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