Overview
Vitest is a Vite-native testing framework designed to seamlessly integrate with Vite applications. By leveraging Vite's configuration and plugins, Vitest offers a consistent testing experience across the entire application. It reuses Vite's resolve and transform pipelines, resulting in faster test execution and a more streamlined development workflow. Vitest is also Jest-compatible, making migration straightforward for projects already using Jest. It supports features like expect, snapshot testing, and coverage reporting. Moreover, Vitest's smart and instant watch mode only re-runs tests related to changed files, similar to HMR, further enhancing development speed. Vitest supports ESM, TypeScript, and JSX out-of-the-box, powered by Oxc. Vitest is suitable for both frontend and backend testing.