Adding upstream version 5.2.3+dfsg.upstream/5.2.3+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1101 insertions, 0 deletions

diff --git a/js/tests/unit/tab.spec.js b/js/tests/unit/tab.spec.js
new file mode 100644
index 0000000..e0c7d86
--- /dev/null
+++ b/js/tests/unit/tab.spec.js
@@ -0,0 +1,1101 @@
+import Tab from '../../src/tab'
+import { clearFixture, createEvent, getFixture, jQueryMock } from '../helpers/fixture'
+
+describe('Tab', () => {
+  let fixtureEl
+
+  beforeAll(() => {
+    fixtureEl = getFixture()
+  })
+
+  afterEach(() => {
+    clearFixture()
+  })
+
+  describe('VERSION', () => {
+    it('should return plugin version', () => {
+      expect(Tab.VERSION).toEqual(jasmine.any(String))
+    })
+  })
+
+  describe('constructor', () => {
+    it('should take care of element either passed as a CSS selector or DOM element', () => {
+      fixtureEl.innerHTML = [
+        '<ul class="nav">',
+        '  <li><a href="#home" role="tab">Home</a></li>',
+        '</ul>',
+        '<ul>',
+        '  <li id="home"></li>',
+        '</ul>'
+      ].join('')
+
+      const tabEl = fixtureEl.querySelector('[href="#home"]')
+      const tabBySelector = new Tab('[href="#home"]')
+      const tabByElement = new Tab(tabEl)
+
+      expect(tabBySelector._element).toEqual(tabEl)
+      expect(tabByElement._element).toEqual(tabEl)
+    })
+
+    it('Do not Throw exception if not parent', () => {
+      fixtureEl.innerHTML = [
+        fixtureEl.innerHTML = '<div class=""><div class="nav-link"></div></div>'
+      ].join('')
+      const navEl = fixtureEl.querySelector('.nav-link')
+
+      expect(() => {
+        new Tab(navEl) // eslint-disable-line no-new
+      }).not.toThrowError(TypeError)
+    })
+  })
+
+  describe('show', () => {
+    it('should activate element by tab id (using buttons, the preferred semantic way)', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav" role="tablist">',
+          '  <li><button type="button" data-bs-target="#home" role="tab">Home</button></li>',
+          '  <li><button type="button" id="triggerProfile" data-bs-target="#profile" role="tab">Profile</button></li>',
+          '</ul>',
+          '<ul>',
+          '  <li id="home" role="tabpanel"></li>',
+          '  <li id="profile" role="tabpanel"></li>',
+          '</ul>'
+        ].join('')
+
+        const profileTriggerEl = fixtureEl.querySelector('#triggerProfile')
+        const tab = new Tab(profileTriggerEl)
+
+        profileTriggerEl.addEventListener('shown.bs.tab', () => {
+          expect(fixtureEl.querySelector('#profile')).toHaveClass('active')
+          expect(profileTriggerEl.getAttribute('aria-selected')).toEqual('true')
+          resolve()
+        })
+
+        tab.show()
+      })
+    })
+
+    it('should activate element by tab id (using links for tabs - not ideal, but still supported)', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav" role="tablist">',
+          '  <li><a href="#home" role="tab">Home</a></li>',
+          '  <li><a id="triggerProfile" href="#profile" role="tab">Profile</a></li>',
+          '</ul>',
+          '<ul>',
+          '  <li id="home" role="tabpanel"></li>',
+          '  <li id="profile" role="tabpanel"></li>',
+          '</ul>'
+        ].join('')
+
+        const profileTriggerEl = fixtureEl.querySelector('#triggerProfile')
+        const tab = new Tab(profileTriggerEl)
+
+        profileTriggerEl.addEventListener('shown.bs.tab', () => {
+          expect(fixtureEl.querySelector('#profile')).toHaveClass('active')
+          expect(profileTriggerEl.getAttribute('aria-selected')).toEqual('true')
+          resolve()
+        })
+
+        tab.show()
+      })
+    })
+
+    it('should activate element by tab id in ordered list', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ol class="nav nav-pills">',
+          '  <li><button type="button" data-bs-target="#home" role="tab">Home</button></li>',
+          '  <li><button type="button" id="triggerProfile" href="#profile" role="tab">Profile</button></li>',
+          '</ol>',
+          '<ol>',
+          '  <li id="home" role="tabpanel"></li>',
+          '  <li id="profile" role="tabpanel"></li>',
+          '</ol>'
+        ].join('')
+
+        const profileTriggerEl = fixtureEl.querySelector('#triggerProfile')
+        const tab = new Tab(profileTriggerEl)
+
+        profileTriggerEl.addEventListener('shown.bs.tab', () => {
+          expect(fixtureEl.querySelector('#profile')).toHaveClass('active')
+          resolve()
+        })
+
+        tab.show()
+      })
+    })
+
+    it('should activate element by tab id in nav list', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<nav class="nav">',
+          '  <button type="button" data-bs-target="#home" role="tab">Home</button>',
+          '  <button type="button" id="triggerProfile" data-bs-target="#profile" role="tab">Profile</button>',
+          '</nav>',
+          '<div>',
+          '  <div id="home" role="tabpanel"></div>',
+          '  <div id="profile" role="tabpanel"></div>',
+          '</div>'
+        ].join('')
+
+        const profileTriggerEl = fixtureEl.querySelector('#triggerProfile')
+        const tab = new Tab(profileTriggerEl)
+
+        profileTriggerEl.addEventListener('shown.bs.tab', () => {
+          expect(fixtureEl.querySelector('#profile')).toHaveClass('active')
+          resolve()
+        })
+
+        tab.show()
+      })
+    })
+
+    it('should activate element by tab id in list group', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<div class="list-group" role="tablist">',
+          '  <button type="button" data-bs-target="#home" role="tab">Home</button>',
+          '  <button type="button" id="triggerProfile" data-bs-target="#profile" role="tab">Profile</button>',
+          '</div>',
+          '<div>',
+          '  <div id="home" role="tabpanel"></div>',
+          '  <div id="profile" role="tabpanel"></div>',
+          '</div>'
+        ].join('')
+
+        const profileTriggerEl = fixtureEl.querySelector('#triggerProfile')
+        const tab = new Tab(profileTriggerEl)
+
+        profileTriggerEl.addEventListener('shown.bs.tab', () => {
+          expect(fixtureEl.querySelector('#profile')).toHaveClass('active')
+          resolve()
+        })
+
+        tab.show()
+      })
+    })
+
+    it('should not fire shown when show is prevented', () => {
+      return new Promise((resolve, reject) => {
+        fixtureEl.innerHTML = '<div class="nav"><div class="nav-link"></div></div>'
+
+        const navEl = fixtureEl.querySelector('.nav > div')
+        const tab = new Tab(navEl)
+        const expectDone = () => {
+          setTimeout(() => {
+            expect().nothing()
+            resolve()
+          }, 30)
+        }
+
+        navEl.addEventListener('show.bs.tab', ev => {
+          ev.preventDefault()
+          expectDone()
+        })
+
+        navEl.addEventListener('shown.bs.tab', () => {
+          reject(new Error('should not trigger shown event'))
+        })
+
+        tab.show()
+      })
+    })
+
+    it('should not fire shown when tab is already active', () => {
+      return new Promise((resolve, reject) => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav nav-tabs" role="tablist">',
+          '  <li class="nav-item" role="presentation"><button type="button" data-bs-target="#home" class="nav-link active" role="tab" aria-selected="true">Home</button></li>',
+          '  <li class="nav-item" role="presentation"><button type="button" data-bs-target="#profile" class="nav-link" role="tab">Profile</button></li>',
+          '</ul>',
+          '<div class="tab-content">',
+          '  <div class="tab-pane active" id="home" role="tabpanel"></div>',
+          '  <div class="tab-pane" id="profile" role="tabpanel"></div>',
+          '</div>'
+        ].join('')
+
+        const triggerActive = fixtureEl.querySelector('button.active')
+        const tab = new Tab(triggerActive)
+
+        triggerActive.addEventListener('shown.bs.tab', () => {
+          reject(new Error('should not trigger shown event'))
+        })
+
+        tab.show()
+        setTimeout(() => {
+          expect().nothing()
+          resolve()
+        }, 30)
+      })
+    })
+
+    it('show and shown events should reference correct relatedTarget', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav nav-tabs" role="tablist">',
+          '  <li class="nav-item" role="presentation"><button type="button" data-bs-target="#home" class="nav-link active" role="tab" aria-selected="true">Home</button></li>',
+          '  <li class="nav-item" role="presentation"><button type="button" id="triggerProfile" data-bs-target="#profile" class="nav-link" role="tab">Profile</button></li>',
+          '</ul>',
+          '<div class="tab-content">',
+          '  <div class="tab-pane active" id="home" role="tabpanel"></div>',
+          '  <div class="tab-pane" id="profile" role="tabpanel"></div>',
+          '</div>'
+        ].join('')
+
+        const secondTabTrigger = fixtureEl.querySelector('#triggerProfile')
+        const secondTab = new Tab(secondTabTrigger)
+
+        secondTabTrigger.addEventListener('show.bs.tab', ev => {
+          expect(ev.relatedTarget.getAttribute('data-bs-target')).toEqual('#home')
+        })
+
+        secondTabTrigger.addEventListener('shown.bs.tab', ev => {
+          expect(ev.relatedTarget.getAttribute('data-bs-target')).toEqual('#home')
+          expect(secondTabTrigger.getAttribute('aria-selected')).toEqual('true')
+          expect(fixtureEl.querySelector('button:not(.active)').getAttribute('aria-selected')).toEqual('false')
+          resolve()
+        })
+
+        secondTab.show()
+      })
+    })
+
+    it('should fire hide and hidden events', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav" role="tablist">',
+          '  <li><button type="button" data-bs-target="#home" role="tab">Home</button></li>',
+          '  <li><button type="button" data-bs-target="#profile" role="tab">Profile</button></li>',
+          '</ul>'
+        ].join('')
+
+        const triggerList = fixtureEl.querySelectorAll('button')
+        const firstTab = new Tab(triggerList[0])
+        const secondTab = new Tab(triggerList[1])
+
+        let hideCalled = false
+        triggerList[0].addEventListener('shown.bs.tab', () => {
+          secondTab.show()
+        })
+
+        triggerList[0].addEventListener('hide.bs.tab', ev => {
+          hideCalled = true
+          expect(ev.relatedTarget.getAttribute('data-bs-target')).toEqual('#profile')
+        })
+
+        triggerList[0].addEventListener('hidden.bs.tab', ev => {
+          expect(hideCalled).toBeTrue()
+          expect(ev.relatedTarget.getAttribute('data-bs-target')).toEqual('#profile')
+          resolve()
+        })
+
+        firstTab.show()
+      })
+    })
+
+    it('should not fire hidden when hide is prevented', () => {
+      return new Promise((resolve, reject) => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav" role="tablist">',
+          '  <li><button type="button" data-bs-target="#home" role="tab">Home</button></li>',
+          '  <li><button type="button" data-bs-target="#profile" role="tab">Profile</button></li>',
+          '</ul>'
+        ].join('')
+
+        const triggerList = fixtureEl.querySelectorAll('button')
+        const firstTab = new Tab(triggerList[0])
+        const secondTab = new Tab(triggerList[1])
+        const expectDone = () => {
+          setTimeout(() => {
+            expect().nothing()
+            resolve()
+          }, 30)
+        }
+
+        triggerList[0].addEventListener('shown.bs.tab', () => {
+          secondTab.show()
+        })
+
+        triggerList[0].addEventListener('hide.bs.tab', ev => {
+          ev.preventDefault()
+          expectDone()
+        })
+
+        triggerList[0].addEventListener('hidden.bs.tab', () => {
+          reject(new Error('should not trigger hidden'))
+        })
+
+        firstTab.show()
+      })
+    })
+
+    it('should handle removed tabs', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav nav-tabs" role="tablist">',
+          '  <li class="nav-item" role="presentation">',
+          '    <a class="nav-link nav-tab" href="#profile" role="tab" data-bs-toggle="tab">',
+          '      <button class="btn-close" aria-label="Close"></button>',
+          '    </a>',
+          '  </li>',
+          '  <li class="nav-item" role="presentation">',
+          '    <a id="secondNav" class="nav-link nav-tab" href="#buzz" role="tab" data-bs-toggle="tab">',
+          '      <button class="btn-close" aria-label="Close"></button>',
+          '    </a>',
+          '  </li>',
+          '  <li class="nav-item" role="presentation">',
+          '    <a class="nav-link nav-tab" href="#references" role="tab" data-bs-toggle="tab">',
+          '      <button id="btnClose" class="btn-close" aria-label="Close"></button>',
+          '    </a>',
+          '  </li>',
+          '</ul>',
+          '<div class="tab-content">',
+          '  <div role="tabpanel" class="tab-pane fade show active" id="profile">test 1</div>',
+          '  <div role="tabpanel" class="tab-pane fade" id="buzz">test 2</div>',
+          '  <div role="tabpanel" class="tab-pane fade" id="references">test 3</div>',
+          '</div>'
+        ].join('')
+
+        const secondNavEl = fixtureEl.querySelector('#secondNav')
+        const btnCloseEl = fixtureEl.querySelector('#btnClose')
+        const secondNavTab = new Tab(secondNavEl)
+
+        secondNavEl.addEventListener('shown.bs.tab', () => {
+          expect(fixtureEl.querySelectorAll('.nav-tab')).toHaveSize(2)
+          resolve()
+        })
+
+        btnCloseEl.addEventListener('click', () => {
+          const linkEl = btnCloseEl.parentNode
+          const liEl = linkEl.parentNode
+          const tabId = linkEl.getAttribute('href')
+          const tabIdEl = fixtureEl.querySelector(tabId)
+
+          liEl.remove()
+          tabIdEl.remove()
+          secondNavTab.show()
+        })
+
+        btnCloseEl.click()
+      })
+    })
+
+    it('should not focus on opened tab', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav" role="tablist">',
+          '  <li><button type="button" id="home" data-bs-target="#home" role="tab">Home</button></li>',
+          '  <li><button type="button" id="triggerProfile" data-bs-target="#profile" role="tab">Profile</button></li>',
+          '</ul>',
+          '<ul>',
+          '  <li id="home" role="tabpanel"></li>',
+          '  <li id="profile" role="tabpanel"></li>',
+          '</ul>'
+        ].join('')
+
+        const firstTab = fixtureEl.querySelector('#home')
+        firstTab.focus()
+
+        const profileTriggerEl = fixtureEl.querySelector('#triggerProfile')
+        const tab = new Tab(profileTriggerEl)
+
+        profileTriggerEl.addEventListener('shown.bs.tab', () => {
+          expect(document.activeElement).toBe(firstTab)
+          expect(document.activeElement).not.toBe(profileTriggerEl)
+          resolve()
+        })
+
+        tab.show()
+      })
+    })
+  })
+
+  describe('dispose', () => {
+    it('should dispose a tab', () => {
+      fixtureEl.innerHTML = '<div class="nav"><div class="nav-link"></div></div>'
+
+      const el = fixtureEl.querySelector('.nav > div')
+      const tab = new Tab(fixtureEl.querySelector('.nav > div'))
+
+      expect(Tab.getInstance(el)).not.toBeNull()
+
+      tab.dispose()
+
+      expect(Tab.getInstance(el)).toBeNull()
+    })
+  })
+
+  describe('_activate', () => {
+    it('should not be called if element argument is null', () => {
+      fixtureEl.innerHTML = [
+        '<ul class="nav" role="tablist">',
+        '  <li class="nav-link"></li>',
+        '</ul>'
+      ].join('')
+
+      const tabEl = fixtureEl.querySelector('.nav-link')
+      const tab = new Tab(tabEl)
+      const spy = jasmine.createSpy('spy')
+
+      const spyQueue = spyOn(tab, '_queueCallback')
+      tab._activate(null, spy)
+      expect(spyQueue).not.toHaveBeenCalled()
+      expect(spy).not.toHaveBeenCalled()
+    })
+  })
+
+  describe('_setInitialAttributes', () => {
+    it('should put aria attributes', () => {
+      fixtureEl.innerHTML = [
+        '<ul class="nav">',
+        '  <li class="nav-link" id="foo" data-bs-target="#panel"></li>',
+        '  <li class="nav-link" data-bs-target="#panel2"></li>',
+        '</ul>',
+        '<div id="panel"></div>',
+        '<div id="panel2"></div>'
+      ].join('')
+
+      const tabEl = fixtureEl.querySelector('.nav-link')
+      const parent = fixtureEl.querySelector('.nav')
+      const children = fixtureEl.querySelectorAll('.nav-link')
+      const tabPanel = fixtureEl.querySelector('#panel')
+      const tabPanel2 = fixtureEl.querySelector('#panel2')
+
+      expect(parent.getAttribute('role')).toEqual(null)
+      expect(tabEl.getAttribute('role')).toEqual(null)
+      expect(tabPanel.getAttribute('role')).toEqual(null)
+      const tab = new Tab(tabEl)
+      tab._setInitialAttributes(parent, children)
+
+      expect(parent.getAttribute('role')).toEqual('tablist')
+      expect(tabEl.getAttribute('role')).toEqual('tab')
+
+      expect(tabPanel.getAttribute('role')).toEqual('tabpanel')
+      expect(tabPanel2.getAttribute('role')).toEqual('tabpanel')
+      expect(tabPanel.hasAttribute('tabindex')).toBeFalse()
+      expect(tabPanel.hasAttribute('tabindex2')).toBeFalse()
+
+      expect(tabPanel.getAttribute('aria-labelledby')).toEqual('#foo')
+      expect(tabPanel2.hasAttribute('aria-labelledby')).toBeFalse()
+    })
+  })
+
+  describe('_keydown', () => {
+    it('if event is not one of left/right/up/down arrow, ignore it', () => {
+      fixtureEl.innerHTML = [
+        '<ul class="nav">',
+        '  <li class="nav-link" data-bs-toggle="tab"></li>',
+        '</ul>'
+      ].join('')
+
+      const tabEl = fixtureEl.querySelector('.nav-link')
+      const tab = new Tab(tabEl)
+
+      const keydown = createEvent('keydown')
+      keydown.key = 'Enter'
+      const spyStop = spyOn(Event.prototype, 'stopPropagation').and.callThrough()
+      const spyPrevent = spyOn(Event.prototype, 'preventDefault').and.callThrough()
+      const spyKeydown = spyOn(tab, '_keydown')
+      const spyGet = spyOn(tab, '_getChildren')
+
+      tabEl.dispatchEvent(keydown)
+      expect(spyKeydown).toHaveBeenCalled()
+      expect(spyGet).not.toHaveBeenCalled()
+
+      expect(spyStop).not.toHaveBeenCalled()
+      expect(spyPrevent).not.toHaveBeenCalled()
+    })
+
+    it('if keydown event is right/down arrow, handle it', () => {
+      fixtureEl.innerHTML = [
+        '<div class="nav">',
+        '  <span id="tab1" class="nav-link" data-bs-toggle="tab"></span>',
+        '  <span id="tab2" class="nav-link" data-bs-toggle="tab"></span>',
+        '  <span id="tab3" class="nav-link" data-bs-toggle="tab"></span>',
+        '</div>'
+      ].join('')
+
+      const tabEl1 = fixtureEl.querySelector('#tab1')
+      const tabEl2 = fixtureEl.querySelector('#tab2')
+      const tabEl3 = fixtureEl.querySelector('#tab3')
+      const tab1 = new Tab(tabEl1)
+      const tab2 = new Tab(tabEl2)
+      const tab3 = new Tab(tabEl3)
+      const spyShow1 = spyOn(tab1, 'show').and.callThrough()
+      const spyShow2 = spyOn(tab2, 'show').and.callThrough()
+      const spyShow3 = spyOn(tab3, 'show').and.callThrough()
+      const spyFocus1 = spyOn(tabEl1, 'focus').and.callThrough()
+      const spyFocus2 = spyOn(tabEl2, 'focus').and.callThrough()
+      const spyFocus3 = spyOn(tabEl3, 'focus').and.callThrough()
+
+      const spyStop = spyOn(Event.prototype, 'stopPropagation').and.callThrough()
+      const spyPrevent = spyOn(Event.prototype, 'preventDefault').and.callThrough()
+
+      let keydown = createEvent('keydown')
+      keydown.key = 'ArrowRight'
+
+      tabEl1.dispatchEvent(keydown)
+      expect(spyShow2).toHaveBeenCalled()
+      expect(spyFocus2).toHaveBeenCalled()
+
+      keydown = createEvent('keydown')
+      keydown.key = 'ArrowDown'
+
+      tabEl2.dispatchEvent(keydown)
+      expect(spyShow3).toHaveBeenCalled()
+      expect(spyFocus3).toHaveBeenCalled()
+
+      tabEl3.dispatchEvent(keydown)
+      expect(spyShow1).toHaveBeenCalled()
+      expect(spyFocus1).toHaveBeenCalled()
+
+      expect(spyStop).toHaveBeenCalledTimes(3)
+      expect(spyPrevent).toHaveBeenCalledTimes(3)
+    })
+
+    it('if keydown event is left arrow, handle it', () => {
+      fixtureEl.innerHTML = [
+        '<div class="nav">',
+        '  <span id="tab1" class="nav-link" data-bs-toggle="tab"></span>',
+        '  <span id="tab2" class="nav-link" data-bs-toggle="tab"></span>',
+        '</div>'
+      ].join('')
+
+      const tabEl1 = fixtureEl.querySelector('#tab1')
+      const tabEl2 = fixtureEl.querySelector('#tab2')
+      const tab1 = new Tab(tabEl1)
+      const tab2 = new Tab(tabEl2)
+      const spyShow1 = spyOn(tab1, 'show').and.callThrough()
+      const spyShow2 = spyOn(tab2, 'show').and.callThrough()
+      const spyFocus1 = spyOn(tabEl1, 'focus').and.callThrough()
+      const spyFocus2 = spyOn(tabEl2, 'focus').and.callThrough()
+
+      const spyStop = spyOn(Event.prototype, 'stopPropagation').and.callThrough()
+      const spyPrevent = spyOn(Event.prototype, 'preventDefault').and.callThrough()
+
+      let keydown = createEvent('keydown')
+      keydown.key = 'ArrowLeft'
+
+      tabEl2.dispatchEvent(keydown)
+      expect(spyShow1).toHaveBeenCalled()
+      expect(spyFocus1).toHaveBeenCalled()
+
+      keydown = createEvent('keydown')
+      keydown.key = 'ArrowUp'
+
+      tabEl1.dispatchEvent(keydown)
+      expect(spyShow2).toHaveBeenCalled()
+      expect(spyFocus2).toHaveBeenCalled()
+
+      expect(spyStop).toHaveBeenCalledTimes(2)
+      expect(spyPrevent).toHaveBeenCalledTimes(2)
+    })
+
+    it('if keydown event is right arrow and next element is disabled', () => {
+      fixtureEl.innerHTML = [
+        '<div class="nav">',
+        '  <span id="tab1" class="nav-link" data-bs-toggle="tab"></span>',
+        '  <span id="tab2" class="nav-link" data-bs-toggle="tab" disabled></span>',
+        '  <span id="tab3" class="nav-link disabled" data-bs-toggle="tab"></span>',
+        '  <span id="tab4" class="nav-link" data-bs-toggle="tab"></span>',
+        '</div>'
+      ].join('')
+
+      const tabEl = fixtureEl.querySelector('#tab1')
+      const tabEl2 = fixtureEl.querySelector('#tab2')
+      const tabEl3 = fixtureEl.querySelector('#tab3')
+      const tabEl4 = fixtureEl.querySelector('#tab4')
+      const tab = new Tab(tabEl)
+      const tab2 = new Tab(tabEl2)
+      const tab3 = new Tab(tabEl3)
+      const tab4 = new Tab(tabEl4)
+      const spy1 = spyOn(tab, 'show').and.callThrough()
+      const spy2 = spyOn(tab2, 'show').and.callThrough()
+      const spy3 = spyOn(tab3, 'show').and.callThrough()
+      const spy4 = spyOn(tab4, 'show').and.callThrough()
+      const spyFocus1 = spyOn(tabEl, 'focus').and.callThrough()
+      const spyFocus2 = spyOn(tabEl2, 'focus').and.callThrough()
+      const spyFocus3 = spyOn(tabEl3, 'focus').and.callThrough()
+      const spyFocus4 = spyOn(tabEl4, 'focus').and.callThrough()
+
+      const keydown = createEvent('keydown')
+      keydown.key = 'ArrowRight'
+
+      tabEl.dispatchEvent(keydown)
+      expect(spy1).not.toHaveBeenCalled()
+      expect(spy2).not.toHaveBeenCalled()
+      expect(spy3).not.toHaveBeenCalled()
+      expect(spy4).toHaveBeenCalledTimes(1)
+      expect(spyFocus1).not.toHaveBeenCalled()
+      expect(spyFocus2).not.toHaveBeenCalled()
+      expect(spyFocus3).not.toHaveBeenCalled()
+      expect(spyFocus4).toHaveBeenCalledTimes(1)
+    })
+
+    it('if keydown event is left arrow and next element is disabled', () => {
+      fixtureEl.innerHTML = [
+        '<div class="nav">',
+        '  <span id="tab1" class="nav-link" data-bs-toggle="tab"></span>',
+        '  <span id="tab2" class="nav-link" data-bs-toggle="tab" disabled></span>',
+        '  <span id="tab3" class="nav-link disabled" data-bs-toggle="tab"></span>',
+        '  <span id="tab4" class="nav-link" data-bs-toggle="tab"></span>',
+        '</div>'
+      ].join('')
+
+      const tabEl = fixtureEl.querySelector('#tab1')
+      const tabEl2 = fixtureEl.querySelector('#tab2')
+      const tabEl3 = fixtureEl.querySelector('#tab3')
+      const tabEl4 = fixtureEl.querySelector('#tab4')
+      const tab = new Tab(tabEl)
+      const tab2 = new Tab(tabEl2)
+      const tab3 = new Tab(tabEl3)
+      const tab4 = new Tab(tabEl4)
+      const spy1 = spyOn(tab, 'show').and.callThrough()
+      const spy2 = spyOn(tab2, 'show').and.callThrough()
+      const spy3 = spyOn(tab3, 'show').and.callThrough()
+      const spy4 = spyOn(tab4, 'show').and.callThrough()
+      const spyFocus1 = spyOn(tabEl, 'focus').and.callThrough()
+      const spyFocus2 = spyOn(tabEl2, 'focus').and.callThrough()
+      const spyFocus3 = spyOn(tabEl3, 'focus').and.callThrough()
+      const spyFocus4 = spyOn(tabEl4, 'focus').and.callThrough()
+
+      const keydown = createEvent('keydown')
+      keydown.key = 'ArrowLeft'
+
+      tabEl4.dispatchEvent(keydown)
+      expect(spy4).not.toHaveBeenCalled()
+      expect(spy3).not.toHaveBeenCalled()
+      expect(spy2).not.toHaveBeenCalled()
+      expect(spy1).toHaveBeenCalledTimes(1)
+      expect(spyFocus4).not.toHaveBeenCalled()
+      expect(spyFocus3).not.toHaveBeenCalled()
+      expect(spyFocus2).not.toHaveBeenCalled()
+      expect(spyFocus1).toHaveBeenCalledTimes(1)
+    })
+  })
+
+  describe('jQueryInterface', () => {
+    it('should create a tab', () => {
+      fixtureEl.innerHTML = '<div class="nav"><div class="nav-link"></div></div>'
+
+      const div = fixtureEl.querySelector('.nav > div')
+
+      jQueryMock.fn.tab = Tab.jQueryInterface
+      jQueryMock.elements = [div]
+
+      jQueryMock.fn.tab.call(jQueryMock)
+
+      expect(Tab.getInstance(div)).not.toBeNull()
+    })
+
+    it('should not re create a tab', () => {
+      fixtureEl.innerHTML = '<div class="nav"><div class="nav-link"></div></div>'
+
+      const div = fixtureEl.querySelector('.nav > div')
+      const tab = new Tab(div)
+
+      jQueryMock.fn.tab = Tab.jQueryInterface
+      jQueryMock.elements = [div]
+
+      jQueryMock.fn.tab.call(jQueryMock)
+
+      expect(Tab.getInstance(div)).toEqual(tab)
+    })
+
+    it('should call a tab method', () => {
+      fixtureEl.innerHTML = '<div class="nav"><div class="nav-link"></div></div>'
+
+      const div = fixtureEl.querySelector('.nav > div')
+      const tab = new Tab(div)
+
+      const spy = spyOn(tab, 'show')
+
+      jQueryMock.fn.tab = Tab.jQueryInterface
+      jQueryMock.elements = [div]
+
+      jQueryMock.fn.tab.call(jQueryMock, 'show')
+
+      expect(Tab.getInstance(div)).toEqual(tab)
+      expect(spy).toHaveBeenCalled()
+    })
+
+    it('should throw error on undefined method', () => {
+      fixtureEl.innerHTML = '<div class="nav"><div class="nav-link"></div></div>'
+
+      const div = fixtureEl.querySelector('.nav > div')
+      const action = 'undefinedMethod'
+
+      jQueryMock.fn.tab = Tab.jQueryInterface
+      jQueryMock.elements = [div]
+
+      expect(() => {
+        jQueryMock.fn.tab.call(jQueryMock, action)
+      }).toThrowError(TypeError, `No method named "${action}"`)
+    })
+  })
+
+  describe('getInstance', () => {
+    it('should return null if there is no instance', () => {
+      expect(Tab.getInstance(fixtureEl)).toBeNull()
+    })
+
+    it('should return this instance', () => {
+      fixtureEl.innerHTML = '<div class="nav"><div class="nav-link"></div></div>'
+
+      const divEl = fixtureEl.querySelector('.nav > div')
+      const tab = new Tab(divEl)
+
+      expect(Tab.getInstance(divEl)).toEqual(tab)
+      expect(Tab.getInstance(divEl)).toBeInstanceOf(Tab)
+    })
+  })
+
+  describe('getOrCreateInstance', () => {
+    it('should return tab instance', () => {
+      fixtureEl.innerHTML = '<div class="nav"><div class="nav-link"></div></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const tab = new Tab(div)
+
+      expect(Tab.getOrCreateInstance(div)).toEqual(tab)
+      expect(Tab.getInstance(div)).toEqual(Tab.getOrCreateInstance(div, {}))
+      expect(Tab.getOrCreateInstance(div)).toBeInstanceOf(Tab)
+    })
+
+    it('should return new instance when there is no tab instance', () => {
+      fixtureEl.innerHTML = '<div class="nav"><div class="nav-link"></div></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      expect(Tab.getInstance(div)).toBeNull()
+      expect(Tab.getOrCreateInstance(div)).toBeInstanceOf(Tab)
+    })
+  })
+
+  describe('data-api', () => {
+    it('should create dynamically a tab', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav nav-tabs" role="tablist">',
+          '  <li class="nav-item" role="presentation"><button type="button" data-bs-target="#home" class="nav-link active" role="tab" aria-selected="true">Home</button></li>',
+          '  <li class="nav-item" role="presentation"><button type="button" id="triggerProfile" data-bs-toggle="tab" data-bs-target="#profile" class="nav-link" role="tab">Profile</button></li>',
+          '</ul>',
+          '<div class="tab-content">',
+          '  <div class="tab-pane active" id="home" role="tabpanel"></div>',
+          '  <div class="tab-pane" id="profile" role="tabpanel"></div>',
+          '</div>'
+        ].join('')
+
+        const secondTabTrigger = fixtureEl.querySelector('#triggerProfile')
+
+        secondTabTrigger.addEventListener('shown.bs.tab', () => {
+          expect(secondTabTrigger).toHaveClass('active')
+          expect(fixtureEl.querySelector('#profile')).toHaveClass('active')
+          resolve()
+        })
+
+        secondTabTrigger.click()
+      })
+    })
+
+    it('selected tab should deactivate previous selected link in dropdown', () => {
+      fixtureEl.innerHTML = [
+        '<ul class="nav nav-tabs">',
+        '  <li class="nav-item"><a class="nav-link" href="#home" data-bs-toggle="tab">Home</a></li>',
+        '  <li class="nav-item"><a class="nav-link" href="#profile" data-bs-toggle="tab">Profile</a></li>',
+        '  <li class="nav-item dropdown">',
+        '    <a class="nav-link dropdown-toggle active" data-bs-toggle="dropdown" href="#">Dropdown</a>',
+        '    <div class="dropdown-menu">',
+        '      <a class="dropdown-item active" href="#dropdown1" id="dropdown1-tab" data-bs-toggle="tab">@fat</a>',
+        '      <a class="dropdown-item" href="#dropdown2" id="dropdown2-tab" data-bs-toggle="tab">@mdo</a>',
+        '    </div>',
+        '  </li>',
+        '</ul>'
+      ].join('')
+
+      const firstLiLinkEl = fixtureEl.querySelector('li:first-child a')
+
+      firstLiLinkEl.click()
+      expect(firstLiLinkEl).toHaveClass('active')
+      expect(fixtureEl.querySelector('li:last-child a')).not.toHaveClass('active')
+      expect(fixtureEl.querySelector('li:last-child .dropdown-menu a:first-child')).not.toHaveClass('active')
+    })
+
+    it('selecting a dropdown tab does not activate another', () => {
+      const nav1 = [
+        '<ul class="nav nav-tabs" id="nav1">',
+        '  <li class="nav-item active"><a class="nav-link" href="#home" data-bs-toggle="tab">Home</a></li>',
+        '  <li class="nav-item dropdown">',
+        '    <a class="nav-link dropdown-toggle" data-bs-toggle="dropdown" href="#">Dropdown</a>',
+        '    <div class="dropdown-menu">',
+        '      <a class="dropdown-item" href="#dropdown1" id="dropdown1-tab" data-bs-toggle="tab">@fat</a>',
+        '    </div>',
+        '  </li>',
+        '</ul>'
+      ].join('')
+      const nav2 = [
+        '<ul class="nav nav-tabs" id="nav2">',
+        '  <li class="nav-item active"><a class="nav-link" href="#home" data-bs-toggle="tab">Home</a></li>',
+        '  <li class="nav-item dropdown">',
+        '    <a class="nav-link dropdown-toggle" data-bs-toggle="dropdown" href="#">Dropdown</a>',
+        '    <div class="dropdown-menu">',
+        '      <a class="dropdown-item" href="#dropdown1" id="dropdown1-tab" data-bs-toggle="tab">@fat</a>',
+        '    </div>',
+        '  </li>',
+        '</ul>'
+      ].join('')
+
+      fixtureEl.innerHTML = nav1 + nav2
+
+      const firstDropItem = fixtureEl.querySelector('#nav1 .dropdown-item')
+
+      firstDropItem.click()
+      expect(firstDropItem).toHaveClass('active')
+      expect(fixtureEl.querySelector('#nav1 .dropdown-toggle')).toHaveClass('active')
+      expect(fixtureEl.querySelector('#nav2 .dropdown-toggle')).not.toHaveClass('active')
+      expect(fixtureEl.querySelector('#nav2 .dropdown-item')).not.toHaveClass('active')
+    })
+
+    it('should support li > .dropdown-item', () => {
+      fixtureEl.innerHTML = [
+        '<ul class="nav nav-tabs">',
+        '  <li class="nav-item"><a class="nav-link active" href="#home" data-bs-toggle="tab">Home</a></li>',
+        '  <li class="nav-item"><a class="nav-link" href="#profile" data-bs-toggle="tab">Profile</a></li>',
+        '  <li class="nav-item dropdown">',
+        '    <a class="nav-link dropdown-toggle" data-bs-toggle="dropdown" href="#">Dropdown</a>',
+        '    <ul class="dropdown-menu">',
+        '      <li><a class="dropdown-item" href="#dropdown1" id="dropdown1-tab" data-bs-toggle="tab">@fat</a></li>',
+        '      <li><a class="dropdown-item" href="#dropdown2" id="dropdown2-tab" data-bs-toggle="tab">@mdo</a></li>',
+        '    </ul>',
+        '  </li>',
+        '</ul>'
+      ].join('')
+
+      const dropItems = fixtureEl.querySelectorAll('.dropdown-item')
+
+      dropItems[1].click()
+      expect(dropItems[0]).not.toHaveClass('active')
+      expect(dropItems[1]).toHaveClass('active')
+      expect(fixtureEl.querySelector('.nav-link')).not.toHaveClass('active')
+    })
+
+    it('should handle nested tabs', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<nav class="nav nav-tabs" role="tablist">',
+          '  <button type="button" id="tab1" data-bs-target="#x-tab1" class="nav-link" data-bs-toggle="tab" role="tab" aria-controls="x-tab1">Tab 1</button>',
+          '  <button type="button" data-bs-target="#x-tab2" class="nav-link active" data-bs-toggle="tab" role="tab" aria-controls="x-tab2" aria-selected="true">Tab 2</button>',
+          '  <button type="button" data-bs-target="#x-tab3" class="nav-link" data-bs-toggle="tab" role="tab" aria-controls="x-tab3">Tab 3</button>',
+          '</nav>',
+          '<div class="tab-content">',
+          '  <div class="tab-pane" id="x-tab1" role="tabpanel">',
+          '    <nav class="nav nav-tabs" role="tablist">',
+          '      <button type="button" data-bs-target="#nested-tab1" class="nav-link active" data-bs-toggle="tab" role="tab" aria-controls="x-tab1" aria-selected="true">Nested Tab 1</button>',
+          '      <button type="button" id="tabNested2" data-bs-target="#nested-tab2" class="nav-link" data-bs-toggle="tab" role="tab" aria-controls="x-profile">Nested Tab2</button>',
+          '    </nav>',
+          '    <div class="tab-content">',
+          '      <div class="tab-pane active" id="nested-tab1" role="tabpanel">Nested Tab1 Content</div>',
+          '      <div class="tab-pane" id="nested-tab2" role="tabpanel">Nested Tab2 Content</div>',
+          '    </div>',
+          '  </div>',
+          '  <div class="tab-pane active" id="x-tab2" role="tabpanel">Tab2 Content</div>',
+          '  <div class="tab-pane" id="x-tab3" role="tabpanel">Tab3 Content</div>',
+          '</div>'
+        ].join('')
+
+        const tab1El = fixtureEl.querySelector('#tab1')
+        const tabNested2El = fixtureEl.querySelector('#tabNested2')
+        const xTab1El = fixtureEl.querySelector('#x-tab1')
+
+        tabNested2El.addEventListener('shown.bs.tab', () => {
+          expect(xTab1El).toHaveClass('active')
+          resolve()
+        })
+
+        tab1El.addEventListener('shown.bs.tab', () => {
+          expect(xTab1El).toHaveClass('active')
+          tabNested2El.click()
+        })
+
+        tab1El.click()
+      })
+    })
+
+    it('should not remove fade class if no active pane is present', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav nav-tabs" role="tablist">',
+          '  <li class="nav-item" role="presentation"><button type="button" id="tab-home" data-bs-target="#home" class="nav-link" data-bs-toggle="tab" role="tab">Home</button></li>',
+          '  <li class="nav-item" role="presentation"><button type="button" id="tab-profile" data-bs-target="#profile" class="nav-link" data-bs-toggle="tab" role="tab">Profile</button></li>',
+          '</ul>',
+          '<div class="tab-content">',
+          '  <div class="tab-pane fade" id="home" role="tabpanel"></div>',
+          '  <div class="tab-pane fade" id="profile" role="tabpanel"></div>',
+          '</div>'
+        ].join('')
+
+        const triggerTabProfileEl = fixtureEl.querySelector('#tab-profile')
+        const triggerTabHomeEl = fixtureEl.querySelector('#tab-home')
+        const tabProfileEl = fixtureEl.querySelector('#profile')
+        const tabHomeEl = fixtureEl.querySelector('#home')
+
+        triggerTabHomeEl.addEventListener('shown.bs.tab', () => {
+          setTimeout(() => {
+            expect(tabProfileEl).toHaveClass('fade')
+            expect(tabProfileEl).not.toHaveClass('show')
+
+            expect(tabHomeEl).toHaveClass('fade')
+            expect(tabHomeEl).toHaveClass('show')
+
+            resolve()
+          }, 10)
+        })
+
+        triggerTabProfileEl.addEventListener('shown.bs.tab', () => {
+          setTimeout(() => {
+            expect(tabProfileEl).toHaveClass('fade')
+            expect(tabProfileEl).toHaveClass('show')
+            triggerTabHomeEl.click()
+          }, 10)
+        })
+
+        triggerTabProfileEl.click()
+      })
+    })
+
+    it('should add `show` class to tab panes if there is no `.fade` class', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav nav-tabs" role="tablist">',
+          '  <li class="nav-item" role="presentation">',
+          '    <button type="button" class="nav-link nav-tab" data-bs-target="#home" role="tab" data-bs-toggle="tab">Home</button>',
+          '  </li>',
+          '  <li class="nav-item" role="presentation">',
+          '    <button type="button" id="secondNav" class="nav-link nav-tab" data-bs-target="#profile" role="tab" data-bs-toggle="tab">Profile</button>',
+          '  </li>',
+          '</ul>',
+          '<div class="tab-content">',
+          '  <div role="tabpanel" class="tab-pane" id="home">test 1</div>',
+          '  <div role="tabpanel" class="tab-pane" id="profile">test 2</div>',
+          '</div>'
+        ].join('')
+
+        const secondNavEl = fixtureEl.querySelector('#secondNav')
+
+        secondNavEl.addEventListener('shown.bs.tab', () => {
+          expect(fixtureEl.querySelectorAll('.tab-content .show')).toHaveSize(1)
+          resolve()
+        })
+
+        secondNavEl.click()
+      })
+    })
+
+    it('should add show class to tab panes if there is a `.fade` class', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav nav-tabs" role="tablist">',
+          '  <li class="nav-item" role="presentation">',
+          '    <button type="button" class="nav-link nav-tab" data-bs-target="#home" role="tab" data-bs-toggle="tab">Home</button>',
+          '  </li>',
+          '  <li class="nav-item" role="presentation">',
+          '    <button type="button" id="secondNav" class="nav-link nav-tab" data-bs-target="#profile" role="tab" data-bs-toggle="tab">Profile</button>',
+          '  </li>',
+          '</ul>',
+          '<div class="tab-content">',
+          '  <div role="tabpanel" class="tab-pane fade" id="home">test 1</div>',
+          '  <div role="tabpanel" class="tab-pane fade" id="profile">test 2</div>',
+          '</div>'
+        ].join('')
+
+        const secondNavEl = fixtureEl.querySelector('#secondNav')
+
+        secondNavEl.addEventListener('shown.bs.tab', () => {
+          setTimeout(() => {
+            expect(fixtureEl.querySelectorAll('.show')).toHaveSize(1)
+            resolve()
+          }, 10)
+        })
+
+        secondNavEl.click()
+      })
+    })
+
+    it('should prevent default when the trigger is <a> or <area>', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav" role="tablist">',
+          '  <li><a type="button" href="#test"  class="active" role="tab" data-bs-toggle="tab">Home</a></li>',
+          '  <li><a type="button" href="#test2" role="tab" data-bs-toggle="tab">Home</a></li>',
+          '</ul>'
+        ].join('')
+
+        const tabEl = fixtureEl.querySelector('[href="#test2"]')
+        const spy = spyOn(Event.prototype, 'preventDefault').and.callThrough()
+
+        tabEl.addEventListener('shown.bs.tab', () => {
+          expect(tabEl).toHaveClass('active')
+          expect(spy).toHaveBeenCalled()
+          resolve()
+        })
+
+        tabEl.click()
+      })
+    })
+
+    it('should not fire shown when tab has disabled attribute', () => {
+      return new Promise((resolve, reject) => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav nav-tabs" role="tablist">',
+          '  <li class="nav-item" role="presentation"><button type="button" data-bs-target="#home" class="nav-link active" role="tab" aria-selected="true">Home</button></li>',
+          '  <li class="nav-item" role="presentation"><button type="button" data-bs-target="#profile" class="nav-link" disabled role="tab">Profile</button></li>',
+          '</ul>',
+          '<div class="tab-content">',
+          '  <div class="tab-pane active" id="home" role="tabpanel"></div>',
+          '  <div class="tab-pane" id="profile" role="tabpanel"></div>',
+          '</div>'
+        ].join('')
+
+        const triggerDisabled = fixtureEl.querySelector('button[disabled]')
+        triggerDisabled.addEventListener('shown.bs.tab', () => {
+          reject(new Error('should not trigger shown event'))
+        })
+
+        triggerDisabled.click()
+        setTimeout(() => {
+          expect().nothing()
+          resolve()
+        }, 30)
+      })
+    })
+
+    it('should not fire shown when tab has disabled class', () => {
+      return new Promise((resolve, reject) => {
+        fixtureEl.innerHTML = [
+          '<ul class="nav nav-tabs" role="tablist">',
+          '  <li class="nav-item" role="presentation"><a href="#home" class="nav-link active" role="tab" aria-selected="true">Home</a></li>',
+          '  <li class="nav-item" role="presentation"><a href="#profile" class="nav-link disabled" role="tab">Profile</a></li>',
+          '</ul>',
+          '<div class="tab-content">',
+          '  <div class="tab-pane active" id="home" role="tabpanel"></div>',
+          '  <div class="tab-pane" id="profile" role="tabpanel"></div>',
+          '</div>'
+        ].join('')
+
+        const triggerDisabled = fixtureEl.querySelector('a.disabled')
+
+        triggerDisabled.addEventListener('shown.bs.tab', () => {
+          reject(new Error('should not trigger shown event'))
+        })
+
+        triggerDisabled.click()
+        setTimeout(() => {
+          expect().nothing()
+          resolve()
+        }, 30)
+      })
+    })
+  })
+})