export functions compatible with import jest from 'jest' (#8081)

Author: SimenB

CHANGELOG.md

@@ -4,6 +4,8 @@
 
 ### Fixes
 
+- `[jest-cli]` export functions compatible with `import {default}` ([#8080](https://github.com/facebook/jest/pull/8080))
+
 ### Chore & Maintenance
 
 - `[pretty-format]`: Use `react-is` instead of manual `$$typeof` checks ([#8060](https://github.com/facebook/jest/pull/8060))

e2e/__tests__/runProgrammatically.test.ts

@@ -11,7 +11,12 @@ import {run} from '../Utils';
 
 const dir = resolve(__dirname, '..', 'run-programmatically');
 
-test('run Jest programatically', () => {
+test('run Jest programmatically cjs', () => {
+  const {stdout} = run(`node cjs.js --version`, dir);
+  expect(stdout).toMatch(/\d{2}\.\d{1,2}\.\d{1,2}[\-\S]*-dev$/);
+});
+
+test('run Jest programmatically esm', () => {
   const {stdout} = run(`node index.js --version`, dir);
   expect(stdout).toMatch(/\d{2}\.\d{1,2}\.\d{1,2}[\-\S]*-dev$/);
 });

e2e/run-programmatically/babel.config.js

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

e2e/run-programmatically/cjs.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.
+ *
+ * @flow
+ */
+
+// Running Jest like this is not officially supported,
+// but it is common practice until there is a proper API as a substitute.
+require('jest').run(process.argv);

e2e/run-programmatically/esm.js

@@ -0,0 +1,14 @@
+/**
+ * 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.
+ *
+ * @flow
+ */
+
+import myJestImport from 'jest';
+
+// Running Jest like this is not officially supported,
+// but it is common practice until there is a proper API as a substitute.
+myJestImport.run(process.argv);

e2e/run-programmatically/index.js

@@ -8,6 +8,6 @@
  * @flow
  */
 
-// Running Jest like this is not officially supported,
-// but it is common practice until there is a proper API as a substitute.
-require('jest').run(process.argv);
+require('@babel/register');
+
+require('./esm');

packages/jest-cli/src/index.ts

@@ -5,7 +5,16 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-// TODO: remove exports for the next major
-export {runCLI, SearchSource, TestScheduler, TestWatcher} from '@jest/core';
-export {run} from './cli';
-export {default as getVersion} from './version';
+// TODO: remove @jest/core exports for the next major
+import {runCLI, SearchSource, TestScheduler, TestWatcher} from '@jest/core';
+import {run} from './cli';
+import {default as getVersion} from './version';
+
+export = {
+  SearchSource,
+  TestScheduler,
+  TestWatcher,
+  getVersion,
+  run,
+  runCLI,
+};