forked from vuejs/core
/
hmr.spec.ts
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/
hmr.spec.ts
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import { HMRRuntime } from '../src/hmr'
import '../src/hmr'
import { ComponentOptions, InternalRenderFunction } from '../src/component'
import {
render,
nodeOps,
h,
serializeInner,
triggerEvent,
TestElement,
nextTick
} from '@vue/runtime-test'
import * as runtimeTest from '@vue/runtime-test'
import { registerRuntimeCompiler, createApp } from '@vue/runtime-test'
import { baseCompile } from '@vue/compiler-core'
declare var __VUE_HMR_RUNTIME__: HMRRuntime
const { createRecord, rerender, reload } = __VUE_HMR_RUNTIME__
registerRuntimeCompiler(compileToFunction)
function compileToFunction(template: string) {
const { code } = baseCompile(template)
const render = new Function('Vue', code)(
runtimeTest
) as InternalRenderFunction
render._rc = true // isRuntimeCompiled
return render
}
describe('hot module replacement', () => {
test('inject global runtime', () => {
expect(createRecord).toBeDefined()
expect(rerender).toBeDefined()
expect(reload).toBeDefined()
})
test('createRecord', () => {
expect(createRecord('test1', {})).toBe(true)
// if id has already been created, should return false
expect(createRecord('test1', {})).toBe(false)
})
test('rerender', async () => {
const root = nodeOps.createElement('div')
const parentId = 'test2-parent'
const childId = 'test2-child'
const Child: ComponentOptions = {
__hmrId: childId,
render: compileToFunction(`<div><slot/></div>`)
}
createRecord(childId, Child)
const Parent: ComponentOptions = {
__hmrId: parentId,
data() {
return { count: 0 }
},
components: { Child },
render: compileToFunction(
`<div @click="count++">{{ count }}<Child>{{ count }}</Child></div>`
)
}
createRecord(parentId, Parent)
render(h(Parent), root)
expect(serializeInner(root)).toBe(`<div>0<div>0</div></div>`)
// Perform some state change. This change should be preserved after the
// re-render!
triggerEvent(root.children[0] as TestElement, 'click')
await nextTick()
expect(serializeInner(root)).toBe(`<div>1<div>1</div></div>`)
// // Update text while preserving state
rerender(
parentId,
compileToFunction(
`<div @click="count++">{{ count }}!<Child>{{ count }}</Child></div>`
)
)
expect(serializeInner(root)).toBe(`<div>1!<div>1</div></div>`)
// Should force child update on slot content change
rerender(
parentId,
compileToFunction(
`<div @click="count++">{{ count }}!<Child>{{ count }}!</Child></div>`
)
)
expect(serializeInner(root)).toBe(`<div>1!<div>1!</div></div>`)
// Should force update element children despite block optimization
rerender(
parentId,
compileToFunction(
`<div @click="count++">{{ count }}<span>{{ count }}</span>
<Child>{{ count }}!</Child>
</div>`
)
)
expect(serializeInner(root)).toBe(`<div>1<span>1</span><div>1!</div></div>`)
// Should force update child slot elements
rerender(
parentId,
compileToFunction(
`<div @click="count++">
<Child><span>{{ count }}</span></Child>
</div>`
)
)
expect(serializeInner(root)).toBe(`<div><div><span>1</span></div></div>`)
})
test('reload', async () => {
const root = nodeOps.createElement('div')
const childId = 'test3-child'
const unmountSpy = jest.fn()
const mountSpy = jest.fn()
const Child: ComponentOptions = {
__hmrId: childId,
data() {
return { count: 0 }
},
unmounted: unmountSpy,
render: compileToFunction(`<div @click="count++">{{ count }}</div>`)
}
createRecord(childId, Child)
const Parent: ComponentOptions = {
render: () => h(Child)
}
render(h(Parent), root)
expect(serializeInner(root)).toBe(`<div>0</div>`)
reload(childId, {
__hmrId: childId,
data() {
return { count: 1 }
},
mounted: mountSpy,
render: compileToFunction(`<div @click="count++">{{ count }}</div>`)
})
await nextTick()
expect(serializeInner(root)).toBe(`<div>1</div>`)
expect(unmountSpy).toHaveBeenCalledTimes(1)
expect(mountSpy).toHaveBeenCalledTimes(1)
})
// #7042
test('reload KeepAlive slot', async () => {
const root = nodeOps.createElement('div')
const childId = 'test-child-keep-alive'
const unmountSpy = jest.fn()
const mountSpy = jest.fn()
const activeSpy = jest.fn()
const deactiveSpy = jest.fn()
const Child: ComponentOptions = {
__hmrId: childId,
data() {
return { count: 0 }
},
unmounted: unmountSpy,
render: compileToFunction(`<div>{{ count }}</div>`)
}
createRecord(childId, Child)
const Parent: ComponentOptions = {
components: { Child },
data() {
return { toggle: true }
},
render: compileToFunction(
`<button @click="toggle = !toggle"></button><KeepAlive><Child v-if="toggle" /></KeepAlive>`
)
}
render(h(Parent), root)
expect(serializeInner(root)).toBe(`<button></button><div>0</div>`)
reload(childId, {
__hmrId: childId,
data() {
return { count: 1 }
},
mounted: mountSpy,
unmounted: unmountSpy,
activated: activeSpy,
deactivated: deactiveSpy,
render: compileToFunction(`<div>{{ count }}</div>`)
})
await nextTick()
expect(serializeInner(root)).toBe(`<button></button><div>1</div>`)
expect(unmountSpy).toHaveBeenCalledTimes(1)
expect(mountSpy).toHaveBeenCalledTimes(1)
expect(activeSpy).toHaveBeenCalledTimes(1)
expect(deactiveSpy).toHaveBeenCalledTimes(0)
// should not unmount when toggling
triggerEvent(root.children[1] as TestElement, 'click')
await nextTick()
expect(unmountSpy).toHaveBeenCalledTimes(1)
expect(mountSpy).toHaveBeenCalledTimes(1)
expect(activeSpy).toHaveBeenCalledTimes(1)
expect(deactiveSpy).toHaveBeenCalledTimes(1)
// should not mount when toggling
triggerEvent(root.children[1] as TestElement, 'click')
await nextTick()
expect(unmountSpy).toHaveBeenCalledTimes(1)
expect(mountSpy).toHaveBeenCalledTimes(1)
expect(activeSpy).toHaveBeenCalledTimes(2)
expect(deactiveSpy).toHaveBeenCalledTimes(1)
})
test('reload class component', async () => {
const root = nodeOps.createElement('div')
const childId = 'test4-child'
const unmountSpy = jest.fn()
const mountSpy = jest.fn()
class Child {
static __vccOpts: ComponentOptions = {
__hmrId: childId,
data() {
return { count: 0 }
},
unmounted: unmountSpy,
render: compileToFunction(`<div @click="count++">{{ count }}</div>`)
}
}
createRecord(childId, Child)
const Parent: ComponentOptions = {
render: () => h(Child)
}
render(h(Parent), root)
expect(serializeInner(root)).toBe(`<div>0</div>`)
class UpdatedChild {
static __vccOpts: ComponentOptions = {
__hmrId: childId,
data() {
return { count: 1 }
},
mounted: mountSpy,
render: compileToFunction(`<div @click="count++">{{ count }}</div>`)
}
}
reload(childId, UpdatedChild)
await nextTick()
expect(serializeInner(root)).toBe(`<div>1</div>`)
expect(unmountSpy).toHaveBeenCalledTimes(1)
expect(mountSpy).toHaveBeenCalledTimes(1)
})
// #1156 - static nodes should retain DOM element reference across updates
// when HMR is active
test('static el reference', async () => {
const root = nodeOps.createElement('div')
const id = 'test-static-el'
const template = `<div>
<div>{{ count }}</div>
<button @click="count++">++</button>
</div>`
const Comp: ComponentOptions = {
__hmrId: id,
data() {
return { count: 0 }
},
render: compileToFunction(template)
}
createRecord(id, Comp)
render(h(Comp), root)
expect(serializeInner(root)).toBe(
`<div><div>0</div><button>++</button></div>`
)
// 1. click to trigger update
triggerEvent((root as any).children[0].children[1], 'click')
await nextTick()
expect(serializeInner(root)).toBe(
`<div><div>1</div><button>++</button></div>`
)
// 2. trigger HMR
rerender(
id,
compileToFunction(template.replace(`<button`, `<button class="foo"`))
)
expect(serializeInner(root)).toBe(
`<div><div>1</div><button class="foo">++</button></div>`
)
})
// #1157 - component should force full props update when HMR is active
test('force update child component w/ static props', () => {
const root = nodeOps.createElement('div')
const parentId = 'test-force-props-parent'
const childId = 'test-force-props-child'
const Child: ComponentOptions = {
__hmrId: childId,
props: {
msg: String
},
render: compileToFunction(`<div>{{ msg }}</div>`)
}
createRecord(childId, Child)
const Parent: ComponentOptions = {
__hmrId: parentId,
components: { Child },
render: compileToFunction(`<Child msg="foo" />`)
}
createRecord(parentId, Parent)
render(h(Parent), root)
expect(serializeInner(root)).toBe(`<div>foo</div>`)
rerender(parentId, compileToFunction(`<Child msg="bar" />`))
expect(serializeInner(root)).toBe(`<div>bar</div>`)
})
// #1305 - component should remove class
test('remove static class from parent', () => {
const root = nodeOps.createElement('div')
const parentId = 'test-force-class-parent'
const childId = 'test-force-class-child'
const Child: ComponentOptions = {
__hmrId: childId,
render: compileToFunction(`<div>child</div>`)
}
createRecord(childId, Child)
const Parent: ComponentOptions = {
__hmrId: parentId,
components: { Child },
render: compileToFunction(`<Child class="test" />`)
}
createRecord(parentId, Parent)
render(h(Parent), root)
expect(serializeInner(root)).toBe(`<div class="test">child</div>`)
rerender(parentId, compileToFunction(`<Child/>`))
expect(serializeInner(root)).toBe(`<div>child</div>`)
})
test('rerender if any parent in the parent chain', () => {
const root = nodeOps.createElement('div')
const parent = 'test-force-props-parent-'
const childId = 'test-force-props-child'
const numberOfParents = 5
const Child: ComponentOptions = {
__hmrId: childId,
render: compileToFunction(`<div>child</div>`)
}
createRecord(childId, Child)
const components: ComponentOptions[] = []
for (let i = 0; i < numberOfParents; i++) {
const parentId = `${parent}${i}`
const parentComp: ComponentOptions = {
__hmrId: parentId
}
components.push(parentComp)
if (i === 0) {
parentComp.render = compileToFunction(`<Child />`)
parentComp.components = {
Child
}
} else {
parentComp.render = compileToFunction(`<Parent />`)
parentComp.components = {
Parent: components[i - 1]
}
}
createRecord(parentId, parentComp)
}
const last = components[components.length - 1]
render(h(last), root)
expect(serializeInner(root)).toBe(`<div>child</div>`)
rerender(last.__hmrId!, compileToFunction(`<Parent class="test"/>`))
expect(serializeInner(root)).toBe(`<div class="test">child</div>`)
})
// #3302
test('rerender with Teleport', () => {
const root = nodeOps.createElement('div')
const target = nodeOps.createElement('div')
const parentId = 'parent-teleport'
const Child: ComponentOptions = {
data() {
return {
// style is used to ensure that the div tag will be tracked by Teleport
style: {},
target
}
},
render: compileToFunction(`
<teleport :to="target">
<div :style="style">
<slot/>
</div>
</teleport>
`)
}
const Parent: ComponentOptions = {
__hmrId: parentId,
components: { Child },
render: compileToFunction(`
<Child>
<template #default>
<div>1</div>
</template>
</Child>
`)
}
createRecord(parentId, Parent)
render(h(Parent), root)
expect(serializeInner(root)).toBe(
`<!--teleport start--><!--teleport end-->`
)
expect(serializeInner(target)).toBe(`<div style={}><div>1</div></div>`)
rerender(
parentId,
compileToFunction(`
<Child>
<template #default>
<div>1</div>
<div>2</div>
</template>
</Child>
`)
)
expect(serializeInner(root)).toBe(
`<!--teleport start--><!--teleport end-->`
)
expect(serializeInner(target)).toBe(
`<div style={}><div>1</div><div>2</div></div>`
)
})
// #4174
test('with global mixins', async () => {
const childId = 'hmr-global-mixin'
const createSpy1 = jest.fn()
const createSpy2 = jest.fn()
const Child: ComponentOptions = {
__hmrId: childId,
created: createSpy1,
render() {
return h('div')
}
}
createRecord(childId, Child)
const Parent: ComponentOptions = {
render: () => h(Child)
}
const app = createApp(Parent)
app.mixin({})
const root = nodeOps.createElement('div')
app.mount(root)
expect(createSpy1).toHaveBeenCalledTimes(1)
expect(createSpy2).toHaveBeenCalledTimes(0)
reload(childId, {
__hmrId: childId,
created: createSpy2,
render() {
return h('div')
}
})
await nextTick()
expect(createSpy1).toHaveBeenCalledTimes(1)
expect(createSpy2).toHaveBeenCalledTimes(1)
})
// #4757
test('rerender for component that has no active instance yet', () => {
const id = 'no-active-instance-rerender'
const Foo: ComponentOptions = {
__hmrId: id,
render: () => 'foo'
}
createRecord(id, Foo)
rerender(id, () => 'bar')
const root = nodeOps.createElement('div')
render(h(Foo), root)
expect(serializeInner(root)).toBe('bar')
})
test('reload for component that has no active instance yet', () => {
const id = 'no-active-instance-reload'
const Foo: ComponentOptions = {
__hmrId: id,
render: () => 'foo'
}
createRecord(id, Foo)
reload(id, {
__hmrId: id,
render: () => 'bar'
})
const root = nodeOps.createElement('div')
render(h(Foo), root)
expect(serializeInner(root)).toBe('bar')
})
})