@Test
public void synchronizeStudentMapping_CouldNotMap() {

    when(userMappingDaoMock.existsMappingForSapUserId(lecturerMock.getPersonalNr())).thenReturn(false);
    when(lecturerMappingByPersonalNumberMock.tryToMap(lecturerMock.getPersonalNr())).thenReturn(null);
    when(mappingByEmailMock.tryToMap(lecturerMock)).thenReturn(null);
    when(mappingByFirstNameAndLastNameMock.tryToMap(lecturerMock.getFirstName(), lecturerMock.getLastName())).thenReturn(null);
    MappingResult result = lecturerMapperTestObject.synchronizeLecturerMapping(lecturerMock);
    assertEquals("", MappingResult.COULD_NOT_MAP, result);
}