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BaseTransition.spec.ts
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BaseTransition.spec.ts
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import {
BaseTransition,
type BaseTransitionProps,
KeepAlive,
type TestElement,
type VNodeProps,
h,
nextTick,
nodeOps,
ref,
render,
serialize,
serializeInner,
} from '@vue/runtime-test'
function mount(
props: BaseTransitionProps,
slot: () => any,
withKeepAlive = false,
) {
const root = nodeOps.createElement('div')
const show = ref(true)
const unmount = () => (show.value = false)
const App = {
render() {
return show.value
? h(BaseTransition, props, () => {
return withKeepAlive ? h(KeepAlive, null, slot()) : slot()
})
: null
},
}
render(h(App), root)
return { root, unmount }
}
function mockProps(extra: BaseTransitionProps = {}, withKeepAlive = false) {
const cbs: {
doneEnter: Record<string, () => void>
doneLeave: Record<string, () => void>
} = {
doneEnter: {},
doneLeave: {},
}
const props: BaseTransitionProps = {
onBeforeEnter: vi.fn(el => {
if (!extra.persisted && !withKeepAlive) {
expect(el.parentNode).toBeNull()
}
}),
onEnter: vi.fn((el, done) => {
cbs.doneEnter[serialize(el as TestElement)] = done
}),
onAfterEnter: vi.fn(),
onEnterCancelled: vi.fn(),
onBeforeLeave: vi.fn(),
onLeave: vi.fn((el, done) => {
cbs.doneLeave[serialize(el as TestElement)] = done
}),
onAfterLeave: vi.fn(),
onLeaveCancelled: vi.fn(),
onBeforeAppear: vi.fn(),
onAppear: vi.fn((el, done) => {
cbs.doneEnter[serialize(el as TestElement)] = done
}),
onAfterAppear: vi.fn(),
onAppearCancelled: vi.fn(),
...extra,
}
return {
props,
cbs,
}
}
function assertCalls(
props: BaseTransitionProps,
calls: Record<string, number>,
) {
Object.keys(calls).forEach(key => {
expect(props[key as keyof BaseTransitionProps]).toHaveBeenCalledTimes(
calls[key],
)
})
}
function assertCalledWithEl(fn: any, expected: string, callIndex = 0) {
expect(serialize(fn.mock.calls[callIndex][0])).toBe(expected)
}
interface ToggleOptions {
trueBranch: () => any
falseBranch: () => any
trueSerialized: string
falseSerialized: string
}
type TestFn = (o: ToggleOptions, withKeepAlive?: boolean) => void
function runTestWithElements(tester: TestFn) {
return tester({
trueBranch: () => h('div'),
falseBranch: () => h('span'),
trueSerialized: `<div></div>`,
falseSerialized: `<span></span>`,
})
}
function runTestWithComponents(tester: TestFn) {
const CompA = ({ msg }: { msg: string }) => h('div', msg)
// test HOC
const CompB = ({ msg }: { msg: string }) => h(CompC, { msg })
const CompC = ({ msg }: { msg: string }) => h('span', msg)
return tester({
trueBranch: () => h(CompA, { msg: 'foo' }),
falseBranch: () => h(CompB, { msg: 'bar' }),
trueSerialized: `<div>foo</div>`,
falseSerialized: `<span>bar</span>`,
})
}
function runTestWithKeepAlive(tester: TestFn) {
const trueComp = {
setup() {
const count = ref(0)
return () => h('div', count.value)
},
}
const falseComp = {
setup() {
const count = ref(0)
return () => h('span', count.value)
},
}
return tester(
{
trueBranch: () => h(trueComp),
falseBranch: () => h(falseComp),
trueSerialized: `<div>0</div>`,
falseSerialized: `<span>0</span>`,
},
true /* withKeepAlive: true */,
)
}
describe('BaseTransition', () => {
test('appear: true w/ appear hooks', () => {
const { props, cbs } = mockProps({
appear: true,
})
mount(props, () => h('div'))
expect(props.onBeforeAppear).toHaveBeenCalledTimes(1)
expect(props.onAppear).toHaveBeenCalledTimes(1)
expect(props.onAfterAppear).not.toHaveBeenCalled()
// enter should not be called
expect(props.onBeforeEnter).not.toHaveBeenCalled()
expect(props.onEnter).not.toHaveBeenCalled()
expect(props.onAfterEnter).not.toHaveBeenCalled()
cbs.doneEnter[`<div></div>`]()
expect(props.onAfterAppear).toHaveBeenCalledTimes(1)
expect(props.onAfterEnter).not.toHaveBeenCalled()
})
test('appear: true w/ fallback to enter hooks', () => {
const { props, cbs } = mockProps({
appear: true,
onBeforeAppear: undefined,
onAppear: undefined,
onAfterAppear: undefined,
onAppearCancelled: undefined,
})
mount(props, () => h('div'))
expect(props.onBeforeEnter).toHaveBeenCalledTimes(1)
expect(props.onEnter).toHaveBeenCalledTimes(1)
expect(props.onAfterEnter).not.toHaveBeenCalled()
cbs.doneEnter[`<div></div>`]()
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
})
describe('persisted: true', () => {
// this is pretty much how v-show is implemented
// (but using the directive API instead)
function mockPersistedHooks() {
const state = { show: true }
const toggle = ref(true)
const hooks: VNodeProps = {
onVnodeBeforeMount(vnode) {
vnode.transition!.beforeEnter(vnode.el!)
},
onVnodeMounted(vnode) {
vnode.transition!.enter(vnode.el!)
},
onVnodeUpdated(vnode, oldVnode) {
if (oldVnode.props!.id !== vnode.props!.id) {
if (vnode.props!.id) {
vnode.transition!.beforeEnter(vnode.el!)
state.show = true
vnode.transition!.enter(vnode.el!)
} else {
vnode.transition!.leave(vnode.el!, () => {
state.show = false
})
}
}
},
}
return { state, toggle, hooks }
}
test('w/ appear: false', async () => {
const { props, cbs } = mockProps({ persisted: true })
const { toggle, state, hooks } = mockPersistedHooks()
mount(props, () => h('div', { id: toggle.value, ...hooks }))
// without appear: true, enter hooks should not be called on mount
expect(props.onBeforeEnter).not.toHaveBeenCalled()
expect(props.onEnter).not.toHaveBeenCalled()
expect(props.onAfterEnter).not.toHaveBeenCalled()
toggle.value = false
await nextTick()
expect(props.onBeforeLeave).toHaveBeenCalledTimes(1)
expect(props.onLeave).toHaveBeenCalledTimes(1)
expect(props.onAfterLeave).not.toHaveBeenCalled()
expect(state.show).toBe(true) // should still be shown
cbs.doneLeave[`<div id=false></div>`]()
expect(state.show).toBe(false) // should be hidden now
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
toggle.value = true
await nextTick()
expect(props.onBeforeEnter).toHaveBeenCalledTimes(1)
expect(props.onEnter).toHaveBeenCalledTimes(1)
expect(props.onAfterEnter).not.toHaveBeenCalled()
expect(state.show).toBe(true) // should be shown now
cbs.doneEnter[`<div id=true></div>`]()
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
})
test('w/ appear: true', () => {
const { props, cbs } = mockProps({ persisted: true, appear: true })
const { hooks } = mockPersistedHooks()
mount(props, () => h('div', hooks))
expect(props.onBeforeAppear).toHaveBeenCalledTimes(1)
expect(props.onAppear).toHaveBeenCalledTimes(1)
expect(props.onAfterAppear).not.toHaveBeenCalled()
cbs.doneEnter[`<div></div>`]()
expect(props.onAfterAppear).toHaveBeenCalledTimes(1)
})
})
describe('toggle on-off', () => {
async function testToggleOnOff(
{
trueBranch,
trueSerialized,
falseBranch,
falseSerialized,
}: ToggleOptions,
mode?: BaseTransitionProps['mode'],
) {
const toggle = ref(true)
const { props, cbs } = mockProps({ mode })
const { root } = mount(props, () =>
toggle.value ? trueBranch() : falseBranch(),
)
// without appear: true, enter hooks should not be called on mount
expect(props.onBeforeEnter).not.toHaveBeenCalled()
expect(props.onEnter).not.toHaveBeenCalled()
expect(props.onAfterEnter).not.toHaveBeenCalled()
toggle.value = false
await nextTick()
// comment placeholder enters immediately
expect(serializeInner(root)).toBe(`${trueSerialized}${falseSerialized}`)
expect(props.onBeforeLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeLeave, trueSerialized)
expect(props.onLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onLeave, trueSerialized)
expect(props.onAfterLeave).not.toHaveBeenCalled()
cbs.doneLeave[trueSerialized]()
expect(serializeInner(root)).toBe(falseSerialized)
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterLeave, trueSerialized)
toggle.value = true
await nextTick()
expect(serializeInner(root)).toBe(trueSerialized)
// before enter spy asserts node has no parent when it's called
expect(props.onBeforeEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeEnter, trueSerialized)
expect(props.onEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onEnter, trueSerialized)
expect(props.onAfterEnter).not.toHaveBeenCalled()
cbs.doneEnter[trueSerialized]()
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterEnter, trueSerialized)
assertCalls(props, {
onBeforeEnter: 1,
onEnter: 1,
onAfterEnter: 1,
onEnterCancelled: 0,
onBeforeLeave: 1,
onLeave: 1,
onAfterLeave: 1,
onLeaveCancelled: 0,
})
}
test('w/ element', async () => {
await testToggleOnOff({
trueBranch: () => h('div'),
trueSerialized: `<div></div>`,
falseBranch: () => null,
falseSerialized: `<!---->`,
})
})
test('w/ component', async () => {
const Comp = ({ msg }: { msg: string }) => h('div', msg)
await testToggleOnOff({
trueBranch: () => h(Comp, { msg: 'hello' }),
trueSerialized: `<div>hello</div>`,
falseBranch: () => null,
falseSerialized: `<!---->`,
})
})
test('w/ mode: "in-out', async () => {
await testToggleOnOff(
{
trueBranch: () => h('div'),
trueSerialized: `<div></div>`,
falseBranch: () => null,
falseSerialized: `<!---->`,
},
'in-out',
)
})
})
describe('toggle on-off before finish', () => {
async function testToggleOnOffBeforeFinish({
trueBranch,
trueSerialized,
falseBranch = () => null,
falseSerialized = `<!---->`,
}: ToggleOptions) {
const toggle = ref(false)
const { props, cbs } = mockProps()
const { root } = mount(props, () =>
toggle.value ? trueBranch() : falseBranch(),
)
// start enter
toggle.value = true
await nextTick()
expect(serializeInner(root)).toBe(trueSerialized)
expect(props.onBeforeEnter).toHaveBeenCalledTimes(1)
expect(props.onEnter).toHaveBeenCalledTimes(1)
// leave before enter finishes
toggle.value = false
await nextTick()
expect(serializeInner(root)).toBe(`${trueSerialized}${falseSerialized}`)
expect(props.onEnterCancelled).toHaveBeenCalled()
expect(props.onBeforeLeave).toHaveBeenCalledTimes(1)
expect(props.onLeave).toHaveBeenCalledTimes(1)
expect(props.onAfterLeave).not.toHaveBeenCalled()
// calling doneEnter now should have no effect
cbs.doneEnter[trueSerialized]()
expect(props.onAfterEnter).not.toHaveBeenCalled()
// enter again before leave finishes
toggle.value = true
await nextTick()
expect(props.onBeforeEnter).toHaveBeenCalledTimes(2)
expect(props.onEnter).toHaveBeenCalledTimes(2)
// 1. should remove the previous leaving <div> so there is only one <div>
// 2. should remove the comment placeholder for the off branch
expect(serializeInner(root)).toBe(trueSerialized)
// note onLeaveCancelled is NOT called because it was a forced early
// removal instead of a cancel. Instead, onAfterLeave should be called.
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
// calling doneLeave again should have no effect now
cbs.doneLeave[trueSerialized]()
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
cbs.doneEnter[trueSerialized]()
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
assertCalls(props, {
onBeforeEnter: 2,
onEnter: 2,
onAfterEnter: 1,
onEnterCancelled: 1,
onBeforeLeave: 1,
onLeave: 1,
onAfterLeave: 1,
onLeaveCancelled: 0,
})
}
test('w/ element', async () => {
await testToggleOnOffBeforeFinish({
trueBranch: () => h('div'),
trueSerialized: `<div></div>`,
falseBranch: () => null,
falseSerialized: `<!---->`,
})
})
test('w/ component', async () => {
const Comp = ({ msg }: { msg: string }) => h('div', msg)
await testToggleOnOffBeforeFinish({
trueBranch: () => h(Comp, { msg: 'hello' }),
trueSerialized: `<div>hello</div>`,
falseBranch: () => null,
falseSerialized: `<!---->`,
})
})
})
describe('toggle between branches', () => {
async function testToggleBranches(
{
trueBranch,
falseBranch,
trueSerialized,
falseSerialized,
}: ToggleOptions,
withKeepAlive = false,
) {
const toggle = ref(true)
const { props, cbs } = mockProps({}, withKeepAlive)
const { root } = mount(
props,
() => (toggle.value ? trueBranch() : falseBranch()),
withKeepAlive,
)
// without appear: true, enter hooks should not be called on mount
expect(props.onBeforeEnter).not.toHaveBeenCalled()
expect(props.onEnter).not.toHaveBeenCalled()
expect(props.onAfterEnter).not.toHaveBeenCalled()
// start toggle
toggle.value = false
await nextTick()
expect(serializeInner(root)).toBe(`${trueSerialized}${falseSerialized}`)
// leave should be triggered
expect(props.onBeforeLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeLeave, trueSerialized)
expect(props.onLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onLeave, trueSerialized)
expect(props.onAfterLeave).not.toHaveBeenCalled()
// enter should also be triggered
expect(props.onBeforeEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeEnter, falseSerialized)
expect(props.onEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onEnter, falseSerialized)
expect(props.onAfterEnter).not.toHaveBeenCalled()
// finish enter
cbs.doneEnter[falseSerialized]()
expect(serializeInner(root)).toBe(`${trueSerialized}${falseSerialized}`)
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterEnter, falseSerialized)
expect(props.onAfterLeave).not.toHaveBeenCalled()
// finish leave
cbs.doneLeave[trueSerialized]()
expect(serializeInner(root)).toBe(`${falseSerialized}`)
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterLeave, trueSerialized)
// toggle again
toggle.value = true
await nextTick()
expect(serializeInner(root)).toBe(`${falseSerialized}${trueSerialized}`)
// leave should be triggered
expect(props.onBeforeLeave).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onBeforeLeave, falseSerialized, 1)
expect(props.onLeave).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onLeave, falseSerialized, 1)
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
// enter should also be triggered
expect(props.onBeforeEnter).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onBeforeEnter, trueSerialized, 1)
expect(props.onEnter).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onEnter, trueSerialized, 1)
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
// finish leave first
cbs.doneLeave[falseSerialized]()
expect(serializeInner(root)).toBe(`${trueSerialized}`)
expect(props.onAfterLeave).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onAfterLeave, falseSerialized, 1)
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
// finish enter
cbs.doneEnter[trueSerialized]()
expect(serializeInner(root)).toBe(`${trueSerialized}`)
expect(props.onAfterEnter).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onAfterEnter, trueSerialized, 1)
assertCalls(props, {
onBeforeEnter: 2,
onEnter: 2,
onAfterEnter: 2,
onBeforeLeave: 2,
onLeave: 2,
onAfterLeave: 2,
onEnterCancelled: 0,
onLeaveCancelled: 0,
})
}
test('w/ elements', async () => {
await runTestWithElements(testToggleBranches)
})
test('w/ components', async () => {
await runTestWithComponents(testToggleBranches)
})
test('w/ KeepAlive', async () => {
await runTestWithKeepAlive(testToggleBranches)
})
})
describe('toggle between branches before finish', () => {
async function testToggleBranchesBeforeFinish(
{
trueBranch,
falseBranch,
trueSerialized,
falseSerialized,
}: ToggleOptions,
withKeepAlive = false,
) {
const toggle = ref(true)
const { props, cbs } = mockProps({}, withKeepAlive)
const { root } = mount(
props,
() => (toggle.value ? trueBranch() : falseBranch()),
withKeepAlive,
)
// start toggle
toggle.value = false
await nextTick()
expect(serializeInner(root)).toBe(`${trueSerialized}${falseSerialized}`)
// leave should be triggered
expect(props.onBeforeLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeLeave, trueSerialized)
expect(props.onLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onLeave, trueSerialized)
expect(props.onAfterLeave).not.toHaveBeenCalled()
// enter should also be triggered
expect(props.onBeforeEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeEnter, falseSerialized)
expect(props.onEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onEnter, falseSerialized)
expect(props.onAfterEnter).not.toHaveBeenCalled()
// toggle again before transition finishes
toggle.value = true
await nextTick()
// the previous leaving true branch should have been force-removed
expect(serializeInner(root)).toBe(`${falseSerialized}${trueSerialized}`)
if (!withKeepAlive) {
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterLeave, trueSerialized)
} else {
expect(props.onLeaveCancelled).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onLeaveCancelled, trueSerialized)
}
// false branch enter is cancelled
expect(props.onEnterCancelled).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onEnterCancelled, falseSerialized)
// calling false branch done should have no effect now
cbs.doneEnter[falseSerialized]()
expect(props.onAfterEnter).not.toHaveBeenCalled()
// false branch leave triggered
expect(props.onBeforeLeave).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onBeforeLeave, falseSerialized, 1)
expect(props.onLeave).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onLeave, falseSerialized, 1)
// true branch enter triggered
expect(props.onBeforeEnter).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onBeforeEnter, trueSerialized, 1)
expect(props.onEnter).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onEnter, trueSerialized, 1)
expect(props.onAfterEnter).not.toHaveBeenCalled()
// toggle again
toggle.value = false
await nextTick()
// the previous leaving false branch should have been force-removed
expect(serializeInner(root)).toBe(`${trueSerialized}${falseSerialized}`)
if (!withKeepAlive) {
expect(props.onAfterLeave).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onAfterLeave, falseSerialized, 1)
} else {
expect(props.onLeaveCancelled).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onLeaveCancelled, falseSerialized, 1)
}
// true branch enter is cancelled
expect(props.onEnterCancelled).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onEnterCancelled, trueSerialized, 1)
// calling true branch enter done should have no effect
cbs.doneEnter[trueSerialized]()
expect(props.onAfterEnter).not.toHaveBeenCalled()
// true branch leave triggered (again)
expect(props.onBeforeLeave).toHaveBeenCalledTimes(3)
assertCalledWithEl(props.onBeforeLeave, trueSerialized, 2)
expect(props.onLeave).toHaveBeenCalledTimes(3)
assertCalledWithEl(props.onLeave, trueSerialized, 2)
// false branch enter triggered (again)
expect(props.onBeforeEnter).toHaveBeenCalledTimes(3)
assertCalledWithEl(props.onBeforeEnter, falseSerialized, 2)
expect(props.onEnter).toHaveBeenCalledTimes(3)
assertCalledWithEl(props.onEnter, falseSerialized, 2)
expect(props.onAfterEnter).not.toHaveBeenCalled()
cbs.doneEnter[falseSerialized]()
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterEnter, falseSerialized)
cbs.doneLeave[trueSerialized]()
if (!withKeepAlive) {
expect(props.onAfterLeave).toHaveBeenCalledTimes(3)
assertCalledWithEl(props.onAfterLeave, trueSerialized, 2)
} else {
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterLeave, trueSerialized)
}
assertCalls(props, {
onBeforeEnter: 3,
onEnter: 3,
onAfterEnter: 1,
onEnterCancelled: 2,
onBeforeLeave: 3,
onLeave: 3,
onAfterLeave: withKeepAlive ? 1 : 3,
onLeaveCancelled: withKeepAlive ? 2 : 0,
})
}
test('w/ elements', async () => {
await runTestWithElements(testToggleBranchesBeforeFinish)
})
test('w/ components', async () => {
await runTestWithComponents(testToggleBranchesBeforeFinish)
})
test('w/ KeepAlive', async () => {
await runTestWithKeepAlive(testToggleBranchesBeforeFinish)
})
})
describe('mode: "out-in"', () => {
async function testOutIn(
{
trueBranch,
falseBranch,
trueSerialized,
falseSerialized,
}: ToggleOptions,
withKeepAlive = false,
) {
const toggle = ref(true)
const { props, cbs } = mockProps({ mode: 'out-in' }, withKeepAlive)
const { root } = mount(
props,
() => (toggle.value ? trueBranch() : falseBranch()),
withKeepAlive,
)
// trigger toggle
toggle.value = false
await nextTick()
// a placeholder is injected until the leave finishes
expect(serializeInner(root)).toBe(`${trueSerialized}<!---->`)
expect(props.onBeforeLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeLeave, trueSerialized)
expect(props.onLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onLeave, trueSerialized)
expect(props.onAfterLeave).not.toHaveBeenCalled()
// enter should not have started
expect(props.onBeforeEnter).not.toHaveBeenCalled()
expect(props.onEnter).not.toHaveBeenCalled()
expect(props.onAfterEnter).not.toHaveBeenCalled()
cbs.doneLeave[trueSerialized]()
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterLeave, trueSerialized)
// have to wait for a tick because this triggers an update
await nextTick()
expect(serializeInner(root)).toBe(falseSerialized)
// enter should start
expect(props.onBeforeEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeEnter, falseSerialized)
expect(props.onEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onEnter, falseSerialized)
expect(props.onAfterEnter).not.toHaveBeenCalled()
// finish enter
cbs.doneEnter[falseSerialized]()
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterEnter, falseSerialized)
// toggle again
toggle.value = true
await nextTick()
expect(serializeInner(root)).toBe(`${falseSerialized}<!---->`)
expect(props.onBeforeLeave).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onBeforeLeave, falseSerialized, 1)
expect(props.onLeave).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onLeave, falseSerialized, 1)
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
// enter should not have started
expect(props.onBeforeEnter).toHaveBeenCalledTimes(1)
expect(props.onEnter).toHaveBeenCalledTimes(1)
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
cbs.doneLeave[falseSerialized]()
expect(props.onAfterLeave).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onAfterLeave, falseSerialized, 1)
await nextTick()
expect(serializeInner(root)).toBe(trueSerialized)
// enter should start
expect(props.onBeforeEnter).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onBeforeEnter, trueSerialized, 1)
expect(props.onEnter).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onEnter, trueSerialized, 1)
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
// finish enter
cbs.doneEnter[trueSerialized]()
expect(props.onAfterEnter).toHaveBeenCalledTimes(2)
assertCalledWithEl(props.onAfterEnter, trueSerialized, 1)
assertCalls(props, {
onBeforeEnter: 2,
onEnter: 2,
onAfterEnter: 2,
onEnterCancelled: 0,
onBeforeLeave: 2,
onLeave: 2,
onAfterLeave: 2,
onLeaveCancelled: 0,
})
}
test('w/ elements', async () => {
await runTestWithElements(testOutIn)
})
test('w/ components', async () => {
await runTestWithComponents(testOutIn)
})
test('w/ KeepAlive', async () => {
await runTestWithKeepAlive(testOutIn)
})
})
// #6835
describe('mode: "out-in" toggle again after unmounted', () => {
async function testOutIn(
{
trueBranch,
falseBranch,
trueSerialized,
falseSerialized,
}: ToggleOptions,
withKeepAlive = false,
) {
const toggle = ref(true)
const { props, cbs } = mockProps({ mode: 'out-in' }, withKeepAlive)
const { root, unmount } = mount(
props,
() => (toggle.value ? trueBranch() : falseBranch()),
withKeepAlive,
)
// trigger toggle
toggle.value = false
await nextTick()
// a placeholder is injected until the leave finishes
expect(serializeInner(root)).toBe(`${trueSerialized}<!---->`)
expect(props.onBeforeLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeLeave, trueSerialized)
expect(props.onLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onLeave, trueSerialized)
expect(props.onAfterLeave).not.toHaveBeenCalled()
// enter should not have started
expect(props.onBeforeEnter).not.toHaveBeenCalled()
expect(props.onEnter).not.toHaveBeenCalled()
expect(props.onAfterEnter).not.toHaveBeenCalled()
cbs.doneLeave[trueSerialized]()
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterLeave, trueSerialized)
// have to wait for a tick because this triggers an update
await nextTick()
expect(serializeInner(root)).toBe(falseSerialized)
// enter should start
expect(props.onBeforeEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeEnter, falseSerialized)
expect(props.onEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onEnter, falseSerialized)
expect(props.onAfterEnter).not.toHaveBeenCalled()
// finish enter
cbs.doneEnter[falseSerialized]()
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterEnter, falseSerialized)
unmount()
// toggle again after unmounted should not throw error
toggle.value = true
await nextTick()
expect(serializeInner(root)).toBe(`<!---->`)
assertCalls(props, {
onBeforeEnter: 1,
onEnter: 1,
onAfterEnter: 1,
onEnterCancelled: 0,
onBeforeLeave: 1,
onLeave: 1,
onAfterLeave: 1,
onLeaveCancelled: 0,
})
}
test('w/ elements', async () => {
await runTestWithElements(testOutIn)
})
test('w/ components', async () => {
await runTestWithComponents(testOutIn)
})
test('w/ KeepAlive', async () => {
await runTestWithKeepAlive(testOutIn)
})
})
describe('mode: "out-in" toggle before finish', () => {
async function testOutInBeforeFinish(
{ trueBranch, falseBranch, trueSerialized }: ToggleOptions,
withKeepAlive = false,
) {
const toggle = ref(true)
const { props, cbs } = mockProps({ mode: 'out-in' }, withKeepAlive)
const { root } = mount(
props,
() => (toggle.value ? trueBranch() : falseBranch()),
withKeepAlive,
)
// trigger toggle
toggle.value = false
await nextTick()
// toggle again before finish
toggle.value = true
await nextTick()
// expected behavior: the previous true branch is preserved,
// and a placeholder is injected for the replacement.
// the leaving node is replaced with the replace node (of the same branch)
// when it finishes leaving
expect(serializeInner(root)).toBe(`${trueSerialized}<!---->`)
// enter hooks should never be called (for neither branch)
expect(props.onBeforeEnter).not.toHaveBeenCalled()
expect(props.onEnter).not.toHaveBeenCalled()
expect(props.onAfterEnter).not.toHaveBeenCalled()
// finish leave
cbs.doneLeave[trueSerialized]()
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterLeave, trueSerialized)
await nextTick()
// leaving node and placeholder removed, enter node injected
expect(serializeInner(root)).toBe(trueSerialized)
// enter should start
expect(props.onBeforeEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeEnter, trueSerialized)
expect(props.onEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onEnter, trueSerialized)
expect(props.onAfterEnter).not.toHaveBeenCalled()
// finish enter
cbs.doneEnter[trueSerialized]()
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterEnter, trueSerialized)
assertCalls(props, {
onBeforeEnter: 1,
onEnter: 1,
onAfterEnter: 1,
onEnterCancelled: 0,
onBeforeLeave: 1,
onLeave: 1,
onAfterLeave: 1,
onLeaveCancelled: 0,
})
}
test('w/ elements', async () => {
await runTestWithElements(testOutInBeforeFinish)
})
test('w/ components', async () => {
await runTestWithComponents(testOutInBeforeFinish)
})
test('w/ KeepAlive', async () => {
await runTestWithKeepAlive(testOutInBeforeFinish)
})
})
describe('mode: "out-in" double quick toggle', () => {
async function testOutInDoubleToggle(
{
trueBranch,
falseBranch,
trueSerialized,
falseSerialized,
}: ToggleOptions,
withKeepAlive = false,
) {
const toggle = ref(true)
const { props, cbs } = mockProps({ mode: 'out-in' }, withKeepAlive)
const { root } = mount(
props,
() => (toggle.value ? trueBranch() : falseBranch()),
withKeepAlive,
)
// double quick toggle
toggle.value = false
await nextTick()
toggle.value = true
await nextTick()
toggle.value = false
await nextTick()
// expected behavior: the leaving true branch is preserved no matter
// how many times the state is toggled as long as the leave isn't finished
// yet. A placeholder is injected for the replacement.
expect(serializeInner(root)).toBe(`${trueSerialized}<!---->`)
// enter hooks should never be called (for neither branch)
expect(props.onBeforeEnter).not.toHaveBeenCalled()
expect(props.onEnter).not.toHaveBeenCalled()
expect(props.onAfterEnter).not.toHaveBeenCalled()
// finish leave
cbs.doneLeave[trueSerialized]()
expect(props.onAfterLeave).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterLeave, trueSerialized)
await nextTick()
// leaving node and placeholder removed, enter node injected
expect(serializeInner(root)).toBe(falseSerialized)
// enter should start
expect(props.onBeforeEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onBeforeEnter, falseSerialized)
expect(props.onEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onEnter, falseSerialized)
expect(props.onAfterEnter).not.toHaveBeenCalled()
// finish enter
cbs.doneEnter[falseSerialized]()
expect(props.onAfterEnter).toHaveBeenCalledTimes(1)
assertCalledWithEl(props.onAfterEnter, falseSerialized)
assertCalls(props, {
onBeforeEnter: 1,
onEnter: 1,
onAfterEnter: 1,
onEnterCancelled: 0,
onBeforeLeave: 1,
onLeave: 1,
onAfterLeave: 1,
onLeaveCancelled: 0,
})
}
test('w/ elements', async () => {
await runTestWithElements(testOutInDoubleToggle)
})
test('w/ components', async () => {
await runTestWithComponents(testOutInDoubleToggle)
})
test('w/ KeepAlive', async () => {