➕ Add jest

Author: tangweikun

.gitignore

@@ -0,0 +1 @@
+/node_modules

package.json

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+{
+  "name": "javascript-design-patterns",
+  "version": "1.0.0",
+  "main": "index.js",
+  "repository": "https://github.com/tangweikun/javascript-design-pattern.git",
+  "author": "tangweikun <819573105@qq.com>",
+  "license": "MIT",
+  "scripts": {
+    "watch": "jest --watch"
+  },
+  "babel": {
+    "presets": ["es2015", "stage-2"]
+  },
+  "dependencies": {
+    "babel-cli": "^6.26.0",
+    "babel-core": "^6.26.0",
+    "babel-jest": "^22.4.0",
+    "babel-preset-env": "^1.6.1",
+    "babel-preset-es2015": "^6.24.1",
+    "babel-preset-stage-2": "^6.24.1",
+    "jest": "^22.4.0",
+    "regenerator-runtime": "^0.11.1"
+  }
+}

src/creational/factory/simple-factory/UserFactory.js

@@ -1,16 +1,16 @@
 // 抽象产品角色 <Product>
 function Admin() {
-  console.log('Admin created!')
+  return 'Admin created'
 }
 function Customer() {
-  console.log('Customer created')
+  return 'Customer created'
 }
 
 // 工厂角色 <Factory>
-const UserFactory = {}
+export const UserFactory = {}
 UserFactory.createUser = function(type) {
-  if (type === 'admin') return new Admin()
-  if (type === 'customer') return new Customer()
+  if (type === 'admin') return Admin()
+  if (type === 'customer') return Customer()
 }
 
 // 具体产品角色 <ConcreteProduct>

src/creational/factory/simple-factory/__tests__/UserFactory.spec.js

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+import { UserFactory } from '../UserFactory'
+
+test('UserFactory-admin', () => {
+  const admin = UserFactory.createUser('admin')
+  expect(admin).toBe('Admin created')
+})
+
+test('UserFactory-customer', () => {
+  const customer = UserFactory.createUser('customer')
+  expect(customer).toBe('Customer created')
+})