forked from vuejs/core
/
useCssVars.spec.ts
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/
useCssVars.spec.ts
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import {
ref,
render,
useCssVars,
createStaticVNode,
h,
reactive,
nextTick,
ComponentOptions,
Suspense,
Teleport,
FunctionalComponent
} from '@vue/runtime-dom'
describe('useCssVars', () => {
async function assertCssVars(getApp: (state: any) => ComponentOptions) {
const state = reactive({ color: 'red' })
const App = getApp(state)
const root = document.createElement('div')
render(h(App), root)
await nextTick()
for (const c of [].slice.call(root.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe(`red`)
}
state.color = 'green'
await nextTick()
for (const c of [].slice.call(root.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe('green')
}
}
test('basic', async () => {
await assertCssVars(state => ({
setup() {
// test receiving render context
useCssVars((ctx: any) => ({
color: ctx.color
}))
return state
},
render() {
return h('div')
}
}))
})
test('on fragment root', async () => {
await assertCssVars(state => ({
setup() {
useCssVars(() => state)
return () => [h('div'), h('div')]
}
}))
})
test('on HOCs', async () => {
const Child = () => [h('div'), h('div')]
await assertCssVars(state => ({
setup() {
useCssVars(() => state)
return () => h(Child)
}
}))
})
test('on suspense root', async () => {
const state = reactive({ color: 'red' })
const root = document.createElement('div')
let resolveAsync: any
let asyncPromise: any
const AsyncComp = {
setup() {
asyncPromise = new Promise(r => {
resolveAsync = () => {
r(() => h('p', 'default'))
}
})
return asyncPromise
}
}
const App = {
setup() {
useCssVars(() => state)
return () =>
h(Suspense, null, {
default: h(AsyncComp),
fallback: h('div', 'fallback')
})
}
}
render(h(App), root)
await nextTick()
// css vars use with fallback tree
for (const c of [].slice.call(root.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe(`red`)
}
// AsyncComp resolve
resolveAsync()
await asyncPromise.then(() => {})
// Suspense effects flush
await nextTick()
// css vars use with default tree
for (const c of [].slice.call(root.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe(`red`)
}
state.color = 'green'
await nextTick()
for (const c of [].slice.call(root.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe('green')
}
})
test('with subTree changed', async () => {
const state = reactive({ color: 'red' })
const value = ref(true)
const root = document.createElement('div')
const App = {
setup() {
useCssVars(() => state)
return () => (value.value ? [h('div')] : [h('div'), h('div')])
}
}
render(h(App), root)
await nextTick()
// css vars use with fallback tree
for (const c of [].slice.call(root.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe(`red`)
}
value.value = false
await nextTick()
for (const c of [].slice.call(root.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe('red')
}
})
// #3894
test('with subTree change inside HOC', async () => {
const state = reactive({ color: 'red' })
const value = ref(true)
const root = document.createElement('div')
const Child: FunctionalComponent = (_, { slots }) => slots.default!()
const App = {
setup() {
useCssVars(() => state)
return () =>
h(Child, null, () =>
value.value ? [h('div')] : [h('div'), h('div')]
)
}
}
render(h(App), root)
await nextTick()
// css vars use with fallback tree
for (const c of [].slice.call(root.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe(`red`)
}
value.value = false
await nextTick()
for (const c of [].slice.call(root.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe('red')
}
})
test('with createStaticVNode', async () => {
const state = reactive({ color: 'red' })
const root = document.createElement('div')
const App = {
setup() {
useCssVars(() => state)
return () => [
h('div'),
createStaticVNode('<div>1</div><div><span>2</span></div>', 2),
h('div')
]
}
}
render(h(App), root)
await nextTick()
for (const c of [].slice.call(root.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe('red')
}
})
test('with teleport', async () => {
document.body.innerHTML = ''
const state = reactive({ color: 'red' })
const root = document.createElement('div')
const target = document.body
const App = {
setup() {
useCssVars(() => state)
return () => [h(Teleport, { to: target }, [h('div')])]
}
}
render(h(App), root)
await nextTick()
for (const c of [].slice.call(target.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe('red')
}
})
test('with teleport(change subTree)', async () => {
document.body.innerHTML = ''
const state = reactive({ color: 'red' })
const root = document.createElement('div')
const target = document.body
const toggle = ref(false)
const App = {
setup() {
useCssVars(() => state)
return () => [
h(Teleport, { to: target }, [
h('div'),
toggle.value ? h('div') : null
])
]
}
}
render(h(App), root)
await nextTick()
expect(target.children.length).toBe(1)
for (const c of [].slice.call(target.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe('red')
}
toggle.value = true
await nextTick()
expect(target.children.length).toBe(2)
for (const c of [].slice.call(target.children as any)) {
expect((c as HTMLElement).style.getPropertyValue(`--color`)).toBe('red')
}
})
})