public void testErrorMessage_02() {
   EClass eClass = createEClass();
   eClass.setName("EClassName");
   IEObjectDescription description =
       EObjectDescription.create(QualifiedName.create(eClass.getName()), eClass);
   String errorMessage =
       helper.getDuplicateNameErrorMessage(
           description, EcorePackage.Literals.ECLASS, EcorePackage.Literals.ENAMED_ELEMENT__NAME);
   assertEquals("Duplicate EClass 'EClassName'", errorMessage);
 }
 public void testErrorMessage_04() {
   EClass eClass = createEClass();
   eClass.setName("EClassName");
   EAttribute attribute = EcoreFactory.eINSTANCE.createEAttribute();
   attribute.setName("Attribute");
   eClass.getEStructuralFeatures().add(attribute);
   IEObjectDescription description =
       EObjectDescription.create(QualifiedName.create(attribute.getName()), attribute);
   String errorMessage =
       helper.getDuplicateNameErrorMessage(
           description,
           EcorePackage.Literals.EATTRIBUTE,
           EcorePackage.Literals.ENAMED_ELEMENT__NAME);
   assertEquals("Duplicate EAttribute 'Attribute' in EClass 'EClassName'", errorMessage);
 }