/**

 * 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.

 *

 * @jest-environment node

 */

'use strict';

describe('ReactIncrementalErrorReplay-test', () => {

  const React = require('react');

  const ReactTestRenderer = require('react-test-renderer');

  it('copies all keys when stashing potentially failing work', () => {

    // Note: this test is fragile and relies on internals.

    // We almost always try to avoid such tests, but here the cost of

    // the list getting out of sync (and causing subtle bugs in rare cases)

    // is higher than the cost of maintaining the test.

    // This is the method we're going to test.

    // If this is no longer used, you can delete this test file.;

    const {assignFiberPropertiesInDEV} = require('../ReactFiber');

    // Get a real fiber.

    const realFiber = ReactTestRenderer.create(<div />).root._currentFiber();

    const stash = assignFiberPropertiesInDEV(null, realFiber);

    // Verify we get all the same fields.

    expect(realFiber).toEqual(stash);

    // Mutate the original.

    for (const key in realFiber) {

      realFiber[key] = key + '_' + Math.random();

    }

    expect(realFiber).not.toEqual(stash);

    // Verify we can still "revert" to the stashed properties.

    expect(assignFiberPropertiesInDEV(realFiber, stash)).toBe(realFiber);

    expect(realFiber).toEqual(stash);

  });

});