Vitest Testing Skill Core Patterns Basic Test Mocking (vi instead of jest) In-Source Testing Snapshot Testing React Component Testing Anti-Patterns | Bad | Good | Why | |-----|------|-----| | | | Vitest uses | | | | Different namespace | | No type safety | TypeScript + strict | Vitest is TS-first | Quick Reference | Task | Command | |------|---------| | Run once | | | Watch | (default) | | UI | | | Coverage | | | Specific file | | | Filter | | vitest.config.ts Deep Patterns → | § | Section | Lines | |---|---------|-------| | 1 | Production Configuration | Config, workspace, setup file | | 2 |…