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https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Ricky
30e2938e04
## Overview Sets `resetModules: true` in the base Jest config, and deletes all the `jest.resetModule()` calls we don't need.
78 lines
2.0 KiB
JavaScript
78 lines
2.0 KiB
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @emails react-core
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*/
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'use strict';
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// Polyfills for test environment
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global.ReadableStream =
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require('web-streams-polyfill/ponyfill/es6').ReadableStream;
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global.TextEncoder = require('util').TextEncoder;
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global.AsyncLocalStorage = require('async_hooks').AsyncLocalStorage;
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let React;
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let ReactDOM;
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let ReactDOMFizzServer;
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describe('ReactDOMFizzServerEdge', () => {
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beforeEach(() => {
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jest.useRealTimers();
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React = require('react');
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ReactDOM = require('react-dom');
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ReactDOMFizzServer = require('react-dom/server.edge');
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});
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async function readResult(stream) {
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const reader = stream.getReader();
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let result = '';
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while (true) {
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const {done, value} = await reader.read();
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if (done) {
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return result;
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}
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result += Buffer.from(value).toString('utf8');
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}
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}
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// https://github.com/facebook/react/issues/27540
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it('does not try to write to the stream after it has been closed', async () => {
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async function preloadLate() {
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await 1;
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await 1;
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// need to wait a few microtasks to get the stream to close before this is called
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ReactDOM.preconnect('foo');
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}
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function Preload() {
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preloadLate();
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return null;
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}
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function App() {
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return (
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<html>
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<body>
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<main>hello</main>
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<Preload />
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</body>
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</html>
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);
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}
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const stream = await ReactDOMFizzServer.renderToReadableStream(<App />);
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const result = await readResult(stream);
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// need to wait a macrotask to let the scheduled work from the preconnect to execute
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await new Promise(resolve => {
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setTimeout(resolve, 1);
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});
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expect(result).toMatchInlineSnapshot(
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`"<!DOCTYPE html><html><head></head><body><main>hello</main></body></html>"`,
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);
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});
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});
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