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vitest-best-practices

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).

.agent/skills/vitest-best-practices/SKILL.md

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# Vitest Best Practices

## When to Apply This Skill

Use this skill when you encounter any of these scenarios:

### File Patterns

- Working with `*.test.ts`, `*.spec.ts`, or similar test files
- Creating new test files for TypeScript/JavaScript modules
- Reviewing existing vitest test suites

### User Intent Keywords