Low Flying Pelican Low Flying Pelican - 1 year ago 88
C# Question

Biztalk Map Unit Testing Exception

I am trying to unit test a map with following code,

protected string Map(TransformBase map, string xml)
StringWriter str = new StringWriter();
XmlTextWriter writer = new XmlTextWriter(str);

map.Transform.Transform(new XPathDocument(new StringReader(xml)), new XsltArgumentList(), writer);

return str.ToString();

And it's invoked as follows,

public void Map_Test()
var result = Map(new TestMap(),File.ReadAllText(_dataDir.GetFiles("TestRequest.xml")[0].FullName));

This works fine for most of the maps, however if I uses a function from an external assembly, this does not works and fails with the error

Result Message: System.Xml.Xsl.XslTransformException : Cannot find a script or an extension object associated with namespace 'http://schemas.microsoft.com/BizTalk/2003/ScriptNS0'.

Result StackTrace:
at System.Xml.Xsl.Runtime.XmlQueryContext.InvokeXsltLateBoundFunction(String name, String namespaceUri, IList`1[] args)
at <xsl:template match="/workOrderRequest">(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime, XPathNavigator {urn:schemas-microsoft-com:xslt-debug}current)
at <xsl:template match="/">(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime, XPathNavigator {urn:schemas-microsoft-com:xslt-debug}current)
at Root(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at Execute(XmlQueryRuntime {urn:schemas-microsoft-com:xslt-debug}runtime)
at System.Xml.Xsl.XmlILCommand.Execute(Object defaultDocument, XmlResolver dataSources, XsltArgumentList argumentList, XmlSequenceWriter results)
at System.Xml.Xsl.XmlILCommand.Execute(Object defaultDocument, XmlResolver dataSources, XsltArgumentList argumentList, XmlWriter writer)
at System.Xml.Xsl.XslCompiledTransform.Transform(XmlReader input, XsltArgumentList arguments, XmlWriter results)

Answer Source

Finally, I have managed to do this with following code (BT 2013 R2), The method Map do the actual mapping and returns the result xml,


map -> new object of the map type instance
xml -> source xml content
extObjects -> *_extxml.xml file content generated when executing validate instance on the map


        protected string Map(TransformBase map, string xml, string extObjects = null)
            string result = string.Empty;
            XslCompiledTransform transform = new XslCompiledTransform();
            XsltSettings setting = new XsltSettings(false, true);
            transform.Load(XmlReader.Create(new StringReader(map.XmlContent)), setting, new XmlUrlResolver());

            using (StringWriter writer = new StringWriter())
                transform.Transform(XmlReader.Create(new StringReader(xml)),
                GetExtensionObjects(extObjects), XmlWriter.Create(writer));
                result = writer.ToString();

            return result;

        protected XsltArgumentList GetExtensionObjects(string extObjects)
            XsltArgumentList arguments = new XsltArgumentList();
            if (extObjects == null)
                return arguments;

            XDocument extObjectsXDoc = XDocument.Parse(extObjects);
            foreach (XElement node in extObjectsXDoc.Descendants("ExtensionObject"))
                string assembly_qualified_name = String.Format("{0}, {1}", node.Attribute("ClassName").Value, node.Attribute("AssemblyName").Value);
                object extension_object = Activator.CreateInstance(Type.GetType(assembly_qualified_name));
                arguments.AddExtensionObject(node.Attribute("Namespace").Value, extension_object);
            return arguments;

Sample usage

    public void Map_Test()
        var result = Map(new A_To_B()
            , File.ReadAllText("A.xml")
            , File.ReadAllText("A_To_B_extxml.xml"));
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