ReactSchedulerIntegration-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
 */

'use strict';

let React;
let ReactNoop;
let Scheduler;
let act;
let NormalPriority;
let IdlePriority;
let runWithPriority;
let startTransition;
let waitForAll;
let waitForPaint;
let assertLog;
let waitFor;

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

    React = require('react');
    ReactNoop = require('react-noop-renderer');
    Scheduler = require('scheduler');
    act = require('internal-test-utils').act;
    NormalPriority = Scheduler.unstable_NormalPriority;
    IdlePriority = Scheduler.unstable_IdlePriority;
    runWithPriority = Scheduler.unstable_runWithPriority;
    startTransition = React.startTransition;

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

  // Note: This is based on a similar component we use in www. We can delete
  // once the extra div wrapper is no longer necessary.
  function LegacyHiddenDiv({children, mode}) {
    return (
      <div hidden={mode === 'hidden'}>
        <React.unstable_LegacyHidden
          mode={mode === 'hidden' ? 'unstable-defer-without-hiding' : mode}>
          {children}
        </React.unstable_LegacyHidden>
      </div>
    );
  }

  it('passive effects are called before Normal-pri scheduled in layout effects', async () => {
    const {useEffect, useLayoutEffect} = React;
// ... (332 more lines)