Add support for globalSetup and globalTeardown in projects

CHANGELOG.md

@@ -13,6 +13,7 @@
 - `[jest-haste-map]` [**BREAKING**] Remove name from hash in `HasteMap.getCacheFilePath` ([#7218](https://github.com/facebook/jest/pull/7218))
 - `[babel-preset-jest]` [**BREAKING**] Export a function instead of an object for Babel 7 compatibility ([#7203](https://github.com/facebook/jest/pull/7203))
 - `[jest-haste-map]` [**BREAKING**] Expose relative paths when getting the file iterator ([#7321](https://github.com/facebook/jest/pull/7321))
+- `[jest-cli]` Add Support for `globalSetup` and `globalTeardown` in projects ([#6865](https://github.com/facebook/jest/pull/6865))
 - `[jest-runtime]` Add `extraGlobals` to config to load extra global variables into the execution vm ([#7454](https://github.com/facebook/jest/pull/7454))
 - `[jest-util]` Export `specialChars` containing Unicode characters and ANSI escapes for console output ([#7532](https://github.com/facebook/jest/pull/7532))
 - `[jest-config]` Handle typescript (`ts` and `tsx`) by default ([#7533](https://github.com/facebook/jest/pull/7533))

TestUtils.js

@@ -81,6 +81,8 @@ const DEFAULT_PROJECT_CONFIG: ProjectConfig = {
   extraGlobals: [],
   filter: null,
   forceCoverageMatch: [],
+  globalSetup: null,
+  globalTeardown: null,
   globals: {},
   haste: {
     providesModuleNodeModules: [],

docs/Configuration.md

@@ -350,6 +350,8 @@ Default: `undefined`
 
 This option allows the use of a custom global setup module which exports an async function that is triggered once before all test suites. This function gets Jest's `globalConfig` object as a parameter.
 
+_Note: A global setup module configured in a project (using multi-project runner) will be triggered only when you run at least one test from this project._
+
 _Note: Any global variables that are defined through `globalSetup` can only be read in `globalTeardown`. You cannot retrieve globals defined here in your test suites._
 
 Example:
@@ -376,6 +378,8 @@ Default: `undefined`
 
 This option allows the use of a custom global teardown module which exports an async function that is triggered once after all test suites. This function gets Jest's `globalConfig` object as a parameter.
 
+_Note: A global teardown module configured in a project (using multi-project runner) will be triggered only when you run at least one test from this project._
+
 ### `moduleDirectories` [array<string>]
 
 Default: `["node_modules"]`

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

@@ -19,6 +19,8 @@ exports[`--showConfig outputs config info and exits 1`] = `
       \\"errorOnDeprecated\\": false,
       \\"filter\\": null,
       \\"forceCoverageMatch\\": [],
+      \\"globalSetup\\": null,
+      \\"globalTeardown\\": null,
       \\"globals\\": {},
       \\"haste\\": {
         \\"computeSha1\\": false,

e2e/__tests__/global_setup.test.js

@@ -14,13 +14,27 @@ import runJest, {json as runWithJson} from '../runJest';
 import {cleanup} from '../Utils';
 
 const DIR = path.join(os.tmpdir(), 'jest-global-setup');
+const project1DIR = path.join(os.tmpdir(), 'jest-global-setup-project-1');
+const project2DIR = path.join(os.tmpdir(), 'jest-global-setup-project-2');
 
-beforeEach(() => cleanup(DIR));
-afterAll(() => cleanup(DIR));
+beforeEach(() => {
+  cleanup(DIR);
+  cleanup(project1DIR);
+  cleanup(project2DIR);
+});
+afterAll(() => {
+  cleanup(DIR);
+  cleanup(project1DIR);
+  cleanup(project2DIR);
+});
 
 test('globalSetup is triggered once before all test suites', () => {
   const setupPath = path.resolve(__dirname, '../global-setup/setup.js');
-  const result = runWithJson('global-setup', [`--globalSetup=${setupPath}`]);
+  const result = runWithJson('global-setup', [
+    `--globalSetup=${setupPath}`,
+    `--testPathPattern=__tests__`,
+  ]);
+
   expect(result.status).toBe(0);
   const files = fs.readdirSync(DIR);
   expect(files).toHaveLength(1);
@@ -32,6 +46,7 @@ test('jest throws an error when globalSetup does not export a function', () => {
   const setupPath = path.resolve(__dirname, '../global-setup/invalid_setup.js');
   const {status, stderr} = runJest('global-setup', [
     `--globalSetup=${setupPath}`,
+    `--testPathPattern=__tests__`,
   ]);
 
   expect(status).toBe(1);
@@ -55,3 +70,36 @@ test('globalSetup function gets jest config object as a parameter', () => {
 
   expect(result.stdout).toBe(testPathPattern);
 });
+
+test('should call globalSetup function of multiple projects', () => {
+  const configPath = path.resolve(
+    __dirname,
+    '../global-setup/projects.jest.config.js',
+  );
+
+  const result = runWithJson('global-setup', [`--config=${configPath}`]);
+
+  expect(result.status).toBe(0);
+
+  expect(fs.existsSync(DIR)).toBe(true);
+  expect(fs.existsSync(project1DIR)).toBe(true);
+  expect(fs.existsSync(project2DIR)).toBe(true);
+});
+
+test('should not call a globalSetup of a project if there are no tests to run from this project', () => {
+  const configPath = path.resolve(
+    __dirname,
+    '../global-setup/projects.jest.config.js',
+  );
+
+  const result = runWithJson('global-setup', [
+    `--config=${configPath}`,
+    '--testPathPattern=project-1',
+  ]);
+
+  expect(result.status).toBe(0);
+
+  expect(fs.existsSync(DIR)).toBe(true);
+  expect(fs.existsSync(project1DIR)).toBe(true);
+  expect(fs.existsSync(project2DIR)).toBe(false);
+});

e2e/__tests__/global_teardown.test.js

@@ -15,9 +15,19 @@ import runJest, {json as runWithJson} from '../runJest';
 import {cleanup} from '../Utils';
 
 const DIR = path.join(os.tmpdir(), 'jest-global-teardown');
+const project1DIR = path.join(os.tmpdir(), 'jest-global-teardown-project-1');
+const project2DIR = path.join(os.tmpdir(), 'jest-global-teardown-project-2');
 
-beforeEach(() => cleanup(DIR));
-afterAll(() => cleanup(DIR));
+beforeEach(() => {
+  cleanup(DIR);
+  cleanup(project1DIR);
+  cleanup(project2DIR);
+});
+afterAll(() => {
+  cleanup(DIR);
+  cleanup(project1DIR);
+  cleanup(project2DIR);
+});
 
 test('globalTeardown is triggered once after all test suites', () => {
   mkdirp.sync(DIR);
@@ -27,7 +37,9 @@ test('globalTeardown is triggered once after all test suites', () => {
   );
   const result = runWithJson('global-teardown', [
     `--globalTeardown=${teardownPath}`,
+    `--testPathPattern=__tests__`,
   ]);
+
   expect(result.status).toBe(0);
   const files = fs.readdirSync(DIR);
   expect(files).toHaveLength(1);
@@ -42,6 +54,7 @@ test('jest throws an error when globalTeardown does not export a function', () =
   );
   const {status, stderr} = runJest('global-teardown', [
     `--globalTeardown=${teardownPath}`,
+    `--testPathPattern=__tests__`,
   ]);
 
   expect(status).toBe(1);
@@ -65,3 +78,36 @@ test('globalTeardown function gets jest config object as a parameter', () => {
 
   expect(result.stdout).toBe(testPathPattern);
 });
+
+test('should call globalTeardown function of multiple projects', () => {
+  const configPath = path.resolve(
+    __dirname,
+    '../global-teardown/projects.jest.config.js',
+  );
+
+  const result = runWithJson('global-teardown', [`--config=${configPath}`]);
+
+  expect(result.status).toBe(0);
+
+  expect(fs.existsSync(DIR)).toBe(true);
+  expect(fs.existsSync(project1DIR)).toBe(true);
+  expect(fs.existsSync(project2DIR)).toBe(true);
+});
+
+test('should not call a globalTeardown of a project if there are no tests to run from this project', () => {
+  const configPath = path.resolve(
+    __dirname,
+    '../global-teardown/projects.jest.config.js',
+  );
+
+  const result = runWithJson('global-teardown', [
+    `--config=${configPath}`,
+    '--testPathPattern=project-1',
+  ]);
+
+  expect(result.status).toBe(0);
+
+  expect(fs.existsSync(DIR)).toBe(true);
+  expect(fs.existsSync(project1DIR)).toBe(true);
+  expect(fs.existsSync(project2DIR)).toBe(false);
+});

e2e/global-setup/project-1/setup.js

@@ -0,0 +1,22 @@
+/**
+ * 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.
+ */
+const crypto = require('crypto');
+const fs = require('fs');
+const mkdirp = require('mkdirp');
+const os = require('os');
+const path = require('path');
+
+const DIR = path.join(os.tmpdir(), 'jest-global-setup-project-1');
+
+module.exports = function() {
+  return new Promise((resolve, reject) => {
+    mkdirp.sync(DIR);
+    const fileId = crypto.randomBytes(20).toString('hex');
+    fs.writeFileSync(path.join(DIR, fileId), 'setup');
+    resolve();
+  });
+};

e2e/global-setup/project-1/setup.test.js

@@ -0,0 +1,20 @@
+/**
+ * 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.
+ */
+'use strict';
+
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+
+const DIR = path.join(os.tmpdir(), 'jest-global-setup-project-1');
+
+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/project-2/setup.js

@@ -0,0 +1,22 @@
+/**
+ * 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.
+ */
+const crypto = require('crypto');
+const fs = require('fs');
+const mkdirp = require('mkdirp');
+const os = require('os');
+const path = require('path');
+
+const DIR = path.join(os.tmpdir(), 'jest-global-setup-project-2');
+
+module.exports = function() {
+  return new Promise((resolve, reject) => {
+    mkdirp.sync(DIR);
+    const fileId = crypto.randomBytes(20).toString('hex');
+    fs.writeFileSync(path.join(DIR, fileId), 'setup');
+    resolve();
+  });
+};

e2e/global-setup/project-2/setup.test.js

@@ -0,0 +1,20 @@
+/**
+ * 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.
+ */
+'use strict';
+
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+
+const DIR = path.join(os.tmpdir(), 'jest-global-setup-project-2');
+
+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/projects.jest.config.js

@@ -0,0 +1,26 @@
+/**
+ * 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.
+ */
+
+const path = require('path');
+
+module.exports = {
+  globalSetup: '<rootDir>/setup.js',
+  projects: [
+    {
+      displayName: 'project-1',
+      globalSetup: '<rootDir>/setup.js',
+      rootDir: path.resolve(__dirname, './project-1'),
+      testMatch: ['<rootDir>/**/*.test.js'],
+    },
+    {
+      displayName: 'project-2',
+      globalSetup: '<rootDir>/setup.js',
+      rootDir: path.resolve(__dirname, './project-2'),
+      testMatch: ['<rootDir>/**/*.test.js'],
+    },
+  ],
+};

e2e/global-teardown/project-1/teardown.js

@@ -0,0 +1,22 @@
+/**
+ * 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.
+ */
+const crypto = require('crypto');
+const fs = require('fs');
+const mkdirp = require('mkdirp');
+const os = require('os');
+const path = require('path');
+
+const DIR = path.join(os.tmpdir(), 'jest-global-teardown-project-1');
+
+module.exports = function() {
+  return new Promise((resolve, reject) => {
+    mkdirp.sync(DIR);
+    const fileId = crypto.randomBytes(20).toString('hex');
+    fs.writeFileSync(path.join(DIR, fileId), 'teardown');
+    resolve();
+  });
+};

e2e/global-teardown/project-1/teardown.test.js

@@ -0,0 +1,17 @@
+/**
+ * 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.
+ */
+'use strict';
+
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+
+const DIR = path.join(os.tmpdir(), 'jest-global-teardown-project-1');
+
+test('should not exist teardown file', () => {
+  expect(fs.existsSync(DIR)).toBe(false);
+});

e2e/global-teardown/project-2/teardown.js

@@ -0,0 +1,22 @@
+/**
+ * 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.
+ */
+const crypto = require('crypto');
+const fs = require('fs');
+const mkdirp = require('mkdirp');
+const os = require('os');
+const path = require('path');
+
+const DIR = path.join(os.tmpdir(), 'jest-global-teardown-project-2');
+
+module.exports = function() {
+  return new Promise((resolve, reject) => {
+    mkdirp.sync(DIR);
+    const fileId = crypto.randomBytes(20).toString('hex');
+    fs.writeFileSync(path.join(DIR, fileId), 'teardown');
+    resolve();
+  });
+};

e2e/global-teardown/project-2/teardown.test.js

@@ -0,0 +1,17 @@
+/**
+ * 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.
+ */
+'use strict';
+
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+
+const DIR = path.join(os.tmpdir(), 'jest-global-teardown-project-2');
+
+test('teardown file should not exist', () => {
+  expect(fs.existsSync(DIR)).toBe(false);
+});