rewrite tab unit tests

1 files changed, 267 insertions, 0 deletions

diff --git a/js/src/tab/tab.js b/js/src/tab/tab.js
new file mode 100644
index 000000000..e882ff1d2
--- /dev/null
+++ b/js/src/tab/tab.js
@@ -0,0 +1,267 @@
+/**
+ * --------------------------------------------------------------------------
+ * Bootstrap (v4.3.1): tab.js
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * --------------------------------------------------------------------------
+ */
+
+import {
+  jQuery as $,
+  TRANSITION_END,
+  emulateTransitionEnd,
+  getSelectorFromElement,
+  getTransitionDurationFromElement,
+  makeArray,
+  reflow
+} from '../util/index'
+import Data from '../dom/data'
+import EventHandler from '../dom/event-handler'
+import SelectorEngine from '../dom/selector-engine'
+
+/**
+ * ------------------------------------------------------------------------
+ * Constants
+ * ------------------------------------------------------------------------
+ */
+
+const NAME = 'tab'
+const VERSION = '4.3.1'
+const DATA_KEY = 'bs.tab'
+const EVENT_KEY = `.${DATA_KEY}`
+const DATA_API_KEY = '.data-api'
+
+const Event = {
+  HIDE: `hide${EVENT_KEY}`,
+  HIDDEN: `hidden${EVENT_KEY}`,
+  SHOW: `show${EVENT_KEY}`,
+  SHOWN: `shown${EVENT_KEY}`,
+  CLICK_DATA_API: `click${EVENT_KEY}${DATA_API_KEY}`
+}
+
+const ClassName = {
+  DROPDOWN_MENU: 'dropdown-menu',
+  ACTIVE: 'active',
+  DISABLED: 'disabled',
+  FADE: 'fade',
+  SHOW: 'show'
+}
+
+const Selector = {
+  DROPDOWN: '.dropdown',
+  NAV_LIST_GROUP: '.nav, .list-group',
+  ACTIVE: '.active',
+  ACTIVE_UL: ':scope > li > .active',
+  DATA_TOGGLE: '[data-toggle="tab"], [data-toggle="pill"], [data-toggle="list"]',
+  DROPDOWN_TOGGLE: '.dropdown-toggle',
+  DROPDOWN_ACTIVE_CHILD: ':scope > .dropdown-menu .active'
+}
+
+/**
+ * ------------------------------------------------------------------------
+ * Class Definition
+ * ------------------------------------------------------------------------
+ */
+
+class Tab {
+  constructor(element) {
+    this._element = element
+
+    Data.setData(this._element, DATA_KEY, this)
+  }
+
+  // Getters
+
+  static get VERSION() {
+    return VERSION
+  }
+
+  // Public
+
+  show() {
+    if (this._element.parentNode &&
+      this._element.parentNode.nodeType === Node.ELEMENT_NODE &&
+      this._element.classList.contains(ClassName.ACTIVE) ||
+      this._element.classList.contains(ClassName.DISABLED)) {
+      return
+    }
+
+    let target
+    let previous
+    const listElement = SelectorEngine.closest(this._element, Selector.NAV_LIST_GROUP)
+    const selector = getSelectorFromElement(this._element)
+
+    if (listElement) {
+      const itemSelector = listElement.nodeName === 'UL' || listElement.nodeName === 'OL' ? Selector.ACTIVE_UL : Selector.ACTIVE
+      previous = makeArray(SelectorEngine.find(itemSelector, listElement))
+      previous = previous[previous.length - 1]
+    }
+
+    let hideEvent = null
+
+    if (previous) {
+      hideEvent = EventHandler.trigger(previous, Event.HIDE, {
+        relatedTarget: this._element
+      })
+    }
+
+    const showEvent = EventHandler.trigger(this._element, Event.SHOW, {
+      relatedTarget: previous
+    })
+
+    if (showEvent.defaultPrevented ||
+      hideEvent !== null && hideEvent.defaultPrevented) {
+      return
+    }
+
+    if (selector) {
+      target = SelectorEngine.findOne(selector)
+    }
+
+    this._activate(
+      this._element,
+      listElement
+    )
+
+    const complete = () => {
+      EventHandler.trigger(previous, Event.HIDDEN, {
+        relatedTarget: this._element
+      })
+      EventHandler.trigger(this._element, Event.SHOWN, {
+        relatedTarget: previous
+      })
+    }
+
+    if (target) {
+      this._activate(target, target.parentNode, complete)
+    } else {
+      complete()
+    }
+  }
+
+  dispose() {
+    Data.removeData(this._element, DATA_KEY)
+    this._element = null
+  }
+
+  // Private
+
+  _activate(element, container, callback) {
+    const activeElements = container && (container.nodeName === 'UL' || container.nodeName === 'OL') ?
+      SelectorEngine.find(Selector.ACTIVE_UL, container) :
+      SelectorEngine.children(container, Selector.ACTIVE)
+
+    const active = activeElements[0]
+    const isTransitioning = callback &&
+      (active && active.classList.contains(ClassName.FADE))
+
+    const complete = () => this._transitionComplete(
+      element,
+      active,
+      callback
+    )
+
+    if (active && isTransitioning) {
+      const transitionDuration = getTransitionDurationFromElement(active)
+      active.classList.remove(ClassName.SHOW)
+
+      EventHandler.one(active, TRANSITION_END, complete)
+      emulateTransitionEnd(active, transitionDuration)
+    } else {
+      complete()
+    }
+  }
+
+  _transitionComplete(element, active, callback) {
+    if (active) {
+      active.classList.remove(ClassName.ACTIVE)
+
+      const dropdownChild = SelectorEngine.findOne(Selector.DROPDOWN_ACTIVE_CHILD, active.parentNode)
+
+      if (dropdownChild) {
+        dropdownChild.classList.remove(ClassName.ACTIVE)
+      }
+
+      if (active.getAttribute('role') === 'tab') {
+        active.setAttribute('aria-selected', false)
+      }
+    }
+
+    element.classList.add(ClassName.ACTIVE)
+    if (element.getAttribute('role') === 'tab') {
+      element.setAttribute('aria-selected', true)
+    }
+
+    reflow(element)
+
+    if (element.classList.contains(ClassName.FADE)) {
+      element.classList.add(ClassName.SHOW)
+    }
+
+    if (element.parentNode && element.parentNode.classList.contains(ClassName.DROPDOWN_MENU)) {
+      const dropdownElement = SelectorEngine.closest(element, Selector.DROPDOWN)
+
+      if (dropdownElement) {
+        makeArray(SelectorEngine.find(Selector.DROPDOWN_TOGGLE))
+          .forEach(dropdown => dropdown.classList.add(ClassName.ACTIVE))
+      }
+
+      element.setAttribute('aria-expanded', true)
+    }
+
+    if (callback) {
+      callback()
+    }
+  }
+
+  // Static
+
+  static _jQueryInterface(config) {
+    return this.each(function () {
+      const data = Data.getData(this, DATA_KEY) || new Tab(this)
+
+      if (typeof config === 'string') {
+        if (typeof data[config] === 'undefined') {
+          throw new TypeError(`No method named "${config}"`)
+        }
+
+        data[config]()
+      }
+    })
+  }
+
+  static _getInstance(element) {
+    return Data.getData(element, DATA_KEY)
+  }
+}
+
+/**
+ * ------------------------------------------------------------------------
+ * Data Api implementation
+ * ------------------------------------------------------------------------
+ */
+
+EventHandler.on(document, Event.CLICK_DATA_API, Selector.DATA_TOGGLE, function (event) {
+  event.preventDefault()
+
+  const data = Data.getData(this, DATA_KEY) || new Tab(this)
+  data.show()
+})
+
+/**
+ * ------------------------------------------------------------------------
+ * jQuery
+ * ------------------------------------------------------------------------
+ * add .tab to jQuery only if jQuery is present
+ */
+/* istanbul ignore if */
+if (typeof $ !== 'undefined') {
+  const JQUERY_NO_CONFLICT = $.fn[NAME]
+  $.fn[NAME] = Tab._jQueryInterface
+  $.fn[NAME].Constructor = Tab
+  $.fn[NAME].noConflict = () => {
+    $.fn[NAME] = JQUERY_NO_CONFLICT
+    return Tab._jQueryInterface
+  }
+}
+
+export default Tab