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Found 203 Skills
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.
Use when writing unit/integration tests for Vite projects - provides Vitest configuration, test APIs, mocking patterns, and coverage setup
Vitest 4+ testing with Vite. Use when configuring vitest.config.ts, writing unit/integration/browser tests, implementing mocks with vi.fn/vi.spyOn/vi.mock, setting up V8 or Istanbul coverage, or migrating from Jest or older Vitest workspace setups. Triggers on vitest, vitest.config.ts, vi.mock, browser mode, vitest/browser, projects, setupFiles, and toMatchScreenshot.
Use when configuring, writing, debugging, running, or migrating Vitest tests in JavaScript/TypeScript projects, including Vite, Vue, Nuxt, React, Next.js, Node libraries, workspaces, coverage, mocks, snapshots, flaky tests, and Jest migration.
Modern TypeScript/JavaScript testing with Vitest. Fast unit and integration tests, native ESM support, Vite-powered HMR, and comprehensive mocking. Use for testing TS/JS projects.
Use when vitest performance optimization including fast execution, watch mode, and parallelization strategies.
Vitest Test Creator - Auto-activating skill for Test Automation. Triggers on: vitest test creator, vitest test creator Part of the Test Automation skill category.
Comprehensive vitest testing patterns covering test structure, AAA pattern, parameterized tests, assertions, mocking, test doubles, error handling, async testing, and performance optimization. Use when writing, reviewing, or refactoring vitest tests, or when user mentions vitest, testing, TDD, test coverage, mocking, assertions, or test files (*.test.ts, *.spec.ts).
Set up Vitest testing environment for Next.js projects
Vitest testing framework: Vite-powered tests, Jest-compatible API, mocking, snapshots, coverage, browser mode, and TypeScript support.
Vitest test runner - configuration, assertions, mocking (vi.fn, vi.mock, vi.spyOn), fake timers, snapshot testing, coverage, workspace projects
Vitest testing framework patterns for test setup, async testing, mocking with vi.*, snapshots, and test performance (formerly test-vitest). This skill should be used when writing or debugging Vitest tests. This skill does NOT cover TDD methodology (use test-tdd skill), API mocking with MSW (use test-msw skill), or Jest-specific APIs.