What type of testing is REST Assured primarily focused on?

• A. Unit testing
• B. Integration testing
• C. Functional testing
• D. Performance testing

Answer: (C)

REST Assured is primarily focused on functional testing. This framework is designed specifically to validate the functionality of RESTful web services by allowing testers to create and execute HTTP requests and assert the expected outcomes. The primary goal of functional testing is to ensure that the application's endpoints behave as specified in the requirements, returning the correct data and status codes in response to given requests.

Functional testing with REST Assured involves verifying aspects such as the correctness of API responses, the validation of response schemas, and ensuring that various HTTP methods (GET, POST, PUT, DELETE, etc.) perform as intended. The ability to write clean, readable tests that directly correspond to the API's specifications makes REST Assured an excellent tool for quality assurance within the context of API functionality.

Other types of testing, such as unit testing or performance testing, focus on different aspects of software validation. Unit testing is primarily concerned with testing individual components or functions in isolation, whereas performance testing evaluates how the API performs under various load conditions. Integration testing covers the interaction between various components of a system but does not specifically hone in on the functional behavior of RESTful APIs like REST Assured does.