Why use react testing library There are 21575 other projects in the npm registry using @testing-library/react. Jan 14, 2025 · Automated testing is considered a best practice by 79% of developers according to Statista. This library is easy to use and integrates seamlessly with React, making it ideal for testing React applications. act. Oct 31, 2023 · Passes it to the @testing-library/dom fireEvent. For this post, we’ll review two of those tools: Enzyme and react-testing-library. Oct 9, 2019 · Basically, React Testing Library (RTL) is made of simple and complete React DOM testing utilities that encourage good testing practices, especially one: The more your tests resemble the way your software is used, the more confidence they can give you. This makes your tests more reliable and maintainable. js file, here we import the jest-dom package so that react can initialize it when setting up the test environment. In fact, many of the React Testing Library maintainers used and contributed to Enzyme for years before developing and working on React Testing Library. enzyme with jest or; react-testing-library with jest; you can also use all three i. “The RTL way” of testing is primarily behavior-driven, with a focus on not testing implementation details of a component. As the other guy said, this is integration testing, and IMO, is just way too inconvenient to write this with react testing library + jest. It's also wrapped in act so you don't need to worry about doing it. I’ll give a brief refresher on why we use user-event in the first place, take a look at When using the React Testing Library to query the rendered DOM for an element that will appear as a result of an asynchronous action, the screen. Mar 12, 2024 · Properly written tests not only help prevent regressions and buggy code, but in the case of React Testing Library, they also improve the accessibility of components and the overall user experience. Why do tests with React Testing Library? Catch bugs - allows you to catch bugs easily. Nov 23, 2023 · user-event is a companion library for Testing Library that provides more advanced simulation of browser interactions than the built-in fireEvent method. RTL’s approach avoids testing the implementation details, thereby making our test code easier to maintain. react-dom/test-utils and react-test-renderer contain a subset of functionality, Enzyme and react-testing-library were built upon them. This article demonstrates how to use Jest with React. But what’s important to note here is that using it isn’t always a bad thing, it In case you’d like to get a head start before we proceed, you can see an example of how to use react-testing-library for React app integration tests here. Dec 4, 2019 · If you only use react-testing-library for testing page level components to prevent duplication and cypress does all that and more (can be used for mocked local tests, deployed to server tests, etc. In this article, Chidi Orji is going to show you how React developers can quickly Dec 1, 2024 · When writing tests with React Testing Library, it's essential to follow best practices to ensure that your tests are reliable and maintainable. Why use React Testing Library? When you get to know about React Testing Library, you might find its resemblance to another popular library, Enzyme. Some key differences: Mar 8, 2025 · Unit Testing with Jest & React Testing Library. This may be useful in asynchronous state updates Dec 21, 2021 · As a bonus, using React Testing Library neatly can actually improve the accessibility of your app (See an article about accessiblity improvement to understand why). React (act is born here) testing-library/dom (provides configure function for testing DOM) react-testing-library (overrides with new function wrapped in act() using configure function Jul 3, 2022 · However, this doesn't address the slowness introduced by the React Testing Library. React Testing Library. So finally I'm coming out with it and explaining why I never use shallow rendering and why I think nobody else should either. Finally, you can combine approaches to test how a user workflow functions from end Oct 14, 2020 · But in this tutorial, we are going to use react-testing-library. Jul 3, 2020 · Testing gives confidence in written code. The same approach applies for testing with React Router, Redux, testing utilities like Apollo, and any other external libraries that components may use. createElement that React uses a Synthetic event system, and Preact uses the browser's native addEventListener for event handling. Ensuring that components behave as expected when developing applications with React is crucial. Some methods like toBeInTheDocument() is not part of React Testing Library, so you will need to install jest-dom to enable it. Since Material UI is in React, it is safe to assume that it will understand the components better than any other library or framework. How to test with React Testing Library? The principle of React Testing Library is to render a component and then simulate some interaction with it, and then finally compare the Feb 8, 2023 · Editor’s Note: This post comparing React testing libraries post was last updated on 8 February 2023 to add sections on testing with Mocha, Chai, and TestCafe. Sep 27, 2024 · What Tools are Needed for React Unit Testing? Setting up a React testing environment requires a few essential tools. Enzyme has been popular for a number of years but React Testing Library, a . One powerful tool for testing React components is the React Testing Library. We’ll also discuss how to migrate from Enzyme to react-testing-library and how to migrate back. 9. End of life This page describes user-event@13. So all you need to do is write your test code. body is very common, DOM Testing Library also exports a screen object which has every query that is pre-bound to document. Here's my main assertion: Nov 1, 2019 · I'm new to React and confused about all the testing libraries. Start using @testing-library/react in your project by running `npm i @testing-library/react`. To set up our app that we'll test, we'll be using Vite. Jan 10, 2023 · React Testing Library is a JavaScript testing utility for React applications that allows developers to write tests that mimic user interactions with their components. What happened: The useEffect hook is not executed correctly inside a jest environment after calling render(<Test />). yarn add --dev @testing-library/react @testing-library/jest-dom. Nov 22, 2024 · When to use React Testing Library. Similar to "use Next. It simplifies handling form inputs, reduces boilerplate code, and provides a performant solution for form management. There's no need to use it. Learn its importance, proper usage, and best practices for handling updates and async operations. However, testing these forms efficiently and accurately is just as important as implementing them. The best part of using the React Testing Library is it will test similarly as a user would explore What kind of DOM testing you do (I am planning to use react-testing-library) Only DOM events - e. Oct 4, 2023 · React Testing Library is a lightweight testing library for React applications. I'm using Next. Since the initial release in 2018 as "React Testing Library", it's grown in popularity beyond its React component testing roots. This approach makes you concentrate on testing the important stuff. React Testing Library If you’d like to test components in isolation from the child components they render, we recommend using react-testing-library. This library prioritizes the principle of testing components as users interact with them, making tests more resilient to code changes. When testing, code that causes React state updates should be wrapped into act(): act(() => { /* fire events that update state */ }); /* assert on the output */ This ensures that you're testing the behavior the user would see in the browser. 📝 Keep in mind mainly when using h / Preact. React Testing Library helps you focus on how users actually use your components. We will briefly look at the differences between the two before looking at some high level examples, and how straightforward it is to add jest-axe to integrate aXe automated accessibility testing. Some popular testing frameworks are Mocha , Jasmine , Tape , QUnit , and AVA . React-testing-library comes installed by default when setting up React apps with create-react-app. Key Features: User-Centric Testing: Encourages tests that mirror real user interactions, improving test reliability and usability. Apr 8, 2023 · The React Testing Library is a powerful and easy-to-use testing utility for React applications. Kent C. The first option is to go ahead with React Testing Library. Nov 17, 2022 · In this article I’ll go over how to upgrade React Testing Library’s user-event package to version 14. Why Invest in Integration Testing? "Integration tests strike a great balance on the trade-offs between confidence and speed/expense. e react-testing-library+Enzyme with jest; but you can not use Enzyme and react-testing-library without jest or any other test runner eg: Mocha Jul 11, 2019 · react-testing-library: I personally like to use react-testing-library but the common way is to use Enzyme. The latest recommended option by the react-testing-library author Kent C. Use it when you need to test rendering and performance at the browser level. when a user clicks, input field has changed, user presses a key. Jul 13, 2021 · It feels like you are trying to test two things in one, the Class Demo behaviour and the Component DemoComponent behaviour. test. js, in case that matters The getByText function is only one of many types of search functions in React Testing Library. A React application created with Create React App (or CRA) already includes both React Testing Library and Jest by default. Let's see how you can do unit testing with react-testing-library Nov 21, 2021 · Warning: An update to UserAndPartnerView inside a test was not wrapped in act(). Dec 18, 2023 · React Testing Library’s main goal is to boost developers’ confidence in their tests by testing components in the way a user would use them. If you want to ensure that your components are rendering and behaving correctly, React Testing Library may be a better choice. body (using the within functionality). It’s closer to integration testing than unit testing. I have written shallow tests before. Sep 9, 2022 · 3. Without automated testing, it is significantly harder to ensure the quality of a web application of significant complexity. Jest on the other hand is a test runner and assertion library, more closely comparable to Chai and Mocha. Aug 11, 2022 · Read the RTL (React Testing Library) docs intro page for the quick “why” behind RTL. Aug 27, 2024 · Comparing Testing Solutions. Dec 20, 2024 · While Jest handles the testing framework, React Testing Library focuses on testing React components in a way that mimics how users interact with them. It focuses on testing the behavior of the application by mimicking or simulating how the end user would Jan 15, 2025 · Why should I use React Testing Library? React Testing Library encourages you to write tests that closely resemble how your users interact with your app. Mar 11, 2024 · React Testing Library. Aug 9, 2022 · Why should I use React Testing Library? Enzyme is a powerful test library, and its contributors did a lot for the JavaScript community. Jul 9, 2021 · npm install --save-dev @testing-library/react @testing-library/jest-dom. I will show you one example of Enzyme because it is important to be aware of Enzyme at a basic level and the rest of the examples with react-testing-library. Initially React team created shallow rendering (see react-test-renderer/shallow) and Enzyme team created a wrapper over it to allow emulation of the react class lifecycle. The DOM Testing Library is a simple, lightweight, open source, library that provides API for querying and interacting with DOM nodes. pvvony jjya lau xoapamj byc nass cqdnxfir liklrjw gyrm naxhu slnyq hjajbca depph kqst oyzi