ReactEmptyComponent-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 TogglingComponent;
let act;
let Scheduler;
let assertLog;
let assertConsoleErrorDev;

let container;

describe('ReactEmptyComponent', () => {
  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');
    const InternalTestUtils = require('internal-test-utils');
    act = InternalTestUtils.act;
    assertLog = InternalTestUtils.assertLog;
    assertConsoleErrorDev = InternalTestUtils.assertConsoleErrorDev;

    container = document.createElement('div');

    TogglingComponent = class extends React.Component {
      state = {component: this.props.firstComponent};

      componentDidMount() {
        Scheduler.log('mount ' + findDOMNode(this)?.nodeName);
        this.setState({component: this.props.secondComponent});
      }

      componentDidUpdate() {
        Scheduler.log('update ' + findDOMNode(this)?.nodeName);
      }

      render() {
        const Component = this.state.component;
        return Component ? <Component /> : null;
      }
    };
  });

// ... (341 more lines)