jest/e2e/__tests__/onlyFailuresNonWatch.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 {tmpdir} from 'os';
import * as path from 'path';
import * as fs from 'graceful-fs';
import {cleanup, writeFiles} from '../Utils';
import runJest from '../runJest';

const DIR = path.resolve(tmpdir(), 'non-watch-mode-onlyFailures');

beforeEach(() => cleanup(DIR));
afterEach(() => cleanup(DIR));

const failedTestContents = [
  {
    content: {
      '__tests__/a.js': `
    test('bar', () => { expect('bar').toBe('foo'); });
    `,
      '__tests__/b.js': `
    test('foo', () => { expect('foo').toBe('foo'); });
    `,
      'package.json': JSON.stringify({
        jest: {
          testEnvironment: 'node',
        },
      }),
    },
    name: 'failed test logic from bar != foo',
  },
  {
    content: {
      '__tests__/a.js': `
    tes('bar', () => { expect('bar').toBe('foo'); });
    `,
      '__tests__/b.js': `
    test('foo', () => { expect('foo').toBe('foo'); });
    `,
      'package.json': JSON.stringify({
        jest: {
          testEnvironment: 'node',
        },
      }),
    },
    name: 'failed test compilation from SyntaxError',
  },
];

test.each(failedTestContents)(
  'onlyFailures flag works in non-watch mode due to $name',
  ({content}) => {
    writeFiles(DIR, content);

    let stdout, stderr;

    ({stdout, stderr} = runJest(DIR));
    expect(stdout).toBe('');
    expect(stderr).toMatch('FAIL __tests__/a.js');
    expect(stderr).toMatch('PASS __tests__/b.js');

    // only the failed test should run and it should fail
    ({stdout, stderr} = runJest(DIR, ['--onlyFailures']));
    expect(stdout).toBe('');
    expect(stderr).toMatch('FAIL __tests__/a.js');
    expect(stderr).not.toMatch('__tests__/b.js');

    // fix the failing test
    const data = "test('bar 1', () => { expect('bar').toBe('bar'); })";
    fs.writeFileSync(path.join(DIR, '__tests__/a.js'), data);

    // only the failed test should run and it should pass
    ({stdout, stderr} = runJest(DIR, ['--onlyFailures']));
    expect(stdout).toBe('');
    expect(stderr).toMatch('PASS __tests__/a.js');
    expect(stderr).not.toMatch('__tests__/b.js');

    // No test should run
    ({stdout, stderr} = runJest(DIR, ['--onlyFailures']));
    expect(stdout).toBe('No failed test found.');
    expect(stderr).toBe('');
  },
);