babel-plugin-jest-hoist: Ignore TS type annotations when looking for out-of-scope references

CHANGELOG.md

@@ -113,6 +113,7 @@
 - `[jest-snapshot]` Write and read snapshots from disk even if `fs` is mocked ([#7080](https://github.com/facebook/jest/pull/7080))
 - `[jest-config]` Normalize `config.cwd` and `config.rootDir` using `realpath ([#7598](https://github.com/facebook/jest/pull/7598))
 - `[jest-environment-node]` Fix buffer property is not ArrayBuffer issue. ([#7626](https://github.com/facebook/jest/pull/7626))
+- `[babel-plugin-jest-hoist]` Ignore TS type annotations when looking for out-of-scope references ([#7641](https://github.com/facebook/jest/pull/7641))
 
 ### Chore & Maintenance
 

e2e/__tests__/babelPluginJestHoist.test.js

@@ -21,5 +21,5 @@ beforeEach(() => {
 it('sucessfully runs the tests inside `babel-plugin-jest-hoist/`', () => {
   const {json} = runWithJson(DIR, ['--no-cache', '--coverage']);
   expect(json.success).toBe(true);
-  expect(json.numTotalTestSuites).toBe(2);
+  expect(json.numTotalTestSuites).toBe(3);
 });

e2e/babel-plugin-jest-hoist/__tests__/typescript.test.ts

@@ -0,0 +1,24 @@
+/**
+ * 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.
+ *
+ * @emails oncall+jsinfra
+ */
+
+/* eslint-disable import/no-unresolved */
+
+import {Color} from '../types';
+import {color} from '../entry';
+
+jest.mock('../entry', () => {
+  const color: Color = 'blue';
+  return {color};
+});
+
+describe('babel-plugin-jest-hoist', () => {
+  it('works even with type imports', () => {
+    expect(color).toBe('blue');
+  });
+});

e2e/babel-plugin-jest-hoist/babel.config.js

@@ -1,6 +1,16 @@
 // Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 
 module.exports = {
+  overrides: [
+    {
+      presets: ['@babel/preset-flow'],
+      test: '**/*.js',
+    },
+    {
+      presets: ['@babel/preset-typescript'],
+      test: '**/*.ts',
+    },
+  ],
   plugins: ['jest-hoist'],
-  presets: ['@babel/preset-env', '@babel/preset-flow'],
+  presets: ['@babel/preset-env'],
 };

e2e/babel-plugin-jest-hoist/entry.ts

@@ -0,0 +1,11 @@
+/**
+ * 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.
+ */
+
+// eslint-disable-next-line import/no-unresolved
+import {Color} from './types';
+
+export const color: Color = 'red';

e2e/babel-plugin-jest-hoist/package.json

@@ -1,7 +1,8 @@
 {
   "dependencies": {
-    "@babel/preset-env": "7.0.0",
-    "@babel/preset-flow": "7.0.0",
+    "@babel/preset-env": "^7.0.0",
+    "@babel/preset-flow": "^7.0.0",
+    "@babel/preset-typescript": "^7.0.0",
     "react": "*"
   },
   "jest": {

e2e/babel-plugin-jest-hoist/types.ts

@@ -0,0 +1,8 @@
+/**
+ * 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 type Color = 'red' | 'blue';

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

@@ -76,7 +76,7 @@ const IDVisitor = {
   ReferencedIdentifier(path) {
     this.ids.add(path);
   },
-  blacklist: ['TypeAnnotation'],
+  blacklist: ['TypeAnnotation', 'TSTypeAnnotation'],
 };
 
 const FUNCTIONS: Object = Object.create(null);