transformer.initialise();
MuleMessage message = new DefaultMuleMessage(xml, muleContext);
message.setOutboundProperty("myproperty", param);
// do transformation
String transformerResult = (String) transformer.transform(message);
// remove doc type and CRLFs
transformerResult = transformerResult.substring(transformerResult.indexOf("?>") + 2);
assertTrue(transformerResult.indexOf(expectedTransformedxml) > -1);