What is contract testing in API?

In this testing, a producer takes charge of creating a contract between them and the consumer. Then the producer runs several build tests to meet the contract. If the producer passes all the test cases, then the results get stored in a common repository.

What are API tests performed with?

API testing is a type of software testing that involves testing application programming interfaces (APIs) directly and as part of integration testing to determine if they meet expectations for functionality, reliability, performance, and security. Since APIs lack a GUI, API testing is performed at the message layer.

What is contract testing?

Contract testing is a methodology for ensuring that two separate systems (such as two microservices) are compatible and are able to communicate with one other.

Why contract testing is important?

Contract tests are essential to providing assurance that integration points are working as defined. By implementing well defined contract tests, applications/ services can be decoupled and released independently. Using CDC practices often leads to more mature, well designed services.

What is CDC in Microservices?

Consumer driven contracts (CDC) are like TDD applied to the API. It’s especially important in the world of microservices. Since it’s driven by consumers, it’s much more user friendly. We will write a system using the CDC approach together with Spring Boot, Spring Cloud Contract verifier.

Are contract tests useful?

Contract-based tests can be particularly useful when trying to focus on catching defects: Within the consumer workflows. Around misunderstandings regarding endpoint configuration or payload contents. When the provider has created breaking changes on endpoints and/or payload.

Are contract tests integration tests?

Contract testing is a technique for testing an integration point by checking each application in isolation to ensure the messages it sends or receives conform to a shared understanding that is documented in a “contract”.

What is API end to end testing?

Surely, you are using a healthy mix of different tests (unit, integration, functional, …). End-to-end tests can be the final confirmation that everything looks fine. The second case is testing APIs that you don’t control. In my last projects most of the data we consumed came from APIs served by other teams.