While jsdom is only an approximation of how the browser works, it is often good enough for testing React components.

So If I click on a new question, it routes me to a new page which is "NewQuestion.tsx" and I enter everything in the inputbox and submit my post which goes into the database. If you'd like to assert, and manipulate your rendered components you can use react-testing-library, Enzyme, or React's TestUtils.
Just render the component without any expected state and assert that it doesn’t crash.

If the React element was previously rendered into container, this will perform an update on it and only mutate the DOM as necessary to reflect the latest React element..

React Testing Library is a different testing library in that it tests the surface of your component rather than the internals.

A short guide to all the exported functions in React Testing Library.

Tagged with react, tdd, testing. It provides light utility functions on top of react-dom and react-dom/test-utils, in a way that encourages better testing practices. Jest is a JavaScript test runner that lets you access the DOM via jsdom. That’s why we need the “get methods”, a.k.a queries, described in the React Testing Library API. Because querying the entire document.body is very common, DOM Testing Library also exports a screen object which has every query that is pre-bound to document.body (using the within functionality). renderResult provides methods that make it easier to search for the elements in the DOM. The component is connected to React Router. All of the queries exported by DOM Testing Library accept a container as the first argument.

It's a great library that I like, it's (relatively) easy to start with and it encourages good testing practices and you can also use it without Jest.

First we make sure the component renders a param from the initial URL. DOM Testing. 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.
You have to run yarn add --dev @testing-library/react to use react-testing-library.

https://testing-library.com/docs/react-testing-library/setup; What you did: Followed the docs for adding a custom renderer. Jest provides a great iteration speed combined with powerful features like mocking modules and timers so you can have more control over how the code executes. Les Hooks ne fonctionneront pas si vous oubliez de mettre à jour React DOM, par exemple. React Testing Library is a DOM testing library, which means, instead of dealing with instances of rendered React components, it handles DOM elements and how they behave in front of real users. Whether you want to have bookmarkable URLs for your web app or a composable way to navigate in React Native, React Router works wherever React is rendering--so take your pick!

React Testing Library: React Testing Library is a very light-weight solution for testing React components. Follow me on Twitter, happy to take your suggestions on topics or improvements /Chris.


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