4 files changed, 323 insertions, 4 deletions
diff --git a/js/tests/unit/util/backdrop.spec.js b/js/tests/unit/util/backdrop.spec.js
index 59b789071..b885b60b5 100644
--- a/js/tests/unit/util/backdrop.spec.js
+++ b/js/tests/unit/util/backdrop.spec.js
@@ -18,7 +18,7 @@ describe('Backdrop', () => {
     const list = document.querySelectorAll(CLASS_BACKDROP)
 
     list.forEach(el => {
-      document.body.removeChild(el)
+      el.remove()
     })
   })
 
@@ -141,7 +141,7 @@ describe('Backdrop', () => {
       const getElements = () => document.querySelectorAll(CLASS_BACKDROP)
 
       instance.show(() => {
-        wrapper.parentNode.removeChild(wrapper)
+        wrapper.remove()
         instance.hide(() => {
           expect(getElements().length).toEqual(0)
           done()
diff --git a/js/tests/unit/util/component-functions.spec.js b/js/tests/unit/util/component-functions.spec.js
new file mode 100644
index 000000000..edaedd32e
--- /dev/null
+++ b/js/tests/unit/util/component-functions.spec.js
@@ -0,0 +1,108 @@
+/* Test helpers */
+
+import { clearFixture, createEvent, getFixture } from '../../helpers/fixture'
+import { enableDismissTrigger } from '../../../src/util/component-functions'
+import BaseComponent from '../../../src/base-component'
+
+class DummyClass2 extends BaseComponent {
+  static get NAME() {
+    return 'test'
+  }
+
+  hide() {
+    return true
+  }
+
+  testMethod() {
+    return true
+  }
+}
+
+describe('Plugin functions', () => {
+  let fixtureEl
+
+  beforeAll(() => {
+    fixtureEl = getFixture()
+  })
+
+  afterEach(() => {
+    clearFixture()
+  })
+
+  describe('data-bs-dismiss functionality', () => {
+    it('should get Plugin and execute the given method, when a click occurred on data-bs-dismiss="PluginName"', () => {
+      fixtureEl.innerHTML = [
+        '<div id="foo" class="test">',
+        '      <button type="button" data-bs-dismiss="test" data-bs-target="#foo"></button>',
+        '</div>'
+      ].join('')
+
+      spyOn(DummyClass2, 'getOrCreateInstance').and.callThrough()
+      spyOn(DummyClass2.prototype, 'testMethod')
+      const componentWrapper = fixtureEl.querySelector('#foo')
+      const btnClose = fixtureEl.querySelector('[data-bs-dismiss="test"]')
+      const event = createEvent('click')
+
+      enableDismissTrigger(DummyClass2, 'testMethod')
+      btnClose.dispatchEvent(event)
+
+      expect(DummyClass2.getOrCreateInstance).toHaveBeenCalledWith(componentWrapper)
+      expect(DummyClass2.prototype.testMethod).toHaveBeenCalled()
+    })
+
+    it('if data-bs-dismiss="PluginName" hasn\'t got "data-bs-target", "getOrCreateInstance" has to be initialized by closest "plugin.Name" class', () => {
+      fixtureEl.innerHTML = [
+        '<div id="foo" class="test">',
+        '   <button type="button" data-bs-dismiss="test"></button>',
+        '</div>'
+      ].join('')
+
+      spyOn(DummyClass2, 'getOrCreateInstance').and.callThrough()
+      spyOn(DummyClass2.prototype, 'hide')
+      const componentWrapper = fixtureEl.querySelector('#foo')
+      const btnClose = fixtureEl.querySelector('[data-bs-dismiss="test"]')
+      const event = createEvent('click')
+
+      enableDismissTrigger(DummyClass2)
+      btnClose.dispatchEvent(event)
+
+      expect(DummyClass2.getOrCreateInstance).toHaveBeenCalledWith(componentWrapper)
+      expect(DummyClass2.prototype.hide).toHaveBeenCalled()
+    })
+
+    it('if data-bs-dismiss="PluginName" is disabled, must not trigger function', () => {
+      fixtureEl.innerHTML = [
+        '<div id="foo" class="test">',
+        '   <button type="button" disabled data-bs-dismiss="test"></button>',
+        '</div>'
+      ].join('')
+
+      spyOn(DummyClass2, 'getOrCreateInstance').and.callThrough()
+      const btnClose = fixtureEl.querySelector('[data-bs-dismiss="test"]')
+      const event = createEvent('click')
+
+      enableDismissTrigger(DummyClass2)
+      btnClose.dispatchEvent(event)
+
+      expect(DummyClass2.getOrCreateInstance).not.toHaveBeenCalled()
+    })
+
+    it('should prevent default when the trigger is <a> or <area>', () => {
+      fixtureEl.innerHTML = [
+        '<div id="foo" class="test">',
+        '      <a type="button" data-bs-dismiss="test"></a>',
+        '</div>'
+      ].join('')
+
+      const btnClose = fixtureEl.querySelector('[data-bs-dismiss="test"]')
+      const event = createEvent('click')
+
+      enableDismissTrigger(DummyClass2)
+      spyOn(Event.prototype, 'preventDefault').and.callThrough()
+
+      btnClose.dispatchEvent(event)
+
+      expect(Event.prototype.preventDefault).toHaveBeenCalled()
+    })
+  })
+})
diff --git a/js/tests/unit/util/focustrap.spec.js b/js/tests/unit/util/focustrap.spec.js
new file mode 100644
index 000000000..99bc95fca
--- /dev/null
+++ b/js/tests/unit/util/focustrap.spec.js
@@ -0,0 +1,210 @@
+import FocusTrap from '../../../src/util/focustrap'
+import EventHandler from '../../../src/dom/event-handler'
+import SelectorEngine from '../../../src/dom/selector-engine'
+import { clearFixture, getFixture, createEvent } from '../../helpers/fixture'
+
+describe('FocusTrap', () => {
+  let fixtureEl
+
+  beforeAll(() => {
+    fixtureEl = getFixture()
+  })
+
+  afterEach(() => {
+    clearFixture()
+  })
+
+  describe('activate', () => {
+    it('should autofocus itself by default', () => {
+      fixtureEl.innerHTML = '<div id="focustrap" tabindex="-1"></div>'
+
+      const trapElement = fixtureEl.querySelector('div')
+
+      spyOn(trapElement, 'focus')
+
+      const focustrap = new FocusTrap({ trapElement })
+      focustrap.activate()
+
+      expect(trapElement.focus).toHaveBeenCalled()
+    })
+
+    it('if configured not to autofocus, should not autofocus itself', () => {
+      fixtureEl.innerHTML = '<div id="focustrap" tabindex="-1"></div>'
+
+      const trapElement = fixtureEl.querySelector('div')
+
+      spyOn(trapElement, 'focus')
+
+      const focustrap = new FocusTrap({ trapElement, autofocus: false })
+      focustrap.activate()
+
+      expect(trapElement.focus).not.toHaveBeenCalled()
+    })
+
+    it('should force focus inside focus trap if it can', done => {
+      fixtureEl.innerHTML = [
+        '<a href="#" id="outside">outside</a>',
+        '<div id="focustrap" tabindex="-1">',
+        '   <a href="#" id="inside">inside</a>',
+        '</div>'
+      ].join('')
+
+      const trapElement = fixtureEl.querySelector('div')
+      const focustrap = new FocusTrap({ trapElement })
+      focustrap.activate()
+
+      const inside = document.getElementById('inside')
+
+      const focusInListener = () => {
+        expect(inside.focus).toHaveBeenCalled()
+        document.removeEventListener('focusin', focusInListener)
+        done()
+      }
+
+      spyOn(inside, 'focus')
+      spyOn(SelectorEngine, 'focusableChildren').and.callFake(() => [inside])
+
+      document.addEventListener('focusin', focusInListener)
+
+      const focusInEvent = createEvent('focusin', { bubbles: true })
+      Object.defineProperty(focusInEvent, 'target', {
+        value: document.getElementById('outside')
+      })
+
+      document.dispatchEvent(focusInEvent)
+    })
+
+    it('should wrap focus around forward on tab', done => {
+      fixtureEl.innerHTML = [
+        '<a href="#" id="outside">outside</a>',
+        '<div id="focustrap" tabindex="-1">',
+        '   <a href="#" id="first">first</a>',
+        '   <a href="#" id="inside">inside</a>',
+        '   <a href="#" id="last">last</a>',
+        '</div>'
+      ].join('')
+
+      const trapElement = fixtureEl.querySelector('div')
+      const focustrap = new FocusTrap({ trapElement })
+      focustrap.activate()
+
+      const first = document.getElementById('first')
+      const inside = document.getElementById('inside')
+      const last = document.getElementById('last')
+      const outside = document.getElementById('outside')
+
+      spyOn(SelectorEngine, 'focusableChildren').and.callFake(() => [first, inside, last])
+      spyOn(first, 'focus').and.callThrough()
+
+      const focusInListener = () => {
+        expect(first.focus).toHaveBeenCalled()
+        first.removeEventListener('focusin', focusInListener)
+        done()
+      }
+
+      first.addEventListener('focusin', focusInListener)
+
+      const keydown = createEvent('keydown')
+      keydown.key = 'Tab'
+
+      document.dispatchEvent(keydown)
+      outside.focus()
+    })
+
+    it('should wrap focus around backwards on shift-tab', done => {
+      fixtureEl.innerHTML = [
+        '<a href="#" id="outside">outside</a>',
+        '<div id="focustrap" tabindex="-1">',
+        '   <a href="#" id="first">first</a>',
+        '   <a href="#" id="inside">inside</a>',
+        '   <a href="#" id="last">last</a>',
+        '</div>'
+      ].join('')
+
+      const trapElement = fixtureEl.querySelector('div')
+      const focustrap = new FocusTrap({ trapElement })
+      focustrap.activate()
+
+      const first = document.getElementById('first')
+      const inside = document.getElementById('inside')
+      const last = document.getElementById('last')
+      const outside = document.getElementById('outside')
+
+      spyOn(SelectorEngine, 'focusableChildren').and.callFake(() => [first, inside, last])
+      spyOn(last, 'focus').and.callThrough()
+
+      const focusInListener = () => {
+        expect(last.focus).toHaveBeenCalled()
+        last.removeEventListener('focusin', focusInListener)
+        done()
+      }
+
+      last.addEventListener('focusin', focusInListener)
+
+      const keydown = createEvent('keydown')
+      keydown.key = 'Tab'
+      keydown.shiftKey = true
+
+      document.dispatchEvent(keydown)
+      outside.focus()
+    })
+
+    it('should force focus on itself if there is no focusable content', done => {
+      fixtureEl.innerHTML = [
+        '<a href="#" id="outside">outside</a>',
+        '<div id="focustrap" tabindex="-1"></div>'
+      ].join('')
+
+      const trapElement = fixtureEl.querySelector('div')
+      const focustrap = new FocusTrap({ trapElement })
+      focustrap.activate()
+
+      const focusInListener = () => {
+        expect(focustrap._config.trapElement.focus).toHaveBeenCalled()
+        document.removeEventListener('focusin', focusInListener)
+        done()
+      }
+
+      spyOn(focustrap._config.trapElement, 'focus')
+
+      document.addEventListener('focusin', focusInListener)
+
+      const focusInEvent = createEvent('focusin', { bubbles: true })
+      Object.defineProperty(focusInEvent, 'target', {
+        value: document.getElementById('outside')
+      })
+
+      document.dispatchEvent(focusInEvent)
+    })
+  })
+
+  describe('deactivate', () => {
+    it('should flag itself as no longer active', () => {
+      const focustrap = new FocusTrap({ trapElement: fixtureEl })
+      focustrap.activate()
+      expect(focustrap._isActive).toBe(true)
+
+      focustrap.deactivate()
+      expect(focustrap._isActive).toBe(false)
+    })
+
+    it('should remove all event listeners', () => {
+      const focustrap = new FocusTrap({ trapElement: fixtureEl })
+      focustrap.activate()
+
+      spyOn(EventHandler, 'off')
+      focustrap.deactivate()
+
+      expect(EventHandler.off).toHaveBeenCalled()
+    })
+
+    it('doesn\'t try removing event listeners unless it needs to (in case it hasn\'t been activated)', () => {
+      const focustrap = new FocusTrap({ trapElement: fixtureEl })
+
+      spyOn(EventHandler, 'off')
+      focustrap.deactivate()
+
+      expect(EventHandler.off).not.toHaveBeenCalled()
+    })
+  })
+})
diff --git a/js/tests/unit/util/index.spec.js b/js/tests/unit/util/index.spec.js
index 9b5d7b70e..38e94dc6b 100644
--- a/js/tests/unit/util/index.spec.js
+++ b/js/tests/unit/util/index.spec.js
@@ -543,8 +543,9 @@ describe('Util', () => {
       fixtureEl.innerHTML = '<div></div>'
 
       const div = fixtureEl.querySelector('div')
-
-      expect(Util.reflow(div)).toEqual(0)
+      const spy = spyOnProperty(div, 'offsetHeight')
+      Util.reflow(div)
+      expect(spy).toHaveBeenCalled()
     })
   })