feat(jest-core): add support for globalSetup and globalTeardown written in ESM (#11267)

Author: aledalgrande

CHANGELOG.md

@@ -16,6 +16,7 @@
 - `[jest-core]` Run failed tests interactively the same way we do with snapshots ([#10858](https://github.com/facebook/jest/pull/10858))
 - `[jest-core]` more `TestSequencer` methods can be async ([#10980](https://github.com/facebook/jest/pull/10980))
 - `[jest-core]` Add support for `testSequencer` written in ESM ([#11207](https://github.com/facebook/jest/pull/11207))
+- `[jest-core]` Add support for `globalSetup` and `globalTeardown` written in ESM ([#11267](https://github.com/facebook/jest/pull/11267))
 - `[jest-environment-node]` Add AbortController to globals ([#11182](https://github.com/facebook/jest/pull/11182))
 - `[@jest/fake-timers]` Update to `@sinonjs/fake-timers` to v7 ([#11198](https://github.com/facebook/jest/pull/11198))
 - `[jest-haste-map]` Handle injected scm clocks ([#10966](https://github.com/facebook/jest/pull/10966))

e2e/__tests__/globalSetup.test.ts

@@ -8,6 +8,7 @@
 import {tmpdir} from 'os';
 import * as path from 'path';
 import * as fs from 'graceful-fs';
+import {onNodeVersions} from '@jest/test-utils';
 import {
   cleanup,
   createEmptyPackage,
@@ -192,3 +193,13 @@ test('properly handle rejections', () => {
   expect(stderr).toContain('Error: Jest: Got error running globalSetup');
   expect(stderr).toContain('reason: undefined');
 });
+
+onNodeVersions('^12.17.0 || >=13.2.0', () => {
+  test('globalSetup works with ESM modules', () => {
+    const {exitCode} = runJest('global-setup-esm', [`--no-cache`], {
+      nodeOptions: '--experimental-vm-modules --no-warnings',
+    });
+
+    expect(exitCode).toBe(0);
+  });
+});

e2e/__tests__/globalTeardown.test.ts

@@ -8,6 +8,7 @@
 import {tmpdir} from 'os';
 import * as path from 'path';
 import * as fs from 'graceful-fs';
+import {onNodeVersions} from '@jest/test-utils';
 import {createDirectory} from 'jest-util';
 import {cleanup, runYarnInstall} from '../Utils';
 import runJest, {json as runWithJson} from '../runJest';
@@ -131,3 +132,13 @@ test('globalTeardown throws with named export', () => {
     `globalTeardown file must export a function at ${teardownPath}`,
   );
 });
+
+onNodeVersions('^12.17.0 || >=13.2.0', () => {
+  test('globalTeardown works with ESM modules', () => {
+    const {exitCode} = runJest('global-teardown-esm', [`--no-cache`], {
+      nodeOptions: '--experimental-vm-modules --no-warnings',
+    });
+
+    expect(exitCode).toBe(0);
+  });
+});

e2e/global-setup-esm/__tests__/test.js

@@ -0,0 +1,20 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. 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.
+ */
+
+import os from 'os';
+import path from 'path';
+import fs from 'graceful-fs';
+import greeting from '../';
+
+const DIR = path.join(os.tmpdir(), 'jest-global-setup-esm');
+
+test('should exist setup file', () => {
+  const files = fs.readdirSync(DIR);
+  expect(files).toHaveLength(1);
+  const setup = fs.readFileSync(path.join(DIR, files[0]), 'utf8');
+  expect(setup).toBe('setup');
+});

e2e/global-setup-esm/index.js

@@ -0,0 +1,8 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. 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.
+ */
+
+export default 'hello!';

e2e/global-setup-esm/package.json

@@ -0,0 +1,8 @@
+{
+  "type": "module",
+  "jest": {
+    "testEnvironment": "node",
+    "globalSetup": "<rootDir>/setup.js",
+    "transform": {}
+  }
+}

e2e/global-setup-esm/setup.js

@@ -0,0 +1,24 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. 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.
+ */
+import crypto from 'crypto';
+import os from 'os';
+import path from 'path';
+import fs from 'graceful-fs';
+import jestUtil from 'jest-util';
+
+const {createDirectory} = jestUtil;
+
+const DIR = path.join(os.tmpdir(), 'jest-global-setup-esm');
+
+export default function () {
+  return new Promise(resolve => {
+    createDirectory(DIR);
+    const fileId = crypto.randomBytes(20).toString('hex');
+    fs.writeFileSync(path.join(DIR, fileId), 'setup');
+    resolve();
+  });
+}

e2e/global-teardown-esm/__tests__/test.js

@@ -0,0 +1,17 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. 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.
+ */
+
+import os from 'os';
+import path from 'path';
+import fs from 'graceful-fs';
+import greeting from '../';
+
+const DIR = path.join(os.tmpdir(), 'jest-global-teardown-esm');
+
+test('should not exist teardown file', () => {
+  expect(fs.existsSync(DIR)).toBe(false);
+});

e2e/global-teardown-esm/index.js

@@ -0,0 +1,8 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. 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.
+ */
+
+export default 'hello!';

e2e/global-teardown-esm/package.json

@@ -0,0 +1,8 @@
+{
+  "type": "module",
+  "jest": {
+    "testEnvironment": "node",
+    "globalTeardown": "<rootDir>/teardown.js",
+    "transform": {}
+  }
+}