Integration Testing for APIs, Microservices and Event-Driven Systems

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Modern applications rarely run as one tightly connected system. They depend on APIs, databases, microservices, message queues and third-party services. That makes integration testing more important because many failures happen between components rather than inside them. A practical integration testing guide should therefore cover how these modern systems communicate, fail and recover. API integration testing checks whether connected services exchange the right data and handle responses correctly.

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