Configure babel cwd to be project rootDir

babel.config.js

@@ -1,7 +1,6 @@
 // Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 
 module.exports = {
-  babelrcRoots: ['examples/*'],
   plugins: [
     ['@babel/plugin-transform-modules-commonjs', {allowTopLevelThis: true}],
     '@babel/plugin-transform-strict-mode',

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

@@ -15,13 +15,19 @@ module.exports = {
       globalSetup: '<rootDir>/setup.js',
       rootDir: path.resolve(__dirname, './project-1'),
       testMatch: ['<rootDir>/**/*.test.js'],
+      transform: {
+        '\\.js$': require.resolve('./transform'),
+      },
       transformIgnorePatterns: ['/node_modules/', '/packages/'],
     },
     {
       displayName: 'project-2',
       globalSetup: '<rootDir>/setup.js',
       rootDir: path.resolve(__dirname, './project-2'),
       testMatch: ['<rootDir>/**/*.test.js'],
+      transform: {
+        '\\.js$': require.resolve('./transform'),
+      },
       transformIgnorePatterns: ['/node_modules/', '/packages/'],
     },
   ],

e2e/global-setup/transform.js

@@ -0,0 +1,8 @@
+// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+const babelJest = require('babel-jest');
+
+/* use higher-level babel.config.js */
+
+module.exports = babelJest.createTransformer({
+  rootMode: 'upward',
+});

e2e/multi-project-babel/bar/.babelrc.js

@@ -1,3 +1,4 @@
+// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 module.exports = {
   presets: ['@babel/preset-flow'],
 };

e2e/multi-project-babel/bar/bar.js

@@ -1 +1,2 @@
+// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 module.exports = (text: string) => text;

e2e/multi-project-babel/foo/.babelrc.js

@@ -1,3 +1,4 @@
+// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 module.exports = {
   presets: ['@babel/preset-flow'],
 };

e2e/multi-project-babel/foo/foo.js

@@ -1 +1,2 @@
+// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 module.exports = (text: string) => text;

packages/babel-jest/src/index.js

@@ -52,7 +52,7 @@ const createTransformer = (options: any): Transformer => {
       configString: string,
       {config, instrument, rootDir}: {config: ProjectConfig} & CacheKeyOptions,
     ): string {
-      const babelOptions = loadBabelConfig(config.cwd, filename);
+      const babelOptions = loadBabelConfig(config.rootDir, filename);
       const configPath = [
         babelOptions.config || '',
         babelOptions.babelrc || '',
@@ -85,7 +85,9 @@ const createTransformer = (options: any): Transformer => {
       config: ProjectConfig,
       transformOptions?: TransformOptions,
     ): string | TransformedSource {
-      const babelOptions = {...loadBabelConfig(config.cwd, filename).options};
+      const babelOptions = {
+        ...loadBabelConfig(config.rootDir, filename).options,
+      };
 
       if (transformOptions && transformOptions.instrument) {
         babelOptions.auxiliaryCommentBefore = ' istanbul ignore next ';

packages/jest-runtime/src/__tests__/test_root/.babelrc.js

@@ -0,0 +1,16 @@
+module.exports = {
+  plugins: [
+    ['@babel/plugin-transform-modules-commonjs', {allowTopLevelThis: true}],
+    '@babel/plugin-transform-strict-mode',
+  ],
+  presets: [
+    [
+      '@babel/preset-env',
+      {
+        shippedProposals: true,
+        targets: {node: 6},
+      },
+    ],
+    '@babel/preset-flow',
+  ],
+};