Jest 是一个功能丰富的JavaScript测试框架,而React Testing Library 是一种提倡以用户角度编写测试的库,它鼓励测试组件的行为而不是内部实现细节。 安装和配置 首先,确保你已经安装了react,react-dom,jest,@testing-library/react, 和@testing-library/jest-dom。在你的package.json中添加以下依赖: npm install --sav...
import React from 'react'; import { render } from '@testing-library/react'; import HelloWorld from './HelloWorld'; test('renders a message', () => { const { getByText } = render(<MyComponent message="Hello, World!" />); const messageElement = getByText(/Hello, World!/i); expect...
In this post, we'll learn how to test the props a React Function Component receives with React Testing Library and Jest.2023 October update: the article got popular and I also found new ways to test component props, especially ones that don't stringify well, such as big Immutable.Map. ...
importReactfrom"react";import{render,screen}from"@testing-library/react";importPostsfrom"./Posts";importserverfrom"../../mocks/server";import{rest}from"msw";importCONSTANTSfrom"../../constants";describe("Posts test suite",()=>{test("Renders the component with loading state",async()=>{...
Testing: import Reactfrom'react'import { render, fireEvent, waitFor }from'@testing-library/react'import { loadGreeting as mockLoadGreeting } from '../extra/api'import'@testing-library/jest-dom/extend-expect'import { GreetingLoader }from'../extra/greeting-loader-01-mocking'//mock all the expo...
function ButtonComponent() { return Click me; } export default ButtonComponent; 可以使用getByText方法查找按钮元素: // ButtonComponent.test.js import React from 'react'; import { render, screen } from '@testing-library/react'; import ButtonComponent...
在项目中配置Jest和React-Testing-Library,通常需要在项目根目录创建一个jest.config.js文件,配置Jest的运行选项,例如指定测试文件的查找模式等: module.exports = { testMatch: ['**/?(*.)+(spec|test).js'], moduleNameMapper: { '\\.(css|scss|less)$': '<rootDir>/__mocks__/styleMock.js', ...
React-Testing-Library 提供了丰富的API和方法来帮助你编写测试。以下是一些常用的API: render:渲染组件并返回一个渲染对象。 fireEvent:模拟各种用户事件,如点击、输入等。 findByTestId:查找具有特定data-testid属性的元素。 expect:断言组件的状态是否符合预期。
Testing Library encourages you to avoid testing implementation details like the internals of a component you're testing.测试库鼓励您避免测试实现细节,例如您正在测试的组件的内部结构。 所以,Jest Mock 的意义就在于可以帮助我们完成下面这些事情: 有些模块可能在测试环境中不能很好地工作,或者对测试本身不是很...
Jest 和 React Testing Library (RTL) 是前端开发中用于测试 React 应用的首选工具。Jest 是一个功能丰富的JavaScript测试框架,而React Testing Library 是一种提倡以用户角度编写测试的库,它鼓励测试组件的行为而不是内部实现细节。 安装和配置 首先,确保你已经安装了react, react-dom, jest, @testing-library/react...