Application Programming Interface Testing and Integration Questions

Designing and automating tests that exercise application programming interfaces and how they integrate with user interfaces and backend services. Topics include using interface calls for test data setup and teardown, validating request and response payloads and status codes, contract and schema validation against published interface specifications, mocking and stubbing dependent services or using service virtualization, handling authentication and authorization flows, negative testing and error handling, rate limiting and idempotency considerations, and integrating interface tests into automated pipelines to provide reliable and fast feedback.