Add Jest. (#250)

scripts/eject.js

@@ -7,11 +7,12 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
+var createJestConfig = require('./utils/create-jest-config');
 var fs = require('fs');
 var path = require('path');
+var prompt = require('./utils/prompt');
 var rimrafSync = require('rimraf').sync;
 var spawnSync = require('cross-spawn').sync;
-var prompt = require('./utils/prompt');
 
 prompt(
   'Are you sure you want to eject? This action is permanent.',
@@ -37,6 +38,9 @@ prompt(
     path.join('config', 'polyfills.js'),
     path.join('config', 'webpack.config.dev.js'),
     path.join('config', 'webpack.config.prod.js'),
+    path.join('config', 'jest', 'CSSStub.js'),
+    path.join('config', 'jest', 'FileStub.js'),
+    path.join('config', 'jest', 'transform.js'),
     path.join('scripts', 'build.js'),
     path.join('scripts', 'start.js'),
     path.join('scripts', 'utils', 'chrome.applescript'),
@@ -59,6 +63,7 @@ prompt(
   // Copy the files over
   fs.mkdirSync(path.join(appPath, 'config'));
   fs.mkdirSync(path.join(appPath, 'config', 'flow'));
+  fs.mkdirSync(path.join(appPath, 'config', 'jest'));
   fs.mkdirSync(path.join(appPath, 'scripts'));
   fs.mkdirSync(path.join(appPath, 'scripts', 'utils'));
 
@@ -96,6 +101,11 @@ prompt(
   });
   delete appPackage.scripts['eject'];
 
+  appPackage.scripts.test = 'jest';
+  appPackage.jest = createJestConfig(
+    filePath => path.join('<rootDir>', filePath)
+  );
+
   // explicitly specify ESLint config path for editor plugins
   appPackage.eslintConfig = {
     extends: './config/eslint.js',

scripts/init.js

@@ -19,13 +19,17 @@ module.exports = function(appPath, appName, verbose, originalDirectory) {
 
   // Copy over some of the devDependencies
   appPackage.dependencies = appPackage.dependencies || {};
+  appPackage.devDependencies = appPackage.devDependencies || {};
   ['react', 'react-dom'].forEach(function (key) {
     appPackage.dependencies[key] = ownPackage.devDependencies[key];
   });
+  ['react-test-renderer'].forEach(function (key) {
+    appPackage.devDependencies[key] = ownPackage.devDependencies[key];
+  });
 
   // Setup the script rules
   appPackage.scripts = {};
-  ['start', 'build', 'eject'].forEach(function(command) {
+  ['start', 'build', 'eject', 'test'].forEach(function(command) {
     appPackage.scripts[command] = 'react-scripts ' + command;
   });
 

scripts/test.js

@@ -0,0 +1,29 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+process.env.NODE_ENV = 'test';
+
+const createJestConfig = require('./utils/create-jest-config');
+const jest = require('jest');
+const path = require('path');
+const paths = require('../config/paths');
+
+const argv = process.argv.slice(2);
+
+const index = argv.indexOf('--debug-template');
+if (index !== -1) {
+  argv.splice(index, 1);
+}
+
+argv.push('--config', JSON.stringify(createJestConfig(
+  relativePath => path.resolve(__dirname, '..', relativePath),
+  path.resolve(paths.appSrc, '..')
+)));
+
+jest.run(argv);

scripts/utils/create-jest-config.js

@@ -0,0 +1,28 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+module.exports = (resolve, rootDir) => {
+  const config = {
+    automock: false,
+    moduleNameMapper: {
+      '^[./a-zA-Z0-9$_-]+\\.(jpg|png|gif|eot|svg|ttf|woff|woff2|mp4|webm)$': resolve('config/jest/FileStub.js'),
+      '^[./a-zA-Z0-9$_-]+\\.css$': resolve('config/jest/CSSStub.js')
+    },
+    persistModuleRegistryBetweenSpecs: true,
+    scriptPreprocessor: resolve('config/jest/transform.js'),
+    setupFiles: [
+      resolve('config/polyfills.js')
+    ],
+    testEnvironment: 'node'
+  };
+  if (rootDir) {
+    config.rootDir = rootDir;
+  }
+  return config;
+};