Vitest

A blazing fast unit-test framework
powered by Vite ⚡️

Currently in close beta exclusively for Sponsors

Early Access GitHub Twitter

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Features

Vite's config, transformers, resolvers, and plugins.
Use the same setup from your app to run the tests!
Smart & instant watch mode, like HMR for tests!
Components testing for Vue, React, Lit and more
Out-of-box TypeScript / JSX support
ESM first, top level await
Workers multi-threading via Piscina
Filtering, timeouts, concurrent for suite and tests
Jest Snapshot
Chai built-in for assertions + Jest expect compatible APIs
Sinon built-in for mocking
jsdom or happy-dom for DOM mocking
Native code coverage via c8

Made by

Anthony Fu

A fanatical open sourceror.
Core team member of Vite & Vue.
Working at NuxtLabs.

Sponsor

Patak

A collaborative being.
Core team member of Vite.
Team member of Vue.

Sponsor

By sponsoring one of above creators with certain tier, you can grant the access to the source code, issue tracker, and an invitation to our Discord server. You are able to participant with internal decisions and get directly help from us during the close beta. Once we feel it's ready, we will open source it and you will be recognized as the sponsor of Vitest.

Thanks!