Adding Jest preset so that people can configure Jest using react-native as preset

Reviewed By: cpojer

Differential Revision: D4081817

fbshipit-source-id: 43cf2ec467ea69651705162b6a58e0b3f1ad1dbf

Author: Cristian Carlesso

jest-preset.json

@@ -0,0 +1,25 @@
+{
+  "haste": {
+    "defaultPlatform": "ios",
+    "platforms": ["android", "ios"],
+    "providesModuleNodeModules": [
+      "react",
+      "react-native"
+    ]
+  },
+  "moduleNameMapper": {
+    "^image![a-zA-Z0-9$_-]+$": "GlobalImageStub",
+    "^[./a-zA-Z0-9$_-]+\\.(bmp|gif|jpg|jpeg|png|psd|svg|webp)$": "RelativeImageStub"
+  },
+  "modulePathIgnorePatterns": [
+    "<rootDir>/node_modules/react-native/Libraries/react-native/",
+    "<rootDir>/node_modules/react-native/packager/"
+  ],
+  "preprocessorIgnorePatterns": [
+    "node_modules/(?!(jest-)?react-native|react-clone-referenced-element)"
+  ],
+  "setupFiles": [
+    "<rootDir>/node_modules/react-native/jest/setup.js"
+  ],
+  "testEnvironment": "node"
+}

jest/setup.js

@@ -20,6 +20,7 @@ global.Promise = require.requireActual('promise');
 global.regeneratorRuntime = require.requireActual('regenerator-runtime/runtime');
 
 jest
+  .mock('setupDevtools')
   .mock('npmlog');
 
 // there's a __mock__ for it.
@@ -113,7 +114,17 @@ const mockNativeModules = {
     ),
     prefetchImage: jest.fn(),
   },
+  KeyboardObserver: {
+    addListener: jest.fn(),
+    removeListeners: jest.fn(),
+  },
   ModalFullscreenViewManager: {},
+  Networking: {
+    sendRequest: jest.fn(),
+    abortRequest: jest.fn(),
+    addListener: jest.fn(),
+    removeListeners: jest.fn(),
+  },
   SourceCode: {
     scriptURL: null,
   },
@@ -142,6 +153,15 @@ const mockNativeModules = {
       Constants: {},
     },
   },
+  WebSocketModule: {
+    connect: jest.fn(),
+    send: jest.fn(),
+    sendBinary: jest.fn(),
+    ping: jest.fn(),
+    close: jest.fn(),
+    addListener: jest.fn(),
+    removeListeners: jest.fn(),
+  },
 };
 
 Object.keys(mockNativeModules).forEach(module => {

local-cli/generator/index.js

@@ -10,8 +10,8 @@
 
 var fs = require('fs');
 var path = require('path');
-var yeoman = require('yeoman-generator');
 var utils = require('../generator-utils');
+var yeoman = require('yeoman-generator');
 
 module.exports = yeoman.generators.NamedBase.extend({
   constructor: function() {
@@ -114,7 +114,7 @@ module.exports = yeoman.generators.NamedBase.extend({
 
     this.npmInstall(`react@${reactVersion}`, { '--save': true, '--save-exact': true });
     if (!this.options['skip-jest']) {
-      this.npmInstall(`jest babel-jest jest-react-native babel-preset-react-native react-test-renderer@${reactVersion}`.split(' '), {
+      this.npmInstall(`jest babel-jest babel-preset-react-native react-test-renderer@${reactVersion}`.split(' '), {
         saveDev: true,
         '--save-exact': true
       });
@@ -145,7 +145,7 @@ module.exports = yeoman.generators.NamedBase.extend({
       );
       packageJSON.scripts.test = 'jest';
       packageJSON.jest = {
-        preset: 'jest-react-native'
+        preset: 'react-native'
       };
       fs.writeFileSync(packageJSONPath, JSON.stringify(packageJSON, null, '\t'));
     }

package.json

@@ -102,24 +102,25 @@
   },
   "main": "Libraries/react-native/react-native.js",
   "files": [
-    "React",
-    "React.podspec",
-    "ReactAndroid",
-    "ReactCommon",
-    "react.gradle",
+    ".flowconfig",
     "android",
-    "Libraries",
-    "lib",
-    "packager",
     "cli.js",
-    "local-cli",
+    "flow",
     "init.sh",
+    "jest-preset.json",
+    "jest",
+    "lib",
+    "Libraries",
     "LICENSE",
+    "local-cli",
+    "packager",
     "PATENTS",
-    "README.md",
-    "jest",
-    ".flowconfig",
-    "flow"
+    "react.gradle",
+    "React.podspec",
+    "React",
+    "ReactAndroid",
+    "ReactCommon",
+    "README.md"
   ],
   "scripts": {
     "test": "jest",

scripts/run-ci-e2e-tests.js

@@ -57,7 +57,7 @@ try {
     }
   }
 
-  if (argv['android']) {
+  if (argv.android) {
     if (exec('./gradlew :ReactAndroid:installArchives -Pjobs=1 -Dorg.gradle.jvmargs="-Xmx512m -XX:+HeapDumpOnOutOfMemoryError"').code) {
       echo('Failed to compile Android binaries');
       exitCode = 1;
@@ -88,7 +88,7 @@ try {
 
   cd('EndToEndTest');
 
-  if (argv['android']) {
+  if (argv.android) {
     echo('Running an Android e2e test');
     echo('Installing e2e framework');
     if (tryExecNTimes(
@@ -122,7 +122,7 @@ try {
       exitCode = 1;
       throw Error(exitCode);
     }
-    let packagerEnv = Object.create(process.env);
+    const packagerEnv = Object.create(process.env);
     packagerEnv.REACT_NATIVE_MAX_WORKERS = 1;
     // shelljs exec('', {async: true}) does not emit stdout events, so we rely on good old spawn
     const packagerProcess = spawn('npm', ['start'], {
@@ -146,7 +146,7 @@ try {
     }
   }
 
-  if (argv['ios']) {
+  if (argv.ios) {
     echo('Running an iOS app');
     cd('ios');
     // Make sure we installed local version of react-native
@@ -156,7 +156,7 @@ try {
       throw Error(exitCode);
     }
     // shelljs exec('', {async: true}) does not emit stdout events, so we rely on good old spawn
-    let packagerEnv = Object.create(process.env);
+    const packagerEnv = Object.create(process.env);
     packagerEnv.REACT_NATIVE_MAX_WORKERS = 1;
     const packagerProcess = spawn('npm', ['start', '--', '--non-persistent'],
       {
@@ -183,7 +183,7 @@ try {
     cd('..');
   }
 
-  if (argv['js']) {
+  if (argv.js) {
     // Check the packager produces a bundle (doesn't throw an error)
     if (exec('react-native bundle --platform android --dev true --entry-file index.android.js --bundle-output android-bundle.js').code) {
       echo('Could not build android package');
@@ -200,13 +200,11 @@ try {
       exitCode = 1;
       throw Error(exitCode);
     }
-    // Temporarily removed jest test until a RN fix to jest lands in a couple of days
-    // ping @bestander after 27.09.2016 if you see this
-    // if (exec(`npm test`).code) {
-    //   echo('Jest test failure');
-    //   exitCode = 1;
-    //   throw Error(exitCode);
-    // }
+    if (exec('npm test').code) {
+      echo('Jest test failure');
+      exitCode = 1;
+      throw Error(exitCode);
+    }
   }
   exitCode = 0;