Testing microservices is challenging. This is because, despite their independence, they are often still coupled via API calls. It’s this coupling that can lead to issues such as:

• Too much reliance on slow and brittle end-to-end testing
• False positives generated by inaccurate stubs
• No idea whether changing an API endpoint will break anything
• Difficult to reason about Microservice dependencies

This talk will introduce the consumer-driven contract testing technique, a TDD at the API level approach for Microservices. It aims to resolve all of these issues and more, leading to truly independently testable and releasable services.