@WebMvcTest for controller testing in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to annotate the test class for Spring MVC controller testing.

Spring Boot

@[1](UserController.class)
public class UserControllerTest {
    // test methods
}

Drag options to blanks, or click blank then click option'

ASpringBootTest

BRestController

CDataJpaTest

DWebMvcTest

Attempts:

3 left

💡 Hint

Common Mistakes

Using @SpringBootTest instead of @WebMvcTest for controller tests

Forgetting to specify the controller class in the annotation

The @WebMvcTest annotation is used to test Spring MVC controllers specifically.

2fill in blank

medium

Complete the code to inject the MockMvc object for testing HTTP requests.

Spring Boot

@Autowired
private [1] mockMvc;

Drag options to blanks, or click blank then click option'

ARestTemplate

BWebClient

CMockMvc

DTestRestTemplate

Attempts:

3 left

💡 Hint

Common Mistakes

Using RestTemplate which requires a running server

Not injecting MockMvc and trying to test controllers directly

MockMvc is used to perform HTTP requests in Spring MVC tests.

3fill in blank

hard

Fix the error in the test method to perform a GET request and expect status 200.

Spring Boot

mockMvc.perform(get("/users"))
       .andExpect([1].isOk());

Drag options to blanks, or click blank then click option'

Astatus

Bresult

Crequest

Dresponse

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect method names like result or request instead of status

Not chaining the andExpect call properly

The status() method is used to check the HTTP status in MockMvc tests.

4fill in blank

hard

Fill both blanks to mock a service bean and inject it into the test.

Spring Boot

@[1]
private UserService [2];

Drag options to blanks, or click blank then click option'

AMockBean

BAutowired

CuserService

Dservice

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Autowired instead of @MockBean for mocking

Using generic variable names like service without context

@MockBean creates a mock of the service bean, and userService is the variable name injected.

5fill in blank

hard

Fill all three blanks to perform a POST request with JSON content and expect a created status.

Spring Boot

mockMvc.perform(post("/users")
       .contentType([1])
       .content([2]))
       .andExpect(status().[3]());

Drag options to blanks, or click blank then click option'

AMediaType.APPLICATION_JSON

B"{\"name\":\"John\"}"

CisCreated

DMediaType.TEXT_PLAIN

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong media type like TEXT_PLAIN

Not escaping JSON string properly

Expecting wrong status like isOk instead of isCreated

Use MediaType.APPLICATION_JSON for JSON content type, provide JSON string as content, and expect HTTP 201 with isCreated().