@Test
public void synchronizeStudentMapping_MappingByMartikelNumber() {

    when(userMappingDaoMock.existsMappingForSapUserId(lecturerMock.getPersonalNr())).thenReturn(false);
    when(lecturerMappingByPersonalNumberMock.tryToMap(lecturerMock.getPersonalNr())).thenReturn(identityMock);
    MappingResult result = lecturerMapperTestObject.synchronizeLecturerMapping(lecturerMock);
    assertEquals("", MappingResult.NEW_MAPPING_BY_PERSONAL_NR, result);
}