vibe-stack / rules

---
description: Testing strategy for AI developers
globs: ["**/*.test.ts", "**/*.test.tsx", "**/tests/**"]
---

# Testing Strategy

Use Vitest for unit tests, Playwright for E2E testing.

What to test (prioritized):
1. Server Actions (they're just functions — easy to test)
2. API route handlers
3. Auth flows (most critical)
4. Complex business logic and utility functions

What NOT to bother testing with unit tests:
- Simple React leaf components (visual testing is better)
- Styling logic and Tailwind classes
- Component boilerplate

Simple Server Action test example:
```typescript
import { createTodo } from '@/app/actions'
import { expect, test, describe } from 'vitest'

describe('createTodo Server Action', () => {
  test('creates todo for authenticated user', async () => {
    const formData = new FormData()
    formData.set('title', 'Test todo')
    
    const result = await createTodo(formData)
    expect(result.success).toBe(true)
  })
})
```