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211 lines
6.4 KiB
JavaScript
211 lines
6.4 KiB
JavaScript
import FocusTrap from '../../../src/util/focustrap'
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import EventHandler from '../../../src/dom/event-handler'
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import SelectorEngine from '../../../src/dom/selector-engine'
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import { clearFixture, getFixture, createEvent } from '../../helpers/fixture'
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describe('FocusTrap', () => {
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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('activate', () => {
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it('should autofocus itself by default', () => {
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fixtureEl.innerHTML = '<div id="focustrap" tabindex="-1"></div>'
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const trapElement = fixtureEl.querySelector('div')
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spyOn(trapElement, 'focus')
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const focustrap = new FocusTrap({ trapElement })
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focustrap.activate()
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expect(trapElement.focus).toHaveBeenCalled()
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})
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it('if configured not to autofocus, should not autofocus itself', () => {
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fixtureEl.innerHTML = '<div id="focustrap" tabindex="-1"></div>'
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const trapElement = fixtureEl.querySelector('div')
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spyOn(trapElement, 'focus')
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const focustrap = new FocusTrap({ trapElement, autofocus: false })
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focustrap.activate()
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expect(trapElement.focus).not.toHaveBeenCalled()
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})
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it('should force focus inside focus trap if it can', done => {
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fixtureEl.innerHTML = [
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'<a href="#" id="outside">outside</a>',
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'<div id="focustrap" tabindex="-1">',
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' <a href="#" id="inside">inside</a>',
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'</div>'
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].join('')
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const trapElement = fixtureEl.querySelector('div')
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const focustrap = new FocusTrap({ trapElement })
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focustrap.activate()
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const inside = document.getElementById('inside')
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const focusInListener = () => {
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expect(inside.focus).toHaveBeenCalled()
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document.removeEventListener('focusin', focusInListener)
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done()
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}
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spyOn(inside, 'focus')
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spyOn(SelectorEngine, 'focusableChildren').and.callFake(() => [inside])
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document.addEventListener('focusin', focusInListener)
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const focusInEvent = createEvent('focusin', { bubbles: true })
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Object.defineProperty(focusInEvent, 'target', {
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value: document.getElementById('outside')
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})
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document.dispatchEvent(focusInEvent)
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})
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it('should wrap focus around forward on tab', done => {
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fixtureEl.innerHTML = [
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'<a href="#" id="outside">outside</a>',
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'<div id="focustrap" tabindex="-1">',
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' <a href="#" id="first">first</a>',
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' <a href="#" id="inside">inside</a>',
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' <a href="#" id="last">last</a>',
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'</div>'
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].join('')
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const trapElement = fixtureEl.querySelector('div')
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const focustrap = new FocusTrap({ trapElement })
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focustrap.activate()
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const first = document.getElementById('first')
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const inside = document.getElementById('inside')
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const last = document.getElementById('last')
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const outside = document.getElementById('outside')
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spyOn(SelectorEngine, 'focusableChildren').and.callFake(() => [first, inside, last])
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spyOn(first, 'focus').and.callThrough()
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const focusInListener = () => {
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expect(first.focus).toHaveBeenCalled()
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first.removeEventListener('focusin', focusInListener)
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done()
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}
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first.addEventListener('focusin', focusInListener)
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const keydown = createEvent('keydown')
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keydown.key = 'Tab'
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document.dispatchEvent(keydown)
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outside.focus()
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})
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it('should wrap focus around backwards on shift-tab', done => {
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fixtureEl.innerHTML = [
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'<a href="#" id="outside">outside</a>',
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'<div id="focustrap" tabindex="-1">',
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' <a href="#" id="first">first</a>',
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' <a href="#" id="inside">inside</a>',
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' <a href="#" id="last">last</a>',
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'</div>'
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].join('')
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const trapElement = fixtureEl.querySelector('div')
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const focustrap = new FocusTrap({ trapElement })
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focustrap.activate()
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const first = document.getElementById('first')
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const inside = document.getElementById('inside')
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const last = document.getElementById('last')
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const outside = document.getElementById('outside')
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spyOn(SelectorEngine, 'focusableChildren').and.callFake(() => [first, inside, last])
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spyOn(last, 'focus').and.callThrough()
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const focusInListener = () => {
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expect(last.focus).toHaveBeenCalled()
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last.removeEventListener('focusin', focusInListener)
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done()
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}
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last.addEventListener('focusin', focusInListener)
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const keydown = createEvent('keydown')
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keydown.key = 'Tab'
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keydown.shiftKey = true
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document.dispatchEvent(keydown)
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outside.focus()
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})
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it('should force focus on itself if there is no focusable content', done => {
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fixtureEl.innerHTML = [
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'<a href="#" id="outside">outside</a>',
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'<div id="focustrap" tabindex="-1"></div>'
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].join('')
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const trapElement = fixtureEl.querySelector('div')
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const focustrap = new FocusTrap({ trapElement })
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focustrap.activate()
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const focusInListener = () => {
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expect(focustrap._config.trapElement.focus).toHaveBeenCalled()
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document.removeEventListener('focusin', focusInListener)
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done()
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}
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spyOn(focustrap._config.trapElement, 'focus')
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document.addEventListener('focusin', focusInListener)
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const focusInEvent = createEvent('focusin', { bubbles: true })
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Object.defineProperty(focusInEvent, 'target', {
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value: document.getElementById('outside')
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})
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document.dispatchEvent(focusInEvent)
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})
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})
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describe('deactivate', () => {
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it('should flag itself as no longer active', () => {
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const focustrap = new FocusTrap({ trapElement: fixtureEl })
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focustrap.activate()
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expect(focustrap._isActive).toBeTrue()
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focustrap.deactivate()
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expect(focustrap._isActive).toBeFalse()
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})
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it('should remove all event listeners', () => {
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const focustrap = new FocusTrap({ trapElement: fixtureEl })
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focustrap.activate()
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spyOn(EventHandler, 'off')
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focustrap.deactivate()
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expect(EventHandler.off).toHaveBeenCalled()
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})
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it('doesn\'t try removing event listeners unless it needs to (in case it hasn\'t been activated)', () => {
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const focustrap = new FocusTrap({ trapElement: fixtureEl })
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spyOn(EventHandler, 'off')
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focustrap.deactivate()
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expect(EventHandler.off).not.toHaveBeenCalled()
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})
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})
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})
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