jest踩坑汇总

• 当测试环境为node时
  testEnvironment: ‘node’
  
  添加全局mock数据

Object.defineProperty(global, 'localStorage', {
  value: {
    store: {} as Record,
    setItem(key: string, value: string) {
      this.store[key] = value;
    },
    getItem(key: string) {
      return this.store[key];
    },
    removeItem(key: string) {
      delete this.store[key];
    },
    clear() {
      this.store = {}
    }
  },
  configurable: true,
})

• expect(received).toEqual(expected) // deep equality
  

1. 全局变量
   

2. 插件
   

• Property ‘fromEntries’ does not exist on type ‘ObjectConstructor’. Do you need to change your target library? Try changing the ‘lib’
  compiler option to ‘es2019’ or later.
  tsconfig.json文件修改配置
  “lib”: [
  “esnext” 添加
  ],