Spring Boot Test cannot resolve repository dependency

I have one UserRepository which is a CRUD repository as shown:

@Repository
public interface UserRepository extends CrudRepository<User, Long> {

}

one UserController like this:

@RestController
@RequestMapping("/api")
public class UserController {

    @Autowired
    private UserRepository repository;
    @Autowired
    private UserResourceAssembler assembler;

and one WebMvcTest class to test my UserController:

@RunWith(SpringRunner.class)
@WebMvcTest(UserController.class)
public class UserControllerTest {

  @Autowired
  private MockMvc mvc;

  @Test
  public void getAllEmployeesAPI() throws Exception
  {
    mvc.perform( MockMvcRequestBuilders
        .get("/api/users")
        .accept(MediaType.APPLICATION_JSON))
        .andDo(print())
        .andExpect(status().isOk());
  }

}

When I run the server everything is fine. However I get this error when I run maven-test:

java.lang.IllegalStateException: Failed to load ApplicationContext Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userController': Unsatisfied dependency expressed through field 'repository'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': Cannot create inner bean '(inner bean)#7ba1cdbe' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#7ba1cdbe': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': Cannot create inner bean '(inner bean)#7ba1cdbe' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#7ba1cdbe': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#7ba1cdbe': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' available