Unit Testing REST APIs with WireMock

Overview

Patterns for testing external REST API integrations with WireMock: stubbing responses, verifying requests, error scenarios, and fast tests without network dependencies.

When to Use

• Testing services calling external REST APIs
• Stubbing HTTP responses for predictable test behavior
• Testing error scenarios (timeouts, 5xx errors, malformed responses)
• Verifying request details (headers, query params, request body)

Instructions