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单元测试设置

¥Unit Testing Setup

Ionic 需要一些额外的步骤来设置单元测试。如果你使用的是 Ionic 入门项目，这些步骤已经为你完成。

¥Ionic requires a few additional steps to set up unit tests. If you are using an Ionic starter project, these steps have already been completed for you.

安装 React 测试库​

¥Install React Testing Library

React 测试库是一组实用程序，可以更轻松地测试 React 组件。它用于与组件交互并测试它们的行为。

¥React Testing Library is a set of utilities that make it easier to test React components. It's used to interact with components and test their behavior.

npm install --save-dev @testing-library/react @testing-library/jest-dom @testing-library/user-event

初始化 Ionic React​

¥Initialize Ionic React

Ionic React 要求在运行任何测试之前调用 setupIonicReact 函数。如果不这样做，将导致基于模式的类和平台行为无法应用于你的组件。

¥Ionic React requires the setupIonicReact function to be called before any tests are run. Failing to do so will result in mode-based classes and platform behaviors not being applied to your components.

在 src/setupTest.ts 中添加以下代码：

¥In src/setupTest.ts, add the following code:

import '@testing-library/jest-dom/extend-expect';

+ import { setupIonicReact } from '@ionic/react';

+ setupIonicReact();

// Mock matchmedia
window.matchMedia = window.matchMedia || function () {
  return {
    matches: false,
    addListener: function () { },
    removeListener: function () { }
  };
};

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