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| /** | ||
| * Copyright (c) Facebook, Inc. and its affiliates. | ||
| * | ||
| * This source code is licensed under the MIT license found in the | ||
| * LICENSE file in the root directory of this source tree. | ||
| * | ||
| * @emails react-core | ||
| */ | ||
|
|
||
| let JSDOM; | ||
| let React; | ||
| let ReactDOM; | ||
| let clientAct; | ||
| let ReactDOMFizzServer; | ||
| let Stream; | ||
| let useId; | ||
| let useRef; | ||
| let useEffect; | ||
| let document; | ||
| let writable; | ||
| let container; | ||
| let buffer = ''; | ||
| let hasErrored = false; | ||
| let fatalError = undefined; | ||
|
|
||
| describe('useId', () => { | ||
| beforeEach(() => { | ||
| jest.resetModules(); | ||
| JSDOM = require('jsdom').JSDOM; | ||
| React = require('react'); | ||
| ReactDOM = require('react-dom'); | ||
| clientAct = require('jest-react').act; | ||
| ReactDOMFizzServer = require('react-dom/server'); | ||
| Stream = require('stream'); | ||
| // TODO: Rename API | ||
| useId = React.unstable_useId; | ||
| useRef = React.useRef; | ||
| useEffect = React.useEffect; | ||
|
|
||
| // Test Environment | ||
| const jsdom = new JSDOM( | ||
| '<!DOCTYPE html><html><head></head><body><div id="container">', | ||
| { | ||
| runScripts: 'dangerously', | ||
| }, | ||
| ); | ||
| document = jsdom.window.document; | ||
| container = document.getElementById('container'); | ||
|
|
||
| buffer = ''; | ||
| hasErrored = false; | ||
|
|
||
| writable = new Stream.PassThrough(); | ||
| writable.setEncoding('utf8'); | ||
| writable.on('data', chunk => { | ||
| buffer += chunk; | ||
| }); | ||
| writable.on('error', error => { | ||
| hasErrored = true; | ||
| fatalError = error; | ||
| }); | ||
| }); | ||
|
|
||
| async function serverAct(callback) { | ||
| await callback(); | ||
| // Await one turn around the event loop. | ||
| // This assumes that we'll flush everything we have so far. | ||
| await new Promise(resolve => { | ||
| setImmediate(resolve); | ||
| }); | ||
| if (hasErrored) { | ||
| throw fatalError; | ||
| } | ||
| // JSDOM doesn't support stream HTML parser so we need to give it a proper fragment. | ||
| // We also want to execute any scripts that are embedded. | ||
| // We assume that we have now received a proper fragment of HTML. | ||
| const bufferedContent = buffer; | ||
| buffer = ''; | ||
| const fakeBody = document.createElement('body'); | ||
| fakeBody.innerHTML = bufferedContent; | ||
| while (fakeBody.firstChild) { | ||
| const node = fakeBody.firstChild; | ||
| if (node.nodeName === 'SCRIPT') { | ||
| const script = document.createElement('script'); | ||
| script.textContent = node.textContent; | ||
| fakeBody.removeChild(node); | ||
| container.appendChild(script); | ||
| } else { | ||
| container.appendChild(node); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| function DivWithId({label, children}) { | ||
| const id = useId(); | ||
| const ref = useRef(null); | ||
| useEffect(() => { | ||
| const div = ref.current; | ||
| if (div !== null) { | ||
| if (div.id !== id) { | ||
| throw new Error('Server and client ids do not match'); | ||
| } | ||
| } | ||
| }, [id]); | ||
| return ( | ||
| <div ref={ref} id={id}> | ||
| {children} | ||
| </div> | ||
| ); | ||
| } | ||
|
|
||
| test('basic usage', async () => { | ||
| function App() { | ||
| return ( | ||
| <div> | ||
| <div> | ||
| <DivWithId label="A" /> | ||
| <DivWithId label="B" /> | ||
| </div> | ||
| <DivWithId label="C" /> | ||
| </div> | ||
| ); | ||
| } | ||
|
|
||
| await serverAct(async () => { | ||
| const {pipe} = ReactDOMFizzServer.renderToPipeableStream(<App />); | ||
| pipe(writable); | ||
| }); | ||
|
|
||
| await clientAct(async () => { | ||
| ReactDOM.hydrateRoot(container, <App />); | ||
| }); | ||
| }); | ||
| }); |
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