前端测试工具testing-library

一、下载依赖
npm install --save-dev @testing-library/react

在根目录src创建setupTests.ts：
import ‘@testing-library/jest-dom/extend-expect’;

二、使用
创建test.jsx文件：
import React from ‘react’;
import { render } from ‘@testing-library/react’;
import Button from ‘./button’

test(‘our first react test case’, () => {
const wrapper = render(Nice)
const element = wrapper.queryByText(‘Nice’)
expect(element).toBeTruthy()
expect(element).toBeInTheDocument()
})

npm run test