public void XmlObjectUservariableReferenceTest() { XmlProgram programm = new XmlProgram() { SpriteList = new XmlSpriteList() { Sprites = new List<XmlSprite>(), }, VariableList = new XmlVariableList() { ObjectVariableList = new XmlObjectVariableList() { } } }; TextReader sr = new StringReader("<objectList>" + " <object name=\"Hintergrund\">" + " </object>" + " <object name=\"FlaPacMan\">" + " <scriptList>" + " <script type=\"BroadcastScript\">" + " <brickList>" + " <brick type=\"SetVariableBrick\">" + " <formulaList>" + " <formula category=\"VARIABLE\">" + " <type>NUMBER</type>" + " <value>1</value>" + " </formula>" + " </formulaList>" + " <userVariable>paclives</userVariable>" + " </brick>" + " <brick type=\"SetVariableBrick\">" + " <formulaList>" + " <formula category=\"VARIABLE\">" + " <type>NUMBER</type>" + " <value>0.0</value>" + " </formula>" + " </formulaList>" + " <userVariable>change anim</userVariable>" + " </brick>" + " <brick type=\"SetVariableBrick\">" + " <formulaList>" + " <formula category=\"VARIABLE\">" + " <type>NUMBER</type>" + " <value>1</value>" + " </formula>" + " </formulaList>" + " <userVariable>animframe</userVariable>" + " </brick>" + " </brickList>" + " </script>" + " </scriptList>" + " </object>" + " <object name =\"handmade referenceobject\">" + " <scriptList>" + " <script type=\"BroadcastScript\">" + " <brickList>" + " <brick type =\"ChangeVariableBrick\">" + " <formulaList>" + " <formula category=\"VARIABLE_CHANGE\">" + " <type>NUMBER</type>" + " <value>7</value>" + " </formula>" + " </formulaList>" + " <userVariable reference=\"../../../../../../object[2]/scriptList/script/brickList/brick[3]/userVariable\" />" + " </brick>" + " </brickList > " + " </script>" + " </scriptList>" + " </object>" + "</objectList>"); var objectList = XElement.Load(sr); programm.SpriteList.LoadFromXml(objectList); XmlParserTempProjectHelper.Program = programm; //change these 3 to get differnt deep references as you are specifying the "iterator" in the imaginary XML-Docucment XmlParserTempProjectHelper.currentObjectNum = 3; XmlParserTempProjectHelper.currentBrickNum = 1; XmlParserTempProjectHelper.currentVariableNum = 1; //the variable you wanna reference to from the position of the "iterator" - ! it has to exist in the above XML-snippet but you can also modify this if you know what you are doing! var userVariableRefTest = new XmlUserVariableReference(); userVariableRefTest.UserVariable = ((XmlSetVariableBrick) programm.SpriteList.Sprites[1].Scripts.Scripts[0].Bricks.Bricks[2]).UserVariable; userVariableRefTest.UserVariable.ObjectNum = 2; userVariableRefTest.UserVariable.ScriptNum = 1; userVariableRefTest.UserVariable.BrickNum = 3; userVariableRefTest.UserVariable.VariableNum = 1; String testString = userVariableRefTest.CreateXml().ToString(); //string of variable reference from xml-snippet //be in mind to adapt the deep accordingly to your changes above //if you change the refence be in mind that in the Catrobat XML language (at leats until 0.94) counting starts at 1 not at 0 and [1]'s are not shown/written var referenceXElement = objectList.Descendants(XmlConstants.UserVariable).Where(uservar => uservar.HasAttributes).First(); String referenceString = referenceXElement.ToString();//should be "<userVariable reference=\"../../../../../../object[2]/scriptList/script/brickList/brick[3]/userVariable\" />"; Assert.AreEqual(referenceString, testString, "XmlObjectUservariableReferenceTest failed at the CreateXML part"); var userVariableRefLoaded = new XmlUserVariableReference(); userVariableRefLoaded.LoadFromXml(referenceXElement); userVariableRefLoaded.UserVariable.ObjectNum = 2; userVariableRefLoaded.UserVariable.ScriptNum = 1; userVariableRefLoaded.UserVariable.BrickNum = 3; userVariableRefLoaded.UserVariable.VariableNum = 1; Assert.AreEqual(userVariableRefLoaded.UserVariable, userVariableRefTest.UserVariable, "XmlObjectUservariableReferenceTest failed at the LoadXML part"); }