assertEquals(epInv.getRequestParamValue(new QName("String_1")).toString(), "Hello World!");
assertEquals(epInv.getRequestParamValue(new QName("foo")).toString(), "hi");
epInv.setReturnValue("test");
SOAPMessage responseMessage = (SOAPMessage)binding.bindResponseMessage(opMetaData, epInv);
stream = new ByteArrayOutputStream();
responseMessage.writeTo(stream);
in = new ByteArrayInputStream(stream.toByteArray());