API Route Testing Skill

This skill provides framework-agnostic guidance for testing HTTP API routes and endpoints across any backend framework (Express, Next.js API Routes, FastAPI, Django REST, Flask, etc.).

Core Testing Principles

1. Test Types for API Routes

Unit Tests

• Test individual route handlers in isolation
• Mock dependencies (database, external APIs)
• Fast execution (< 50ms per test)
• Focus on business logic

Integration Tests

• Test full request/response cycle

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