TestRestTemplate for API testing in JUnit - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is TestRestTemplate used for in API testing?

TestRestTemplate is a Spring Boot utility that helps test RESTful APIs by sending HTTP requests and receiving responses in integration tests.

beginner

How do you send a GET request using TestRestTemplate?

You use the getForEntity(url, responseType.class) method to send a GET request and receive a response entity.

beginner

What does the ResponseEntity object contain after a TestRestTemplate call?

It contains the HTTP status code, headers, and the body of the response from the API.

intermediate

Why is TestRestTemplate preferred over RestTemplate in Spring Boot tests?

TestRestTemplate is designed for integration testing with Spring Boot and automatically integrates with the test context and server port.

beginner

How can you verify the response status code in a TestRestTemplate test?

Use assertEquals(HttpStatus.OK, response.getStatusCode()) to check if the response status is 200 OK.

Which method of TestRestTemplate sends a POST request?

A getForEntity()

B postForEntity()

C exchange()

D delete()

postForEntity() sends a POST request and returns the response entity.

What does ResponseEntity.getBody() return?

A Response content/body

B HTTP status code

C HTTP headers

D Request URL

getBody() returns the content or body of the HTTP response.

Which annotation is commonly used to inject TestRestTemplate in Spring Boot tests?

A @Service

B @Mock

C @InjectMocks

D @Autowired

@Autowired injects TestRestTemplate bean into the test class.

What HTTP status code does HttpStatus.OK represent?

A 200

B 500

C 302

D 404

HttpStatus.OK corresponds to the 200 status code meaning success.

Which TestRestTemplate method allows sending any HTTP method with full control?

A getForObject()

B postForObject()

C exchange()

D put()

exchange() method supports all HTTP methods and custom headers.

Explain how TestRestTemplate helps in testing REST APIs in Spring Boot.

Think about how you test a web service by calling its URLs and checking responses.

Describe how to verify the HTTP response status and body using TestRestTemplate in a JUnit test.

Focus on the methods to send requests and how to check results.