# TESTS — F-001 Scaffold modular monolith skeleton

## Unit / integration (Vitest)
- `src/modules/health/tests/health.test.ts`: module-scoped; registers the module public API on a bare Fastify instance; `GET /health` → 200 and `{"status":"ok"}`.
- `src/app/tests/build-app.test.ts`: composition root; health wired through `buildApp()`; unknown route → 404 JSON envelope without stack leak.
- `scripts/tests/boundary-checker.test.ts`: run `check-module-boundaries.mjs` against fixture trees:
  - fixture `ok` (imports inside own module + shared) → exit 0
  - fixture `cross-module-internal` (imports another module's `domain/`) → exit 1
  - fixture `deep-from-app` (app imports `modules/x/api/...` directly) → exit 1

## Toolchain checks (manual/CI commands)
- `npm run build` exits 0
- `npm run typecheck` exits 0
- `npm run lint` exits 0
- `npm run lint:boundaries` exits 0 on clean tree
- `npm test` exits 0

## Acceptance traceability
| Criterion | Evidence |
|---|---|
| install/build/lint/typecheck/test green | command outputs in implementer.md |
| GET /health 200 ok | health.test.ts + build-app.test.ts |
| src/{modules,shared,infrastructure,app} exist | tree listing in implementer.md |
| boundary violation fails lint | boundary-checker.test.ts fixtures |
| verify.sh green | qa.json evidence |