assertIsInstanceOf(String.class, request);
receivedMessageStringApplyingXPath = XPathBuilder.xpath("//*[name()='arg0']/text()").evaluate(context, request, String.class);
//build some dummy response
XmlConverter converter = new XmlConverter();
Document outDocument = converter.toDOMDocument(ECHO_RESPONSE);
List<Source> outElements = new ArrayList<Source>();
outElements.add(new DOMSource(outDocument.getDocumentElement()));
// set the payload header with null
CxfPayload<SoapHeader> responsePayload = new CxfPayload<SoapHeader>(null, outElements, null);
exchange.getOut().setBody(responsePayload);