As many of you know, being able to do some simple integration/developer testing is invaluable in developing Web Services - WebSocket is no exception. You can use rich GUI based interfaces like soapUI to do this for SOAP and REST (there's also the compact but excellent rest-client UI dedicated to REST). Because it's so new, there aren't many good clients to test WebSocket endpoints with quite yet. Fortunately, Tyrus 1.1 comes with a pretty handy command line client that you can use for testing (it of course has other uses too such as monitoring). Pavel Bucek briefly describes the client here.
Do you know of any other/better options for WebSocket testing? Better yet, you could write a Java based WebSocket client UI yourself and share it with the community :-).