# Testing Conventions

## Backend Tests
- Real DB + real Redis. No mocks. conftest.py has shared fixtures.
- Location: cofee_backend/tests/integration/<module>.py
- Naming: test_<action>_<scenario> (e.g., test_create_project_without_name)
- Run: cd cofee_backend && uv run pytest
- Single test: uv run pytest -k "test_name"
- API fuzzing: cd cofee_backend && uv run --group tools schemathesis run http://localhost:8000/api/schema/ --checks all

## Frontend E2E Tests
- Playwright with data-testid selectors on every interactive element
- Location: cofee_frontend/tests/
- Run: cd cofee_frontend && bun run test:e2e
- Every component root element must have data-testid

## General
- Never mock the database — use real test DB
- Tests must be deterministic — no Date.now(), no Math.random()
- Test error paths, not just happy paths