skilld
All skills
antfu avatar

/vitest

@d02c484 official
by Anthony Fuantfu/skills5.9k stars
335

Vitest fast unit testing framework powered by Vite with Jest-compatible API. Use when writing tests, mocking, configuring coverage, or working with test filtering and fixtures.

Ask your Agent

Use this Skill: https://skilld.dev/gh/antfu/skills/vitest

This session only. Nothing lands on disk.

GENERATION.md

≈34 tokens on demand. Your agent reads this file only when SKILL.md points to it.

Generation Info

  • Source: sources/vitest
  • Git SHA: ea1c44fb581978421f9f0901ce8c635970ea72fb
  • Generated: 2026-09-25

Source: SKILL.md on GitHub

Third-party checks

No alerts3d5 checks · Risk SAFE
  • Gen Agent Trust Hub3d

    The skill provides comprehensive documentation and reference material for the Vitest testing framework. It covers configuration, CLI usage, mocking, coverage, and advanced features like type testing and benchmarking. No security issues were detected; the instructions follow standard development and testing practices.

  • Socket3d

    No alerts

  • Snyk3d

    Risk: LOW · No issues

  • Runlayer7mo

    1/18 files flagged

  • ZeroLeaks5mo

    Score: 93/100 · 2 sections analyzed

Provenance

Signed by skilld at d02c484. This ties the file your Agent reads to that commit on GitHub. It does not review the instructions.

Last checked against GitHub 2 days ago.

Activeupdated 4 days ago

Capability

Other metadata
metadata
{
  "author": "Anthony Fu",
  "version": "2026.9.25",
  "source": "Generated from https://github.com/vitest-dev/vitest, scripts located at https://github.com/antfu/skills"
}

Topics

README badge

README badge for antfu/skills/vitest

What it does

Vitest is a Jest-compatible unit testing framework powered by Vite, with native ESM, TypeScript, and JSX support. Use it for writing tests with smart watch mode, mocking, fixtures, coverage reporting, and snapshot testing in projects already using Vite.

Generated from the current SKILL.md.

Frequently asked

Is Vitest a drop-in replacement for Jest?
Mostly. Vitest provides a Jest-compatible API and can run most Jest test suites without modification, but it uses Vite's transformation pipeline instead of Jest's, so some edge cases may differ.
Does Vitest require configuration?
No. It natively supports ESM, TypeScript, and JSX out of the box and shares Vite's config, transformers, and resolvers, so many projects need minimal or no additional setup.
What coverage providers does Vitest support?
Vitest includes built-in coverage via V8 or Istanbul providers.
Can I run tests in parallel?
Yes. Vitest uses multi-threaded workers for parallel test execution and supports sharding across multiple processes.
What test environments are available?
Vitest supports node, jsdom, happy-dom, and custom environments.

Generated from the current SKILL.md. These answers refresh after source changes.