feat!: add support for mocha test runner

BREAKING CHANGE: zora and mocha are dev dependencies

.eslintrc.js

@@ -0,0 +1,24 @@
+'use strict';
+
+const { rules: jestRules } = require('@moxy/eslint-config-jest/lib/rules/jest');
+
+module.exports = {
+    root: true,
+    parser: "@babel/eslint-parser",
+    env: {
+        node: true,
+    },
+    extends: [
+        "@moxy/eslint-config-base/cjs",
+        "@moxy/eslint-config-jest"
+    ],
+    overrides: [
+        {
+            files: "fixtures/**",
+            rules: Object.entries(jestRules).reduce((rules, [key, value]) => ({
+                ...rules,
+                [key]: 'off',
+            }), {}),
+        },
+    ],
+};

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2020 André Costa Lima <andreclima.pt@gmail.com>
+Copyright (c) 2021 André Costa Lima <andreclima.pt@gmail.com>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -17,33 +17,43 @@
 $ npm install -D react-native-test-runner
 ```
 
+## Features 
+
+- Supported test runners
+    - [Zora](https://github.com/lorenzofox3/zora)
+    - [Mocha](https://github.com/mochajs/mocha/)
+- Supported assertion libraries
+    - [Chai](https://www.chaijs.com/)
+- React Native version selection
+- iOS runtime and simulator selection
+- Android AVD selection
+
 ## Limitations
 
-- Support for [Zora](https://github.com/lorenzofox3/zora) test runner only.
-- No coverage.
-- Only iOS simulators and Android emulators are supported.
+- No coverage output.
+- No support for Windows and MacOS.
 - JavaScriptCore (JSC) engine only on both Android and iOS.
 - No TypeScript (TS) support yet.
 - Not yet possible to run tests against native modules.
 ## Usage
 
 ```
 Usage
-    $ rn-test [--platform 'ios' | --platform 'android'] [globs ...]
+    $ rn-test --platform ['ios' | 'android'] [--simulator ios_simulator | --emulator android_avd] [globs ...]
 
     Default glob: **/test?(s)/**/?(*.)+(spec|test).js.
 
 Options
-    --plaform, -p    Platform on which to run the test suites on. Options: 'ios', 'android'.
-    --simulator, -s  iOS simulator to run the test suites on.
-    --emulator, -e   Android emulator or virtual device (AVD) to run the test suites on.
-    --metroPort, -p  Port on which Metro's server should listen to. Default: 8081.
-    --cwd            Current directory. Default: process.cwd().
-    --rn             React Native version to test against. Default: 0.63.4.
-    --app            Absolute path to the test app. Default: ~/.npm/rn-test-app.
+    --plaform, -p    Platform on which to run the test suite on. One of: 'ios', 'android'.
+    --simulator, -s  iOS simulator to run the test suite on.
+    --emulator, -e   Android emulator or virtual device (AVD) to run the test suite on.
+    --metroPort, -p  Port on which Metro's server should listen to. [Default: 8081]
+    --cwd            Current directory. [Default: process.cwd()]
+    --rn             React Native version to use. [Default: 0.63.4]
+    --runner, -r     Test runner to use. One of: 'zora', 'mocha'. [Default: 'zora']
 
 Examples
-    # Run tests on iPhone 11 simulator with iOS version 14.1
+    # Run tests on iPhone 11 simulator with iOS version 14.1 runtime
     $ rn-test --platform ios --simulator 'iPhone 11 (14.1)' 'test/**/*.test.js'
 
     # Run tests on iPhone 11 simulator with whatever iOS version is available

app/index.js

@@ -4,10 +4,10 @@ import { filterRNLogs } from './utils';
 const App = () => null;
 
 filterRNLogs();
-LogBox.ignoreAllLogs();
+LogBox?.ignoreAllLogs?.();
 AppRegistry.registerComponent('Test', () => App);
 
-const setup = require('./test-runners/zora').default;
+const setup = require('runner');
 
 const run = setup();
 

app/utils.js

@@ -1,5 +1,8 @@
 const filterRNLogs = () => {
-    const filters = ['^Running "Test"'].join('|');
+    const filters = [
+        '^Running "Test"',
+        'Require cycles are allowed, but can result in uninitialized values.',
+    ].join('|');
     const filterRegExp = new RegExp(filters);
 
     [
@@ -8,18 +11,15 @@ const filterRNLogs = () => {
         'warn',
         'error',
         'log',
-        'group',
-        'groupCollapsed',
-        'groupEnd',
         'debug',
     ].forEach((level) => {
-        const originalFunction = console[level];
+        const originalFn = console[level];
 
         console[level] = (...args) => {
-            if (args?.[0].match(filterRegExp)) {
+            if (args?.[0]?.match(filterRegExp)) {
                 return;
             }
-            originalFunction.apply(console, args);
+            originalFn.apply(console, args);
         };
     });
 };

cli/bundle-progress/ora.js

@@ -5,8 +5,12 @@ const ora = require('ora');
 class OraBundleProgressBar {
     loader = ora();
 
+    constructor(testRunner) {
+        this.testRunner = testRunner;
+    }
+
     onStart() {
-        this.loader.start('Bundling JavaScript');
+        this.loader.start(`Bundling JavaScript to execute tests with ${this.testRunner} test runner`);
     }
 
     onProgress(/* { transformedFileCount, totalFileCount } */) {}
@@ -15,7 +19,7 @@ class OraBundleProgressBar {
         this.loader.succeed();
     }
 
-    onError(error) {
+    onError({ error }) {
         this.loader.fail();
         console.error(error);
     }

cli/test-app.js → cli/create-test-app.js

@@ -12,13 +12,13 @@ const semver = require('semver');
 
 const rmdir = promisify(fs.rmdir);
 
-const createTestApp = async ({
+module.exports = async ({
     reactNativeVersion = '0.63.4',
     appPath = path.join(os.homedir(), '.npm', 'rn-test-app'),
 } = {}) => {
     const loader = ora();
 
-    const removeApp = async () => {
+    const remove = async () => {
         loader.start(`Removing test app at ${appPath}`);
         try {
             await rmdir(appPath, { recursive: true });
@@ -38,12 +38,12 @@ const createTestApp = async ({
     }
 
     if (appPkg && semver.neq(reactNativeVersion, appPkg.dependencies['react-native'])) {
-        await removeApp();
+        await remove();
         appPkg = null;
     }
 
     if (appPkg) {
-        return ({ removeApp, appPath });
+        return appPath;
     }
 
     try {
@@ -67,12 +67,5 @@ const createTestApp = async ({
         throw error;
     }
 
-    return ({
-        removeApp,
-        appPath,
-    });
-};
-
-module.exports = {
-    createTestApp,
+    return appPath;
 };