message.put(JbiInInterceptor.OPERATION_MEP, JbiConstants.IN_ONLY);
message.put(MessageExchangeFactory.class, new MockExchangeFactory());
message.setContent(Source.class, new StreamSource(new StringReader("<hello/>")));
message.getTransportHeaders().put("Content-Type", "text/xml");
interceptor.handleMessage(message);
MessageExchange me = message.getContent(MessageExchange.class);
assertNotNull(me);
assertTrue(me instanceof InOnly);
NormalizedMessage nm = me.getMessage("in");