自动化测试 Jest实践

起步

 jest --init

按照文档写了一个测试用例

// last.ts
function last(array: any[]) {
    const length = array == null ? 0 : array.length
    return length ? array[length - 1] : undefined
}
export default last
// __test__/last.test.ts
test("get array last element", () => {
    expect(last([1, 2, 3])).toBe(3)
})

  "scripts": {
    "test": "jest",
    "test:watch": "jest --coverage --watch",
    "test:prod": "npm run lint && npm run test -- --no-cache"
  },

npm run test

last.ts: Unexpected token, expected “,” (9:19)

然后开始配置babel
yarn add --dev babel-jest @babel/core @babel/preset-env @babel/preset-typescript

// babel.config.js

参考链接

羚珑项目自动化测试方案实践