Integration Testing (API-DB)

Overview

Integration tests should verify that real boundaries work together under realistic conditions. Prefer focused tests around meaningful cross-layer behavior instead of giant end-to-end scenarios or unit-level mocks pretending to be infrastructure.

Follow This Workflow

1. Define the integration boundary

• API to database.
• Service to repository.
• Worker to queue or persistence.
• Validation, authorization, and persistence combined at the real boundary.
• Keep the test scope narrower than E2E but broader than a unit.

2. Use real dependencies intentionally