Merge pull request #27 from emin93/ts-jest

Added ts-jest

Author: emin93

README.md

@@ -26,6 +26,7 @@ Actually, when React Native 0.57 was announced, I planned to stop maintenance on
 
 - [TypeScript](https://github.com/Microsoft/TypeScript)
 - [Type definitions for React & React Native](https://github.com/DefinitelyTyped/DefinitelyTyped)
+- [ts-jest](https://github.com/kulshekhar/ts-jest)
 
 This template always uses the latest versions of the dependencies at the time when the `react-native init` command is being executed. This means you don't have to worry about old versions.
 

__tests__/App.tsx

@@ -0,0 +1,14 @@
+/**
+ * @format
+ */
+
+import 'react-native';
+import React from 'react';
+import App from '../App';
+
+// Note: test renderer must be required after react-native.
+import renderer from 'react-test-renderer';
+
+it('renders correctly', () => {
+  renderer.create(<App />);
+});

devDependencies.json

@@ -3,5 +3,6 @@
   "@types/react-native": "latest",
   "@types/react-test-renderer": "latest",
   "@types/react": "latest",
+  "ts-jest": "latest",
   "typescript": "latest"
 }

jest.json

@@ -0,0 +1,8 @@
+{
+  "transform": {
+    "^.+\\.tsx?$": "ts-jest"
+  },
+  "testRegex": "(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$",
+  "moduleFileExtensions": ["ts", "tsx", "js", "jsx", "json", "node"],
+  "modulePaths": ["<rootDir>"]
+}

setup.js

@@ -2,18 +2,21 @@ const fs = require('fs')
 const path = require('path')
 
 const packageJson = require('./package.json')
+const jestConfig = require('./jest.json')
 
 const deleteFile = fileName => fs.unlinkSync(path.join(__dirname, fileName))
 const writeFile = (fileName, data) => fs.writeFileSync(path.join(__dirname, fileName), data)
 
 console.log('🔄 Setting up...')
 
 packageJson.scripts.tsc = 'tsc'
+packageJson.jest = Object.assign(packageJson.jest, jestConfig)
 
 writeFile('package.json', JSON.stringify(packageJson, null, 2))
 
 deleteFile('.flowconfig')
 deleteFile('App.js')
+deleteFile('__tests__/App.js')
 deleteFile('LICENSE')
 deleteFile('README.md')
 deleteFile('setup.js')

tsconfig.json

@@ -4,7 +4,7 @@
     "allowSyntheticDefaultImports": true,
     "esModuleInterop": true,
     "isolatedModules": true,
-    "jsx": "react-native",
+    "jsx": "react",
     "lib": ["es6"],
     "moduleResolution": "node",
     "noEmit": true,