public void UT_hasChanges() {
string _testid = DateTime.Now.Ticks.ToString();
bool _constraint;
long _iduser;
DO_User _user = new DO_User();
_user.Connection.Open();
_user.Connection.Transaction.Begin();
Assert.IsFalse(_user.Fields.hasChanges, "unexpected changes, object just instantiated and no changes have been made");
_user.Fields.Login = _testid;
_user.Fields.Password = _testid;
Assert.IsTrue(_user.Fields.hasChanges, "expected changes, changes have been made over object");
_iduser = _user.insObject(true, out _constraint);
Assert.IsFalse(_user.Fields.hasChanges, "unexpected changes, object state commited (insert) over data base");
_user.Fields.Login = _testid;
_user.Fields.Password = _testid;
Assert.IsFalse(_user.Fields.hasChanges, "unexpected changes, no real changes have been made");
_user.Fields.Password = string.Empty;
Assert.IsTrue(_user.Fields.hasChanges, "expected changes, real changes have been made");
_user.updObject(false, out _constraint);
Assert.IsFalse(_user.Fields.hasChanges, "unexpected changes, object state commited (update) over data base");
_user.clrObject();
Assert.IsTrue(_user.Fields.hasChanges, "expected changes, object state cleared");
_user.getObject_byLogin(_testid);
Assert.IsFalse(_user.Fields.hasChanges, "unexpected changes, object state sinchronized (select) with data base");
_user.delObject();
Assert.IsTrue(_user.Fields.hasChanges, "expected changes, object erased (delete on data base)");
_user.Connection.Transaction.Rollback();
_user.Connection.Transaction.Terminate();
_user.Connection.Close();
_user.Dispose(); _user = null;
}