Fast Unit Testing With Vitest
If you’re a developer who values efficiency and speed, you’ll want to make sure that your unit tests are as fast as possible. Vitest is a tool that can help you achieve fast unit testing for your JavaScript code.
What is Vitest?
Vitest is a lightweight and fast unit testing library for JavaScript. It is designed to be simple to use and to provide fast feedback on the status of your code. Vitest is built on top of Jest, the popular JavaScript testing framework, and it leverages Jest’s powerful features while providing a streamlined and faster experience.
Key Features of Vitest
- Fast test execution: Vitest is optimized for speed, allowing you to run your tests quickly and get rapid feedback on your code.
- Minimal configuration: Vitest aims to be easy to set up and use, with minimal configuration required to get started with testing your JavaScript code.
- Jest compatibility: Vitest is built on top of Jest, meaning that it can take advantage of Jest’s powerful assertion library, mocking capabilities, and built-in code coverage tools.
- Concurrent test execution: Vitest supports concurrent test execution, allowing you to take full advantage of modern multi-core processors and run your tests in parallel for even faster feedback.
Getting Started with Vitest
Getting started with Vitest is as simple as installing it via npm and adding a few configuration options to your project. Once you have Vitest set up, you can start writing your unit tests using the familiar Jest syntax, and take advantage of Vitest’s fast test execution capabilities.
Conclusion
If you’re looking for a fast and efficient way to write unit tests for your JavaScript code, Vitest is an excellent choice. Its focus on speed and simplicity makes it a great addition to any developer’s testing toolkit. Give Vitest a try and see how it can help you write and run your unit tests faster than ever before.
Wow .. main panel on right side .. interesting idea :O Why I did not try it ever before?
It's possibly better. I Always hated how the navigation shifting my code, constantly playing with width, switching it on/off etc.
Thx 🙂
Hello!
May i ask you a question?
How can we write unit tests in Nuxt 3 application? I tried '@nuxt/test-utils', 'vitest', Vue testing library, 'nuxt-vitest' and something else (I don't remember everything I tried to use as spent so much time to figure out in that).
I could write test to test simple calculating functions and that was all.
No ability to get DOM element, to simulate user event, to check if some function was invoked, to check state updates – nothing really valuable tests could be written.
Could anybody please advise me where to find the solution?
Thank you!
HI, Jason, what browser are you using? I'm dying to know!
OMG !!!
You need to clear out the mock before or after each test. There are a few way to do so. I think something like this might work:
“`afterEach(() => {
vi.clearAllMocks();
vi.resetAllMocks();
});“`
Very good presentation
Excellent discussion!
Anthony Fu has been a huge blessing to the Vue community. Thanks Jason for having him on.
Amazing Jason
I've got a old Gatsby project at work that uses Jest snapshots and this makes it look practically ancient!
Very cool episode! Vite ecosystem is so good that I might start looking at using Vue instead of React.
Function testing is already fast enough. I expect to see React testing here cause it is really slow with testing library 😥
thanks for your video, it's wonderful!
Anthony Fu! THE LEGEND himself! Thank you Jason
Man… I don´t understand… Why are you with only 34k subscribers? Your channel is one of the best when we talk about programming. Keep doing your job as you do. Congrats man! 💪🏽
Anthony the legend
Wow hahah so they started out with a name. Damn! Another exciting episode Jason