From f7e943164bee636616b04bc5cdeefddd9ce57d13 Mon Sep 17 00:00:00 2001
From: Constantine Genchevsky <const.gen@gmail.com>
Date: Thu, 21 May 2020 19:06:32 +0300
Subject: [PATCH 1/3] Fix configuration of Webpack aliases

---
 packages/jest/src/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/jest/src/index.js b/packages/jest/src/index.js
index 01567e9a9..f7c9c8692 100644
--- a/packages/jest/src/index.js
+++ b/packages/jest/src/index.js
@@ -63,7 +63,7 @@ module.exports = (options = {}) => (neutrino) => {
         moduleNameMapper: Object.keys(aliases).reduce(
           (mapper, key) => ({
             ...mapper,
-            [`^${key}$`]: `${getFinalPath(aliases[key])}$1`,
+            [`^${key}$`]: `${getFinalPath(aliases[key])}`,
           }),
           {
             [extensionsToNames(media)]: require.resolve('./file-mock'),

From 11282148c10c2bdc705c0231c9f77be34a676564 Mon Sep 17 00:00:00 2001
From: constgen <const.gen@gmail.com>
Date: Mon, 22 Jun 2020 17:35:17 +0300
Subject: [PATCH 2/3] Add a test for the reflection of Webpack aliases in Jest
 config

---
 packages/jest/test/jest_test.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/packages/jest/test/jest_test.js b/packages/jest/test/jest_test.js
index c96a805d6..655aa9af6 100644
--- a/packages/jest/test/jest_test.js
+++ b/packages/jest/test/jest_test.js
@@ -1,3 +1,4 @@
+import path from 'path';
 import test from 'ava';
 import airbnbPreset from '../../airbnb';
 import eslintPreset from '../../eslint';
@@ -150,3 +151,18 @@ test('exposes babel config without babel-loader specific options', (t) => {
   t.false('cacheIdentifier' in babelOptions);
   t.false('customize' in babelOptions);
 });
+
+test('configures webpack aliases in moduleNameMapper correctly', (t) => {
+  const api = new Neutrino();
+  const reactPath = path.resolve(path.join('node_modules', 'react'));
+  api.use(reactPreset());
+  api.use(mw());
+  api.config.resolve.alias.set('react', reactPath);
+  const config = api.outputHandlers.get('jest')(api);
+
+  t.true(
+    Object.entries(config.moduleNameMapper).some(function ([key, alias]) {
+      return key === '^react$' && alias === reactPath;
+    }),
+  );
+});

From 7e115799a45fa45599ec3157a92f9f5cf5d60c71 Mon Sep 17 00:00:00 2001
From: constgen <const.gen@gmail.com>
Date: Mon, 22 Jun 2020 17:56:40 +0300
Subject: [PATCH 3/3] Fix linting violation

---
 packages/jest/test/jest_test.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/jest/test/jest_test.js b/packages/jest/test/jest_test.js
index 655aa9af6..113e5fecf 100644
--- a/packages/jest/test/jest_test.js
+++ b/packages/jest/test/jest_test.js
@@ -161,7 +161,7 @@ test('configures webpack aliases in moduleNameMapper correctly', (t) => {
   const config = api.outputHandlers.get('jest')(api);
 
   t.true(
-    Object.entries(config.moduleNameMapper).some(function ([key, alias]) {
+    Object.entries(config.moduleNameMapper).some(([key, alias]) => {
       return key === '^react$' && alias === reactPath;
     }),
   );