Hi inder,
Through runtime workbench you can not send messages in single stack.
If your sender system is not ready to send the messages then go for testing through soapui or wsnavigator. This is when sender system is building the application and make sure that your objects work fine. This is just working around time being.
If your sender system jms is ready to send the message then go for end to end testing directly.
Regards,
Muniyappan.