unit-test-wiremock-rest-api
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
- Add dependency: WireMock in test scope (Maven/Gradle)
- Register extension:
@RegisterExtension WireMockExtensionwithdynamicPort() - Configure client: Use
wireMock.getRuntimeInfo().getHttpBaseUrl()as base URL - Stub responses:
stubFor()with request matching (URL, headers, body)
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