ReactClassComponentPropResolution-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 ReactNoop;
let Scheduler;
let act;
let assertLog;

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

    React = require('react');
    ReactNoop = require('react-noop-renderer');
    Scheduler = require('scheduler');
    act = require('internal-test-utils').act;
    assertLog = require('internal-test-utils').assertLog;
  });

  function Text({text}) {
    Scheduler.log(text);
    return text;
  }

  it('resolves ref and default props before calling lifecycle methods', async () => {
    const root = ReactNoop.createRoot();

    function getPropKeys(props) {
      return Object.keys(props).join(', ');
    }

    class Component extends React.Component {
      constructor(props) {
        super(props);
        Scheduler.log('constructor: ' + getPropKeys(props));
      }
      shouldComponentUpdate(props) {
        Scheduler.log(
          'shouldComponentUpdate (prev props): ' + getPropKeys(this.props),
        );
        Scheduler.log(
          'shouldComponentUpdate (next props): ' + getPropKeys(props),
        );
        return true;
      }
      componentDidUpdate(props) {
        Scheduler.log('componentDidUpdate (prev props): ' + getPropKeys(props));
        Scheduler.log(
          'componentDidUpdate (next props): ' + getPropKeys(this.props),
        );
        return true;
// ... (74 more lines)