ReactTransition-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 Suspense;
let useState;
let useLayoutEffect;
let useTransition;
let startTransition;
let act;
let getCacheForType;
let waitForAll;
let waitFor;
let waitForPaint;
let assertLog;

let caches;
let seededCache;

describe('ReactTransition', () => {
  beforeEach(() => {
    jest.resetModules();
    React = require('react');
    ReactNoop = require('react-noop-renderer');
    Scheduler = require('scheduler');
    useState = React.useState;
    useLayoutEffect = React.useLayoutEffect;
    useTransition = React.useTransition;
    Suspense = React.Suspense;
    startTransition = React.startTransition;
    getCacheForType = React.unstable_getCacheForType;
    act = require('internal-test-utils').act;

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

    caches = [];
    seededCache = null;
  });

  function createTextCache() {
    if (seededCache !== null) {
      // Trick to seed a cache before it exists.
      // TODO: Need a built-in API to seed data before the initial render (i.e.
      // not a refresh because nothing has mounted yet).
      const cache = seededCache;
// ... (1236 more lines)