Vite is a French word meaning “quick”. This cute little puppy also looks quick. Photo by Leo Rivas on Unsplash

Introduction to Vitest: in-source testing using Typescript

Vitest is a JavaScript testing toolkit designed to make setting up, writing, and running tests easy. It’s packed with cool features which makes it a great alternative to Jest.

Published in

CodeX

6 min readNov 27, 2022

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Kris Raven

Written by Kris Raven

Writer for

CodeX

Quality Engineering Manager | A wholesome mix of QA, Automated Testing, music and philosophy | Enjoys unit tests | Favours integration tests

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Using Jest Unit Tests to successfully test map functions

Today we’re going to demonstrate how map works and how implementing map a certain way can break a test. And how to build it again.

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