Add failing e2e test

e2e/__tests__/__snapshots__/watch_mode_no_access.test.js.snap

@@ -0,0 +1,27 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`does not re-run tests when only access time is modified 1`] = `
+Array [
+  "Test Suites: 1 passed, 1 total
+Tests:       1 passed, 1 total
+Snapshots:   0 total
+Time:        <<REPLACED>>
+Ran all test suites.",
+  "Test Suites: 1 passed, 1 total
+Tests:       1 passed, 1 total
+Snapshots:   0 total
+Time:        <<REPLACED>>
+Ran all test suites.",
+  "Test Suites: 1 passed, 1 total
+Tests:       1 passed, 1 total
+Snapshots:   0 total
+Time:        <<REPLACED>>
+Ran all test suites.",
+  "Test Suites: 1 failed, 1 total
+Tests:       1 failed, 1 total
+Snapshots:   0 total
+Time:        <<REPLACED>>
+Ran all test suites.
+",
+]
+`;

e2e/__tests__/watch_mode_no_access.test.js

@@ -0,0 +1,76 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ */
+
+'use strict';
+
+import fs from 'fs';
+import os from 'os';
+import path from 'path';
+import {cleanup, extractSummaries, writeFiles} from '../Utils';
+import {until as runJestUntil} from '../runJest';
+
+const DIR = path.resolve(os.tmpdir(), 'watch_mode_no_access');
+
+const sleep = time => new Promise(resolve => setTimeout(resolve, time));
+
+beforeEach(() => cleanup(DIR));
+afterAll(() => cleanup(DIR));
+
+const setupFiles = () => {
+  writeFiles(DIR, {
+    '__tests__/foo.spec.js': `
+      const foo = require('../foo');
+      test('foo', () => { expect(typeof foo).toBe('number'); });
+    `,
+    'foo.js': `
+      module.exports = 0;
+    `,
+    'package.json': JSON.stringify({
+      jest: {},
+    }),
+  });
+};
+
+test('does not re-run tests when only access time is modified', async () => {
+  setupFiles();
+
+  const testRun = runJestUntil(DIR, ['--watchAll', '--no-watchman'], '1 failed, 1 total');
+
+  await sleep(1000);
+
+  // Should re-run the test
+  const modulePath = path.join(DIR, 'foo.js');
+  const stat = fs.lstatSync(modulePath);
+  fs.utimesSync(modulePath, stat.atime, stat.mtime);
+
+  await sleep(1000);
+
+  // Should not re-run the test
+  const fakeATime = 1541723621;
+  fs.utimesSync(modulePath, fakeATime, stat.mtime);
+
+  await sleep(1000);
+
+  // Should re-run the test
+  fs.writeFileSync(modulePath, 'module.exports = 1;', {encoding: 'utf-8'});
+
+  await sleep(1000);
+
+  // Should make the test fail and finish the process
+  fs.writeFileSync(modulePath, 'module.exports = undefined;', {
+    encoding: 'utf-8',
+  });
+
+  const {stderr} = await testRun;
+  const results = extractSummaries(stderr);
+
+  // initial YES, mtime YES, atime NO, mtime YES, fail YES
+  expect(results).toHaveLength(4);
+  expect(results.map(result => result.summary)).toMatchSnapshot();
+});

e2e/runJest.js

@@ -133,11 +133,11 @@ export const until = async function(
       write(chunk, encoding, callback) {
         const output = chunk.toString('utf8');
 
+        callback();
+
         if (output.includes(text)) {
           jestPromise.kill();
         }
-
-        callback();
       },
     }),
   );