vue3-yuanma/packages/runtime-core/__tests__/rendererSuspense.spec.ts
2019-09-11 11:10:13 -04:00

128 lines
2.8 KiB
TypeScript

import {
h,
ref,
Suspense,
ComponentOptions,
render,
nodeOps,
serializeInner,
nextTick
} from '@vue/runtime-test'
describe('renderer: suspense', () => {
it('basic usage (nested + multiple deps)', async () => {
const msg = ref('hello')
const deps: Promise<any>[] = []
const createAsyncComponent = (loader: () => Promise<ComponentOptions>) => ({
async setup(props: any, { slots }: any) {
const p = loader()
deps.push(p)
const Inner = await p
return () => h(Inner, props, slots)
}
})
const AsyncChild = createAsyncComponent(
() =>
new Promise(resolve => {
setTimeout(() => {
resolve({
setup(props: { msg: string }) {
return () => h('div', props.msg)
}
})
}, 0)
})
)
const AsyncChild2 = createAsyncComponent(
() =>
new Promise(resolve => {
setTimeout(() => {
resolve({
setup(props: { msg: string }) {
return () => h('div', props.msg)
}
})
}, 10)
})
)
const Mid = {
setup() {
return () =>
h(AsyncChild, {
msg: msg.value
})
}
}
const Comp = {
setup() {
return () =>
h(Suspense, [msg.value, h(Mid), h(AsyncChild2, { msg: 'child 2' })])
}
}
const root = nodeOps.createElement('div')
render(h(Comp), root)
expect(serializeInner(root)).toBe(`<!---->`)
await Promise.all(deps)
await nextTick()
expect(serializeInner(root)).toBe(
`<!---->hello<div>hello</div><div>child 2</div><!---->`
)
})
test('fallback content', async () => {
const deps: Promise<any>[] = []
const Async = {
async setup() {
const p = new Promise(r => setTimeout(r, 1))
deps.push(p)
await p
// test resume for returning bindings
return {
msg: 'async'
}
},
render(this: any) {
return h('div', this.msg)
}
}
const Comp = {
setup() {
return () =>
h(Suspense, null, {
default: h(Async),
fallback: h('div', 'fallback')
})
}
}
const root = nodeOps.createElement('div')
render(h(Comp), root)
expect(serializeInner(root)).toBe(`<div>fallback</div>`)
await Promise.all(deps)
await nextTick()
expect(serializeInner(root)).toBe(`<div>async</div>`)
})
test.todo('buffer mounted/updated hooks & watch callbacks')
test.todo('content update before suspense resolve')
test.todo('unmount before suspense resolve')
test.todo('nested suspense')
test.todo('error handling')
test.todo('portal inside suspense')
})