libsbml.Model.addUnitDefinition C# (CSharp) Method

        public int addUnitDefinition(UnitDefinition ud)
        {
            int ret = libsbmlPINVOKE.Model_addUnitDefinition(swigCPtr, UnitDefinition.getCPtr(ud));
            return ret;
        }

 public void test_Model_addUnitDefinition5()
 {
     Model m = new  Model(2,2);
       UnitDefinition ud = new  UnitDefinition(2,2);
       ud.setId( "ud");
       ud.createUnit();
       UnitDefinition ud1 = new  UnitDefinition(2,2);
       ud1.setId( "ud");
       ud1.createUnit();
       int i = m.addUnitDefinition(ud);
       assertTrue( i == libsbml.LIBSBML_OPERATION_SUCCESS );
       assertTrue( m.getNumUnitDefinitions() == 1 );
       i = m.addUnitDefinition(ud1);
       assertTrue( i == libsbml.LIBSBML_DUPLICATE_OBJECT_ID );
       assertTrue( m.getNumUnitDefinitions() == 1 );
       ud = null;
       ud1 = null;
       m = null;
 }