@SpringBootTest for integration tests - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to annotate a test class for Spring Boot integration testing.

Spring Boot

@[1]
public class MyServiceIntegrationTest {
    // test methods here
}

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AComponentScan

BConfiguration

CEnableAutoConfiguration

DSpringBootTest

Attempts:

3 left

💡 Hint

Common Mistakes

Using @ComponentScan instead of @SpringBootTest

Forgetting to annotate the test class

Using @Configuration which is for config classes, not tests

The @SpringBootTest annotation tells Spring Boot to look for a main configuration class and start the full application context for integration tests.

2fill in blank

medium

Complete the code to inject a service bean into the test class.

Spring Boot

@SpringBootTest
public class MyServiceIntegrationTest {

    @[1]
    private MyService myService;

    // test methods
}

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AInjectMocks

BAutowired

CResource

DMockBean

Attempts:

3 left

💡 Hint

Common Mistakes

Using @MockBean when you want the real bean

Using @InjectMocks which is from Mockito, not Spring

Forgetting to annotate the field

The @Autowired annotation tells Spring to inject the bean from the application context into the test class.

3fill in blank

hard

Fix the error in the test method to ensure the application context loads correctly.

Spring Boot

@SpringBootTest
public class MyServiceIntegrationTest {

    @Autowired
    private MyService myService;

    @Test
    public void contextLoads() {
        [1]
    }
}

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Afail("Not implemented")

BassertTrue(false)

CassertNotNull(myService)

DSystem.out.println("Test")

Attempts:

3 left

💡 Hint

Common Mistakes

Leaving the test empty

Using fail() which always fails the test

Printing output instead of asserting

The contextLoads test should verify that the service bean is injected and not null, confirming the context started properly.

4fill in blank

hard

Fill both blanks to configure the test to run with a random port and inject the port number.

Spring Boot

@SpringBootTest(webEnvironment = [1])
public class WebIntegrationTest {

    @Value("${local.server.port}")
    private int [2];

    // test methods
}

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ARANDOM_PORT

BDEFINED_PORT

Cport

DserverPort

Attempts:

3 left

💡 Hint

Common Mistakes

Using DEFINED_PORT which uses default port 8080

Injecting port into a field named 'port' but referencing differently

Not setting webEnvironment at all

Using webEnvironment = RANDOM_PORT starts the server on a random port. The port is injected into the serverPort field using @Value.

5fill in blank

hard

Fill all three blanks to create a test that mocks a bean and verifies it was called.

Spring Boot

@SpringBootTest
public class ServiceMockTest {

    @MockBean
    private MyRepository [1];

    @Autowired
    private MyService [2];

    @Test
    public void testServiceCall() {
        [2].performAction();
        verify([1]).save(any());
    }
}

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AmyRepository

BmyService

Crepository

Dservice

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names inconsistently

Not mocking the repository bean

Not verifying the mock interaction

The @MockBean creates a mock of MyRepository named myRepository. The service myService is autowired. The test calls myService.performAction() and verifies myRepository.save() was called.