Fixed the bug where mocking a file with the filename resolved as back…

…ticks would fail (#5426)

* Fixed the bug where mocking a file with the filename resolved as backticks would fail

* Updated changelog

* Added license info

* Fixed the unit test related to the backticks issue and updated the changelog with the PR link

* Update CHANGELOG.md

* Update CHANGELOG.md

CHANGELOG.md

@@ -7,6 +7,8 @@
 
 ### Fixes
 
+* `[jest-mock]` Add backticks support (\`\`) to `mock` a certain package via the
+  `__mocks__` folder. ([#5426](https://github.com/facebook/jest/pull/5426))
 * `[jest-message-util]` Prevent an `ENOENT` crash when the test file contained a
   malformed source-map. ([#5405](https://github.com/facebook/jest/pull/5405)).
 * `[jest]` Add `import-local` to `jest` package.

integration-tests/babel-plugin-jest-hoist/__test_modules__/__mocks__/jest-backticks.js

@@ -0,0 +1,10 @@
+/**
+ * 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.
+ */
+
+module.exports = {
+  name: 'backticks-with-jest',
+};

integration-tests/babel-plugin-jest-hoist/__test_modules__/jest-backticks.js

@@ -0,0 +1,8 @@
+/**
+ * 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.
+ */
+
+export default () => 'unmocked';

integration-tests/babel-plugin-jest-hoist/__tests__/integration.test.js

@@ -19,6 +19,7 @@ import b from '../__test_modules__/b';
 import c from '../__test_modules__/c';
 import d from '../__test_modules__/d';
 import e from '../__test_modules__/e';
+import jestBackticks from '../__test_modules__/jest-backticks';
 
 // The virtual mock call below will be hoisted above this `require` call.
 const virtualModule = require('virtual-module');
@@ -44,6 +45,7 @@ jest.mock('../__test_modules__/e', () => {
     },
   };
 });
+jest.mock(`../__test_modules__/jest-backticks`);
 jest.mock('virtual-module', () => 'kiwi', {virtual: true});
 // This has types that should be ignored by the out-of-scope variables check.
 jest.mock('has-flow-types', () => (props: {children: mixed}) => 3, {
@@ -125,4 +127,8 @@ describe('babel-plugin-jest-hoist', () => {
   it('works with virtual modules', () => {
     expect(virtualModule).toBe('kiwi');
   });
+
+  it('works if the file name is mocked via backticks and defined in the "__mocks__" directory', () => {
+    expect(jestBackticks.name).toBe('backticks-with-jest');
+  });
 });

packages/babel-plugin-jest-hoist/src/index.js

@@ -78,7 +78,7 @@ const IDVisitor = {
 const FUNCTIONS: Object = Object.create(null);
 FUNCTIONS.mock = args => {
   if (args.length === 1) {
-    return args[0].isStringLiteral();
+    return args[0].isStringLiteral() || args[0].isLiteral();
   } else if (args.length === 2 || args.length === 3) {
     const moduleFactory = args[1];
     invariant(