transition-mode.spec.ts

import Vue from 'vue'
import { injectStyles, waitForUpdate, nextFrame } from './helpers'

describe('Transition mode', () => {
  const { duration, buffer } = injectStyles()
  const components = {
    one: { template: '<div>one</div>' },
    two: { template: '<div>two</div>' }
  }

  let el
  beforeEach(() => {
    el = document.createElement('div')
    document.body.appendChild(el)
  })

  it('dynamic components, simultaneous', done => {
    const vm = new Vue({
      template: `<div>
          <transition>
            <component :is="view" class="test">
            </component>
          </transition>
        </div>`,
      data: { view: 'one' },
      components
    }).$mount(el)
    expect(vm.$el.textContent).toBe('one')
    vm.view = 'two'
    waitForUpdate(() => {
      expect(vm.$el.innerHTML).toBe(
        '<div class="test v-leave v-leave-active">one</div>' +
          '<div class="test v-enter v-enter-active">two</div>'
      )
    })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test v-leave-active v-leave-to">one</div>' +
            '<div class="test v-enter-active v-enter-to">two</div>'
        )
      })
      .thenWaitFor(duration + buffer)
      .then(() => {
        expect(vm.$el.innerHTML).toBe('<div class="test">two</div>')
      })
      .then(done)
  })

  it('dynamic components, out-in', done => {
    let next
    const vm = new Vue({
      template: `<div>
          <transition name="test" mode="out-in" @after-leave="afterLeave">
            <component :is="view" class="test">
            </component>
          </transition>
        </div>`,
      data: { view: 'one' },
      components,
      methods: {
        afterLeave() {
          next()
        }
      }
    }).$mount(el)
    expect(vm.$el.textContent).toBe('one')
    vm.view = 'two'
    waitForUpdate(() => {
      expect(vm.$el.innerHTML).toBe(
        '<div class="test test-leave test-leave-active">one</div><!---->'
      )
    })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-leave-active test-leave-to">one</div><!---->'
        )
      })
      .thenWaitFor(_next => {
        next = _next
      })
      .then(() => {
        expect(vm.$el.innerHTML).toBe('<!---->')
      })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-enter test-enter-active">two</div>'
        )
      })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-enter-active test-enter-to">two</div>'
        )
      })
      .thenWaitFor(duration + buffer)
      .then(() => {
        expect(vm.$el.innerHTML).toBe('<div class="test">two</div>')
      })
      .then(done)
  })

  // #3440
  it('dynamic components, out-in (with extra re-render)', done => {
    let next
    const vm = new Vue({
      template: `<div>
          <transition name="test" mode="out-in" @after-leave="afterLeave">
            <component :is="view" class="test">
            </component>
          </transition>
        </div>`,
      data: { view: 'one' },
      components,
      methods: {
        afterLeave() {
          next()
        }
      }
    }).$mount(el)
    expect(vm.$el.textContent).toBe('one')
    vm.view = 'two'
    waitForUpdate(() => {
      expect(vm.$el.innerHTML).toBe(
        '<div class="test test-leave test-leave-active">one</div><!---->'
      )
    })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-leave-active test-leave-to">one</div><!---->'
        )
        // Force re-render before the element finishes leaving
        // this should not cause the incoming element to enter early
        vm.$forceUpdate()
      })
      .thenWaitFor(_next => {
        next = _next
      })
      .then(() => {
        expect(vm.$el.innerHTML).toBe('<!---->')
      })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-enter test-enter-active">two</div>'
        )
      })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-enter-active test-enter-to">two</div>'
        )
      })
      .thenWaitFor(duration + buffer)
      .then(() => {
        expect(vm.$el.innerHTML).toBe('<div class="test">two</div>')
      })
      .then(done)
  })

  it('dynamic components, in-out', done => {
    let next
    const vm = new Vue({
      template: `<div>
          <transition name="test" mode="in-out" @after-enter="afterEnter">
            <component :is="view" class="test">
            </component>
          </transition>
        </div>`,
      data: { view: 'one' },
      components,
      methods: {
        afterEnter() {
          next()
        }
      }
    }).$mount(el)
    expect(vm.$el.textContent).toBe('one')
    vm.view = 'two'
    waitForUpdate(() => {
      expect(vm.$el.innerHTML).toBe(
        '<div class="test">one</div>' +
          '<div class="test test-enter test-enter-active">two</div>'
      )
    })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test">one</div>' +
            '<div class="test test-enter-active test-enter-to">two</div>'
        )
      })
      .thenWaitFor(_next => {
        next = _next
      })
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test">one</div>' + '<div class="test">two</div>'
        )
      })
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-leave test-leave-active">one</div>' +
            '<div class="test">two</div>'
        )
      })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-leave-active test-leave-to">one</div>' +
            '<div class="test">two</div>'
        )
      })
      .thenWaitFor(duration + buffer)
      .then(() => {
        expect(vm.$el.innerHTML).toBe('<div class="test">two</div>')
      })
      .then(done)
  })

  it('dynamic components, in-out with early cancel', done => {
    let next
    const vm = new Vue({
      template: `<div>
          <transition name="test" mode="in-out" @after-enter="afterEnter">
            <component :is="view" class="test"></component>
          </transition>
        </div>`,
      data: { view: 'one' },
      components,
      methods: {
        afterEnter() {
          next()
        }
      }
    }).$mount(el)
    expect(vm.$el.textContent).toBe('one')
    vm.view = 'two'
    waitForUpdate(() => {
      expect(vm.$el.innerHTML).toBe(
        '<div class="test">one</div>' +
          '<div class="test test-enter test-enter-active">two</div>'
      )
    })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test">one</div>' +
            '<div class="test test-enter-active test-enter-to">two</div>'
        )
        // switch again before enter finishes,
        // this cancels both enter and leave.
        vm.view = 'one'
      })
      .then(() => {
        // 1. the pending leaving "one" should be removed instantly.
        // 2. the entering "two" should be placed into its final state instantly.
        // 3. a new "one" is created and entering
        expect(vm.$el.innerHTML).toBe(
          '<div class="test">two</div>' +
            '<div class="test test-enter test-enter-active">one</div>'
        )
      })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test">two</div>' +
            '<div class="test test-enter-active test-enter-to">one</div>'
        )
      })
      .thenWaitFor(_next => {
        next = _next
      })
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test">two</div>' + '<div class="test">one</div>'
        )
      })
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-leave test-leave-active">two</div>' +
            '<div class="test">one</div>'
        )
      })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-leave-active test-leave-to">two</div>' +
            '<div class="test">one</div>'
        )
      })
      .thenWaitFor(duration + buffer)
      .then(() => {
        expect(vm.$el.innerHTML).toBe('<div class="test">one</div>')
      })
      .then(done)
  })

  it('normal elements with different keys, simultaneous', done => {
    const vm = new Vue({
      template: `<div>
          <transition>
            <div :key="view" class="test">{{view}}</div>
          </transition>
        </div>`,
      data: { view: 'one' },
      components
    }).$mount(el)
    expect(vm.$el.textContent).toBe('one')
    vm.view = 'two'
    waitForUpdate(() => {
      expect(vm.$el.innerHTML).toBe(
        '<div class="test v-leave v-leave-active">one</div>' +
          '<div class="test v-enter v-enter-active">two</div>'
      )
    })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test v-leave-active v-leave-to">one</div>' +
            '<div class="test v-enter-active v-enter-to">two</div>'
        )
      })
      .thenWaitFor(duration + buffer)
      .then(() => {
        expect(vm.$el.innerHTML).toBe('<div class="test">two</div>')
      })
      .then(done)
  })

  it('normal elements with different keys, out-in', done => {
    let next
    const vm = new Vue({
      template: `<div>
          <transition name="test" mode="out-in" @after-leave="afterLeave">
            <div :key="view" class="test">{{view}}</div>
          </transition>
        </div>`,
      data: { view: 'one' },
      components,
      methods: {
        afterLeave() {
          next()
        }
      }
    }).$mount(el)
    expect(vm.$el.textContent).toBe('one')
    vm.view = 'two'
    waitForUpdate(() => {
      expect(vm.$el.innerHTML).toBe(
        '<div class="test test-leave test-leave-active">one</div><!---->'
      )
    })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-leave-active test-leave-to">one</div><!---->'
        )
      })
      .thenWaitFor(_next => {
        next = _next
      })
      .then(() => {
        expect(vm.$el.innerHTML).toBe('<!---->')
      })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-enter test-enter-active">two</div>'
        )
      })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-enter-active test-enter-to">two</div>'
        )
      })
      .thenWaitFor(duration + buffer)
      .then(() => {
        expect(vm.$el.innerHTML).toBe('<div class="test">two</div>')
      })
      .then(done)
  })

  it('normal elements with different keys, in-out', done => {
    let next
    const vm = new Vue({
      template: `<div>
          <transition name="test" mode="in-out" @after-enter="afterEnter">
            <div :key="view" class="test">{{view}}</div>
          </transition>
        </div>`,
      data: { view: 'one' },
      components,
      methods: {
        afterEnter() {
          next()
        }
      }
    }).$mount(el)
    expect(vm.$el.textContent).toBe('one')
    vm.view = 'two'
    waitForUpdate(() => {
      expect(vm.$el.innerHTML).toBe(
        '<div class="test">one</div>' +
          '<div class="test test-enter test-enter-active">two</div>'
      )
    })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test">one</div>' +
            '<div class="test test-enter-active test-enter-to">two</div>'
        )
      })
      .thenWaitFor(_next => {
        next = _next
      })
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test">one</div>' + '<div class="test">two</div>'
        )
      })
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-leave test-leave-active">one</div>' +
            '<div class="test">two</div>'
        )
      })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.innerHTML).toBe(
          '<div class="test test-leave-active test-leave-to">one</div>' +
            '<div class="test">two</div>'
        )
      })
      .thenWaitFor(duration + buffer)
      .then(() => {
        expect(vm.$el.innerHTML).toBe('<div class="test">two</div>')
      })
      .then(done)
  })

  it('transition out-in on async component (resolve before leave complete)', done => {
    const vm = new Vue({
      template: `
          <div>
            <transition name="test-anim" mode="out-in">
              <component-a v-if="ok"></component-a>
              <component-b v-else></component-b>
            </transition>
          </div>
        `,
      components: {
        componentA: resolve => {
          setTimeout(() => {
            resolve({ template: '<div><h1>component A</h1></div>' })
            next1()
          }, duration / 2)
        },
        componentB: resolve => {
          setTimeout(() => {
            resolve({ template: '<div><h1>component B</h1></div>' })
          }, duration / 2)
        }
      },
      data: {
        ok: true
      }
    }).$mount(el)

    expect(vm.$el.innerHTML).toBe('<!---->')

    function next1() {
      Vue.nextTick(() => {
        expect(vm.$el.children.length).toBe(1)
        expect(vm.$el.textContent).toBe('component A')
        expect(vm.$el.children[0].className).toBe(
          'test-anim-enter test-anim-enter-active'
        )
        nextFrame(() => {
          expect(vm.$el.children[0].className).toBe(
            'test-anim-enter-active test-anim-enter-to'
          )
          setTimeout(() => {
            expect(vm.$el.children[0].className).toBe('')
            vm.ok = false
            next2()
          }, duration + buffer)
        })
      })
    }

    function next2() {
      waitForUpdate(() => {
        expect(vm.$el.children.length).toBe(1)
        expect(vm.$el.textContent).toBe('component A')
        expect(vm.$el.children[0].className).toBe(
          'test-anim-leave test-anim-leave-active'
        )
      })
        .thenWaitFor(nextFrame)
        .then(() => {
          expect(vm.$el.children[0].className).toBe(
            'test-anim-leave-active test-anim-leave-to'
          )
        })
        .thenWaitFor(duration + buffer)
        .then(() => {
          expect(vm.$el.children.length).toBe(1)
          expect(vm.$el.textContent).toBe('component B')
          expect(vm.$el.children[0].className).toMatch('test-anim-enter-active')
        })
        .thenWaitFor(duration * 2)
        .then(() => {
          expect(vm.$el.children[0].className).toBe('')
        })
        .then(done)
    }
  })

  it('transition out-in on async component (resolve after leave complete)', done => {
    const vm = new Vue({
      template: `
          <div>
            <transition name="test-anim" mode="out-in">
              <component-a v-if="ok"></component-a>
              <component-b v-else></component-b>
            </transition>
          </div>
        `,
      components: {
        componentA: { template: '<div><h1>component A</h1></div>' },
        componentB: resolve => {
          setTimeout(() => {
            resolve({ template: '<div><h1>component B</h1></div>' })
            Vue.nextTick(next)
          }, (duration + buffer) * 1.7)
        }
      },
      data: {
        ok: true
      }
    }).$mount(el)

    expect(vm.$el.innerHTML).toBe('<div><h1>component A</h1></div>')

    let next

    vm.ok = false
    waitForUpdate(() => {
      expect(vm.$el.children.length).toBe(1)
      expect(vm.$el.textContent).toBe('component A')
      expect(vm.$el.children[0].className).toBe(
        'test-anim-leave test-anim-leave-active'
      )
    })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.children[0].className).toBe(
          'test-anim-leave-active test-anim-leave-to'
        )
      })
      .thenWaitFor(duration + buffer)
      .then(() => {
        expect(vm.$el.children.length).toBe(0)
        expect(vm.$el.innerHTML).toBe('<!---->')
      })
      .thenWaitFor(_next => {
        next = _next
      })
      .then(() => {
        expect(vm.$el.children.length).toBe(1)
        expect(vm.$el.textContent).toBe('component B')
        expect(vm.$el.children[0].className).toBe(
          'test-anim-enter test-anim-enter-active'
        )
      })
      .thenWaitFor(nextFrame)
      .then(() => {
        expect(vm.$el.children[0].className).toBe(
          'test-anim-enter-active test-anim-enter-to'
        )
      })
      .thenWaitFor(duration + buffer)
      .then(() => {
        expect(vm.$el.children.length).toBe(1)
        expect(vm.$el.textContent).toBe('component B')
        expect(vm.$el.children[0].className).toBe('')
      })
      .then(done)
  })

  it('transition in-out on async component', done => {
    const vm = new Vue({
      template: `
          <div>
            <transition name="test-anim" mode="in-out">
              <component-a v-if="ok"></component-a>
              <component-b v-else></component-b>
            </transition>
          </div>
        `,
      components: {
        componentA: resolve => {
          setTimeout(() => {
            resolve({ template: '<div><h1>component A</h1></div>' })
            next1()
          }, duration / 2)
        },
        componentB: resolve => {
          setTimeout(() => {
            resolve({ template: '<div><h1>component B</h1></div>' })
            next2()
          }, duration / 2)
        }
      },
      data: {
        ok: true
      }
    }).$mount(el)

    expect(vm.$el.innerHTML).toBe('<!---->')

    function next1() {
      Vue.nextTick(() => {
        expect(vm.$el.children.length).toBe(1)
        expect(vm.$el.textContent).toBe('component A')
        expect(vm.$el.children[0].className).toBe(
          'test-anim-enter test-anim-enter-active'
        )
        nextFrame(() => {
          expect(vm.$el.children[0].className).toBe(
            'test-anim-enter-active test-anim-enter-to'
          )
          setTimeout(() => {
            expect(vm.$el.children[0].className).toBe('')
            vm.ok = false
          }, duration + buffer)
        })
      })
    }

    function next2() {
      waitForUpdate(() => {
        expect(vm.$el.children.length).toBe(2)
        expect(vm.$el.textContent).toBe('component Acomponent B')
        expect(vm.$el.children[0].className).toBe('')
        expect(vm.$el.children[1].className).toBe(
          'test-anim-enter test-anim-enter-active'
        )
      })
        .thenWaitFor(nextFrame)
        .then(() => {
          expect(vm.$el.children[1].className).toBe(
            'test-anim-enter-active test-anim-enter-to'
          )
        })
        .thenWaitFor(duration + buffer)
        .then(() => {
          expect(vm.$el.children.length).toBe(2)
          expect(vm.$el.textContent).toBe('component Acomponent B')
          expect(vm.$el.children[0].className).toMatch('test-anim-leave-active')
          expect(vm.$el.children[1].className).toBe('')
        })
        .thenWaitFor(duration + buffer * 2)
        .then(() => {
          expect(vm.$el.children.length).toBe(1)
          expect(vm.$el.textContent).toBe('component B')
          expect(vm.$el.children[0].className).toBe('')
        })
        .then(done)
    }
  })

  it('warn invalid mode', () => {
    new Vue({
      template: '<transition mode="foo"><div>123</div></transition>'
    }).$mount()
    expect('invalid <transition> mode: foo').toHaveBeenWarned()
  })
})