# Vitest
URL: https://wwadd.dev/tools/vitest · Official site: https://vitest.dev/guide/
Kind: Vite-powered test framework · License: Open source · Last verified: 2026-09-30

A test runner for JavaScript and TypeScript with assertions, mocking, and coverage integration.

Reach for it when:
- Testing application rules and modules
- Projects that benefit from Vite configuration reuse

Worth knowing: Check current Node and Vite requirements. A passing unit suite does not verify browser behavior.