Backend Testing

Backend testing should prove behavior at the cheapest layer that still makes the user-visible contract observable. Keep this entrypoint compact, then load the support files when framework boilerplate or debugging detail is needed.

When to use this skill

• Add or repair unit tests for backend business logic
• Add integration tests for REST, GraphQL, queue, or database-backed services
• Verify authentication, authorization, validation, and state changes
• Improve coverage around regressions, edge cases, or flaky suites
• Choose between Jest, Pytest, Supertest, FastAPI TestClient, or equivalent backend tooling

Do not use this skill for browser-first UI journeys or visual regression work.

Instructions

Step 1: Triage the test surface first