ReactLegacyContextDisabled-test.internal.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 ReactDOMClient;
let ReactDOMServer;
let ReactFeatureFlags;
let act;
let assertConsoleErrorDev;

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

    React = require('react');
    ReactDOMClient = require('react-dom/client');
    ReactDOMServer = require('react-dom/server');
    ReactFeatureFlags = require('shared/ReactFeatureFlags');
    ReactFeatureFlags.disableLegacyContext = true;
    act = require('internal-test-utils').act;
    assertConsoleErrorDev =
      require('internal-test-utils').assertConsoleErrorDev;
  });

  function formatValue(val) {
    if (val === null) {
      return 'null';
    }
    if (val === undefined) {
      return 'undefined';
    }
    if (typeof val === 'string') {
      return val;
    }
    return JSON.stringify(val);
  }

  it('warns for legacy context', async () => {
    class LegacyProvider extends React.Component {
      static childContextTypes = {
        foo() {},
      };
      getChildContext() {
        return {foo: 10};
      }
      render() {
        return this.props.children;
      }
    }

    const lifecycleContextLog = [];
    class LegacyClsConsumer extends React.Component {
// ... (186 more lines)