jest/e2e/__tests__/watch-plugins.test.ts

/**
 * 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.
 */
import {runContinuous} from '../runJest';

const testCompletedRE = /Ran all test suites./g;
const numberOfTestRuns = (stderr: string): number => {
  const matches = stderr.match(testCompletedRE);
  return matches ? matches.length : 0;
};

test.each(['js', 'cjs'])('supports %s watch plugins', async watchPluginDir => {
  const testRun = runContinuous(`watch-plugins/${watchPluginDir}`, [
    '--watchAll',
    '--no-watchman',
  ]);

  await testRun.waitUntil(({stderr}) => numberOfTestRuns(stderr) === 1);

  expect(testRun.getCurrentOutput().stdout.trim()).toBe('getUsageInfo');

  await testRun.end();
});

test.each(['mjs', 'js-type-module'])(
  'supports %s watch plugins',
  async watchPluginDir => {
    const testRun = runContinuous(`watch-plugins/${watchPluginDir}`, [
      '--watchAll',
      '--no-watchman',
    ]);

    await testRun.waitUntil(({stderr}) => numberOfTestRuns(stderr) === 1);

    expect(testRun.getCurrentOutput().stdout.trim()).toBe('getUsageInfo');

    await testRun.end();
  },
);