Spring data repository not injecting with @Mock in test case class returns null?

Repository object not injecting in testcase class. Here is my below test class code

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classesExternalProviderMain.class)
@ActiveProfiles(ApplicationConstants.DEVELOPMENT_PROFILE)
@WebAppConfiguration
public class EmployeeServiceTest {
@InjectMocks
EmployeeService employeeService; //not injected null 
@Mock
EmployeeRepository employeeRepository;//not injected null
@Test
public void testEmployee() {
    Mockito.when(employeeRepository.findByName(Stringname)).thenReturn(getEmployee());
    List<Employee> resultedTrackbles = employeeService.getEmployeeByName("mike");
}
private List<Employee> getEmployee(){
//here is the logic to return List<Employees>
}
}

Can you please help me how to inject my "EmployeeRepository" and Do need to write any additional logic.

That's because you are running your test with SpringJUnit4ClassRunner and not with MockitoJUnitRunner.

The mocks need to be initialized with MockitoAnnotations.initMocks:

@Before
public void init() {
    MockitoAnnotations.initMocks(this);
}