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chore: backport 10.12.x to v11 (#4255)
* backport #3871 * port test from #3884 functionality seems to work in v11 * backport #3880 * backport #3875 * backport #3862 * add todo for #3801 * backport #3868 * backport #3867 * backport #3863 * add todo for #3856 * backport #3844 * backport #3816 * backport #3888 * backport #3889
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| import { setupRerender } from 'preact/test-utils'; | ||
| import { setupScratch, teardown } from '../../../test/_util/helpers'; | ||
| import React, { | ||
| render, | ||
| createElement, | ||
| createContext, | ||
| Component, | ||
| useState, | ||
| useContext | ||
| } from 'preact/compat'; | ||
|
|
||
| describe('components', () => { | ||
| /** @type {HTMLDivElement} */ | ||
| let scratch; | ||
|
|
||
| /** @type {() => void} */ | ||
| let rerender; | ||
|
|
||
| beforeEach(() => { | ||
| scratch = setupScratch(); | ||
| rerender = setupRerender(); | ||
| }); | ||
|
|
||
| afterEach(() => { | ||
| teardown(scratch); | ||
| }); | ||
|
|
||
| it('nested context updates propagate throughout the tree synchronously', () => { | ||
| const RouterContext = createContext({ location: '__default_value__' }); | ||
|
|
||
| const route1 = '/page/1'; | ||
| const route2 = '/page/2'; | ||
|
|
||
| /** @type {() => void} */ | ||
| let toggleLocalState; | ||
| /** @type {() => void} */ | ||
| let toggleLocation; | ||
|
|
||
| /** @type {Array<{location: string, localState: boolean}>} */ | ||
| let pageRenders = []; | ||
|
|
||
| function runUpdate() { | ||
| toggleLocalState(); | ||
| toggleLocation(); | ||
| } | ||
|
|
||
| /** | ||
| * @extends {React.Component<{children: any}, {location: string}>} | ||
| */ | ||
| class Router extends Component { | ||
| constructor(props) { | ||
| super(props); | ||
| this.state = { location: route1 }; | ||
| toggleLocation = () => { | ||
| const oldLocation = this.state.location; | ||
| const newLocation = oldLocation === route1 ? route2 : route1; | ||
| // console.log('Toggling location', oldLocation, '->', newLocation); | ||
| this.setState({ location: newLocation }); | ||
| }; | ||
| } | ||
|
|
||
| render() { | ||
| // console.log('Rendering Router', { location: this.state.location }); | ||
| return ( | ||
| <RouterContext.Provider value={{ location: this.state.location }}> | ||
| {this.props.children} | ||
| </RouterContext.Provider> | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * @extends {React.Component<{children: any}>} | ||
| */ | ||
| class Route extends Component { | ||
| render() { | ||
| return ( | ||
| <RouterContext.Consumer> | ||
| {(contextValue) => { | ||
| // console.log('Rendering Route', { | ||
| // location: contextValue.location | ||
| // }); | ||
| // Pretend to do something with the context value | ||
| const newContextValue = { ...contextValue }; | ||
| return ( | ||
| <RouterContext.Provider value={newContextValue}> | ||
| {this.props.children} | ||
| </RouterContext.Provider> | ||
| ); | ||
| }} | ||
| </RouterContext.Consumer> | ||
| ); | ||
| } | ||
| } | ||
|
|
||
| function Page() { | ||
| const [localState, setLocalState] = useState(true); | ||
| const { location } = useContext(RouterContext); | ||
|
|
||
| pageRenders.push({ location, localState }); | ||
| // console.log('Rendering Page', { location, localState }); | ||
|
|
||
| toggleLocalState = () => { | ||
| let newValue = !localState; | ||
| // console.log('Toggling localState', localState, '->', newValue); | ||
| setLocalState(newValue); | ||
| }; | ||
|
|
||
| return ( | ||
| <> | ||
| <div>localState: {localState.toString()}</div> | ||
| <div>location: {location}</div> | ||
| <div> | ||
| <button type="button" onClick={runUpdate}> | ||
| Trigger update | ||
| </button> | ||
| </div> | ||
| </> | ||
| ); | ||
| } | ||
|
|
||
| function App() { | ||
| return ( | ||
| <Router> | ||
| <Route> | ||
| <Page /> | ||
| </Route> | ||
| </Router> | ||
| ); | ||
| } | ||
|
|
||
| render(<App />, scratch); | ||
| expect(pageRenders).to.deep.equal([{ location: route1, localState: true }]); | ||
|
|
||
| pageRenders = []; | ||
| runUpdate(); // Simulate button click | ||
| rerender(); | ||
|
|
||
| // Page should rerender once with both propagated context and local state updates | ||
| expect(pageRenders).to.deep.equal([ | ||
| { location: route2, localState: false } | ||
| ]); | ||
| }); | ||
| }); |
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