Rename "js/tests/units" to "js/tests/unit". (#29503)

js/tests/unit/dom/event-handler.spec.js

@@ -0,0 +1,327 @@
+import EventHandler from '../../../src/dom/event-handler'
+
+/** Test helpers */
+import { getFixture, clearFixture } from '../../helpers/fixture'
+
+describe('EventHandler', () => {
+  let fixtureEl
+
+  beforeAll(() => {
+    fixtureEl = getFixture()
+  })
+
+  afterEach(() => {
+    clearFixture()
+  })
+
+  describe('on', () => {
+    it('should not add event listener if the event is not a string', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      EventHandler.on(div, null, () => {})
+      EventHandler.on(null, 'click', () => {})
+
+      expect().nothing()
+    })
+
+    it('should add event listener', done => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      EventHandler.on(div, 'click', () => {
+        expect().nothing()
+        done()
+      })
+
+      div.click()
+    })
+
+    it('should add namespaced event listener', done => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      EventHandler.on(div, 'bs.namespace', () => {
+        expect().nothing()
+        done()
+      })
+
+      EventHandler.trigger(div, 'bs.namespace')
+    })
+
+    it('should add native namespaced event listener', done => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      EventHandler.on(div, 'click.namespace', () => {
+        expect().nothing()
+        done()
+      })
+
+      EventHandler.trigger(div, 'click')
+    })
+
+    it('should handle event delegation', done => {
+      EventHandler.on(document, 'click', '.test', () => {
+        expect().nothing()
+        done()
+      })
+
+      fixtureEl.innerHTML = '<div class="test"></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      div.click()
+    })
+  })
+
+  describe('one', () => {
+    it('should call listener just one', done => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      let called = 0
+      const div = fixtureEl.querySelector('div')
+      const obj = {
+        oneListener() {
+          called++
+        }
+      }
+
+      EventHandler.one(div, 'bootstrap', obj.oneListener)
+
+      EventHandler.trigger(div, 'bootstrap')
+      EventHandler.trigger(div, 'bootstrap')
+
+      setTimeout(() => {
+        expect(called).toEqual(1)
+        done()
+      }, 20)
+    })
+  })
+
+  describe('off', () => {
+    it('should not remove a listener', () => {
+      fixtureEl.innerHTML = '<div></div>'
+      const div = fixtureEl.querySelector('div')
+
+      EventHandler.off(div, null, () => {})
+      EventHandler.off(null, 'click', () => {})
+      expect().nothing()
+    })
+
+    it('should remove a listener', done => {
+      fixtureEl.innerHTML = '<div></div>'
+      const div = fixtureEl.querySelector('div')
+
+      let called = 0
+      const handler = () => {
+        called++
+      }
+
+      EventHandler.on(div, 'foobar', handler)
+      EventHandler.trigger(div, 'foobar')
+
+      EventHandler.off(div, 'foobar', handler)
+      EventHandler.trigger(div, 'foobar')
+
+      setTimeout(() => {
+        expect(called).toEqual(1)
+        done()
+      }, 20)
+    })
+
+    it('should remove all the events', done => {
+      fixtureEl.innerHTML = '<div></div>'
+      const div = fixtureEl.querySelector('div')
+
+      let called = 0
+
+      EventHandler.on(div, 'foobar', () => {
+        called++
+      })
+      EventHandler.on(div, 'foobar', () => {
+        called++
+      })
+      EventHandler.trigger(div, 'foobar')
+
+      EventHandler.off(div, 'foobar')
+      EventHandler.trigger(div, 'foobar')
+
+      setTimeout(() => {
+        expect(called).toEqual(2)
+        done()
+      }, 20)
+    })
+
+    it('should remove all the namespaced listeners if namespace is passed', done => {
+      fixtureEl.innerHTML = '<div></div>'
+      const div = fixtureEl.querySelector('div')
+
+      let called = 0
+
+      EventHandler.on(div, 'foobar.namespace', () => {
+        called++
+      })
+      EventHandler.on(div, 'foofoo.namespace', () => {
+        called++
+      })
+      EventHandler.trigger(div, 'foobar.namespace')
+      EventHandler.trigger(div, 'foofoo.namespace')
+
+      EventHandler.off(div, '.namespace')
+      EventHandler.trigger(div, 'foobar.namespace')
+      EventHandler.trigger(div, 'foofoo.namespace')
+
+      setTimeout(() => {
+        expect(called).toEqual(2)
+        done()
+      }, 20)
+    })
+
+    it('should remove the namespaced listeners', done => {
+      fixtureEl.innerHTML = '<div></div>'
+      const div = fixtureEl.querySelector('div')
+
+      let calledCallback1 = 0
+      let calledCallback2 = 0
+
+      EventHandler.on(div, 'foobar.namespace', () => {
+        calledCallback1++
+      })
+      EventHandler.on(div, 'foofoo.namespace', () => {
+        calledCallback2++
+      })
+
+      EventHandler.trigger(div, 'foobar.namespace')
+      EventHandler.off(div, 'foobar.namespace')
+      EventHandler.trigger(div, 'foobar.namespace')
+
+      EventHandler.trigger(div, 'foofoo.namespace')
+
+      setTimeout(() => {
+        expect(calledCallback1).toEqual(1)
+        expect(calledCallback2).toEqual(1)
+        done()
+      }, 20)
+    })
+
+    it('should remove the all the namespaced listeners for native events', done => {
+      fixtureEl.innerHTML = '<div></div>'
+      const div = fixtureEl.querySelector('div')
+
+      let called = 0
+
+      EventHandler.on(div, 'click.namespace', () => {
+        called++
+      })
+      EventHandler.on(div, 'click.namespace2', () => {
+        called++
+      })
+
+      EventHandler.trigger(div, 'click')
+      EventHandler.off(div, 'click')
+      EventHandler.trigger(div, 'click')
+
+      setTimeout(() => {
+        expect(called).toEqual(2)
+        done()
+      }, 20)
+    })
+
+    it('should remove the specified namespaced listeners for native events', done => {
+      fixtureEl.innerHTML = '<div></div>'
+      const div = fixtureEl.querySelector('div')
+
+      let called1 = 0
+      let called2 = 0
+
+      EventHandler.on(div, 'click.namespace', () => {
+        called1++
+      })
+      EventHandler.on(div, 'click.namespace2', () => {
+        called2++
+      })
+      EventHandler.trigger(div, 'click')
+
+      EventHandler.off(div, 'click.namespace')
+      EventHandler.trigger(div, 'click')
+
+      setTimeout(() => {
+        expect(called1).toEqual(1)
+        expect(called2).toEqual(2)
+        done()
+      }, 20)
+    })
+
+    it('should remove a listener registered by .one', done => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const handler = () => {
+        throw new Error('called')
+      }
+
+      EventHandler.one(div, 'foobar', handler)
+      EventHandler.off(div, 'foobar', handler)
+
+      EventHandler.trigger(div, 'foobar')
+      setTimeout(() => {
+        expect().nothing()
+        done()
+      }, 20)
+    })
+
+    it('should remove the correct delegated event listener', () => {
+      const element = document.createElement('div')
+      const subelement = document.createElement('span')
+      element.appendChild(subelement)
+
+      const anchor = document.createElement('a')
+      element.appendChild(anchor)
+
+      let i = 0
+      const handler = () => {
+        i++
+      }
+
+      EventHandler.on(element, 'click', 'a', handler)
+      EventHandler.on(element, 'click', 'span', handler)
+
+      fixtureEl.appendChild(element)
+
+      EventHandler.trigger(anchor, 'click')
+      EventHandler.trigger(subelement, 'click')
+
+      // first listeners called
+      expect(i === 2).toEqual(true)
+
+      EventHandler.off(element, 'click', 'span', handler)
+      EventHandler.trigger(subelement, 'click')
+
+      // removed listener not called
+      expect(i === 2).toEqual(true)
+
+      EventHandler.trigger(anchor, 'click')
+
+      // not removed listener called
+      expect(i === 3).toEqual(true)
+
+      EventHandler.on(element, 'click', 'span', handler)
+      EventHandler.trigger(anchor, 'click')
+      EventHandler.trigger(subelement, 'click')
+
+      // listener re-registered
+      expect(i === 5).toEqual(true)
+
+      EventHandler.off(element, 'click', 'span')
+      EventHandler.trigger(subelement, 'click')
+
+      // listener removed again
+      expect(i === 5).toEqual(true)
+    })
+  })
+})