreui.collapse', () => {
          if (collapsedElements.one) {
            firstTest()
          } else {
            collapsedElements.one = true
          }
        })
  
        collapseOneTwo.addEventListener('shown.coreui.collapse', () => {
          if (collapsedElements.one) {
            firstTest()
          } else {
            collapsedElements.one = true
          }
        })
  
        collapseTwoOne.addEventListener('shown.coreui.collapse', () => {
          if (collapsedElements.two) {
            secondTest()
          } else {
            collapsedElements.two = true
          }
        })
  
        collapseTwoTwo.addEventListener('shown.coreui.collapse', () => {
          if (collapsedElements.two) {
            secondTest()
          } else {
            collapsedElements.two = true
          }
        })
  
        trigger.click()
      })
  
      it('should collapse accordion children but not nested accordion children', done => {
        fixtureEl.innerHTML = [
          '<div id="accordion">',
          '  <div class="item">',
          '    <a id="linkTrigger" data-coreui-toggle="collapse" href="#collapseOne" aria-expanded="false" aria-controls="collapseOne"></a>',
          '    <div id="collapseOne" data-coreui-parent="#accordion" class="collapse" role="tabpanel" aria-labelledby="headingThree">',
          '      <div id="nestedAccordion">',
          '        <div class="item">',
          '          <a id="nestedLinkTrigger" data-coreui-toggle="collapse" href="#nestedCollapseOne" aria-expanded="false" aria-controls="nestedCollapseOne"></a>',
          '          <div id="nestedCollapseOne" data-coreui-parent="#nestedAccordion" class="collapse" role="tabpanel" aria-labelledby="headingThree"></div>',
          '        </div>',
          '      </div>',
          '    </div>',
          '  </div>',
          '  <div class="item">',
          '    <a id="linkTriggerTwo" data-coreui-toggle="collapse" href="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo"></a>',
          '    <div id="collapseTwo" data-coreui-parent="#accordion" class="collapse show" role="tabpanel" aria-labelledby="headingTwo"></div>',
          '  </div>',
          '</div>'
        ].join('')
  
        const trigger = fixtureEl.querySelector('#linkTrigger')
        const triggerTwo = fixtureEl.querySelector('#linkTriggerTwo')
        const nestedTrigger = fixtureEl.querySelector('#nestedLinkTrigger')
        const collapseOne = fixtureEl.querySelector('#collapseOne')
        const collapseTwo = fixtureEl.querySelector('#collapseTwo')
        const nestedCollapseOne = fixtureEl.querySelector('#nestedCollapseOne')
  
        function handlerCollapseOne() {
          expect(collapseOne.classList.contains('show')).toEqual(true)
          expect(collapseTwo.classList.contains('show')).toEqual(false)
          expect(nestedCollapseOne.classList.contains('show')).toEqual(false)
  
          nestedCollapseOne.addEventListener('shown.coreui.collapse', handlerNestedCollapseOne)
          nestedTrigger.click()
          collapseOne.removeEventListener('shown.coreui.collapse', handlerCollapseOne)
        }
  
        function handlerNestedCollapseOne() {
          expect(collapseOne.classList.contains('show')).toEqual(true)
          expect(collapseTwo.classList.contains('show')).toEqual(false)
          expect(nestedCollapseOne.classList.contains('show')).toEqual(true)
  
          collapseTwo.addEventListener('shown.coreui.collapse', () => {
            expect(collapseOne.classList.contains('show')).toEqual(false)
            expect(collapseTwo.classList.contains('show')).toEqual(true)
            expect(nestedCollapseOne.classList.contains('show')).toEqual(true)
            done()
          })
  
          triggerTwo.click()
          nestedCollapseOne.removeEventListener('shown.coreui.collapse', handlerNestedCollapseOne)
        }
  
        collapseOne.addEventListener('shown.coreui.collapse', handlerCollapseOne)
        trigger.click()
      })
  
      it('should add "collapsed" class and set aria-expanded to triggers only when all the targeted collapse are hidden', done => {
        fixtureEl.innerHTML = [
          '<a id="trigger1" role="button" data-coreui-toggle="collapse" href="#test1"></a>',
          '<a id="trigger2" role="button" data-coreui-toggle="collapse" href="#test2"></a>',
          '<a id="trigger3" role="button" data-coreui-toggle="collapse" href=".multi"></a>',
          '<div id="test1" class="multi"></div>',
          '<div id="test2" class="multi"></div>'
        ].join('')
  
        const trigger1 = fixtureEl.querySelector('#trigger1')
        const trigger2 = fixtureEl.querySelector('#trigger2')
        const trigger3 = fixtureEl.querySelector('#trigger3')
        const target1 = fixtureEl.querySelector('#test1')
        const target2 = fixtureEl.querySelector('#test2')
  
        const target2Shown = () => {
          expect(trigger1.classList.contains('collapsed')).toEqual(false)
          expect(trigger1.getAttribute('aria-expanded')).toEqual('true')
  
          expect(trigger2.classList.contains('collapsed')).toEqual(false)
          expect(trigger2.getAttribute('aria-expanded')).toEqual('true')
  
          expect(trigger3.classList.contains('collapsed')).toEqual(false)
          expect(trigger3.getAttribute('aria-expanded')).toEqual('true')
  
          target2.addEventListener('hidden.coreui.collapse', () => {
            expect(trigger1.classList.contains('collapsed')).toEqual(false)
            expect(trigger1.getAttribute('aria-expanded')).toEqual('true')
  
            expect(trigger2.classList.contains('collapsed')).toEqual(true)
            expect(trigger2.getAttribute('aria-expanded')).toEqual('false')
  
            expect(trigger3.classList.contains('collapsed')).toEqual(false)
            expect(trigger3.getAttribute('aria-expanded')).toEqual('true')
  
            target1.addEventListener('hidden.coreui.collapse', () => {
              expect(trigger1.classList.contains('collapsed')).toEqual(true)
              expect(trigger1.getAttribute('aria-expanded')).toEqual('false')
  
              expect(trigger2.classList.contains('collapsed')).toEqual(true)
              expect(trigger2.getAttribute('aria-expanded')).toEqual('false')
  
              expect(trigger3.classList.contains('collapsed')).toEqual(true)
              expect(trigger3.getAttribute('aria-expanded')).toEqual('false')
              done()
            })
  
            trigger1.click()
          })
  
          trigger2.click()
        }
  
        target2.addEventListener('shown.coreui.collapse', target2Shown)
        trigger3.click()
      })
    })
  
    describe('jQueryInterface', () => {
      it('should create a collapse', () => {
        fixtureEl.innerHTML = '<div></div>'
  
        const div = fixtureEl.querySelector('div')
  
        jQueryMock.fn.collapse = Collapse.jQueryInterface
        jQueryMock.elements = [div]
  
        jQueryMock.fn.collapse.call(jQueryMock)
  
        expect(Collapse.getInstance(div)).toBeDefined()
      })
  
      it('should not re create a collapse', () => {
        fixtureEl.innerHTML = '<div></div>'
  
        const div = fixtureEl.querySelector('div')
        const collapse = new Collapse(div)
  
        jQueryMock.fn.collapse = Collapse.jQueryInterface
        jQueryMock.elements = [div]
  
        jQueryMock.fn.collapse.call(jQueryMock)
  
        expect(Collapse.getInstance(div)).toEqual(collapse)
      })
  
      it('should throw error on undefined method', () => {
        fixtureEl.innerHTML = '<div></div>'
  
        const div = fixtureEl.querySelector('div')
        const action = 'undefinedMethod'
  
        jQueryMock.fn.collapse = Collapse.jQueryInterface
        jQueryMock.elements = [div]
  
        expect(() => {
          jQueryMock.fn.collapse.call(jQueryMock, action)
        }).toThrowError(TypeError, `No method named "${action}"`)
      })
    })
  
    describe('getInstance', () => {
      it('should return collapse instance', () => {
        fixtureEl.innerHTML = '<div></div>'
  
        const div = fixtureEl.querySelector('div')
        const collapse = new Collapse(div)
  
        expect(Collapse.getInstance(div)).toEqual(collapse)
        expect(Collapse.getInstance(div)).toBeInstanceOf(Collapse)
      })
  
      it('should return null when there is no collapse instance', () => {
        fixtureEl.innerHTML = '<div></div>'
  
        const div = fixtureEl.querySelector('div')
  
        expect(Collapse.getInstance(div)).toEqual(null)
      })
    })
  })
  