From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

Unlock this course with a free trial

Join today to access over 25,200 courses taught by industry experts.

Testing asynchronous data fetching

Testing asynchronous data fetching

From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

Start my 1-month free trial Buy for my team

Testing asynchronous data fetching

“

Welcome! In this session, I'll guide you through one of the most common and important tasks in front-end development – testing components that fetch data from an API. It can seem tricky, because you have to deal with asynchronous operations, loading states, and network requests. But don't worry – by the end of this lecture, you will understand how to test React components that fetch data asynchronously, using React Testing Library's powerful async utilities like FindBy and WaitFor, and you'll master how to mock API calls with Vitest to create fast, reliable, and isolated tests. Alright, let's start by setting up our component and its test file. We will create two files inside your src slash components directory. CourseList.jsx for the component itself, and CourseList.test.jsx for our tests. This is where we'll be writing the code for our component and the tests to ensure it's working correctly. Moving to CourseList.jsx I've created and exported a CourseList component. Now you will see…

Contents