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- import ScrollSpy from '../../src/scrollspy'
- import Manipulator from '../../src/dom/manipulator'
- import { getFixture, clearFixture, createEvent, jQueryMock } from '../helpers/fixture'
- describe('ScrollSpy', () => {
- let fixtureEl
- const testElementIsActiveAfterScroll = ({ elementSelector, targetSelector, contentEl, scrollSpy, spy, cb }) => {
- const element = fixtureEl.querySelector(elementSelector)
- const target = fixtureEl.querySelector(targetSelector)
-
- const paddingTop = 5
- const scrollHeight = Math.ceil(contentEl.scrollTop + Manipulator.position(target).top) + paddingTop
- function listener() {
- expect(element.classList.contains('active')).toEqual(true)
- contentEl.removeEventListener('scroll', listener)
- expect(scrollSpy._process).toHaveBeenCalled()
- spy.calls.reset()
- cb()
- }
- contentEl.addEventListener('scroll', listener)
- contentEl.scrollTop = scrollHeight
- }
- beforeAll(() => {
- fixtureEl = getFixture()
- })
- afterEach(() => {
- clearFixture()
- })
- describe('VERSION', () => {
- it('should return plugin version', () => {
- expect(ScrollSpy.VERSION).toEqual(jasmine.any(String))
- })
- })
- describe('Default', () => {
- it('should return plugin default config', () => {
- expect(ScrollSpy.Default).toEqual(jasmine.any(Object))
- })
- })
- describe('DATA_KEY', () => {
- it('should return plugin data key', () => {
- expect(ScrollSpy.DATA_KEY).toEqual('bs.scrollspy')
- })
- })
- describe('constructor', () => {
- it('should take care of element either passed as a CSS selector or DOM element', () => {
- fixtureEl.innerHTML = '<nav id="navigation"></nav><div class="content"></div>'
- const sSpyEl = fixtureEl.querySelector('#navigation')
- const sSpyBySelector = new ScrollSpy('#navigation')
- const sSpyByElement = new ScrollSpy(sSpyEl)
- expect(sSpyBySelector._element).toEqual(sSpyEl)
- expect(sSpyByElement._element).toEqual(sSpyEl)
- })
- it('should generate an id when there is not one', () => {
- fixtureEl.innerHTML = [
- '<nav></nav>',
- '<div class="content"></div>'
- ].join('')
- const navEl = fixtureEl.querySelector('nav')
- const scrollSpy = new ScrollSpy(fixtureEl.querySelector('.content'), {
- target: navEl
- })
- expect(scrollSpy).toBeDefined()
- expect(navEl.getAttribute('id')).not.toEqual(null)
- })
- it('should not process element without target', () => {
- fixtureEl.innerHTML = [
- '<nav id="navigation" class="navbar">',
- ' <ul class="navbar-nav">',
- ' <li class="nav-item"><a class="nav-link active" id="one-link" href="#">One</a></li>',
- ' <li class="nav-item"><a class="nav-link" id="two-link" href="#two">Two</a></li>',
- ' <li class="nav-item"><a class="nav-link" id="three-link" href="#three">Three</a></li>',
- ' </ul>',
- '</nav>',
- '<div id="content" style="height: 200px; overflow-y: auto;">',
- ' <div id="two" style="height: 300px;"></div>',
- ' <div id="three" style="height: 10px;"></div>',
- '</div>'
- ].join('')
- const scrollSpy = new ScrollSpy(fixtureEl.querySelector('#content'), {
- target: '#navigation'
- })
- expect(scrollSpy._targets.length).toEqual(2)
- })
- it('should only switch "active" class on current target', done => {
- fixtureEl.innerHTML = [
- '<div id="root" class="active" style="display: block">',
- ' <div class="topbar">',
- ' <div class="topbar-inner">',
- ' <div class="container" id="ss-target">',
- ' <ul class="nav">',
- ' <li class="nav-item"><a href="#masthead">Overview</a></li>',
- ' <li class="nav-item"><a href="#detail">Detail</a></li>',
- ' </ul>',
- ' </div>',
- ' </div>',
- ' </div>',
- ' <div id="scrollspy-example" style="height: 100px; overflow: auto;">',
- ' <div style="height: 200px;">',
- ' <h4 id="masthead">Overview</h4>',
- ' <p style="height: 200px;"></p>',
- ' </div>',
- ' <div style="height: 200px;">',
- ' <h4 id="detail">Detail</h4>',
- ' <p style="height: 200px;"></p>',
- ' </div>',
- ' </div>',
- '</div>'
- ].join('')
- const scrollSpyEl = fixtureEl.querySelector('#scrollspy-example')
- const rootEl = fixtureEl.querySelector('#root')
- const scrollSpy = new ScrollSpy(scrollSpyEl, {
- target: 'ss-target'
- })
- spyOn(scrollSpy, '_process').and.callThrough()
- scrollSpyEl.addEventListener('scroll', () => {
- expect(rootEl.classList.contains('active')).toEqual(true)
- expect(scrollSpy._process).toHaveBeenCalled()
- done()
- })
- scrollSpyEl.scrollTop = 350
- })
- it('should only switch "active" class on current target specified w element', done => {
- fixtureEl.innerHTML = [
- '<div id="root" class="active" style="display: block">',
- ' <div class="topbar">',
- ' <div class="topbar-inner">',
- ' <div class="container" id="ss-target">',
- ' <ul class="nav">',
- ' <li class="nav-item"><a href="#masthead">Overview</a></li>',
- ' <li class="nav-item"><a href="#detail">Detail</a></li>',
- ' </ul>',
- ' </div>',
- ' </div>',
- ' </div>',
- ' <div id="scrollspy-example" style="height: 100px; overflow: auto;">',
- ' <div style="height: 200px;">',
- ' <h4 id="masthead">Overview</h4>',
- ' <p style="height: 200px;"></p>',
- ' </div>',
- ' <div style="height: 200px;">',
- ' <h4 id="detail">Detail</h4>',
- ' <p style="height: 200px;"></p>',
- ' </div>',
- ' </div>',
- '</div>'
- ].join('')
- const scrollSpyEl = fixtureEl.querySelector('#scrollspy-example')
- const rootEl = fixtureEl.querySelector('#root')
- const scrollSpy = new ScrollSpy(scrollSpyEl, {
- target: fixtureEl.querySelector('#ss-target')
- })
- spyOn(scrollSpy, '_process').and.callThrough()
- scrollSpyEl.addEventListener('scroll', () => {
- expect(rootEl.classList.contains('active')).toEqual(true)
- expect(scrollSpy._process).toHaveBeenCalled()
- done()
- })
- scrollSpyEl.scrollTop = 350
- })
- it('should correctly select middle navigation option when large offset is used', done => {
- fixtureEl.innerHTML = [
- '<div id="header" style="height: 500px;"></div>',
- '<nav id="navigation" class="navbar">',
- ' <ul class="navbar-nav">',
- ' <li class="nav-item"><a class="nav-link active" id="one-link" href="#one">One</a></li>',
- ' <li class="nav-item"><a class="nav-link" id="two-link" href="#two">Two</a></li>',
- ' <li class="nav-item"><a class="nav-link" id="three-link" href="#three">Three</a></li>',
- ' </ul>',
- '</nav>',
- '<div id="content" style="height: 200px; overflow-y: auto;">',
- ' <div id="one" style="height: 500px;"></div>',
- ' <div id="two" style="height: 300px;"></div>',
- ' <div id="three" style="height: 10px;"></div>',
- '</div>'
- ].join('')
- const contentEl = fixtureEl.querySelector('#content')
- const scrollSpy = new ScrollSpy(contentEl, {
- target: '#navigation',
- offset: Manipulator.position(contentEl).top
- })
- spyOn(scrollSpy, '_process').and.callThrough()
- contentEl.addEventListener('scroll', () => {
- expect(fixtureEl.querySelector('#one-link').classList.contains('active')).toEqual(false)
- expect(fixtureEl.querySelector('#two-link').classList.contains('active')).toEqual(true)
- expect(fixtureEl.querySelector('#three-link').classList.contains('active')).toEqual(false)
- expect(scrollSpy._process).toHaveBeenCalled()
- done()
- })
- contentEl.scrollTop = 550
- })
- it('should add the active class to the correct element', done => {
- fixtureEl.innerHTML = [
- '<nav class="navbar">',
- ' <ul class="nav">',
- ' <li class="nav-item"><a class="nav-link" id="a-1" href="#div-1">div 1</a></li>',
- ' <li class="nav-item"><a class="nav-link" id="a-2" href="#div-2">div 2</a></li>',
- ' </ul>',
- '</nav>',
- '<div class="content" style="overflow: auto; height: 50px">',
- ' <div id="div-1" style="height: 100px; padding: 0; margin: 0">div 1</div>',
- ' <div id="div-2" style="height: 200px; padding: 0; margin: 0">div 2</div>',
- '</div>'
- ].join('')
- const contentEl = fixtureEl.querySelector('.content')
- const scrollSpy = new ScrollSpy(contentEl, {
- offset: 0,
- target: '.navbar'
- })
- const spy = spyOn(scrollSpy, '_process').and.callThrough()
- testElementIsActiveAfterScroll({
- elementSelector: '#a-1',
- targetSelector: '#div-1',
- contentEl,
- scrollSpy,
- spy,
- cb: () => {
- testElementIsActiveAfterScroll({
- elementSelector: '#a-2',
- targetSelector: '#div-2',
- contentEl,
- scrollSpy,
- spy,
- cb: () => done()
- })
- }
- })
- })
- it('should add the active class to the correct element (nav markup)', done => {
- fixtureEl.innerHTML = [
- '<nav class="navbar">',
- ' <nav class="nav">',
- ' <a class="nav-link" id="a-1" href="#div-1">div 1</a>',
- ' <a class="nav-link" id="a-2" href="#div-2">div 2</a>',
- ' </nav>',
- '</nav>',
- '<div class="content" style="overflow: auto; height: 50px">',
- ' <div id="div-1" style="height: 100px; padding: 0; margin: 0">div 1</div>',
- ' <div id="div-2" style="height: 200px; padding: 0; margin: 0">div 2</div>',
- '</div>'
- ].join('')
- const contentEl = fixtureEl.querySelector('.content')
- const scrollSpy = new ScrollSpy(contentEl, {
- offset: 0,
- target: '.navbar'
- })
- const spy = spyOn(scrollSpy, '_process').and.callThrough()
- testElementIsActiveAfterScroll({
- elementSelector: '#a-1',
- targetSelector: '#div-1',
- contentEl,
- scrollSpy,
- spy,
- cb: () => {
- testElementIsActiveAfterScroll({
- elementSelector: '#a-2',
- targetSelector: '#div-2',
- contentEl,
- scrollSpy,
- spy,
- cb: () => done()
- })
- }
- })
- })
- it('should add the active class to the correct element (list-group markup)', done => {
- fixtureEl.innerHTML = [
- '<nav class="navbar">',
- ' <div class="list-group">',
- ' <a class="list-group-item" id="a-1" href="#div-1">div 1</a>',
- ' <a class="list-group-item" id="a-2" href="#div-2">div 2</a>',
- ' </div>',
- '</nav>',
- '<div class="content" style="overflow: auto; height: 50px">',
- ' <div id="div-1" style="height: 100px; padding: 0; margin: 0">div 1</div>',
- ' <div id="div-2" style="height: 200px; padding: 0; margin: 0">div 2</div>',
- '</div>'
- ].join('')
- const contentEl = fixtureEl.querySelector('.content')
- const scrollSpy = new ScrollSpy(contentEl, {
- offset: 0,
- target: '.navbar'
- })
- const spy = spyOn(scrollSpy, '_process').and.callThrough()
- testElementIsActiveAfterScroll({
- elementSelector: '#a-1',
- targetSelector: '#div-1',
- contentEl,
- scrollSpy,
- spy,
- cb: () => {
- testElementIsActiveAfterScroll({
- elementSelector: '#a-2',
- targetSelector: '#div-2',
- contentEl,
- scrollSpy,
- spy,
- cb: () => done()
- })
- }
- })
- })
- it('should clear selection if above the first section', done => {
- fixtureEl.innerHTML = [
- '<div id="header" style="height: 500px;"></div>',
- '<nav id="navigation" class="navbar">',
- ' <ul class="navbar-nav">',
- ' <li class="nav-item"><a id="one-link" class="nav-link active" href="#one">One</a></li>',
- ' <li class="nav-item"><a id="two-link" class="nav-link" href="#two">Two</a></li>',
- ' <li class="nav-item"><a id="three-link" class="nav-link" href="#three">Three</a></li>',
- ' </ul>',
- '</nav>',
- '<div id="content" style="height: 200px; overflow-y: auto;">',
- ' <div id="spacer" style="height: 100px;"></div>',
- ' <div id="one" style="height: 100px;"></div>',
- ' <div id="two" style="height: 100px;"></div>',
- ' <div id="three" style="height: 100px;"></div>',
- ' <div id="spacer" style="height: 100px;"></div>',
- '</div>'
- ].join('')
- const contentEl = fixtureEl.querySelector('#content')
- const scrollSpy = new ScrollSpy(contentEl, {
- target: '#navigation',
- offset: Manipulator.position(contentEl).top
- })
- const spy = spyOn(scrollSpy, '_process').and.callThrough()
- let firstTime = true
- contentEl.addEventListener('scroll', () => {
- const active = fixtureEl.querySelector('.active')
- expect(spy).toHaveBeenCalled()
- spy.calls.reset()
- if (firstTime) {
- expect(fixtureEl.querySelectorAll('.active').length).toEqual(1)
- expect(active.getAttribute('id')).toEqual('two-link')
- firstTime = false
- contentEl.scrollTop = 0
- } else {
- expect(active).toBeNull()
- done()
- }
- })
- contentEl.scrollTop = 201
- })
- it('should not clear selection if above the first section and first section is at the top', done => {
- fixtureEl.innerHTML = [
- '<div id="header" style="height: 500px;"></div>',
- '<nav id="navigation" class="navbar">',
- ' <ul class="navbar-nav">',
- ' <li class="nav-item"><a id="one-link" class="nav-link active" href="#one">One</a></li>',
- ' <li class="nav-item"><a id="two-link" class="nav-link" href="#two">Two</a></li>',
- ' <li class="nav-item"><a id="three-link" class="nav-link" href="#three">Three</a></li>',
- ' </ul>',
- '</nav>',
- '<div id="content" style="height: 200px; overflow-y: auto;">',
- ' <div id="one" style="height: 100px;"></div>',
- ' <div id="two" style="height: 100px;"></div>',
- ' <div id="three" style="height: 100px;"></div>',
- ' <div id="spacer" style="height: 100px;"></div>',
- '</div>'
- ].join('')
- const negativeHeight = -10
- const startOfSectionTwo = 101
- const contentEl = fixtureEl.querySelector('#content')
- const scrollSpy = new ScrollSpy(contentEl, {
- target: '#navigation',
- offset: contentEl.offsetTop
- })
- const spy = spyOn(scrollSpy, '_process').and.callThrough()
- let firstTime = true
- contentEl.addEventListener('scroll', () => {
- const active = fixtureEl.querySelector('.active')
- expect(spy).toHaveBeenCalled()
- spy.calls.reset()
- if (firstTime) {
- expect(fixtureEl.querySelectorAll('.active').length).toEqual(1)
- expect(active.getAttribute('id')).toEqual('two-link')
- firstTime = false
- contentEl.scrollTop = negativeHeight
- } else {
- expect(fixtureEl.querySelectorAll('.active').length).toEqual(1)
- expect(active.getAttribute('id')).toEqual('one-link')
- done()
- }
- })
- contentEl.scrollTop = startOfSectionTwo
- })
- it('should correctly select navigation element on backward scrolling when each target section height is 100%', done => {
- fixtureEl.innerHTML = [
- '<nav class="navbar">',
- ' <ul class="nav">',
- ' <li class="nav-item"><a id="li-100-1" class="nav-link" href="#div-100-1">div 1</a></li>',
- ' <li class="nav-item"><a id="li-100-2" class="nav-link" href="#div-100-2">div 2</a></li>',
- ' <li class="nav-item"><a id="li-100-3" class="nav-link" href="#div-100-3">div 3</a></li>',
- ' <li class="nav-item"><a id="li-100-4" class="nav-link" href="#div-100-4">div 4</a></li>',
- ' <li class="nav-item"><a id="li-100-5" class="nav-link" href="#div-100-5">div 5</a></li>',
- ' </ul>',
- '</nav>',
- '<div class="content" style="position: relative; overflow: auto; height: 100px">',
- ' <div id="div-100-1" style="position: relative; height: 100%; padding: 0; margin: 0">div 1</div>',
- ' <div id="div-100-2" style="position: relative; height: 100%; padding: 0; margin: 0">div 2</div>',
- ' <div id="div-100-3" style="position: relative; height: 100%; padding: 0; margin: 0">div 3</div>',
- ' <div id="div-100-4" style="position: relative; height: 100%; padding: 0; margin: 0">div 4</div>',
- ' <div id="div-100-5" style="position: relative; height: 100%; padding: 0; margin: 0">div 5</div>',
- '</div>'
- ].join('')
- const contentEl = fixtureEl.querySelector('.content')
- const scrollSpy = new ScrollSpy(contentEl, {
- offset: 0,
- target: '.navbar'
- })
- const spy = spyOn(scrollSpy, '_process').and.callThrough()
- testElementIsActiveAfterScroll({
- elementSelector: '#li-100-5',
- targetSelector: '#div-100-5',
- scrollSpy,
- spy,
- contentEl,
- cb() {
- contentEl.scrollTop = 0
- testElementIsActiveAfterScroll({
- elementSelector: '#li-100-4',
- targetSelector: '#div-100-4',
- scrollSpy,
- spy,
- contentEl,
- cb() {
- contentEl.scrollTop = 0
- testElementIsActiveAfterScroll({
- elementSelector: '#li-100-3',
- targetSelector: '#div-100-3',
- scrollSpy,
- spy,
- contentEl,
- cb() {
- contentEl.scrollTop = 0
- testElementIsActiveAfterScroll({
- elementSelector: '#li-100-2',
- targetSelector: '#div-100-2',
- scrollSpy,
- spy,
- contentEl,
- cb() {
- contentEl.scrollTop = 0
- testElementIsActiveAfterScroll({
- elementSelector: '#li-100-1',
- targetSelector: '#div-100-1',
- scrollSpy,
- spy,
- contentEl,
- cb: done
- })
- }
- })
- }
- })
- }
- })
- }
- })
- })
- it('should allow passed in option offset method: offset', () => {
- fixtureEl.innerHTML = [
- '<nav class="navbar">',
- ' <ul class="nav">',
- ' <li class="nav-item"><a id="li-jsm-1" class="nav-link" href="#div-jsm-1">div 1</a></li>',
- ' <li class="nav-item"><a id="li-jsm-2" class="nav-link" href="#div-jsm-2">div 2</a></li>',
- ' <li class="nav-item"><a id="li-jsm-3" class="nav-link" href="#div-jsm-3">div 3</a></li>',
- ' </ul>',
- '</nav>',
- '<div class="content" style="position: relative; overflow: auto; height: 100px">',
- ' <div id="div-jsm-1" style="position: relative; height: 200px; padding: 0; margin: 0">div 1</div>',
- ' <div id="div-jsm-2" style="position: relative; height: 150px; padding: 0; margin: 0">div 2</div>',
- ' <div id="div-jsm-3" style="position: relative; height: 250px; padding: 0; margin: 0">div 3</div>',
- '</div>'
- ].join('')
- const contentEl = fixtureEl.querySelector('.content')
- const targetEl = fixtureEl.querySelector('#div-jsm-2')
- const scrollSpy = new ScrollSpy(contentEl, {
- target: '.navbar',
- offset: 0,
- method: 'offset'
- })
- expect(scrollSpy._offsets[1]).toEqual(Manipulator.offset(targetEl).top)
- expect(scrollSpy._offsets[1]).not.toEqual(Manipulator.position(targetEl).top)
- })
- it('should allow passed in option offset method: position', () => {
- fixtureEl.innerHTML = [
- '<nav class="navbar">',
- ' <ul class="nav">',
- ' <li class="nav-item"><a id="li-jsm-1" class="nav-link" href="#div-jsm-1">div 1</a></li>',
- ' <li class="nav-item"><a id="li-jsm-2" class="nav-link" href="#div-jsm-2">div 2</a></li>',
- ' <li class="nav-item"><a id="li-jsm-3" class="nav-link" href="#div-jsm-3">div 3</a></li>',
- ' </ul>',
- '</nav>',
- '<div class="content" style="position: relative; overflow: auto; height: 100px">',
- ' <div id="div-jsm-1" style="position: relative; height: 200px; padding: 0; margin: 0">div 1</div>',
- ' <div id="div-jsm-2" style="position: relative; height: 150px; padding: 0; margin: 0">div 2</div>',
- ' <div id="div-jsm-3" style="position: relative; height: 250px; padding: 0; margin: 0">div 3</div>',
- '</div>'
- ].join('')
- const contentEl = fixtureEl.querySelector('.content')
- const targetEl = fixtureEl.querySelector('#div-jsm-2')
- const scrollSpy = new ScrollSpy(contentEl, {
- target: '.navbar',
- offset: 0,
- method: 'position'
- })
- expect(scrollSpy._offsets[1]).not.toEqual(Manipulator.offset(targetEl).top)
- expect(scrollSpy._offsets[1]).toEqual(Manipulator.position(targetEl).top)
- })
- })
- describe('dispose', () => {
- it('should dispose a scrollspy', () => {
- fixtureEl.innerHTML = '<div style="display: none;"></div>'
- const divEl = fixtureEl.querySelector('div')
- spyOn(divEl, 'addEventListener').and.callThrough()
- spyOn(divEl, 'removeEventListener').and.callThrough()
- const scrollSpy = new ScrollSpy(divEl)
- expect(divEl.addEventListener).toHaveBeenCalledWith('scroll', jasmine.any(Function), jasmine.any(Boolean))
- scrollSpy.dispose()
- expect(divEl.removeEventListener).toHaveBeenCalledWith('scroll', jasmine.any(Function), jasmine.any(Boolean))
- })
- })
- describe('jQueryInterface', () => {
- it('should create a scrollspy', () => {
- fixtureEl.innerHTML = '<div></div>'
- const div = fixtureEl.querySelector('div')
- jQueryMock.fn.scrollspy = ScrollSpy.jQueryInterface
- jQueryMock.elements = [div]
- jQueryMock.fn.scrollspy.call(jQueryMock)
- expect(ScrollSpy.getInstance(div)).not.toBeNull()
- })
- it('should create a scrollspy with given config', () => {
- fixtureEl.innerHTML = '<div></div>'
- const div = fixtureEl.querySelector('div')
- jQueryMock.fn.scrollspy = ScrollSpy.jQueryInterface
- jQueryMock.elements = [div]
- jQueryMock.fn.scrollspy.call(jQueryMock, { offset: 15 })
- spyOn(ScrollSpy.prototype, 'constructor')
- expect(ScrollSpy.prototype.constructor).not.toHaveBeenCalledWith(div, { offset: 15 })
- const scrollspy = ScrollSpy.getInstance(div)
- expect(scrollspy).not.toBeNull()
- expect(scrollspy._config.offset).toBe(15)
- })
- it('should not re create a scrollspy', () => {
- fixtureEl.innerHTML = '<div></div>'
- const div = fixtureEl.querySelector('div')
- const scrollSpy = new ScrollSpy(div)
- jQueryMock.fn.scrollspy = ScrollSpy.jQueryInterface
- jQueryMock.elements = [div]
- jQueryMock.fn.scrollspy.call(jQueryMock)
- expect(ScrollSpy.getInstance(div)).toEqual(scrollSpy)
- })
- it('should call a scrollspy method', () => {
- fixtureEl.innerHTML = '<div></div>'
- const div = fixtureEl.querySelector('div')
- const scrollSpy = new ScrollSpy(div)
- spyOn(scrollSpy, 'refresh')
- jQueryMock.fn.scrollspy = ScrollSpy.jQueryInterface
- jQueryMock.elements = [div]
- jQueryMock.fn.scrollspy.call(jQueryMock, 'refresh')
- expect(ScrollSpy.getInstance(div)).toEqual(scrollSpy)
- expect(scrollSpy.refresh).toHaveBeenCalled()
- })
- it('should throw error on undefined method', () => {
- fixtureEl.innerHTML = '<div></div>'
- const div = fixtureEl.querySelector('div')
- const action = 'undefinedMethod'
- jQueryMock.fn.scrollspy = ScrollSpy.jQueryInterface
- jQueryMock.elements = [div]
- expect(() => {
- jQueryMock.fn.scrollspy.call(jQueryMock, action)
- }).toThrowError(TypeError, `No method named "${action}"`)
- })
- })
- describe('getInstance', () => {
- it('should return scrollspy instance', () => {
- fixtureEl.innerHTML = '<div></div>'
- const div = fixtureEl.querySelector('div')
- const scrollSpy = new ScrollSpy(div)
- expect(ScrollSpy.getInstance(div)).toEqual(scrollSpy)
- expect(ScrollSpy.getInstance(div)).toBeInstanceOf(ScrollSpy)
- })
- it('should return null if there is no instance', () => {
- expect(ScrollSpy.getInstance(fixtureEl)).toEqual(null)
- })
- })
- describe('getOrCreateInstance', () => {
- it('should return scrollspy instance', () => {
- fixtureEl.innerHTML = '<div></div>'
- const div = fixtureEl.querySelector('div')
- const scrollspy = new ScrollSpy(div)
- expect(ScrollSpy.getOrCreateInstance(div)).toEqual(scrollspy)
- expect(ScrollSpy.getInstance(div)).toEqual(ScrollSpy.getOrCreateInstance(div, {}))
- expect(ScrollSpy.getOrCreateInstance(div)).toBeInstanceOf(ScrollSpy)
- })
- it('should return new instance when there is no scrollspy instance', () => {
- fixtureEl.innerHTML = '<div></div>'
- const div = fixtureEl.querySelector('div')
- expect(ScrollSpy.getInstance(div)).toEqual(null)
- expect(ScrollSpy.getOrCreateInstance(div)).toBeInstanceOf(ScrollSpy)
- })
- it('should return new instance when there is no scrollspy instance with given configuration', () => {
- fixtureEl.innerHTML = '<div></div>'
- const div = fixtureEl.querySelector('div')
- expect(ScrollSpy.getInstance(div)).toEqual(null)
- const scrollspy = ScrollSpy.getOrCreateInstance(div, {
- offset: 1
- })
- expect(scrollspy).toBeInstanceOf(ScrollSpy)
- expect(scrollspy._config.offset).toEqual(1)
- })
- it('should return the instance when exists without given configuration', () => {
- fixtureEl.innerHTML = '<div></div>'
- const div = fixtureEl.querySelector('div')
- const scrollspy = new ScrollSpy(div, {
- offset: 1
- })
- expect(ScrollSpy.getInstance(div)).toEqual(scrollspy)
- const scrollspy2 = ScrollSpy.getOrCreateInstance(div, {
- offset: 2
- })
- expect(scrollspy).toBeInstanceOf(ScrollSpy)
- expect(scrollspy2).toEqual(scrollspy)
- expect(scrollspy2._config.offset).toEqual(1)
- })
- })
- describe('event handler', () => {
- it('should create scrollspy on window load event', () => {
- fixtureEl.innerHTML = '<div data-bs-spy="scroll"></div>'
- const scrollSpyEl = fixtureEl.querySelector('div')
- window.dispatchEvent(createEvent('load'))
- expect(ScrollSpy.getInstance(scrollSpyEl)).not.toBeNull()
- })
- })
- })
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