EVOLUTION-MANAGER

Edit File: scrollspy.spec.js

import ScrollSpy from '../../src/scrollspy'
import Manipulator from '../../src/dom/manipulator'

/** Test helpers */
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)

// add top padding to fix Chrome on Android failures
    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 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('')

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('')

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('')

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('')

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('')

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')