API Test Automation

Overview

Automate comprehensive API endpoint testing for REST and GraphQL APIs including request generation, response validation, schema compliance, authentication flows, and error handling. Supports Supertest (Node.js), REST-assured (Java), httpx/pytest (Python), Postman/Newman collections, and Pact for consumer-driven contract testing.

Prerequisites

• API testing library installed (Supertest, REST-assured, httpx, or Postman/Newman)
• API specification file (OpenAPI/Swagger YAML/JSON or GraphQL SDL)
• Target API running in a test environment with seeded data
• Authentication credentials or API keys for protected endpoints
• JSON Schema validator (Ajv, jsonschema, or built-in framework assertions)

Instructions

1. Read the API specification and extract all endpoints:
   • Parse OpenAPI spec to catalog every path, HTTP method, request schema, and response schema.
   • For GraphQL APIs, introspect the schema to list queries, mutations, and subscriptions.
   • Document authentication requirements per endpoint (API key, Bearer token, OAuth, none).