2022-03-16
3344
#jest#react
Juan Cruz Martinez
34905
Mar 16, 2022 â‹… 11 min read

React app testing: Jest and React Testing Library

Juan Cruz Martinez I'm an entrepreneur, developer, author, speaker, YouTuber, and doer of things.

Recent posts:

8 best Go web frameworks for 2025

The 8 best Go web frameworks for 2025: Updated list

Looking for the best Go frameworks? Compare the top 8 Go web frameworks for 2025, including Gin, Fiber, Echo, and Beego, with pros, cons, and performance insights.

Victor Jonah
Apr 3, 2025 â‹… 15 min read
Making Your First Game In Excalibur.js

Game development for frontend: Building with Excalibur.js

Build your first 2D browser game using JavaScript and the Excalibur.js library, covering essential game development concepts.

Yashodhan Joshi
Apr 3, 2025 â‹… 25 min read
angular vs react

Angular vs. React: Which one should you choose?

Explore the key differences between Angular and React, their strengths, and use cases to help developers decide which option to choose.

Oscar Jite-Orimiono
Apr 2, 2025 â‹… 5 min read
axios in javascript

Axios in JavaScript: How to make GET, POST, PUT and DELETE requests

Learn how to use Axios in JavaScript for GET, POST, PUT & DELETE requests. Examine setup, error handling, and API best practices.

Faraz Kelhini
Apr 1, 2025 â‹… 19 min read
View all posts

2 Replies to "React app testing: Jest and React Testing Library"

  1. There is a missing chunk of code on the bottom of the first code block for App.js. The code does not work as it is. If you are stuck there, use the following code.

    “`
    import ‘./App.css’;
    import { useState, useEffect } from ‘react’;
    import { formatUserName } from ‘./utils’;

    function App() {
    const [users, setUsers] = useState([]);
    // load data from server

    useEffect(()=> {
    let mounted = true;
    const getUsers = async () => {
    await fetch(‘https://jsonplaceholder.typicode.com/users’)
    .then(response => response.json())
    .then((data) => {
    if (mounted) {
    setUsers(data);
    }
    })
    }
    getUsers();
    },[]);

    return (

    Users:

    {
    users.map( user => (
    { user.name } { formatUserName(user.username) }
    ))
    }

    );
    }

    export default App;
    “`

Leave a Reply