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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.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
Trigger: Docker, docker-compose, deploy, container, volume, DOWNLOADS_DIR, PUID, PGID, update, self-hosted. spotiarr Docker setup: services, volumes, env vars, update flow.
Trigger: Zustand, store, client state, usePlayerStore, usePreferencesStore, playerUISlice, ephemeral state, persist middleware. spotiarr Zustand rules: 2 stores + player UI slice, server state stays in TanStack Query, patterns for selectors and bulk hooks.
Trigger: command, validate, PR, branch, run lint, run build, secrets. Correct pnpm commands, branch naming, PR checklist, and secrets rules for spotiarr.
Trigger: architecture, layer, placement, where does X go, new feature, repo structure. spotiarr layer rules: backend DDD-lite, frontend hooks/store/views.
Trigger: i18n, translation, i18next, language, locale, new language, translate. spotiarr frontend i18n: key conventions, useLanguageSync override, adding languages.
Trigger: SSE, server-sent events, real-time, useServerEvents, live updates, EventSource. spotiarr SSE pattern: frontend EventSource hook, backend AppEventBus, 4 event types.
SOC 職業分類に基づく
| name | vitest |
| description | 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. |
| metadata | {"author":"Anthony Fu","version":"2026.1.28","source":"Generated from https://github.com/vitest-dev/vitest, scripts located at https://github.com/antfu/skills"} |
Vitest is a next-generation testing framework powered by Vite. It provides a Jest-compatible API with native ESM, TypeScript, and JSX support out of the box. Vitest shares the same config, transformers, resolvers, and plugins with your Vite app.
Key Features:
The skill is based on Vitest 3.x, generated at 2026-01-28.
| Topic | Description | Reference |
|---|---|---|
| Configuration | Vitest and Vite config integration, defineConfig usage | core-config |
| CLI | Command line interface, commands and options | core-cli |
| Test API | test/it function, modifiers like skip, only, concurrent | core-test-api |
| Describe API | describe/suite for grouping tests and nested suites | core-describe |
| Expect API | Assertions with toBe, toEqual, matchers and asymmetric matchers | core-expect |
| Hooks | beforeEach, afterEach, beforeAll, afterAll, aroundEach | core-hooks |
| Topic | Description | Reference |
|---|---|---|
| Mocking | Mock functions, modules, timers, dates with vi utilities | features-mocking |
| Snapshots | Snapshot testing with toMatchSnapshot and inline snapshots | features-snapshots |
| Coverage | Code coverage with V8 or Istanbul providers | features-coverage |
| Test Context | Test fixtures, context.expect, test.extend for custom fixtures | features-context |
| Concurrency | Concurrent tests, parallel execution, sharding | features-concurrency |
| Filtering | Filter tests by name, file patterns, tags | features-filtering |
| Topic | Description | Reference |
|---|---|---|
| Vi Utilities | vi helper: mock, spyOn, fake timers, hoisted, waitFor | advanced-vi |
| Environments | Test environments: node, jsdom, happy-dom, custom | advanced-environments |
| Type Testing | Type-level testing with expectTypeOf and assertType | advanced-type-testing |
| Projects | Multi-project workspaces, different configs per project | advanced-projects |
