Mock repository used by JPQL query while testing

I want to test CRUD Repository with related JPQL:

@Repository
public interface UserRolesRepository extends CrudRepository<UserRoles, Long> {

@Query("SELECT a.role FROM UserRoles a, UserEntity b WHERE b.username=?1 AND a.id=b.id")
public List<String> findRoleByUserName(String name);
}

My problem is to mock repository related to UserEntity. I've tried to mock methods of user repository, but them seem not to be ever called.

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = BlogCmsApplication.class)
public class UserRolesRepositoryTest {
@Autowired
UserRolesRepository userRolesRepository;
@Mock
UserRepository userRepository;

@Before
public void setUp() throws Exception {
    MockitoAnnotations.initMocks(this);

}

@Test
public void findRoleByUserName() throws Exception {
    UserEntity user = new UserEntity("user467","somepass");
    user.setId(1);
    Mockito.when(userRepository.findByUsername(user.getUsername())).thenReturn(user);
    Mockito.when(userRepository.findOne(user.getId())).thenReturn(user);
    Mockito.when(userRepository.exists(user.getId())).thenReturn(true);


    UserRoles role = new UserRoles(1,"ROLE_USER");
    userRolesRepository.save(role);

    List<String> actualRole;
    actualRole = userRolesRepository.findRoleByUserName(user.getUsername());

    List<String> expectedRole = new ArrayList<>();
    expectedRole.add(role.getRole());

    assertNotNull(actualRole);
    assertEquals(expectedRole,actualRole);

}

With @Autowired works fine but it's not the point. Assertion error is

Expected :[ROLE_USER]
Actual   :[]