ReactSuspenseList-test.js — react Source File

Source Code

/**
 * Copyright (c) Meta Platforms, Inc. and 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
 * @jest-environment node
 */

let React;
let ReactNoop;
let Scheduler;
let act;
let Profiler;
let Suspense;
let SuspenseList;
let waitForAll;
let assertLog;
let waitFor;
let assertConsoleErrorDev;

describe('ReactSuspenseList', () => {
  beforeEach(() => {
    jest.resetModules();

    React = require('react');
    ReactNoop = require('react-noop-renderer');
    Scheduler = require('scheduler');
    Profiler = React.Profiler;
    Suspense = React.Suspense;
    if (gate(flags => flags.enableSuspenseList)) {
      SuspenseList = React.unstable_SuspenseList;
    }

    const InternalTestUtils = require('internal-test-utils');
    waitForAll = InternalTestUtils.waitForAll;
    assertLog = InternalTestUtils.assertLog;
    waitFor = InternalTestUtils.waitFor;
    act = InternalTestUtils.act;
    assertConsoleErrorDev = InternalTestUtils.assertConsoleErrorDev;
  });

  function Text(props) {
    Scheduler.log(props.text);
    return <span>{props.text}</span>;
  }

  function createAsyncText(text) {
    let resolved = false;
    const Component = function () {
      if (!resolved) {
        Scheduler.log('Suspend! [' + text + ']');
        throw promise;
      }
      return <Text text={text} />;
    };
    const promise = new Promise(resolve => {
      Component.resolve = function () {
        resolved = true;
// ... (3680 more lines)