globalSetup and globalTeardown use default export with es modules

e2e/__tests__/globalSetup.test.js

@@ -122,3 +122,36 @@ test('should not call any globalSetup if there are no tests to run', () => {
   expect(fs.existsSync(project1DIR)).toBe(false);
   expect(fs.existsSync(project2DIR)).toBe(false);
 });
+
+test('globalSetup works with default export', () => {
+  const setupPath = path.resolve(
+    __dirname,
+    '../global-setup/setupWithDefaultExport.js',
+  );
+
+  const testPathPattern = 'pass';
+
+  const result = runJest('global-setup', [
+    `--globalSetup=${setupPath}`,
+    `--testPathPattern=${testPathPattern}`,
+  ]);
+
+  expect(result.stdout).toBe(testPathPattern);
+});
+
+test('globalSetup throws with named export', () => {
+  const setupPath = path.resolve(
+    __dirname,
+    '../global-setup/invalidSetupWithNamedExport.js',
+  );
+
+  const {status, stderr} = runJest('global-setup', [
+    `--globalSetup=${setupPath}`,
+    `--testPathPattern=__tests__`,
+  ]);
+
+  expect(status).toBe(1);
+  expect(stderr).toMatch(
+    `TypeError: globalSetup file must use a default export with ES Modules at ${setupPath}`,
+  );
+});

e2e/__tests__/globalTeardown.test.js

@@ -111,3 +111,36 @@ test('should not call a globalTeardown of a project if there are no tests to run
   expect(fs.existsSync(project1DIR)).toBe(true);
   expect(fs.existsSync(project2DIR)).toBe(false);
 });
+
+test('globalTeardown works with default export', () => {
+  const teardownPath = path.resolve(
+    __dirname,
+    '../global-teardown/teardownWithDefaultExport.js',
+  );
+
+  const testPathPattern = 'pass';
+
+  const result = runJest('global-teardown', [
+    `--globalTeardown=${teardownPath}`,
+    `--testPathPattern=${testPathPattern}`,
+  ]);
+
+  expect(result.stdout).toBe(testPathPattern);
+});
+
+test('globalTeardown throws with named export', () => {
+  const teardownPath = path.resolve(
+    __dirname,
+    '../global-teardown/invalidTeardownWithNamedExport.js',
+  );
+
+  const {status, stderr} = runJest('global-teardown', [
+    `--globalTeardown=${teardownPath}`,
+    `--testPathPattern=__tests__`,
+  ]);
+
+  expect(status).toBe(1);
+  expect(stderr).toMatch(
+    `TypeError: globalTeardown file must use a default export with ES Modules at ${teardownPath}`,
+  );
+});

e2e/global-setup/babel.config.js

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

e2e/global-setup/invalidSetupWithNamedExport.js

@@ -0,0 +1,12 @@
+/**
+ * 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.
+ */
+
+function invalidSetupWithNamedExport(jestConfig): void {
+  console.log(jestConfig.testPathPattern);
+}
+
+export {invalidSetupWithNamedExport};

e2e/global-setup/setupWithDefaultExport.js

@@ -0,0 +1,10 @@
+/**
+ * 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 function(jestConfig): void {
+  console.log(jestConfig.testPathPattern);
+}

e2e/global-teardown/babel.config.js

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

e2e/global-teardown/invalidTeardownWithNamedExport.js

@@ -0,0 +1,12 @@
+/**
+ * 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.
+ */
+
+function invalidTeardownWithNamedExport(jestConfig): void {
+  console.log(jestConfig.testPathPattern);
+}
+
+export {invalidTeardownWithNamedExport};

e2e/global-teardown/teardownWithDefaultExport.js

@@ -0,0 +1,10 @@
+/**
+ * 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 function(jestConfig): void {
+  console.log(jestConfig.testPathPattern);
+}

packages/jest-cli/src/runGlobalHook.js

@@ -59,7 +59,20 @@ export default ({
       );
 
       // $FlowFixMe
-      const globalModule = require(modulePath);
+      let globalModule = require(modulePath);
+
+      if (
+        typeof globalModule === 'object' &&
+        globalModule.__esModule === true
+      ) {
+        if (globalModule.default) {
+          globalModule = globalModule.default;
+        } else {
+          throw new TypeError(
+            `${moduleName} file must use a default export with ES Modules at ${modulePath}`,
+          );
+        }
+      }
 
       if (typeof globalModule !== 'function') {
         throw new TypeError(