Spring Boot Testing Concepts

External

• https://www.baeldung.com/spring-boot-testing
• https://spring.io/blog/2016/04/15/testing-improvements-in-spring-boot-1-4
• https://www.baeldung.com/injecting-mocks-in-spring
• https://docs.spring.io/spring-boot/docs/current/reference/html/features.html#features.testing

Internal

• Spring Boot Concepts
• Spring Framework Testing Concepts

Dependencies

Use:

dependencies {
    testImplementation('org.springframework.boot:spring-boot-starter-test')
}

This started dependency pulls everything that is needed to write JUnit tests.

Annotations

Required:

• @SpringBootTest - this is required, otherwise beans won't get injected in our tests.
• @MockBean - automatically injects Mockito mocks.

Optional:

• @WebMvcTest more research
• @RunWith(SpringRunner.class) more research
• @IntegrationTest more research
• @WebIntegrationTest more research

Spring Boot Mockito Support

Spring Boot Mockito Support

The Default Generated XyzApplicationTests

Spring Initializr creates a

@SpringBootTest
class XyzApplicationTests {
  @Test
  void contextLoads() {
  }
}

How does this work? How is this useful? Does it use name conventions?

SpringBoot Test Example

@SpringBootTest
public class MyTests {

    @Autowired
    private SomeComponent someComponentWeWantToTest;

    // ...

}

For an example of how to use Mockito mocks, see:

Spring Boot Mockito Support

Testing Logging Configuration

By default, test logging is executed by Logback.