From 3ea39841c8049525e31e9f4d6300f0c60cdb42de Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Tue, 24 Jan 2023 13:33:51 +0100
Subject: Adding upstream version 5.2.3+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 js/tests/unit/util/backdrop.spec.js            | 321 ++++++++++
 js/tests/unit/util/component-functions.spec.js | 108 ++++
 js/tests/unit/util/config.spec.js              | 166 +++++
 js/tests/unit/util/focustrap.spec.js           | 218 +++++++
 js/tests/unit/util/index.spec.js               | 814 +++++++++++++++++++++++++
 js/tests/unit/util/sanitizer.spec.js           | 105 ++++
 js/tests/unit/util/scrollbar.spec.js           | 363 +++++++++++
 js/tests/unit/util/swipe.spec.js               | 291 +++++++++
 js/tests/unit/util/template-factory.spec.js    | 306 ++++++++++
 9 files changed, 2692 insertions(+)
 create mode 100644 js/tests/unit/util/backdrop.spec.js
 create mode 100644 js/tests/unit/util/component-functions.spec.js
 create mode 100644 js/tests/unit/util/config.spec.js
 create mode 100644 js/tests/unit/util/focustrap.spec.js
 create mode 100644 js/tests/unit/util/index.spec.js
 create mode 100644 js/tests/unit/util/sanitizer.spec.js
 create mode 100644 js/tests/unit/util/scrollbar.spec.js
 create mode 100644 js/tests/unit/util/swipe.spec.js
 create mode 100644 js/tests/unit/util/template-factory.spec.js

(limited to 'js/tests/unit/util')

diff --git a/js/tests/unit/util/backdrop.spec.js b/js/tests/unit/util/backdrop.spec.js
new file mode 100644
index 0000000..73384fc
--- /dev/null
+++ b/js/tests/unit/util/backdrop.spec.js
@@ -0,0 +1,321 @@
+import Backdrop from '../../../src/util/backdrop'
+import { getTransitionDurationFromElement } from '../../../src/util/index'
+import { clearFixture, getFixture } from '../../helpers/fixture'
+
+const CLASS_BACKDROP = '.modal-backdrop'
+const CLASS_NAME_FADE = 'fade'
+const CLASS_NAME_SHOW = 'show'
+
+describe('Backdrop', () => {
+  let fixtureEl
+
+  beforeAll(() => {
+    fixtureEl = getFixture()
+  })
+
+  afterEach(() => {
+    clearFixture()
+    const list = document.querySelectorAll(CLASS_BACKDROP)
+
+    for (const el of list) {
+      el.remove()
+    }
+  })
+
+  describe('show', () => {
+    it('should append the backdrop html once on show and include the "show" class if it is "shown"', () => {
+      return new Promise(resolve => {
+        const instance = new Backdrop({
+          isVisible: true,
+          isAnimated: false
+        })
+        const getElements = () => document.querySelectorAll(CLASS_BACKDROP)
+
+        expect(getElements()).toHaveSize(0)
+
+        instance.show()
+        instance.show(() => {
+          expect(getElements()).toHaveSize(1)
+          for (const el of getElements()) {
+            expect(el).toHaveClass(CLASS_NAME_SHOW)
+          }
+
+          resolve()
+        })
+      })
+    })
+
+    it('should not append the backdrop html if it is not "shown"', () => {
+      return new Promise(resolve => {
+        const instance = new Backdrop({
+          isVisible: false,
+          isAnimated: true
+        })
+        const getElements = () => document.querySelectorAll(CLASS_BACKDROP)
+
+        expect(getElements()).toHaveSize(0)
+        instance.show(() => {
+          expect(getElements()).toHaveSize(0)
+          resolve()
+        })
+      })
+    })
+
+    it('should append the backdrop html once and include the "fade" class if it is "shown" and "animated"', () => {
+      return new Promise(resolve => {
+        const instance = new Backdrop({
+          isVisible: true,
+          isAnimated: true
+        })
+        const getElements = () => document.querySelectorAll(CLASS_BACKDROP)
+
+        expect(getElements()).toHaveSize(0)
+
+        instance.show(() => {
+          expect(getElements()).toHaveSize(1)
+          for (const el of getElements()) {
+            expect(el).toHaveClass(CLASS_NAME_FADE)
+          }
+
+          resolve()
+        })
+      })
+    })
+  })
+
+  describe('hide', () => {
+    it('should remove the backdrop html', () => {
+      return new Promise(resolve => {
+        const instance = new Backdrop({
+          isVisible: true,
+          isAnimated: true
+        })
+
+        const getElements = () => document.body.querySelectorAll(CLASS_BACKDROP)
+
+        expect(getElements()).toHaveSize(0)
+        instance.show(() => {
+          expect(getElements()).toHaveSize(1)
+          instance.hide(() => {
+            expect(getElements()).toHaveSize(0)
+            resolve()
+          })
+        })
+      })
+    })
+
+    it('should remove the "show" class', () => {
+      return new Promise(resolve => {
+        const instance = new Backdrop({
+          isVisible: true,
+          isAnimated: true
+        })
+        const elem = instance._getElement()
+
+        instance.show()
+        instance.hide(() => {
+          expect(elem).not.toHaveClass(CLASS_NAME_SHOW)
+          resolve()
+        })
+      })
+    })
+
+    it('should not try to remove Node on remove method if it is not "shown"', () => {
+      return new Promise(resolve => {
+        const instance = new Backdrop({
+          isVisible: false,
+          isAnimated: true
+        })
+        const getElements = () => document.querySelectorAll(CLASS_BACKDROP)
+        const spy = spyOn(instance, 'dispose').and.callThrough()
+
+        expect(getElements()).toHaveSize(0)
+        expect(instance._isAppended).toBeFalse()
+        instance.show(() => {
+          instance.hide(() => {
+            expect(getElements()).toHaveSize(0)
+            expect(spy).not.toHaveBeenCalled()
+            expect(instance._isAppended).toBeFalse()
+            resolve()
+          })
+        })
+      })
+    })
+
+    it('should not error if the backdrop no longer has a parent', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = '<div id="wrapper"></div>'
+
+        const wrapper = fixtureEl.querySelector('#wrapper')
+        const instance = new Backdrop({
+          isVisible: true,
+          isAnimated: true,
+          rootElement: wrapper
+        })
+
+        const getElements = () => document.querySelectorAll(CLASS_BACKDROP)
+
+        instance.show(() => {
+          wrapper.remove()
+          instance.hide(() => {
+            expect(getElements()).toHaveSize(0)
+            resolve()
+          })
+        })
+      })
+    })
+  })
+
+  describe('click callback', () => {
+    it('should execute callback on click', () => {
+      return new Promise(resolve => {
+        const spy = jasmine.createSpy('spy')
+
+        const instance = new Backdrop({
+          isVisible: true,
+          isAnimated: false,
+          clickCallback: () => spy()
+        })
+        const endTest = () => {
+          setTimeout(() => {
+            expect(spy).toHaveBeenCalled()
+            resolve()
+          }, 10)
+        }
+
+        instance.show(() => {
+          const clickEvent = new Event('mousedown', { bubbles: true, cancelable: true })
+          document.querySelector(CLASS_BACKDROP).dispatchEvent(clickEvent)
+          endTest()
+        })
+      })
+    })
+
+    describe('animation callbacks', () => {
+      it('should show and hide backdrop after counting transition duration if it is animated', () => {
+        return new Promise(resolve => {
+          const instance = new Backdrop({
+            isVisible: true,
+            isAnimated: true
+          })
+          const spy2 = jasmine.createSpy('spy2')
+
+          const execDone = () => {
+            setTimeout(() => {
+              expect(spy2).toHaveBeenCalledTimes(2)
+              resolve()
+            }, 10)
+          }
+
+          instance.show(spy2)
+          instance.hide(() => {
+            spy2()
+            execDone()
+          })
+          expect(spy2).not.toHaveBeenCalled()
+        })
+      })
+
+      it('should show and hide backdrop without a delay if it is not animated', () => {
+        return new Promise(resolve => {
+          const spy = jasmine.createSpy('spy', getTransitionDurationFromElement)
+          const instance = new Backdrop({
+            isVisible: true,
+            isAnimated: false
+          })
+          const spy2 = jasmine.createSpy('spy2')
+
+          instance.show(spy2)
+          instance.hide(spy2)
+
+          setTimeout(() => {
+            expect(spy2).toHaveBeenCalled()
+            expect(spy).not.toHaveBeenCalled()
+            resolve()
+          }, 10)
+        })
+      })
+
+      it('should not call delay callbacks if it is not "shown"', () => {
+        return new Promise(resolve => {
+          const instance = new Backdrop({
+            isVisible: false,
+            isAnimated: true
+          })
+          const spy = jasmine.createSpy('spy', getTransitionDurationFromElement)
+
+          instance.show()
+          instance.hide(() => {
+            expect(spy).not.toHaveBeenCalled()
+            resolve()
+          })
+        })
+      })
+    })
+
+    describe('Config', () => {
+      describe('rootElement initialization', () => {
+        it('should be appended on "document.body" by default', () => {
+          return new Promise(resolve => {
+            const instance = new Backdrop({
+              isVisible: true
+            })
+            const getElement = () => document.querySelector(CLASS_BACKDROP)
+            instance.show(() => {
+              expect(getElement().parentElement).toEqual(document.body)
+              resolve()
+            })
+          })
+        })
+
+        it('should find the rootElement if passed as a string', () => {
+          return new Promise(resolve => {
+            const instance = new Backdrop({
+              isVisible: true,
+              rootElement: 'body'
+            })
+            const getElement = () => document.querySelector(CLASS_BACKDROP)
+            instance.show(() => {
+              expect(getElement().parentElement).toEqual(document.body)
+              resolve()
+            })
+          })
+        })
+
+        it('should be appended on any element given by the proper config', () => {
+          return new Promise(resolve => {
+            fixtureEl.innerHTML = '<div id="wrapper"></div>'
+
+            const wrapper = fixtureEl.querySelector('#wrapper')
+            const instance = new Backdrop({
+              isVisible: true,
+              rootElement: wrapper
+            })
+            const getElement = () => document.querySelector(CLASS_BACKDROP)
+            instance.show(() => {
+              expect(getElement().parentElement).toEqual(wrapper)
+              resolve()
+            })
+          })
+        })
+      })
+
+      describe('ClassName', () => {
+        it('should allow configuring className', () => {
+          return new Promise(resolve => {
+            const instance = new Backdrop({
+              isVisible: true,
+              className: 'foo'
+            })
+            const getElement = () => document.querySelector('.foo')
+            instance.show(() => {
+              expect(getElement()).toEqual(instance._getElement())
+              instance.dispose()
+              resolve()
+            })
+          })
+        })
+      })
+    })
+  })
+})
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 0000000..ec36672
--- /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('')
+
+      const spyGet = spyOn(DummyClass2, 'getOrCreateInstance').and.callThrough()
+      const spyTest = 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(spyGet).toHaveBeenCalledWith(componentWrapper)
+      expect(spyTest).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('')
+
+      const spyGet = spyOn(DummyClass2, 'getOrCreateInstance').and.callThrough()
+      const spyHide = 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(spyGet).toHaveBeenCalledWith(componentWrapper)
+      expect(spyHide).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('')
+
+      const spy = spyOn(DummyClass2, 'getOrCreateInstance').and.callThrough()
+      const btnClose = fixtureEl.querySelector('[data-bs-dismiss="test"]')
+      const event = createEvent('click')
+
+      enableDismissTrigger(DummyClass2)
+      btnClose.dispatchEvent(event)
+
+      expect(spy).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)
+      const spy = spyOn(Event.prototype, 'preventDefault').and.callThrough()
+
+      btnClose.dispatchEvent(event)
+
+      expect(spy).toHaveBeenCalled()
+    })
+  })
+})
diff --git a/js/tests/unit/util/config.spec.js b/js/tests/unit/util/config.spec.js
new file mode 100644
index 0000000..e1693c0
--- /dev/null
+++ b/js/tests/unit/util/config.spec.js
@@ -0,0 +1,166 @@
+import Config from '../../../src/util/config'
+import { clearFixture, getFixture } from '../../helpers/fixture'
+
+class DummyConfigClass extends Config {
+  static get NAME() {
+    return 'dummy'
+  }
+}
+
+describe('Config', () => {
+  let fixtureEl
+  const name = 'dummy'
+
+  beforeAll(() => {
+    fixtureEl = getFixture()
+  })
+
+  afterEach(() => {
+    clearFixture()
+  })
+
+  describe('NAME', () => {
+    it('should return plugin NAME', () => {
+      expect(DummyConfigClass.NAME).toEqual(name)
+    })
+  })
+
+  describe('DefaultType', () => {
+    it('should return plugin default type', () => {
+      expect(DummyConfigClass.DefaultType).toEqual(jasmine.any(Object))
+    })
+  })
+
+  describe('Default', () => {
+    it('should return plugin defaults', () => {
+      expect(DummyConfigClass.Default).toEqual(jasmine.any(Object))
+    })
+  })
+
+  describe('mergeConfigObj', () => {
+    it('should parse element\'s data attributes and merge it with default config. Element\'s data attributes must excel Defaults', () => {
+      fixtureEl.innerHTML = '<div id="test" data-bs-test-bool="false" data-bs-test-int="8" data-bs-test-string1="bar"></div>'
+
+      spyOnProperty(DummyConfigClass, 'Default', 'get').and.returnValue({
+        testBool: true,
+        testString: 'foo',
+        testString1: 'foo',
+        testInt: 7
+      })
+      const instance = new DummyConfigClass()
+      const configResult = instance._mergeConfigObj({}, fixtureEl.querySelector('#test'))
+
+      expect(configResult.testBool).toEqual(false)
+      expect(configResult.testString).toEqual('foo')
+      expect(configResult.testString1).toEqual('bar')
+      expect(configResult.testInt).toEqual(8)
+    })
+
+    it('should parse element\'s data attributes and merge it with default config, plug these given during method call. The programmatically given should excel all', () => {
+      fixtureEl.innerHTML = '<div id="test" data-bs-test-bool="false" data-bs-test-int="8" data-bs-test-string-1="bar"></div>'
+
+      spyOnProperty(DummyConfigClass, 'Default', 'get').and.returnValue({
+        testBool: true,
+        testString: 'foo',
+        testString1: 'foo',
+        testInt: 7
+      })
+      const instance = new DummyConfigClass()
+      const configResult = instance._mergeConfigObj({
+        testString1: 'test',
+        testInt: 3
+      }, fixtureEl.querySelector('#test'))
+
+      expect(configResult.testBool).toEqual(false)
+      expect(configResult.testString).toEqual('foo')
+      expect(configResult.testString1).toEqual('test')
+      expect(configResult.testInt).toEqual(3)
+    })
+
+    it('should parse element\'s data attribute `config` and any rest attributes. The programmatically given should excel all. Data attribute `config` should excel only Defaults', () => {
+      fixtureEl.innerHTML = '<div id="test" data-bs-config=\'{"testBool":false,"testInt":50,"testInt2":100}\' data-bs-test-int="8" data-bs-test-string-1="bar"></div>'
+
+      spyOnProperty(DummyConfigClass, 'Default', 'get').and.returnValue({
+        testBool: true,
+        testString: 'foo',
+        testString1: 'foo',
+        testInt: 7,
+        testInt2: 600
+      })
+      const instance = new DummyConfigClass()
+      const configResult = instance._mergeConfigObj({
+        testString1: 'test'
+      }, fixtureEl.querySelector('#test'))
+
+      expect(configResult.testBool).toEqual(false)
+      expect(configResult.testString).toEqual('foo')
+      expect(configResult.testString1).toEqual('test')
+      expect(configResult.testInt).toEqual(8)
+      expect(configResult.testInt2).toEqual(100)
+    })
+
+    it('should omit element\'s data attribute `config` if is not an object', () => {
+      fixtureEl.innerHTML = '<div id="test" data-bs-config="foo" data-bs-test-int="8"></div>'
+
+      spyOnProperty(DummyConfigClass, 'Default', 'get').and.returnValue({
+        testInt: 7,
+        testInt2: 79
+      })
+      const instance = new DummyConfigClass()
+      const configResult = instance._mergeConfigObj({}, fixtureEl.querySelector('#test'))
+
+      expect(configResult.testInt).toEqual(8)
+      expect(configResult.testInt2).toEqual(79)
+    })
+  })
+
+  describe('typeCheckConfig', () => {
+    it('should check type of the config object', () => {
+      spyOnProperty(DummyConfigClass, 'DefaultType', 'get').and.returnValue({
+        toggle: 'boolean',
+        parent: '(string|element)'
+      })
+      const config = {
+        toggle: true,
+        parent: 777
+      }
+
+      const obj = new DummyConfigClass()
+      expect(() => {
+        obj._typeCheckConfig(config)
+      }).toThrowError(TypeError, obj.constructor.NAME.toUpperCase() + ': Option "parent" provided type "number" but expected type "(string|element)".')
+    })
+
+    it('should return null stringified when null is passed', () => {
+      spyOnProperty(DummyConfigClass, 'DefaultType', 'get').and.returnValue({
+        toggle: 'boolean',
+        parent: '(null|element)'
+      })
+
+      const obj = new DummyConfigClass()
+      const config = {
+        toggle: true,
+        parent: null
+      }
+
+      obj._typeCheckConfig(config)
+      expect().nothing()
+    })
+
+    it('should return undefined stringified when undefined is passed', () => {
+      spyOnProperty(DummyConfigClass, 'DefaultType', 'get').and.returnValue({
+        toggle: 'boolean',
+        parent: '(undefined|element)'
+      })
+
+      const obj = new DummyConfigClass()
+      const config = {
+        toggle: true,
+        parent: undefined
+      }
+
+      obj._typeCheckConfig(config)
+      expect().nothing()
+    })
+  })
+})
diff --git a/js/tests/unit/util/focustrap.spec.js b/js/tests/unit/util/focustrap.spec.js
new file mode 100644
index 0000000..bedd124
--- /dev/null
+++ b/js/tests/unit/util/focustrap.spec.js
@@ -0,0 +1,218 @@
+import FocusTrap from '../../../src/util/focustrap'
+import EventHandler from '../../../src/dom/event-handler'
+import SelectorEngine from '../../../src/dom/selector-engine'
+import { clearFixture, createEvent, getFixture } 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')
+
+      const spy = spyOn(trapElement, 'focus')
+
+      const focustrap = new FocusTrap({ trapElement })
+      focustrap.activate()
+
+      expect(spy).toHaveBeenCalled()
+    })
+
+    it('if configured not to autofocus, should not autofocus itself', () => {
+      fixtureEl.innerHTML = '<div id="focustrap" tabindex="-1"></div>'
+
+      const trapElement = fixtureEl.querySelector('div')
+
+      const spy = spyOn(trapElement, 'focus')
+
+      const focustrap = new FocusTrap({ trapElement, autofocus: false })
+      focustrap.activate()
+
+      expect(spy).not.toHaveBeenCalled()
+    })
+
+    it('should force focus inside focus trap if it can', () => {
+      return new Promise(resolve => {
+        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(spy).toHaveBeenCalled()
+          document.removeEventListener('focusin', focusInListener)
+          resolve()
+        }
+
+        const spy = 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', () => {
+      return new Promise(resolve => {
+        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])
+        const spy = spyOn(first, 'focus').and.callThrough()
+
+        const focusInListener = () => {
+          expect(spy).toHaveBeenCalled()
+          first.removeEventListener('focusin', focusInListener)
+          resolve()
+        }
+
+        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', () => {
+      return new Promise(resolve => {
+        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])
+        const spy = spyOn(last, 'focus').and.callThrough()
+
+        const focusInListener = () => {
+          expect(spy).toHaveBeenCalled()
+          last.removeEventListener('focusin', focusInListener)
+          resolve()
+        }
+
+        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', () => {
+      return new Promise(resolve => {
+        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(spy).toHaveBeenCalled()
+          document.removeEventListener('focusin', focusInListener)
+          resolve()
+        }
+
+        const spy = 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).toBeTrue()
+
+      focustrap.deactivate()
+      expect(focustrap._isActive).toBeFalse()
+    })
+
+    it('should remove all event listeners', () => {
+      const focustrap = new FocusTrap({ trapElement: fixtureEl })
+      focustrap.activate()
+
+      const spy = spyOn(EventHandler, 'off')
+      focustrap.deactivate()
+
+      expect(spy).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 })
+
+      const spy = spyOn(EventHandler, 'off')
+      focustrap.deactivate()
+
+      expect(spy).not.toHaveBeenCalled()
+    })
+  })
+})
diff --git a/js/tests/unit/util/index.spec.js b/js/tests/unit/util/index.spec.js
new file mode 100644
index 0000000..9f28ce0
--- /dev/null
+++ b/js/tests/unit/util/index.spec.js
@@ -0,0 +1,814 @@
+import * as Util from '../../../src/util/index'
+import { clearFixture, getFixture } from '../../helpers/fixture'
+import { noop } from '../../../src/util/index'
+
+describe('Util', () => {
+  let fixtureEl
+
+  beforeAll(() => {
+    fixtureEl = getFixture()
+  })
+
+  afterEach(() => {
+    clearFixture()
+  })
+
+  describe('getUID', () => {
+    it('should generate uid', () => {
+      const uid = Util.getUID('bs')
+      const uid2 = Util.getUID('bs')
+
+      expect(uid).not.toEqual(uid2)
+    })
+  })
+
+  describe('getSelectorFromElement', () => {
+    it('should get selector from data-bs-target', () => {
+      fixtureEl.innerHTML = [
+        '<div id="test" data-bs-target=".target"></div>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(Util.getSelectorFromElement(testEl)).toEqual('.target')
+    })
+
+    it('should get selector from href if no data-bs-target set', () => {
+      fixtureEl.innerHTML = [
+        '<a id="test" href=".target"></a>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(Util.getSelectorFromElement(testEl)).toEqual('.target')
+    })
+
+    it('should get selector from href if data-bs-target equal to #', () => {
+      fixtureEl.innerHTML = [
+        '<a id="test" data-bs-target="#" href=".target"></a>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(Util.getSelectorFromElement(testEl)).toEqual('.target')
+    })
+
+    it('should return null if a selector from a href is a url without an anchor', () => {
+      fixtureEl.innerHTML = [
+        '<a id="test" data-bs-target="#" href="foo/bar.html"></a>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(Util.getSelectorFromElement(testEl)).toBeNull()
+    })
+
+    it('should return the anchor if a selector from a href is a url', () => {
+      fixtureEl.innerHTML = [
+        '<a id="test" data-bs-target="#" href="foo/bar.html#target"></a>',
+        '<div id="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(Util.getSelectorFromElement(testEl)).toEqual('#target')
+    })
+
+    it('should return null if selector not found', () => {
+      fixtureEl.innerHTML = '<a id="test" href=".target"></a>'
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(Util.getSelectorFromElement(testEl)).toBeNull()
+    })
+
+    it('should return null if no selector', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const testEl = fixtureEl.querySelector('div')
+
+      expect(Util.getSelectorFromElement(testEl)).toBeNull()
+    })
+  })
+
+  describe('getElementFromSelector', () => {
+    it('should get element from data-bs-target', () => {
+      fixtureEl.innerHTML = [
+        '<div id="test" data-bs-target=".target"></div>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(Util.getElementFromSelector(testEl)).toEqual(fixtureEl.querySelector('.target'))
+    })
+
+    it('should get element from href if no data-bs-target set', () => {
+      fixtureEl.innerHTML = [
+        '<a id="test" href=".target"></a>',
+        '<div class="target"></div>'
+      ].join('')
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(Util.getElementFromSelector(testEl)).toEqual(fixtureEl.querySelector('.target'))
+    })
+
+    it('should return null if element not found', () => {
+      fixtureEl.innerHTML = '<a id="test" href=".target"></a>'
+
+      const testEl = fixtureEl.querySelector('#test')
+
+      expect(Util.getElementFromSelector(testEl)).toBeNull()
+    })
+
+    it('should return null if no selector', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const testEl = fixtureEl.querySelector('div')
+
+      expect(Util.getElementFromSelector(testEl)).toBeNull()
+    })
+  })
+
+  describe('getTransitionDurationFromElement', () => {
+    it('should get transition from element', () => {
+      fixtureEl.innerHTML = '<div style="transition: all 300ms ease-out;"></div>'
+
+      expect(Util.getTransitionDurationFromElement(fixtureEl.querySelector('div'))).toEqual(300)
+    })
+
+    it('should return 0 if the element is undefined or null', () => {
+      expect(Util.getTransitionDurationFromElement(null)).toEqual(0)
+      expect(Util.getTransitionDurationFromElement(undefined)).toEqual(0)
+    })
+
+    it('should return 0 if the element do not possess transition', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      expect(Util.getTransitionDurationFromElement(fixtureEl.querySelector('div'))).toEqual(0)
+    })
+  })
+
+  describe('triggerTransitionEnd', () => {
+    it('should trigger transitionend event', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = '<div></div>'
+
+        const el = fixtureEl.querySelector('div')
+        const spy = spyOn(el, 'dispatchEvent').and.callThrough()
+
+        el.addEventListener('transitionend', () => {
+          expect(spy).toHaveBeenCalled()
+          resolve()
+        })
+
+        Util.triggerTransitionEnd(el)
+      })
+    })
+  })
+
+  describe('isElement', () => {
+    it('should detect if the parameter is an element or not and return Boolean', () => {
+      fixtureEl.innerHTML = [
+        '<div id="foo" class="test"></div>',
+        '<div id="bar" class="test"></div>'
+      ].join('')
+
+      const el = fixtureEl.querySelector('#foo')
+
+      expect(Util.isElement(el)).toBeTrue()
+      expect(Util.isElement({})).toBeFalse()
+      expect(Util.isElement(fixtureEl.querySelectorAll('.test'))).toBeFalse()
+    })
+
+    it('should detect jQuery element', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const el = fixtureEl.querySelector('div')
+      const fakejQuery = {
+        0: el,
+        jquery: 'foo'
+      }
+
+      expect(Util.isElement(fakejQuery)).toBeTrue()
+    })
+  })
+
+  describe('getElement', () => {
+    it('should try to parse element', () => {
+      fixtureEl.innerHTML = [
+        '<div id="foo" class="test"></div>',
+        '<div id="bar" class="test"></div>'
+      ].join('')
+
+      const el = fixtureEl.querySelector('div')
+
+      expect(Util.getElement(el)).toEqual(el)
+      expect(Util.getElement('#foo')).toEqual(el)
+      expect(Util.getElement('#fail')).toBeNull()
+      expect(Util.getElement({})).toBeNull()
+      expect(Util.getElement([])).toBeNull()
+      expect(Util.getElement()).toBeNull()
+      expect(Util.getElement(null)).toBeNull()
+      expect(Util.getElement(fixtureEl.querySelectorAll('.test'))).toBeNull()
+
+      const fakejQueryObject = {
+        0: el,
+        jquery: 'foo'
+      }
+
+      expect(Util.getElement(fakejQueryObject)).toEqual(el)
+    })
+  })
+
+  describe('isVisible', () => {
+    it('should return false if the element is not defined', () => {
+      expect(Util.isVisible(null)).toBeFalse()
+      expect(Util.isVisible(undefined)).toBeFalse()
+    })
+
+    it('should return false if the element provided is not a dom element', () => {
+      expect(Util.isVisible({})).toBeFalse()
+    })
+
+    it('should return false if the element is not visible with display none', () => {
+      fixtureEl.innerHTML = '<div style="display: none;"></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      expect(Util.isVisible(div)).toBeFalse()
+    })
+
+    it('should return false if the element is not visible with visibility hidden', () => {
+      fixtureEl.innerHTML = '<div style="visibility: hidden;"></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      expect(Util.isVisible(div)).toBeFalse()
+    })
+
+    it('should return false if an ancestor element is display none', () => {
+      fixtureEl.innerHTML = [
+        '<div style="display: none;">',
+        '  <div>',
+        '    <div>',
+        '      <div class="content"></div>',
+        '    </div>',
+        '  </div>',
+        '</div>'
+      ].join('')
+
+      const div = fixtureEl.querySelector('.content')
+
+      expect(Util.isVisible(div)).toBeFalse()
+    })
+
+    it('should return false if an ancestor element is visibility hidden', () => {
+      fixtureEl.innerHTML = [
+        '<div style="visibility: hidden;">',
+        '  <div>',
+        '    <div>',
+        '      <div class="content"></div>',
+        '    </div>',
+        '  </div>',
+        '</div>'
+      ].join('')
+
+      const div = fixtureEl.querySelector('.content')
+
+      expect(Util.isVisible(div)).toBeFalse()
+    })
+
+    it('should return true if an ancestor element is visibility hidden, but reverted', () => {
+      fixtureEl.innerHTML = [
+        '<div style="visibility: hidden;">',
+        '  <div style="visibility: visible;">',
+        '    <div>',
+        '      <div class="content"></div>',
+        '    </div>',
+        '  </div>',
+        '</div>'
+      ].join('')
+
+      const div = fixtureEl.querySelector('.content')
+
+      expect(Util.isVisible(div)).toBeTrue()
+    })
+
+    it('should return true if the element is visible', () => {
+      fixtureEl.innerHTML = [
+        '<div>',
+        '  <div id="element"></div>',
+        '</div>'
+      ].join('')
+
+      const div = fixtureEl.querySelector('#element')
+
+      expect(Util.isVisible(div)).toBeTrue()
+    })
+
+    it('should return false if the element is hidden, but not via display or visibility', () => {
+      fixtureEl.innerHTML = [
+        '<details>',
+        '  <div id="element"></div>',
+        '</details>'
+      ].join('')
+
+      const div = fixtureEl.querySelector('#element')
+
+      expect(Util.isVisible(div)).toBeFalse()
+    })
+
+    it('should return true if its a closed details element', () => {
+      fixtureEl.innerHTML = '<details id="element"></details>'
+
+      const div = fixtureEl.querySelector('#element')
+
+      expect(Util.isVisible(div)).toBeTrue()
+    })
+
+    it('should return true if the element is visible inside an open details element', () => {
+      fixtureEl.innerHTML = [
+        '<details open>',
+        '  <div id="element"></div>',
+        '</details>'
+      ].join('')
+
+      const div = fixtureEl.querySelector('#element')
+
+      expect(Util.isVisible(div)).toBeTrue()
+    })
+
+    it('should return true if the element is a visible summary in a closed details element', () => {
+      fixtureEl.innerHTML = [
+        '<details>',
+        '  <summary id="element-1">',
+        '    <span id="element-2"></span>',
+        '  </summary>',
+        '</details>'
+      ].join('')
+
+      const element1 = fixtureEl.querySelector('#element-1')
+      const element2 = fixtureEl.querySelector('#element-2')
+
+      expect(Util.isVisible(element1)).toBeTrue()
+      expect(Util.isVisible(element2)).toBeTrue()
+    })
+  })
+
+  describe('isDisabled', () => {
+    it('should return true if the element is not defined', () => {
+      expect(Util.isDisabled(null)).toBeTrue()
+      expect(Util.isDisabled(undefined)).toBeTrue()
+      expect(Util.isDisabled()).toBeTrue()
+    })
+
+    it('should return true if the element provided is not a dom element', () => {
+      expect(Util.isDisabled({})).toBeTrue()
+      expect(Util.isDisabled('test')).toBeTrue()
+    })
+
+    it('should return true if the element has disabled attribute', () => {
+      fixtureEl.innerHTML = [
+        '<div>',
+        '  <div id="element" disabled="disabled"></div>',
+        '  <div id="element1" disabled="true"></div>',
+        '  <div id="element2" disabled></div>',
+        '</div>'
+      ].join('')
+
+      const div = fixtureEl.querySelector('#element')
+      const div1 = fixtureEl.querySelector('#element1')
+      const div2 = fixtureEl.querySelector('#element2')
+
+      expect(Util.isDisabled(div)).toBeTrue()
+      expect(Util.isDisabled(div1)).toBeTrue()
+      expect(Util.isDisabled(div2)).toBeTrue()
+    })
+
+    it('should return false if the element has disabled attribute with "false" value, or doesn\'t have attribute', () => {
+      fixtureEl.innerHTML = [
+        '<div>',
+        '  <div id="element" disabled="false"></div>',
+        '  <div id="element1" ></div>',
+        '</div>'
+      ].join('')
+
+      const div = fixtureEl.querySelector('#element')
+      const div1 = fixtureEl.querySelector('#element1')
+
+      expect(Util.isDisabled(div)).toBeFalse()
+      expect(Util.isDisabled(div1)).toBeFalse()
+    })
+
+    it('should return false if the element is not disabled ', () => {
+      fixtureEl.innerHTML = [
+        '<div>',
+        '  <button id="button"></button>',
+        '  <select id="select"></select>',
+        '  <select id="input"></select>',
+        '</div>'
+      ].join('')
+
+      const el = selector => fixtureEl.querySelector(selector)
+
+      expect(Util.isDisabled(el('#button'))).toBeFalse()
+      expect(Util.isDisabled(el('#select'))).toBeFalse()
+      expect(Util.isDisabled(el('#input'))).toBeFalse()
+    })
+
+    it('should return true if the element has disabled attribute', () => {
+      fixtureEl.innerHTML = [
+        '<div>',
+        '  <input id="input" disabled="disabled">',
+        '  <input id="input1" disabled="disabled">',
+        '  <button id="button" disabled="true"></button>',
+        '  <button id="button1" disabled="disabled"></button>',
+        '  <button id="button2" disabled></button>',
+        '  <select id="select" disabled></select>',
+        '  <select id="input" disabled></select>',
+        '</div>'
+      ].join('')
+
+      const el = selector => fixtureEl.querySelector(selector)
+
+      expect(Util.isDisabled(el('#input'))).toBeTrue()
+      expect(Util.isDisabled(el('#input1'))).toBeTrue()
+      expect(Util.isDisabled(el('#button'))).toBeTrue()
+      expect(Util.isDisabled(el('#button1'))).toBeTrue()
+      expect(Util.isDisabled(el('#button2'))).toBeTrue()
+      expect(Util.isDisabled(el('#input'))).toBeTrue()
+    })
+
+    it('should return true if the element has class "disabled"', () => {
+      fixtureEl.innerHTML = [
+        '<div>',
+        '  <div id="element" class="disabled"></div>',
+        '</div>'
+      ].join('')
+
+      const div = fixtureEl.querySelector('#element')
+
+      expect(Util.isDisabled(div)).toBeTrue()
+    })
+
+    it('should return true if the element has class "disabled" but disabled attribute is false', () => {
+      fixtureEl.innerHTML = [
+        '<div>',
+        '  <input id="input" class="disabled" disabled="false">',
+        '</div>'
+      ].join('')
+
+      const div = fixtureEl.querySelector('#input')
+
+      expect(Util.isDisabled(div)).toBeTrue()
+    })
+  })
+
+  describe('findShadowRoot', () => {
+    it('should return null if shadow dom is not available', () => {
+      // Only for newer browsers
+      if (!document.documentElement.attachShadow) {
+        expect().nothing()
+        return
+      }
+
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      spyOn(document.documentElement, 'attachShadow').and.returnValue(null)
+
+      expect(Util.findShadowRoot(div)).toBeNull()
+    })
+
+    it('should return null when we do not find a shadow root', () => {
+      // Only for newer browsers
+      if (!document.documentElement.attachShadow) {
+        expect().nothing()
+        return
+      }
+
+      spyOn(document, 'getRootNode').and.returnValue(undefined)
+
+      expect(Util.findShadowRoot(document)).toBeNull()
+    })
+
+    it('should return the shadow root when found', () => {
+      // Only for newer browsers
+      if (!document.documentElement.attachShadow) {
+        expect().nothing()
+        return
+      }
+
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const shadowRoot = div.attachShadow({
+        mode: 'open'
+      })
+
+      expect(Util.findShadowRoot(shadowRoot)).toEqual(shadowRoot)
+
+      shadowRoot.innerHTML = '<button>Shadow Button</button>'
+
+      expect(Util.findShadowRoot(shadowRoot.firstChild)).toEqual(shadowRoot)
+    })
+  })
+
+  describe('noop', () => {
+    it('should be a function', () => {
+      expect(Util.noop).toEqual(jasmine.any(Function))
+    })
+  })
+
+  describe('reflow', () => {
+    it('should return element offset height to force the reflow', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const spy = spyOnProperty(div, 'offsetHeight')
+      Util.reflow(div)
+      expect(spy).toHaveBeenCalled()
+    })
+  })
+
+  describe('getjQuery', () => {
+    const fakejQuery = { trigger() {} }
+
+    beforeEach(() => {
+      Object.defineProperty(window, 'jQuery', {
+        value: fakejQuery,
+        writable: true
+      })
+    })
+
+    afterEach(() => {
+      window.jQuery = undefined
+    })
+
+    it('should return jQuery object when present', () => {
+      expect(Util.getjQuery()).toEqual(fakejQuery)
+    })
+
+    it('should not return jQuery object when present if data-bs-no-jquery', () => {
+      document.body.setAttribute('data-bs-no-jquery', '')
+
+      expect(window.jQuery).toEqual(fakejQuery)
+      expect(Util.getjQuery()).toBeNull()
+
+      document.body.removeAttribute('data-bs-no-jquery')
+    })
+
+    it('should not return jQuery if not present', () => {
+      window.jQuery = undefined
+      expect(Util.getjQuery()).toBeNull()
+    })
+  })
+
+  describe('onDOMContentLoaded', () => {
+    it('should execute callbacks when DOMContentLoaded is fired and should not add more than one listener', () => {
+      const spy = jasmine.createSpy()
+      const spy2 = jasmine.createSpy()
+
+      const spyAdd = spyOn(document, 'addEventListener').and.callThrough()
+      spyOnProperty(document, 'readyState').and.returnValue('loading')
+
+      Util.onDOMContentLoaded(spy)
+      Util.onDOMContentLoaded(spy2)
+
+      document.dispatchEvent(new Event('DOMContentLoaded', {
+        bubbles: true,
+        cancelable: true
+      }))
+
+      expect(spy).toHaveBeenCalled()
+      expect(spy2).toHaveBeenCalled()
+      expect(spyAdd).toHaveBeenCalledTimes(1)
+    })
+
+    it('should execute callback if readyState is not "loading"', () => {
+      const spy = jasmine.createSpy()
+      Util.onDOMContentLoaded(spy)
+      expect(spy).toHaveBeenCalled()
+    })
+  })
+
+  describe('defineJQueryPlugin', () => {
+    const fakejQuery = { fn: {} }
+
+    beforeEach(() => {
+      Object.defineProperty(window, 'jQuery', {
+        value: fakejQuery,
+        writable: true
+      })
+    })
+
+    afterEach(() => {
+      window.jQuery = undefined
+    })
+
+    it('should define a plugin on the jQuery instance', () => {
+      const pluginMock = Util.noop
+      pluginMock.NAME = 'test'
+      pluginMock.jQueryInterface = Util.noop
+
+      Util.defineJQueryPlugin(pluginMock)
+      expect(fakejQuery.fn.test).toEqual(pluginMock.jQueryInterface)
+      expect(fakejQuery.fn.test.Constructor).toEqual(pluginMock)
+      expect(fakejQuery.fn.test.noConflict).toEqual(jasmine.any(Function))
+    })
+  })
+
+  describe('execute', () => {
+    it('should execute if arg is function', () => {
+      const spy = jasmine.createSpy('spy')
+      Util.execute(spy)
+      expect(spy).toHaveBeenCalled()
+    })
+  })
+
+  describe('executeAfterTransition', () => {
+    it('should immediately execute a function when waitForTransition parameter is false', () => {
+      const el = document.createElement('div')
+      const callbackSpy = jasmine.createSpy('callback spy')
+      const eventListenerSpy = spyOn(el, 'addEventListener')
+
+      Util.executeAfterTransition(callbackSpy, el, false)
+
+      expect(callbackSpy).toHaveBeenCalled()
+      expect(eventListenerSpy).not.toHaveBeenCalled()
+    })
+
+    it('should execute a function when a transitionend event is dispatched', () => {
+      const el = document.createElement('div')
+      const callbackSpy = jasmine.createSpy('callback spy')
+
+      spyOn(window, 'getComputedStyle').and.returnValue({
+        transitionDuration: '0.05s',
+        transitionDelay: '0s'
+      })
+
+      Util.executeAfterTransition(callbackSpy, el)
+
+      el.dispatchEvent(new TransitionEvent('transitionend'))
+
+      expect(callbackSpy).toHaveBeenCalled()
+    })
+
+    it('should execute a function after a computed CSS transition duration and there was no transitionend event dispatched', () => {
+      return new Promise(resolve => {
+        const el = document.createElement('div')
+        const callbackSpy = jasmine.createSpy('callback spy')
+
+        spyOn(window, 'getComputedStyle').and.returnValue({
+          transitionDuration: '0.05s',
+          transitionDelay: '0s'
+        })
+
+        Util.executeAfterTransition(callbackSpy, el)
+
+        setTimeout(() => {
+          expect(callbackSpy).toHaveBeenCalled()
+          resolve()
+        }, 70)
+      })
+    })
+
+    it('should not execute a function a second time after a computed CSS transition duration and if a transitionend event has already been dispatched', () => {
+      return new Promise(resolve => {
+        const el = document.createElement('div')
+        const callbackSpy = jasmine.createSpy('callback spy')
+
+        spyOn(window, 'getComputedStyle').and.returnValue({
+          transitionDuration: '0.05s',
+          transitionDelay: '0s'
+        })
+
+        Util.executeAfterTransition(callbackSpy, el)
+
+        setTimeout(() => {
+          el.dispatchEvent(new TransitionEvent('transitionend'))
+        }, 50)
+
+        setTimeout(() => {
+          expect(callbackSpy).toHaveBeenCalledTimes(1)
+          resolve()
+        }, 70)
+      })
+    })
+
+    it('should not trigger a transitionend event if another transitionend event had already happened', () => {
+      return new Promise(resolve => {
+        const el = document.createElement('div')
+
+        spyOn(window, 'getComputedStyle').and.returnValue({
+          transitionDuration: '0.05s',
+          transitionDelay: '0s'
+        })
+
+        Util.executeAfterTransition(noop, el)
+
+        // simulate a event dispatched by the browser
+        el.dispatchEvent(new TransitionEvent('transitionend'))
+
+        const dispatchSpy = spyOn(el, 'dispatchEvent').and.callThrough()
+
+        setTimeout(() => {
+          // setTimeout should not have triggered another transitionend event.
+          expect(dispatchSpy).not.toHaveBeenCalled()
+          resolve()
+        }, 70)
+      })
+    })
+
+    it('should ignore transitionend events from nested elements', () => {
+      return new Promise(resolve => {
+        fixtureEl.innerHTML = [
+          '<div class="outer">',
+          '  <div class="nested"></div>',
+          '</div>'
+        ].join('')
+
+        const outer = fixtureEl.querySelector('.outer')
+        const nested = fixtureEl.querySelector('.nested')
+        const callbackSpy = jasmine.createSpy('callback spy')
+
+        spyOn(window, 'getComputedStyle').and.returnValue({
+          transitionDuration: '0.05s',
+          transitionDelay: '0s'
+        })
+
+        Util.executeAfterTransition(callbackSpy, outer)
+
+        nested.dispatchEvent(new TransitionEvent('transitionend', {
+          bubbles: true
+        }))
+
+        setTimeout(() => {
+          expect(callbackSpy).not.toHaveBeenCalled()
+        }, 20)
+
+        setTimeout(() => {
+          expect(callbackSpy).toHaveBeenCalled()
+          resolve()
+        }, 70)
+      })
+    })
+  })
+
+  describe('getNextActiveElement', () => {
+    it('should return first element if active not exists or not given and shouldGetNext is either true, or false with cycling being disabled', () => {
+      const array = ['a', 'b', 'c', 'd']
+
+      expect(Util.getNextActiveElement(array, '', true, true)).toEqual('a')
+      expect(Util.getNextActiveElement(array, 'g', true, true)).toEqual('a')
+      expect(Util.getNextActiveElement(array, '', true, false)).toEqual('a')
+      expect(Util.getNextActiveElement(array, 'g', true, false)).toEqual('a')
+      expect(Util.getNextActiveElement(array, '', false, false)).toEqual('a')
+      expect(Util.getNextActiveElement(array, 'g', false, false)).toEqual('a')
+    })
+
+    it('should return last element if active not exists or not given and shouldGetNext is false but cycling is enabled', () => {
+      const array = ['a', 'b', 'c', 'd']
+
+      expect(Util.getNextActiveElement(array, '', false, true)).toEqual('d')
+      expect(Util.getNextActiveElement(array, 'g', false, true)).toEqual('d')
+    })
+
+    it('should return next element or same if is last', () => {
+      const array = ['a', 'b', 'c', 'd']
+
+      expect(Util.getNextActiveElement(array, 'a', true, true)).toEqual('b')
+      expect(Util.getNextActiveElement(array, 'b', true, true)).toEqual('c')
+      expect(Util.getNextActiveElement(array, 'd', true, false)).toEqual('d')
+    })
+
+    it('should return next element or first, if is last and "isCycleAllowed = true"', () => {
+      const array = ['a', 'b', 'c', 'd']
+
+      expect(Util.getNextActiveElement(array, 'c', true, true)).toEqual('d')
+      expect(Util.getNextActiveElement(array, 'd', true, true)).toEqual('a')
+    })
+
+    it('should return previous element or same if is first', () => {
+      const array = ['a', 'b', 'c', 'd']
+
+      expect(Util.getNextActiveElement(array, 'b', false, true)).toEqual('a')
+      expect(Util.getNextActiveElement(array, 'd', false, true)).toEqual('c')
+      expect(Util.getNextActiveElement(array, 'a', false, false)).toEqual('a')
+    })
+
+    it('should return next element or first, if is last and "isCycleAllowed = true"', () => {
+      const array = ['a', 'b', 'c', 'd']
+
+      expect(Util.getNextActiveElement(array, 'd', false, true)).toEqual('c')
+      expect(Util.getNextActiveElement(array, 'a', false, true)).toEqual('d')
+    })
+  })
+})
diff --git a/js/tests/unit/util/sanitizer.spec.js b/js/tests/unit/util/sanitizer.spec.js
new file mode 100644
index 0000000..c656aed
--- /dev/null
+++ b/js/tests/unit/util/sanitizer.spec.js
@@ -0,0 +1,105 @@
+import { DefaultAllowlist, sanitizeHtml } from '../../../src/util/sanitizer'
+
+describe('Sanitizer', () => {
+  describe('sanitizeHtml', () => {
+    it('should return the same on empty string', () => {
+      const empty = ''
+
+      const result = sanitizeHtml(empty, DefaultAllowlist, null)
+
+      expect(result).toEqual(empty)
+    })
+
+    it('should sanitize template by removing tags with XSS', () => {
+      const template = [
+        '<div>',
+        '  <a href="javascript:alert(7)">Click me</a>',
+        '  <span>Some content</span>',
+        '</div>'
+      ].join('')
+
+      const result = sanitizeHtml(template, DefaultAllowlist, null)
+
+      expect(result).not.toContain('href="javascript:alert(7)')
+    })
+
+    it('should sanitize template and work with multiple regex', () => {
+      const template = [
+        '<div>',
+        '  <a href="javascript:alert(7)" aria-label="This is a link" data-foo="bar">Click me</a>',
+        '  <span>Some content</span>',
+        '</div>'
+      ].join('')
+
+      const myDefaultAllowList = DefaultAllowlist
+      // With the default allow list
+      let result = sanitizeHtml(template, myDefaultAllowList, null)
+
+      // `data-foo` won't be present
+      expect(result).not.toContain('data-foo="bar"')
+
+      // Add the following regex too
+      myDefaultAllowList['*'].push(/^data-foo/)
+
+      result = sanitizeHtml(template, myDefaultAllowList, null)
+
+      expect(result).not.toContain('href="javascript:alert(7)') // This is in the default list
+      expect(result).toContain('aria-label="This is a link"') // This is in the default list
+      expect(result).toContain('data-foo="bar"') // We explicitly allow this
+    })
+
+    it('should allow aria attributes and safe attributes', () => {
+      const template = [
+        '<div aria-pressed="true">',
+        '  <span class="test">Some content</span>',
+        '</div>'
+      ].join('')
+
+      const result = sanitizeHtml(template, DefaultAllowlist, null)
+
+      expect(result).toContain('aria-pressed')
+      expect(result).toContain('class="test"')
+    })
+
+    it('should remove tags not in allowlist', () => {
+      const template = [
+        '<div>',
+        '  <script>alert(7)</script>',
+        '</div>'
+      ].join('')
+
+      const result = sanitizeHtml(template, DefaultAllowlist, null)
+
+      expect(result).not.toContain('<script>')
+    })
+
+    it('should not use native api to sanitize if a custom function passed', () => {
+      const template = [
+        '<div>',
+        '  <span>Some content</span>',
+        '</div>'
+      ].join('')
+
+      function mySanitize(htmlUnsafe) {
+        return htmlUnsafe
+      }
+
+      const spy = spyOn(DOMParser.prototype, 'parseFromString')
+
+      const result = sanitizeHtml(template, DefaultAllowlist, mySanitize)
+
+      expect(result).toEqual(template)
+      expect(spy).not.toHaveBeenCalled()
+    })
+
+    it('should allow multiple sanitation passes of the same template', () => {
+      const template = '<img src="test.jpg">'
+
+      const firstResult = sanitizeHtml(template, DefaultAllowlist, null)
+      const secondResult = sanitizeHtml(template, DefaultAllowlist, null)
+
+      expect(firstResult).toContain('src')
+      expect(secondResult).toContain('src')
+    })
+  })
+})
diff --git a/js/tests/unit/util/scrollbar.spec.js b/js/tests/unit/util/scrollbar.spec.js
new file mode 100644
index 0000000..6fcf571
--- /dev/null
+++ b/js/tests/unit/util/scrollbar.spec.js
@@ -0,0 +1,363 @@
+import { clearBodyAndDocument, clearFixture, getFixture } from '../../helpers/fixture'
+import Manipulator from '../../../src/dom/manipulator'
+import ScrollBarHelper from '../../../src/util/scrollbar'
+
+describe('ScrollBar', () => {
+  let fixtureEl
+  const doc = document.documentElement
+  const parseIntDecimal = arg => Number.parseInt(arg, 10)
+  const getPaddingX = el => parseIntDecimal(window.getComputedStyle(el).paddingRight)
+  const getMarginX = el => parseIntDecimal(window.getComputedStyle(el).marginRight)
+  const getOverFlow = el => el.style.overflow
+  const getPaddingAttr = el => Manipulator.getDataAttribute(el, 'padding-right')
+  const getMarginAttr = el => Manipulator.getDataAttribute(el, 'margin-right')
+  const getOverFlowAttr = el => Manipulator.getDataAttribute(el, 'overflow')
+  const windowCalculations = () => {
+    return {
+      htmlClient: document.documentElement.clientWidth,
+      htmlOffset: document.documentElement.offsetWidth,
+      docClient: document.body.clientWidth,
+      htmlBound: document.documentElement.getBoundingClientRect().width,
+      bodyBound: document.body.getBoundingClientRect().width,
+      window: window.innerWidth,
+      width: Math.abs(window.innerWidth - document.documentElement.clientWidth)
+    }
+  }
+
+  // iOS, Android devices and macOS browsers hide scrollbar by default and show it only while scrolling.
+  // So the tests for scrollbar would fail
+  const isScrollBarHidden = () => {
+    const calc = windowCalculations()
+    return calc.htmlClient === calc.htmlOffset && calc.htmlClient === calc.window
+  }
+
+  beforeAll(() => {
+    fixtureEl = getFixture()
+    // custom fixture to avoid extreme style values
+    fixtureEl.removeAttribute('style')
+  })
+
+  afterAll(() => {
+    fixtureEl.remove()
+  })
+
+  afterEach(() => {
+    clearFixture()
+    clearBodyAndDocument()
+  })
+
+  beforeEach(() => {
+    clearBodyAndDocument()
+  })
+
+  describe('isBodyOverflowing', () => {
+    it('should return true if body is overflowing', () => {
+      document.documentElement.style.overflowY = 'scroll'
+      document.body.style.overflowY = 'scroll'
+      fixtureEl.innerHTML = '<div style="height: 110vh; width: 100%"></div>'
+      const result = new ScrollBarHelper().isOverflowing()
+
+      if (isScrollBarHidden()) {
+        expect(result).toBeFalse()
+      } else {
+        expect(result).toBeTrue()
+      }
+    })
+
+    it('should return false if body is not overflowing', () => {
+      doc.style.overflowY = 'hidden'
+      document.body.style.overflowY = 'hidden'
+      fixtureEl.innerHTML = '<div style="height: 110vh; width: 100%"></div>'
+      const scrollBar = new ScrollBarHelper()
+      const result = scrollBar.isOverflowing()
+
+      expect(result).toBeFalse()
+    })
+  })
+
+  describe('getWidth', () => {
+    it('should return an integer greater than zero, if body is overflowing', () => {
+      doc.style.overflowY = 'scroll'
+      document.body.style.overflowY = 'scroll'
+      fixtureEl.innerHTML = '<div style="height: 110vh; width: 100%"></div>'
+      const result = new ScrollBarHelper().getWidth()
+
+      if (isScrollBarHidden()) {
+        expect(result).toEqual(0)
+      } else {
+        expect(result).toBeGreaterThan(1)
+      }
+    })
+
+    it('should return 0 if body is not overflowing', () => {
+      document.documentElement.style.overflowY = 'hidden'
+      document.body.style.overflowY = 'hidden'
+      fixtureEl.innerHTML = '<div style="height: 110vh; width: 100%"></div>'
+
+      const result = new ScrollBarHelper().getWidth()
+
+      expect(result).toEqual(0)
+    })
+  })
+
+  describe('hide - reset', () => {
+    it('should adjust the inline padding of fixed elements which are full-width', () => {
+      fixtureEl.innerHTML = [
+        '<div style="height: 110vh; width: 100%">',
+        '  <div class="fixed-top" id="fixed1" style="padding-right: 0px; width: 100vw"></div>',
+        '  <div class="fixed-top" id="fixed2" style="padding-right: 5px; width: 100vw"></div>',
+        '</div>'
+      ].join('')
+      doc.style.overflowY = 'scroll'
+
+      const fixedEl = fixtureEl.querySelector('#fixed1')
+      const fixedEl2 = fixtureEl.querySelector('#fixed2')
+      const originalPadding = getPaddingX(fixedEl)
+      const originalPadding2 = getPaddingX(fixedEl2)
+      const scrollBar = new ScrollBarHelper()
+      const expectedPadding = originalPadding + scrollBar.getWidth()
+      const expectedPadding2 = originalPadding2 + scrollBar.getWidth()
+
+      scrollBar.hide()
+
+      let currentPadding = getPaddingX(fixedEl)
+      let currentPadding2 = getPaddingX(fixedEl2)
+      expect(getPaddingAttr(fixedEl)).toEqual(`${originalPadding}px`)
+      expect(getPaddingAttr(fixedEl2)).toEqual(`${originalPadding2}px`)
+      expect(currentPadding).toEqual(expectedPadding)
+      expect(currentPadding2).toEqual(expectedPadding2)
+
+      scrollBar.reset()
+      currentPadding = getPaddingX(fixedEl)
+      currentPadding2 = getPaddingX(fixedEl2)
+      expect(getPaddingAttr(fixedEl)).toBeNull()
+      expect(getPaddingAttr(fixedEl2)).toBeNull()
+      expect(currentPadding).toEqual(originalPadding)
+      expect(currentPadding2).toEqual(originalPadding2)
+    })
+
+    it('should remove padding & margin if not existed before adjustment', () => {
+      fixtureEl.innerHTML = [
+        '<div style="height: 110vh; width: 100%">',
+        '  <div class="fixed" id="fixed" style="width: 100vw;"></div>',
+        '  <div class="sticky-top" id="sticky" style=" width: 100vw;"></div>',
+        '</div>'
+      ].join('')
+      doc.style.overflowY = 'scroll'
+
+      const fixedEl = fixtureEl.querySelector('#fixed')
+      const stickyEl = fixtureEl.querySelector('#sticky')
+      const scrollBar = new ScrollBarHelper()
+
+      scrollBar.hide()
+      scrollBar.reset()
+
+      expect(fixedEl.getAttribute('style').includes('padding-right')).toBeFalse()
+      expect(stickyEl.getAttribute('style').includes('margin-right')).toBeFalse()
+    })
+
+    it('should adjust the inline margin and padding of sticky elements', () => {
+      fixtureEl.innerHTML = [
+        '<div style="height: 110vh">',
+        '  <div class="sticky-top" style="margin-right: 10px; padding-right: 20px; width: 100vw; height: 10px"></div>',
+        '</div>'
+      ].join('')
+      doc.style.overflowY = 'scroll'
+
+      const stickyTopEl = fixtureEl.querySelector('.sticky-top')
+      const originalMargin = getMarginX(stickyTopEl)
+      const originalPadding = getPaddingX(stickyTopEl)
+      const scrollBar = new ScrollBarHelper()
+      const expectedMargin = originalMargin - scrollBar.getWidth()
+      const expectedPadding = originalPadding + scrollBar.getWidth()
+      scrollBar.hide()
+
+      expect(getMarginAttr(stickyTopEl)).toEqual(`${originalMargin}px`)
+      expect(getMarginX(stickyTopEl)).toEqual(expectedMargin)
+      expect(getPaddingAttr(stickyTopEl)).toEqual(`${originalPadding}px`)
+      expect(getPaddingX(stickyTopEl)).toEqual(expectedPadding)
+
+      scrollBar.reset()
+      expect(getMarginAttr(stickyTopEl)).toBeNull()
+      expect(getMarginX(stickyTopEl)).toEqual(originalMargin)
+      expect(getPaddingAttr(stickyTopEl)).toBeNull()
+      expect(getPaddingX(stickyTopEl)).toEqual(originalPadding)
+    })
+
+    it('should not adjust the inline margin and padding of sticky and fixed elements when element do not have full width', () => {
+      fixtureEl.innerHTML = '<div class="sticky-top" style="margin-right: 0px; padding-right: 0px; width: 50vw"></div>'
+
+      const stickyTopEl = fixtureEl.querySelector('.sticky-top')
+      const originalMargin = getMarginX(stickyTopEl)
+      const originalPadding = getPaddingX(stickyTopEl)
+
+      const scrollBar = new ScrollBarHelper()
+      scrollBar.hide()
+
+      const currentMargin = getMarginX(stickyTopEl)
+      const currentPadding = getPaddingX(stickyTopEl)
+
+      expect(currentMargin).toEqual(originalMargin)
+      expect(currentPadding).toEqual(originalPadding)
+
+      scrollBar.reset()
+    })
+
+    it('should not put data-attribute if element doesn\'t have the proper style property, should just remove style property if element didn\'t had one', () => {
+      fixtureEl.innerHTML = [
+        '<div style="height: 110vh; width: 100%">',
+        '  <div class="sticky-top" id="sticky" style="width: 100vw"></div>',
+        '</div>'
+      ].join('')
+
+      document.body.style.overflowY = 'scroll'
+      const scrollBar = new ScrollBarHelper()
+
+      const hasPaddingAttr = el => el.hasAttribute('data-bs-padding-right')
+      const hasMarginAttr = el => el.hasAttribute('data-bs-margin-right')
+      const stickyEl = fixtureEl.querySelector('#sticky')
+      const originalPadding = getPaddingX(stickyEl)
+      const originalMargin = getMarginX(stickyEl)
+      const scrollBarWidth = scrollBar.getWidth()
+
+      scrollBar.hide()
+
+      expect(getPaddingX(stickyEl)).toEqual(scrollBarWidth + originalPadding)
+      const expectedMargin = scrollBarWidth + originalMargin
+      expect(getMarginX(stickyEl)).toEqual(expectedMargin === 0 ? expectedMargin : -expectedMargin)
+      expect(hasMarginAttr(stickyEl)).toBeFalse() // We do not have to keep css margin
+      expect(hasPaddingAttr(stickyEl)).toBeFalse() // We do not have to keep css padding
+
+      scrollBar.reset()
+
+      expect(getPaddingX(stickyEl)).toEqual(originalPadding)
+      expect(getPaddingX(stickyEl)).toEqual(originalPadding)
+    })
+
+    describe('Body Handling', () => {
+      it('should ignore other inline styles when trying to restore body defaults ', () => {
+        document.body.style.color = 'red'
+
+        const scrollBar = new ScrollBarHelper()
+        const scrollBarWidth = scrollBar.getWidth()
+        scrollBar.hide()
+
+        expect(getPaddingX(document.body)).toEqual(scrollBarWidth)
+        expect(document.body.style.color).toEqual('red')
+
+        scrollBar.reset()
+      })
+
+      it('should hide scrollbar and reset it to its initial value', () => {
+        const styleSheetPadding = '7px'
+        fixtureEl.innerHTML = [
+          '<style>',
+          '  body {',
+          `    padding-right: ${styleSheetPadding}`,
+          '  }',
+          '</style>'
+        ].join('')
+
+        const el = document.body
+        const inlineStylePadding = '10px'
+        el.style.paddingRight = inlineStylePadding
+
+        const originalPadding = getPaddingX(el)
+        expect(originalPadding).toEqual(parseIntDecimal(inlineStylePadding)) // Respect only the inline style as it has prevails this of css
+        const originalOverFlow = 'auto'
+        el.style.overflow = originalOverFlow
+        const scrollBar = new ScrollBarHelper()
+        const scrollBarWidth = scrollBar.getWidth()
+
+        scrollBar.hide()
+
+        const currentPadding = getPaddingX(el)
+
+        expect(currentPadding).toEqual(scrollBarWidth + originalPadding)
+        expect(currentPadding).toEqual(scrollBarWidth + parseIntDecimal(inlineStylePadding))
+        expect(getPaddingAttr(el)).toEqual(inlineStylePadding)
+        expect(getOverFlow(el)).toEqual('hidden')
+        expect(getOverFlowAttr(el)).toEqual(originalOverFlow)
+
+        scrollBar.reset()
+
+        const currentPadding1 = getPaddingX(el)
+        expect(currentPadding1).toEqual(originalPadding)
+        expect(getPaddingAttr(el)).toBeNull()
+        expect(getOverFlow(el)).toEqual(originalOverFlow)
+        expect(getOverFlowAttr(el)).toBeNull()
+      })
+
+      it('should hide scrollbar and reset it to its initial value - respecting css rules', () => {
+        const styleSheetPadding = '7px'
+        fixtureEl.innerHTML = [
+          '<style>',
+          '  body {',
+          `    padding-right: ${styleSheetPadding}`,
+          '  }',
+          '</style>'
+        ].join('')
+        const el = document.body
+        const originalPadding = getPaddingX(el)
+        const originalOverFlow = 'scroll'
+        el.style.overflow = originalOverFlow
+        const scrollBar = new ScrollBarHelper()
+        const scrollBarWidth = scrollBar.getWidth()
+
+        scrollBar.hide()
+
+        const currentPadding = getPaddingX(el)
+
+        expect(currentPadding).toEqual(scrollBarWidth + originalPadding)
+        expect(currentPadding).toEqual(scrollBarWidth + parseIntDecimal(styleSheetPadding))
+        expect(getPaddingAttr(el)).toBeNull() // We do not have to keep css padding
+        expect(getOverFlow(el)).toEqual('hidden')
+        expect(getOverFlowAttr(el)).toEqual(originalOverFlow)
+
+        scrollBar.reset()
+
+        const currentPadding1 = getPaddingX(el)
+        expect(currentPadding1).toEqual(originalPadding)
+        expect(getPaddingAttr(el)).toBeNull()
+        expect(getOverFlow(el)).toEqual(originalOverFlow)
+        expect(getOverFlowAttr(el)).toBeNull()
+      })
+
+      it('should not adjust the inline body padding when it does not overflow', () => {
+        const originalPadding = getPaddingX(document.body)
+        const scrollBar = new ScrollBarHelper()
+
+        // Hide scrollbars to prevent the body overflowing
+        doc.style.overflowY = 'hidden'
+        doc.style.paddingRight = '0px'
+
+        scrollBar.hide()
+        const currentPadding = getPaddingX(document.body)
+
+        expect(currentPadding).toEqual(originalPadding)
+        scrollBar.reset()
+      })
+
+      it('should not adjust the inline body padding when it does not overflow, even on a scaled display', () => {
+        const originalPadding = getPaddingX(document.body)
+        const scrollBar = new ScrollBarHelper()
+        // Remove body margins as would be done by Bootstrap css
+        document.body.style.margin = '0'
+
+        // Hide scrollbars to prevent the body overflowing
+        doc.style.overflowY = 'hidden'
+
+        // Simulate a discrepancy between exact, i.e. floating point body width, and rounded body width
+        // as it can occur when zooming or scaling the display to something else than 100%
+        doc.style.paddingRight = '.48px'
+        scrollBar.hide()
+
+        const currentPadding = getPaddingX(document.body)
+
+        expect(currentPadding).toEqual(originalPadding)
+
+        scrollBar.reset()
+      })
+    })
+  })
+})
diff --git a/js/tests/unit/util/swipe.spec.js b/js/tests/unit/util/swipe.spec.js
new file mode 100644
index 0000000..f92bb5d
--- /dev/null
+++ b/js/tests/unit/util/swipe.spec.js
@@ -0,0 +1,291 @@
+import { clearFixture, getFixture } from '../../helpers/fixture'
+import EventHandler from '../../../src/dom/event-handler'
+import Swipe from '../../../src/util/swipe'
+import { noop } from '../../../src/util'
+
+describe('Swipe', () => {
+  const { Simulator, PointerEvent } = window
+  const originWinPointerEvent = PointerEvent
+  const supportPointerEvent = Boolean(PointerEvent)
+
+  let fixtureEl
+  let swipeEl
+  const clearPointerEvents = () => {
+    window.PointerEvent = null
+  }
+
+  const restorePointerEvents = () => {
+    window.PointerEvent = originWinPointerEvent
+  }
+
+  // The headless browser does not support touch events, so we need to fake it
+  // in order to test that touch events are added properly
+  const defineDocumentElementOntouchstart = () => {
+    document.documentElement.ontouchstart = noop
+  }
+
+  const deleteDocumentElementOntouchstart = () => {
+    delete document.documentElement.ontouchstart
+  }
+
+  const mockSwipeGesture = (element, options = {}, type = 'touch') => {
+    Simulator.setType(type)
+    const _options = { deltaX: 0, deltaY: 0, ...options }
+
+    Simulator.gestures.swipe(element, _options)
+  }
+
+  beforeEach(() => {
+    fixtureEl = getFixture()
+    const cssStyle = [
+      '<style>',
+      '  #fixture .pointer-event {',
+      '    touch-action: pan-y;',
+      '  }',
+      '  #fixture div {',
+      '    width: 300px;',
+      '    height: 300px;',
+      '  }',
+      '</style>'
+    ].join('')
+
+    fixtureEl.innerHTML = `<div id="swipeEl"></div>${cssStyle}`
+    swipeEl = fixtureEl.querySelector('div')
+  })
+
+  afterEach(() => {
+    clearFixture()
+    deleteDocumentElementOntouchstart()
+  })
+
+  describe('constructor', () => {
+    it('should add touch event listeners by default', () => {
+      defineDocumentElementOntouchstart()
+
+      spyOn(Swipe.prototype, '_initEvents').and.callThrough()
+      const swipe = new Swipe(swipeEl)
+      expect(swipe._initEvents).toHaveBeenCalled()
+    })
+
+    it('should not add touch event listeners if touch is not supported', () => {
+      spyOn(Swipe, 'isSupported').and.returnValue(false)
+
+      spyOn(Swipe.prototype, '_initEvents').and.callThrough()
+      const swipe = new Swipe(swipeEl)
+
+      expect(swipe._initEvents).not.toHaveBeenCalled()
+    })
+  })
+
+  describe('Config', () => {
+    it('Test leftCallback', () => {
+      return new Promise(resolve => {
+        const spyRight = jasmine.createSpy('spy')
+        clearPointerEvents()
+        defineDocumentElementOntouchstart()
+        // eslint-disable-next-line no-new
+        new Swipe(swipeEl, {
+          leftCallback() {
+            expect(spyRight).not.toHaveBeenCalled()
+            restorePointerEvents()
+            resolve()
+          },
+          rightCallback: spyRight
+        })
+
+        mockSwipeGesture(swipeEl, {
+          pos: [300, 10],
+          deltaX: -300
+        })
+      })
+    })
+
+    it('Test rightCallback', () => {
+      return new Promise(resolve => {
+        const spyLeft = jasmine.createSpy('spy')
+        clearPointerEvents()
+        defineDocumentElementOntouchstart()
+        // eslint-disable-next-line no-new
+        new Swipe(swipeEl, {
+          rightCallback() {
+            expect(spyLeft).not.toHaveBeenCalled()
+            restorePointerEvents()
+            resolve()
+          },
+          leftCallback: spyLeft
+        })
+
+        mockSwipeGesture(swipeEl, {
+          pos: [10, 10],
+          deltaX: 300
+        })
+      })
+    })
+
+    it('Test endCallback', () => {
+      return new Promise(resolve => {
+        clearPointerEvents()
+        defineDocumentElementOntouchstart()
+        let isFirstTime = true
+
+        const callback = () => {
+          if (isFirstTime) {
+            isFirstTime = false
+            return
+          }
+
+          expect().nothing()
+          restorePointerEvents()
+          resolve()
+        }
+
+        // eslint-disable-next-line no-new
+        new Swipe(swipeEl, {
+          endCallback: callback
+        })
+        mockSwipeGesture(swipeEl, {
+          pos: [10, 10],
+          deltaX: 300
+        })
+
+        mockSwipeGesture(swipeEl, {
+          pos: [300, 10],
+          deltaX: -300
+        })
+      })
+    })
+  })
+
+  describe('Functionality on PointerEvents', () => {
+    it('should not allow pinch with touch events', () => {
+      Simulator.setType('touch')
+      clearPointerEvents()
+      deleteDocumentElementOntouchstart()
+
+      const swipe = new Swipe(swipeEl)
+      const spy = spyOn(swipe, '_handleSwipe')
+
+      mockSwipeGesture(swipeEl, {
+        pos: [300, 10],
+        deltaX: -300,
+        deltaY: 0,
+        touches: 2
+      })
+
+      restorePointerEvents()
+      expect(spy).not.toHaveBeenCalled()
+    })
+
+    it('should allow swipeRight and call "rightCallback" with pointer events', () => {
+      return new Promise(resolve => {
+        if (!supportPointerEvent) {
+          expect().nothing()
+          resolve()
+          return
+        }
+
+        const style = '#fixture .pointer-event { touch-action: none !important; }'
+        fixtureEl.innerHTML += style
+
+        defineDocumentElementOntouchstart()
+        // eslint-disable-next-line no-new
+        new Swipe(swipeEl, {
+          rightCallback() {
+            deleteDocumentElementOntouchstart()
+            expect().nothing()
+            resolve()
+          }
+        })
+
+        mockSwipeGesture(swipeEl, { deltaX: 300 }, 'pointer')
+      })
+    })
+
+    it('should allow swipeLeft and call "leftCallback" with pointer events', () => {
+      return new Promise(resolve => {
+        if (!supportPointerEvent) {
+          expect().nothing()
+          resolve()
+          return
+        }
+
+        const style = '#fixture .pointer-event { touch-action: none !important; }'
+        fixtureEl.innerHTML += style
+
+        defineDocumentElementOntouchstart()
+        // eslint-disable-next-line no-new
+        new Swipe(swipeEl, {
+          leftCallback() {
+            expect().nothing()
+            deleteDocumentElementOntouchstart()
+            resolve()
+          }
+        })
+
+        mockSwipeGesture(swipeEl, {
+          pos: [300, 10],
+          deltaX: -300
+        }, 'pointer')
+      })
+    })
+  })
+
+  describe('Dispose', () => {
+    it('should call EventHandler.off', () => {
+      defineDocumentElementOntouchstart()
+      spyOn(EventHandler, 'off').and.callThrough()
+      const swipe = new Swipe(swipeEl)
+
+      swipe.dispose()
+      expect(EventHandler.off).toHaveBeenCalledWith(swipeEl, '.bs.swipe')
+    })
+
+    it('should destroy', () => {
+      const addEventSpy = spyOn(fixtureEl, 'addEventListener').and.callThrough()
+      const removeEventSpy = spyOn(EventHandler, 'off').and.callThrough()
+      defineDocumentElementOntouchstart()
+
+      const swipe = new Swipe(fixtureEl)
+
+      const expectedArgs =
+        swipe._supportPointerEvents ?
+          [
+            ['pointerdown', jasmine.any(Function), jasmine.any(Boolean)],
+            ['pointerup', jasmine.any(Function), jasmine.any(Boolean)]
+          ] :
+          [
+            ['touchstart', jasmine.any(Function), jasmine.any(Boolean)],
+            ['touchmove', jasmine.any(Function), jasmine.any(Boolean)],
+            ['touchend', jasmine.any(Function), jasmine.any(Boolean)]
+          ]
+
+      expect(addEventSpy.calls.allArgs()).toEqual(expectedArgs)
+
+      swipe.dispose()
+
+      expect(removeEventSpy).toHaveBeenCalledWith(fixtureEl, '.bs.swipe')
+      deleteDocumentElementOntouchstart()
+    })
+  })
+
+  describe('"isSupported" static', () => {
+    it('should return "true" if "touchstart" exists in document element)', () => {
+      Object.defineProperty(window.navigator, 'maxTouchPoints', () => 0)
+      defineDocumentElementOntouchstart()
+
+      expect(Swipe.isSupported()).toBeTrue()
+    })
+
+    it('should return "false" if "touchstart" not exists in document element and "navigator.maxTouchPoints" are zero (0)', () => {
+      Object.defineProperty(window.navigator, 'maxTouchPoints', () => 0)
+      deleteDocumentElementOntouchstart()
+
+      if ('ontouchstart' in document.documentElement) {
+        expect().nothing()
+        return
+      }
+
+      expect(Swipe.isSupported()).toBeFalse()
+    })
+  })
+})
diff --git a/js/tests/unit/util/template-factory.spec.js b/js/tests/unit/util/template-factory.spec.js
new file mode 100644
index 0000000..5e5724c
--- /dev/null
+++ b/js/tests/unit/util/template-factory.spec.js
@@ -0,0 +1,306 @@
+import { clearFixture, getFixture } from '../../helpers/fixture'
+import TemplateFactory from '../../../src/util/template-factory'
+
+describe('TemplateFactory', () => {
+  let fixtureEl
+
+  beforeAll(() => {
+    fixtureEl = getFixture()
+  })
+
+  afterEach(() => {
+    clearFixture()
+  })
+
+  describe('NAME', () => {
+    it('should return plugin NAME', () => {
+      expect(TemplateFactory.NAME).toEqual('TemplateFactory')
+    })
+  })
+
+  describe('Default', () => {
+    it('should return plugin default config', () => {
+      expect(TemplateFactory.Default).toEqual(jasmine.any(Object))
+    })
+  })
+
+  describe('toHtml', () => {
+    describe('Sanitization', () => {
+      it('should use "sanitizeHtml" to sanitize template', () => {
+        const factory = new TemplateFactory({
+          sanitize: true,
+          template: '<div><a href="javascript:alert(7)">Click me</a></div>'
+        })
+        const spy = spyOn(factory, '_maybeSanitize').and.callThrough()
+
+        expect(factory.toHtml().innerHTML).not.toContain('href="javascript:alert(7)')
+        expect(spy).toHaveBeenCalled()
+      })
+
+      it('should not sanitize template', () => {
+        const factory = new TemplateFactory({
+          sanitize: false,
+          template: '<div><a href="javascript:alert(7)">Click me</a></div>'
+        })
+        const spy = spyOn(factory, '_maybeSanitize').and.callThrough()
+
+        expect(factory.toHtml().innerHTML).toContain('href="javascript:alert(7)')
+        expect(spy).toHaveBeenCalled()
+      })
+
+      it('should use "sanitizeHtml" to sanitize content', () => {
+        const factory = new TemplateFactory({
+          sanitize: true,
+          html: true,
+          template: '<div id="foo"></div>',
+          content: { '#foo': '<a href="javascript:alert(7)">Click me</a>' }
+        })
+        expect(factory.toHtml().innerHTML).not.toContain('href="javascript:alert(7)')
+      })
+
+      it('should not sanitize content', () => {
+        const factory = new TemplateFactory({
+          sanitize: false,
+          html: true,
+          template: '<div id="foo"></div>',
+          content: { '#foo': '<a href="javascript:alert(7)">Click me</a>' }
+        })
+        expect(factory.toHtml().innerHTML).toContain('href="javascript:alert(7)')
+      })
+
+      it('should sanitize content only if "config.html" is enabled', () => {
+        const factory = new TemplateFactory({
+          sanitize: true,
+          html: false,
+          template: '<div id="foo"></div>',
+          content: { '#foo': '<a href="javascript:alert(7)">Click me</a>' }
+        })
+        const spy = spyOn(factory, '_maybeSanitize').and.callThrough()
+
+        expect(spy).not.toHaveBeenCalled()
+      })
+    })
+
+    describe('Extra Class', () => {
+      it('should add extra class', () => {
+        const factory = new TemplateFactory({
+          extraClass: 'testClass'
+        })
+        expect(factory.toHtml()).toHaveClass('testClass')
+      })
+
+      it('should add extra classes', () => {
+        const factory = new TemplateFactory({
+          extraClass: 'testClass testClass2'
+        })
+        expect(factory.toHtml()).toHaveClass('testClass')
+        expect(factory.toHtml()).toHaveClass('testClass2')
+      })
+
+      it('should resolve class if function is given', () => {
+        const factory = new TemplateFactory({
+          extraClass(arg) {
+            expect(arg).toEqual(factory)
+            return 'testClass'
+          }
+        })
+
+        expect(factory.toHtml()).toHaveClass('testClass')
+      })
+    })
+  })
+
+  describe('Content', () => {
+    it('add simple text content', () => {
+      const template = [
+        '<div>',
+        '  <div class="foo"></div>',
+        '  <div class="foo2"></div>',
+        '</div>'
+      ].join('')
+
+      const factory = new TemplateFactory({
+        template,
+        content: {
+          '.foo': 'bar',
+          '.foo2': 'bar2'
+        }
+      })
+
+      const html = factory.toHtml()
+      expect(html.querySelector('.foo').textContent).toEqual('bar')
+      expect(html.querySelector('.foo2').textContent).toEqual('bar2')
+    })
+
+    it('should not fill template if selector not exists', () => {
+      const factory = new TemplateFactory({
+        sanitize: true,
+        html: true,
+        template: '<div id="foo"></div>',
+        content: { '#bar': 'test' }
+      })
+
+      expect(factory.toHtml().outerHTML).toEqual('<div id="foo"></div>')
+    })
+
+    it('should remove template selector, if content is null', () => {
+      const factory = new TemplateFactory({
+        sanitize: true,
+        html: true,
+        template: '<div><div id="foo"></div></div>',
+        content: { '#foo': null }
+      })
+
+      expect(factory.toHtml().outerHTML).toEqual('<div></div>')
+    })
+
+    it('should resolve content if is function', () => {
+      const factory = new TemplateFactory({
+        sanitize: true,
+        html: true,
+        template: '<div><div id="foo"></div></div>',
+        content: { '#foo': () => null }
+      })
+
+      expect(factory.toHtml().outerHTML).toEqual('<div></div>')
+    })
+
+    it('if content is element and "config.html=false", should put content\'s textContent', () => {
+      fixtureEl.innerHTML = '<div>foo<span>bar</span></div>'
+      const contentElement = fixtureEl.querySelector('div')
+
+      const factory = new TemplateFactory({
+        html: false,
+        template: '<div><div id="foo"></div></div>',
+        content: { '#foo': contentElement }
+      })
+
+      const fooEl = factory.toHtml().querySelector('#foo')
+      expect(fooEl.innerHTML).not.toEqual(contentElement.innerHTML)
+      expect(fooEl.textContent).toEqual(contentElement.textContent)
+      expect(fooEl.textContent).toEqual('foobar')
+    })
+
+    it('if content is element and "config.html=true", should put content\'s outerHtml as child', () => {
+      fixtureEl.innerHTML = '<div>foo<span>bar</span></div>'
+      const contentElement = fixtureEl.querySelector('div')
+
+      const factory = new TemplateFactory({
+        html: true,
+        template: '<div><div id="foo"></div></div>',
+        content: { '#foo': contentElement }
+      })
+
+      const fooEl = factory.toHtml().querySelector('#foo')
+      expect(fooEl.innerHTML).toEqual(contentElement.outerHTML)
+      expect(fooEl.textContent).toEqual(contentElement.textContent)
+    })
+  })
+
+  describe('getContent', () => {
+    it('should get content as array', () => {
+      const factory = new TemplateFactory({
+        content: {
+          '.foo': 'bar',
+          '.foo2': 'bar2'
+        }
+      })
+      expect(factory.getContent()).toEqual(['bar', 'bar2'])
+    })
+
+    it('should filter empties', () => {
+      const factory = new TemplateFactory({
+        content: {
+          '.foo': 'bar',
+          '.foo2': '',
+          '.foo3': null,
+          '.foo4': () => 2,
+          '.foo5': () => null
+        }
+      })
+      expect(factory.getContent()).toEqual(['bar', 2])
+    })
+  })
+
+  describe('hasContent', () => {
+    it('should return true, if it has', () => {
+      const factory = new TemplateFactory({
+        content: {
+          '.foo': 'bar',
+          '.foo2': 'bar2',
+          '.foo3': ''
+        }
+      })
+      expect(factory.hasContent()).toBeTrue()
+    })
+
+    it('should return false, if filtered content is empty', () => {
+      const factory = new TemplateFactory({
+        content: {
+          '.foo2': '',
+          '.foo3': null,
+          '.foo4': () => null
+        }
+      })
+      expect(factory.hasContent()).toBeFalse()
+    })
+  })
+
+  describe('changeContent', () => {
+    it('should change Content', () => {
+      const template = [
+        '<div>',
+        '  <div class="foo"></div>',
+        '  <div class="foo2"></div>',
+        '</div>'
+      ].join('')
+
+      const factory = new TemplateFactory({
+        template,
+        content: {
+          '.foo': 'bar',
+          '.foo2': 'bar2'
+        }
+      })
+
+      const html = selector => factory.toHtml().querySelector(selector).textContent
+      expect(html('.foo')).toEqual('bar')
+      expect(html('.foo2')).toEqual('bar2')
+      factory.changeContent({
+        '.foo': 'test',
+        '.foo2': 'test2'
+      })
+
+      expect(html('.foo')).toEqual('test')
+      expect(html('.foo2')).toEqual('test2')
+    })
+
+    it('should change only the given, content', () => {
+      const template = [
+        '<div>',
+        '  <div class="foo"></div>',
+        '  <div class="foo2"></div>',
+        '</div>'
+      ].join('')
+
+      const factory = new TemplateFactory({
+        template,
+        content: {
+          '.foo': 'bar',
+          '.foo2': 'bar2'
+        }
+      })
+
+      const html = selector => factory.toHtml().querySelector(selector).textContent
+      expect(html('.foo')).toEqual('bar')
+      expect(html('.foo2')).toEqual('bar2')
+      factory.changeContent({
+        '.foo': 'test',
+        '.wrong': 'wrong'
+      })
+
+      expect(html('.foo')).toEqual('test')
+      expect(html('.foo2')).toEqual('bar2')
+    })
+  })
+})
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