First, you need to enable Babel support in Jest as documented in our tutorial for getting started with Jest. We will implement a simple module that fetches user data from an API and then returns the user's age. // user.js import request from './request'; export function getUserName(user...
Because the code we are testing is asynchronous, we have 2 options to make Jest aware of when the test has finished running. The way I prefer is just by declaring the test function as async, and then using await for the asynchronous code within the test. ...
import "@testing-library/jest-dom/extend-expect"; import { render, cleanup, fireEvent, waitForElement } from '@testing-library/react'; import TestAsync from '../components/TestAsync' afterEach(cleanup); it('increments counter after 0.5s', async () => { const { getByTestId, getByText } ...
测试结果：
async function showData() { let res = await Users.all(); console.log(res.data); } showData(); console.log('finished') Theusers-app.jsis the application that usesusers.jsmodule to get and output data. $ json-server --watch users.json ...
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...
import "@testing-library/jest-dom/extend-expect"; import { render, cleanup, fireEvent, waitForElement } from '@testing-library/react'; import TestAsync from '../components/TestAsync' afterEach(cleanup); it('increments counter after 0.5s', async () => { ...
//profile.tsximport*asReactfrom'react';importaxiosfrom'axios';import{useEffect,useState}from'react';constProfile=()=>{const[isLoading,setIsLoading]=useState(true);const[username,setUsername]=useState('');const[errorMessage,setErrorMessage]=useState('');useEffect(()=>{asyncfunctionfetchData(){try...
The axe function allows options to be set with the same options as documented in axe-core: const { axe, toHaveNoViolations } = require('jest-axe') expect.extend(toHaveNoViolations) it('should demonstrate this matcher`s usage with a custom config', async () => { const render = () ...
TestUtils.ts chore: use import type (jestjs#9693) Mar 24, 2020 babel.config.js Handle ERR_REQUIRE_ESM when reading configuration (jestjs#9573) Feb 16, 2020 crowdin.yaml Upgrade prettier (jestjs#6846) Aug 15, 2018 jest set correct stack trace for async rejections of non-errors (jestjs...