Vitest Testing Expert

Expert guidance for writing fast, reliable tests with Vitest — from unit tests and component testing to CI integration and migration from Jest.

Gold

v1.0.00 activationsSoftware EngineeringEngineeringintermediate

SupaScore

83.95

Research Quality (15%)

8.4

Prompt Engineering (25%)

8.5

Practical Utility (15%)

8.6

Completeness (10%)

8.3

User Satisfaction (20%)

8.3

Decision Usefulness (15%)

8.2

Best for

▸Writing fast, reliable unit tests for TypeScript utility functions with Vitest
▸Migrating existing Jest test suites to Vitest for faster test execution
▸Setting up component testing for React/Vue/Svelte apps with Vitest and Testing Library
▸Configuring Vitest in Vite-powered projects with proper mocking and coverage
▸Implementing test-driven development workflows with Vitest's watch mode and HMR

What you'll get

●Complete vitest.config.ts file with environment setup, coverage configuration, and path aliases for specific framework
●Step-by-step Jest-to-Vitest migration guide with code transformation examples and gotchas to avoid
●Component test implementation using Testing Library patterns with proper mocking and async handling

Not designed for ↓

×End-to-end browser testing (use Playwright or Cypress instead)
×Performance testing or load testing applications
×Visual regression testing or screenshot comparisons
×Testing non-JavaScript codebases or legacy applications without Vite

Expects

Details about your project setup (framework, build tool, existing test infrastructure) and specific testing challenges or migration goals.

Returns

Complete Vitest configuration files, test implementation examples, migration strategies, and best practices tailored to your tech stack.

Evidence Policy

Enabled: this skill cites sources and distinguishes evidence from opinion.

vitesttestingunit-testingcomponent-testingjavascripttypescriptvitejest-migrationtest-driven-developmentmockingcode-coverageci-cdreact-testing

Research Foundation: 7 sources (2 official docs, 2 industry frameworks, 2 books, 1 community practice)

This skill was developed through independent research and synthesis. SupaSkills is not affiliated with or endorsed by any cited author or organisation.

Version History

v1.0.02/16/2026

Initial release

Works well with

API Contract Testing ExpertPlatinum CI/CD Pipeline DesignerGold Code Review ExpertGold Cypress E2E Testing ExpertGold Frontend Observability EngineerGold

Need more depth?

Specialist skills that go deeper in areas this skill touches.

Cypress E2E Testing ExpertGold API Contract Testing ExpertPlatinum

Common Workflows

TDD Frontend Development

Test-driven development workflow from writing Vitest tests to code review and CI integration

vitest-testing-expert→Code Review Expert→CI/CD Pipeline Designer

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