Spring Boot Mockito Support

External

• https://www.baeldung.com/injecting-mocks-in-spring
• https://spring.io/blog/2016/04/15/testing-improvements-in-spring-boot-1-4#mocking-and-spying

Internal

• Spring Boot Testing Concepts

Overview

@MockBean

Mocks will be automatically reset across tests.

Dependencies

dependencies {
  ...
  testImplementation 'org.springframework.boot:spring-boot-starter-test'
  testImplementation 'org.mockito:mockito-core:3.12.4'
}

Example

@RunWith(SpringRunner.class)
@SpringBootTest
public class SomeTest {

    @Autowired
    private TestRestTemplate restTemplate;

    @MockBean
    private SomeService someService;

    @Before
    public void setup() {

        // this stubs behavior
        given(someService.getSomething("blah")).willReturn(new Something("blah"));
    }

    @Test
    public void test() {

        restTemplate.getForEntity("/{username}/something, String.class, "blue");
    }
}