Quality Control & Assurance Flashcards

Which Spring Test annotation loads only a subset of the application context for testing the web layer without starting a full server?

Answer: @WebMvcTest

@WebMvcTest loads only MVC components like controllers, filters, and WebMvcConfigurer beans, not the full context.

In Spring Boot, what does the @DataJpaTest annotation do by default regarding the datasource?

Answer: Configures an in-memory embedded database

@DataJpaTest replaces the configured datasource with an embedded in-memory database by default for isolated repository testing.

Which assertion library is commonly used with Spring Boot Test to provide more readable assertions like assertThat(value).isEqualTo(expected)?

Answer: AssertJ

AssertJ provides a fluent API with assertThat() that Spring Boot Test auto-imports via spring-boot-starter-test.

What is the purpose of @MockBean in a Spring Boot test?

Answer: Creates a real Spring bean backed by a mock object and adds it to the ApplicationContext

@MockBean creates a Mockito mock and registers it as a Spring bean, replacing any existing bean of the same type in the context.

When using MockMvc, which method is used to simulate an HTTP GET request to a controller endpoint?

Answer: mockMvc.perform(get("/path"))

MockMvc.perform() accepts a RequestBuilder such as MockMvcRequestBuilders.get() to simulate HTTP requests in tests.

Which Spring annotation can be applied to a test class to replace beans with Spy objects that wrap real implementations?

Answer: @SpyBean

@SpyBean wraps an existing Spring bean with a Mockito spy, allowing partial mocking while retaining real method behavior.

In a Spring Boot integration test, what does setting webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT do?

Answer: Starts an embedded server on a randomly chosen available port

RANDOM_PORT starts a real embedded web server on a random available port, preventing port conflicts during parallel test execution.