I am trying to run a unit test for my springboot controller as:

@WebMvcTest(controllers = MyController.class)
@ExtendWith(SpringExtension.class)
public class MyControllerTest {

    @Autowired
    private MockMvc mvc;

    @MockBean
    private ValidateRequest validateRequest;

    @MockBean
    private MyService myService;

    @Test
    public void createitem_InvalidRequest() throws Exception {
        given(validateRequest.validate(any())).willThrow(new InvalidRequestException("Invalid request"));

        mvc.perform()
        ....
        ....

}

MyController has dependencies ValidateRequest, MyService which are injected at field level using @Autowired.

ValidateRequest is defined as:

@Component
public class ValidateRequest extends SomeBaseClass{
    ....
    ....
}

With this setup, I see that validateRequest is not initialized in test, and is null, thus causing NPE.

Java version is 1.8 and sprinbgoot is 2.3.3.

What am I missing here?

Edited:

junit dependencies are:

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
</dependency>
<dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <scope>test</scope>
</dependency>