Run code transforms over global{Setup,Teardown}

CHANGELOG.md

@@ -14,6 +14,7 @@
 - `[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]` [**BREAKING**] Run code transforms over `global{Setup,Teardown}` ([#7562](https://github.com/facebook/jest/pull/7562))
 - `[jest-haste-map]` Add `hasteFS.getSize(path)` ([#7580](https://github.com/facebook/jest/pull/7580))
 - `[jest-cli]` Print version ending in `-dev` when running a local Jest clone ([#7582](https://github.com/facebook/jest/pull/7582))
 - `[jest-cli]` Add Support for `globalSetup` and `globalTeardown` in projects ([#6865](https://github.com/facebook/jest/pull/6865))

e2e/custom-resolver/package.json

@@ -2,6 +2,10 @@
   "name": "custom-resolver",
   "jest": {
     "globalSetup": "foo",
-    "resolver": "./resolver.js"
+    "resolver": "./resolver.js",
+    "transformIgnorePatterns": [
+      "/node_modules/",
+      "/packages/"
+    ]
   }
 }

e2e/global-setup/babel.config.js

@@ -0,0 +1,5 @@
+// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+
+module.exports = {
+  presets: ['@babel/preset-flow'],
+};

e2e/global-setup/package.json

@@ -1,5 +1,9 @@
 {
   "jest": {
-    "testEnvironment": "node"
+    "testEnvironment": "node",
+    "transformIgnorePatterns": [
+      "/node_modules/",
+      "/packages/"
+    ]
   }
 }

e2e/global-setup/projects.jest.config.js

@@ -15,12 +15,14 @@ module.exports = {
       globalSetup: '<rootDir>/setup.js',
       rootDir: path.resolve(__dirname, './project-1'),
       testMatch: ['<rootDir>/**/*.test.js'],
+      transformIgnorePatterns: ['/node_modules/', '/packages/'],
     },
     {
       displayName: 'project-2',
       globalSetup: '<rootDir>/setup.js',
       rootDir: path.resolve(__dirname, './project-2'),
       testMatch: ['<rootDir>/**/*.test.js'],
+      transformIgnorePatterns: ['/node_modules/', '/packages/'],
     },
   ],
 };

e2e/global-setup/setup.js

@@ -13,7 +13,8 @@ const path = require('path');
 const DIR = path.join(os.tmpdir(), 'jest-global-setup');
 
 module.exports = function() {
-  return new Promise((resolve, reject) => {
+  // This uses a flow annotation to show it can be transpiled
+  return new Promise((resolve, reject: any) => {
     createDirectory(DIR);
     const fileId = crypto.randomBytes(20).toString('hex');
     fs.writeFileSync(path.join(DIR, fileId), 'setup');

e2e/global-teardown/package.json

@@ -1,5 +1,9 @@
 {
   "jest": {
-    "testEnvironment": "node"
+    "testEnvironment": "node",
+    "transformIgnorePatterns": [
+      "/node_modules/",
+      "/packages/"
+    ]
   }
 }

e2e/global-teardown/projects.jest.config.js

@@ -15,12 +15,14 @@ module.exports = {
       globalTeardown: '<rootDir>/teardown.js',
       rootDir: path.resolve(__dirname, './project-1'),
       testMatch: ['<rootDir>/**/*.test.js'],
+      transformIgnorePatterns: ['/node_modules/', '/packages/'],
     },
     {
       displayName: 'project-2',
       globalTeardown: '<rootDir>/teardown.js',
       rootDir: path.resolve(__dirname, './project-2'),
       testMatch: ['<rootDir>/**/*.test.js'],
+      transformIgnorePatterns: ['/node_modules/', '/packages/'],
     },
   ],
 };

packages/jest-cli/package.json

@@ -32,6 +32,8 @@
     "jest-worker": "^23.2.0",
     "micromatch": "^2.3.11",
     "node-notifier": "^5.2.1",
+    "p-each-series": "^1.0.0",
+    "pirates": "^4.0.0",
     "prompts": "^2.0.1",
     "realpath-native": "^1.0.0",
     "rimraf": "^2.5.4",

packages/jest-cli/src/runGlobalHook.js

@@ -6,9 +6,15 @@
  *
  * @flow
  */
+
 import type {GlobalConfig} from 'types/Config';
 import type {Test} from 'types/TestRunner';
 
+import {extname} from 'path';
+import pEachSeries from 'p-each-series';
+import {addHook} from 'pirates';
+import Runtime from 'jest-runtime';
+
 export default ({
   allTests,
   globalConfig,
@@ -17,7 +23,7 @@ export default ({
   allTests: Array<Test>,
   globalConfig: GlobalConfig,
   moduleName: 'globalSetup' | 'globalTeardown',
-}): Promise<?(any[])> => {
+}): Promise<void> => {
   const globalModulePaths = new Set(
     allTests.map(test => test.context.config[moduleName]),
   );
@@ -27,24 +33,44 @@ export default ({
   }
 
   if (globalModulePaths.size > 0) {
-    return Promise.all(
-      Array.from(globalModulePaths).map(async modulePath => {
-        if (!modulePath) {
-          return null;
-        }
-
-        // $FlowFixMe
-        const globalModule = require(modulePath);
-
-        if (typeof globalModule !== 'function') {
-          throw new TypeError(
-            `${moduleName} file must export a function at ${modulePath}`,
-          );
-        }
-
-        return globalModule(globalConfig);
-      }),
-    );
+    return pEachSeries(Array.from(globalModulePaths), async modulePath => {
+      if (!modulePath) {
+        return;
+      }
+
+      const correctConfig = allTests.find(
+        t => t.context.config[moduleName] === modulePath,
+      );
+
+      const projectConfig = correctConfig
+        ? correctConfig.context.config
+        : // Fallback to first config
+          allTests[0].context.config;
+
+      const transformer = new Runtime.ScriptTransformer(projectConfig);
+
+      const revertHook = addHook(
+        (code, filename) =>
+          transformer.transformSource(filename, code, false).code || code,
+        {
+          exts: [extname(modulePath)],
+          matcher: transformer._shouldTransform.bind(transformer),
+        },
+      );
+
+      // $FlowFixMe
+      const globalModule = require(modulePath);
+
+      if (typeof globalModule !== 'function') {
+        throw new TypeError(
+          `${moduleName} file must export a function at ${modulePath}`,
+        );
+      }
+
+      await globalModule(globalConfig);
+
+      revertHook();
+    });
   }
 
   return Promise.resolve();

yarn.lock

@@ -9557,6 +9557,13 @@ p-defer@^1.0.0:
   resolved "https://registry.yarnpkg.com/p-defer/-/p-defer-1.0.0.tgz#9f6eb182f6c9aa8cd743004a7d4f96b196b0fb0c"
   integrity sha1-n26xgvbJqozXQwBKfU+WsZaw+ww=
 
+p-each-series@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/p-each-series/-/p-each-series-1.0.0.tgz#930f3d12dd1f50e7434457a22cd6f04ac6ad7f71"
+  integrity sha1-kw89Et0fUOdDRFeiLNbwSsatf3E=
+  dependencies:
+    p-reduce "^1.0.0"
+
 p-finally@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"