ReactCompositeComponent-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 ChildUpdates;
let MorphingComponent;
let React;
let ReactDOM;
let ReactDOMClient;
let ReactSharedInternals;
let Scheduler;
let assertLog;
let act;
let assertConsoleErrorDev;

describe('ReactCompositeComponent', () => {
  const hasOwnProperty = Object.prototype.hasOwnProperty;

  /**
   * Performs equality by iterating through keys on an object and returning false
   * when any key has values which are not strictly equal between the arguments.
   * Returns true when the values of all keys are strictly equal.
   */
  function shallowEqual(objA: mixed, objB: mixed): boolean {
    if (Object.is(objA, objB)) {
      return true;
    }
    if (
      typeof objA !== 'object' ||
      objA === null ||
      typeof objB !== 'object' ||
      objB === null
    ) {
      return false;
    }
    const keysA = Object.keys(objA);
    const keysB = Object.keys(objB);
    if (keysA.length !== keysB.length) {
      return false;
    }
    for (let i = 0; i < keysA.length; i++) {
      if (
        !hasOwnProperty.call(objB, keysA[i]) ||
        !Object.is(objA[keysA[i]], objB[keysA[i]])
      ) {
        return false;
      }
    }
    return true;
  }

  function shallowCompare(instance, nextProps, nextState) {
    return (
// ... (1354 more lines)