---
description: Backend Vitest + Fastify inject
globs: apps/api/**/*,packages/db/**/*,packages/shared/**/*
alwaysApply: false
---

# Backend Testing

Vitest + `app.inject()` (встроено в Fastify).

## Требования

- Каждый route plugin → минимум 1 integration test
- Sync/DNS → parity fixtures
- `:memory:` SQLite для unit; file DB для integration
- `beforeEach` — fresh schema migrate

## Паттерн

```ts
const app = await buildApp({ db: testDb })
const res = await app.inject({ method: 'GET', url: '/health' })
expect(res.statusCode).toBe(200)
```

См. [`vitest-best-practices.mdc`](vitest-best-practices.mdc).