ReactFragment-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
 * @jest-environment node
 */
'use strict';

let React;
let ReactNoop;
let waitForAll;
let assertConsoleErrorDev;

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

    React = require('react');
    ReactNoop = require('react-noop-renderer');

    const InternalTestUtils = require('internal-test-utils');
    waitForAll = InternalTestUtils.waitForAll;
    assertConsoleErrorDev = InternalTestUtils.assertConsoleErrorDev;
  });

  it('should render a single child via noop renderer', async () => {
    const element = (
      <>
        <span>foo</span>
      </>
    );

    ReactNoop.render(element);
    await waitForAll([]);

    expect(ReactNoop).toMatchRenderedOutput(<span>foo</span>);
  });

  it('should render zero children via noop renderer', async () => {
    const element = <React.Fragment />;

    ReactNoop.render(element);
    await waitForAll([]);

    expect(ReactNoop).toMatchRenderedOutput(null);
  });

  it('should render multiple children via noop renderer', async () => {
    const element = (
      <>
        hello <span>world</span>
      </>
    );

    ReactNoop.render(element);
    await waitForAll([]);

// ... (971 more lines)