@WebMvcTest for controller testing in JUnit - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

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

JUnit

@[1](MyController.class)
public class MyControllerTest {
    // test methods
}

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

AWebMvcTest

BSpringBootTest

CDataJpaTest

DRestController

Attempts:

3 left

💡 Hint

Common Mistakes

Using @SpringBootTest instead of @WebMvcTest for controller tests.

Annotating with @RestController which is for controllers, not tests.

The @WebMvcTest annotation is used to test Spring MVC controllers specifically, loading only the web layer.

2fill in blank

medium

Complete the code to inject the MockMvc object for performing HTTP requests in the test.

JUnit

@Autowired
private [1] mockMvc;

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AWebClient

BRestTemplate

CMockMvc

DTestRestTemplate

Attempts:

3 left

💡 Hint

Common Mistakes

Using RestTemplate which is for real HTTP calls, not mocks.

Using WebClient which is reactive and not typical in @WebMvcTest.

MockMvc is the class used to simulate HTTP requests in Spring MVC tests.

3fill in blank

hard

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

JUnit

mockMvc.perform(get("/api/items"))
       .andExpect([1].status().isOk());

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AMockMvcRequestBuilders

BMvcResult

CResultActions

DMockMvcResultMatchers

Attempts:

3 left

💡 Hint

Common Mistakes

Using MockMvcRequestBuilders which builds requests, not assertions.

Using MvcResult which holds the result, not matchers.

MockMvcResultMatchers provides methods to assert the response status and content.

4fill in blank

hard

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

JUnit

@[1]
private MyService myService;

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AMockBean

BSpyBean

CInjectMocks

DAutowired

Attempts:

3 left

💡 Hint

Common Mistakes

Using @Autowired to inject real beans instead of mocks.

Using @InjectMocks which is from Mockito but not for Spring context.

@MockBean creates a mock of the service and adds it to the Spring context for the test.

5fill in blank

hard

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

JUnit

mockMvc.perform(post("/api/items")
       .contentType(MediaType.[1])
       .content("{\"name\":\"item1\"}"))
       .andExpect(content().contentType(MediaType.[2]))
       .andExpect(status().[3]());

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AAPPLICATION_JSON

BAPPLICATION_XML

CisCreated

DisOk

Attempts:

3 left

💡 Hint

Common Mistakes

Using APPLICATION_XML instead of APPLICATION_JSON for JSON data.

Expecting isCreated() when the controller returns 200 OK.

Use MediaType.APPLICATION_JSON for JSON content type. The expected status is HTTP 200 OK with isOk().