Opc.Ua.ServerTest.BrowseTest.VerifyReferenceTypeId C# (CSharp) Method

        private bool VerifyReferenceTypeId(Node node, BrowseDescription description, ReferenceDescription reference)
        {      
            // check if field was not requested.
            if ((description.ResultMask & (uint)BrowseResultMask.ReferenceTypeId) == 0)
            {
                if (!NodeId.IsNull(reference.ReferenceTypeId))
                {
                    Log("Returned unexpected non-null ReferenceTypeId when Browsing Node '{0}'. NodeId = {1}", node, node.NodeId);
                    return false;
                }

                return true;
            }
            
            // check for null.
            if (NodeId.IsNull(reference.ReferenceTypeId))
            {
                Log("Returned unexpected null ReferenceTypeId when Browsing Node '{0}'. NodeId = {1}", node, node.NodeId);
                return false;
            }

            // check for valid reference.
            IReferenceType referenceType = Session.NodeCache.Find(reference.ReferenceTypeId) as IReferenceType;
            
            if (NodeId.IsNull(reference.ReferenceTypeId))
            {
                Log("Returned invalid ReferenceTypeId when Browsing Node '{0}'. NodeId = {1}, ReferenceTypeId = {2}", node, node.NodeId, reference.ReferenceTypeId);
                return false;
            }
            
            // check for valid subtype.
            if (!Session.TypeTree.IsTypeOf(referenceType.NodeId, description.ReferenceTypeId))
            {                
                string expectedName = description.ReferenceTypeId.ToString();
                
                IReferenceType expectedType = Session.NodeCache.Find(description.ReferenceTypeId) as IReferenceType;

                if (expectedType != null)
                {
                    expectedName = Utils.Format("{0}", expectedType.DisplayName);
                }
            
                Log("ReferenceType {2} is not a subtype of {3} when browsing Node '{0}'. NodeId = {1}", node, node.NodeId, referenceType.DisplayName, expectedName);
                return false;
            }

            return true;
        }