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在 TypeScript 中使用 react 

export interface Props {
  name: string;
}

class Hello extends React.Component<Props, State> { // 这里为 TS 里类的语法
  render() {
    return (
        ...
    );
  }
}
<Hello name="world" />

测试库比较

和 React 相关的测试库

  • Test Renderer: 官方提供的 React 渲染库，不依赖 UI，纯 JavaScript 对象；
  • Test Utilities: 官方提供的测试工具库;
  • enzyme: 基于 Test Utilities 的封装，更易使用；

Jest 与 Mocha 的比较

Jest 各个功能封装得比较全面，类似 express;
Mocha 给的自由度更高，需自行搭配其它库，类似 koa;

需要操作 UI 的时候，有两个概念 1.mock(spy) 和 2.单一 dom。

  • mock: 可以理解成监视函数，可以用来判断执行某个事件时候该函数是否执行；
  • 单一 dom: Jest 已经集成了这个单一 dom 这个条件，mocha 需要配合 jsdom 来使用;

和 mocha 搭配的库

  • jsdom: 控制台的浏览器环境;
  • chai: 搭配 mocha 使用的断言库;
  • chai-spies: 同上述 mock;

测试方式

  • BDD(Behaviour Driven Development): should/expect
  • TDD(Test Driven Development): assert

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