Now that the WS Tester is getting more stable and feature complete, I wanted to try it against a RESTeasy web service (JAX-RS) deployed against one of our own runtimes. I simply used the steps we'd defined earlier for using the RESTeasy project example on this wiki page.
<customer> <first-name>Bill</first-name> <last-name>Burke</last-name> <street>256 Red Hat Lane</street> <city>Boston</city> <state>MA</state><zip>02115</zip> <country>USA</country> </customer>
On the Request Header tab, add "content-type=application/xml" as the lone header.
Click the Invoke button.
You won't see anything in the Response Body tab to the right, but if you go to the Response Header, you should see "[HTTP/1.1 201 Created]" as the top line in the list. You should also see the Location (http://localhost:8080/simple/rest-services/customers/# where # is the record number for the entry).