### Question:
NominalLabelResourceFacadeImp extends CoreDBServiceFacadeImp<NominalLabel, Long> implements NominalLabelResourceFacade { @Override public NominalLabelDTO addNominalLabel(NominalLabelDTO nominalLabel) { try { NominalLabel nb = nominalLabel.toEntity(); em.persist(nb); em.flush(); em.refresh(nb); return new NominalLabelDTO(nb); } catch (Exception e) { logger.error("Error in addNominalLabel.", e); return null; } } protected  NominalLabelResourceFacadeImp(); @Override void saveNominalLabel(NominalLabelDTO nominalLabel); @Override NominalLabelDTO addNominalLabel(NominalLabelDTO nominalLabel); @Override NominalLabelDTO editNominalLabel(NominalLabelDTO nominalLabel); @Override Integer deleteNominalLabel(NominalLabelDTO nominalLabel); @Override Integer deleteNominalLabelByID(Long nominalLabelID); @Override NominalLabelDTO getNominalLabelByID(Long nominalLabelID); @Override NominalLabelDTO getNominalLabelWithAllFieldsByID(Long nominalLabelID); @Override NominalLabelDTO getNominalLabelByCode(String code); @Override NominalLabelDTO getNominalLabelWithAllFieldsByCode(String code); @Override List<NominalLabelDTO> getAllNominalLabels(); @Override Boolean isNominalLabelExists(Long nominalLabelID); @Override Boolean isNominalLabelExists(String code); @Override List<NominalLabelDTO> getNominalLabelByAttributeID(Long attributeID); @Override List<Long> getNominalLabelIdsByAttributeID(Long attributeID); @Override Long getNominalLabelCountForCollectionID(Long collectionId);  }### Answer:
@Test public void testAddNominalLabel() { assertEquals(nominalAttribute.getNominalAttributeId(), nominalLabel.getNominalAttributeDTO().getNominalAttributeId()); }