ReactDOMSuspensePlaceholder-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
 */

'use strict';

let React;
let ReactDOM;
let findDOMNode;
let ReactDOMClient;
let Suspense;
let Scheduler;
let act;
let textCache;
let assertLog;

describe('ReactDOMSuspensePlaceholder', () => {
  let container;

  beforeEach(() => {
    jest.resetModules();
    React = require('react');
    ReactDOM = require('react-dom');
    ReactDOMClient = require('react-dom/client');
    findDOMNode =
      ReactDOM.__DOM_INTERNALS_DO_NOT_USE_OR_WARN_USERS_THEY_CANNOT_UPGRADE
        .findDOMNode;
    Scheduler = require('scheduler');
    act = require('internal-test-utils').act;
    assertLog = require('internal-test-utils').assertLog;
    Suspense = React.Suspense;
    container = document.createElement('div');
    document.body.appendChild(container);

    textCache = new Map();
  });

  afterEach(() => {
    document.body.removeChild(container);
  });

  function resolveText(text) {
    const record = textCache.get(text);
    if (record === undefined) {
      const newRecord = {
        status: 'resolved',
        value: text,
      };
      textCache.set(text, newRecord);
    } else if (record.status === 'pending') {
      const thenable = record.value;
      record.status = 'resolved';
      record.value = text;
      thenable.pings.forEach(t => t());
    }
// ... (286 more lines)