What kind of assertions can be made with REST Assured in tests?

• A. Only response times.
• B. JSON values, status codes, headers, and response times.
• C. HTTP methods only.
• D. Response formats exclusively.

Answer: (B)

REST Assured provides a comprehensive framework for making various types of assertions in tests, which is reflected in the correct answer. It allows testers to validate not just the basic attributes of an HTTP response but a wide range of components, ensuring thorough testing of RESTful services.

The capability to assert on JSON values means that testers can check the contents of the response body against expected values, which is crucial when dealing with APIs that return structured data. Verifying status codes enables you to determine if the response indicates a successful, client, or server error, providing insight into the API's behavior under various conditions.

Additionally, REST Assured allows for checking headers, which can include important metadata about the response, such as content type or caching policies. Verifying response times is also significant, as it can indicate the performance of the API under test, ensuring it meets performance benchmarks.

The other options are limited in scope. They either focus on a single aspect of the response (like response times or HTTP methods) or fail to encompass the breadth of assertions that REST Assured is capable of handling. Therefore, the correct answer accurately reflects the robust capabilities of REST Assured in testing RESTful APIs.