// MyComponent.test.js import React from 'react'; import { render } from '@testing-library/react'; import MyComponent from './MyComponent'; jest.mock('./MyComponent', () => { return () => <div>Mocked Component</
If you have a component that makes HTTP requests, you’ll probably want to mock those out for UI unit and integration tests. Let’s see how to use jest’s built-in mocking capabilities to do that. Component: import Reactfrom'react'import { loadGreeting }from'./api'function GreetingLoader...
使用jest.fn()创建mock 函数注入到 React props 中,或者直接注入到任何正在测试的函数中。如: const clickFn = jest.fn(); const component = shallow(<MyComponent onClick={clickFn} />); // or function(arg1, arg2, clickFn); 这非常有用,可以在声明 mock 函数时直接指定返回值,也可以使用 API(...
我想使用 Jest 的.mock()方法来模拟子组件,这样就不用担心测试了。 我知道我可以模拟一个直接的组件,例如: jest.mock('./ComponentToMock', () => 'ComponentToMock'); 但是,由于该组件通常会接收道具,因此 React 会感到不安,并发出有关未知道具(在本例中为testProp)被传递给<ComponentToMock />的警告。
There are some situations where you want to focus your tests on a particular component and not any of its children. There are other situations where you want to mock out the behavior of components that your component renders. In the case of react-transition-group, we don’t want to have ...
这里我们创建了一个 mock 方法 onClickMock 并将它作为回到函数传递给 Button 组件。然后利用 ReactTestUtils.Simulate.click 模拟触发点击事件。最后确认一下 onClickMock 被调用。注：关于 mock 方法的使用，在上一篇文章中有详细介绍，欢迎阅读。接下来让我们测试一下点击过后 200 毫秒内进入禁用状态：由于涉及到...
To mock a React component, the most straightforward approach is to use the jest.mock function. You mock the file that exports the component and replace it with a custom implementation. Since a component is basically a function, the mock should also return a function. The implementation would ...
在React Native中使用Jest测试`componentWillMount`方法的步骤如下: 1. 首先,确保你已经安装了Jest和相关的测试库。可以通过运行以下命令来安装它们: `...
If you have a component that makes HTTP requests, you’ll probably want to mock those out for UI unit and integration tests. Let’s see how to use jest’s built-in mocking capabilities to do that. Component: import Reactfrom'react'import { loadGreeting }from'./api'function GreetingLoader...
jest.mock 通过jest.mock ,直接指定工厂函数入参,便可以完成对特定三方依赖的模拟 import { jest } from '@jest/globals'; jest.mock('react-i18next', () => ({ useTranslation: () => { return { t: (str: string) => str, }; }, })); 而在模拟模块上,我们还有不少 API 可以调用,用来单独...