Test payload in SAP PI 7.31 Single Stack

Hi experts,

     I want to test some payload as we can do in the RWB in SAP PI systems with double stack, using RWB -> Component Monitoring -> Display -> Adapter Engine -> Test Message.

    But in JAVA single stack there is not RWB, I read somewhere that we can trigger this test changing the Adapter X to a Sender SOAP channel and fire it from the webservice navigation, but this don have to much sense for me because i think its just to test a WebService as you can do it with a SOAPUI or any other program.

Is it possible in that way??

Is there any other possibility to test the whole interfaces?

Thanks in advance

Regards!