testing webservices best practices

[Mi...@wellsfargo.com]

Hi,
 
I am currently using maven to build and deploy an EAR file that contains a
collection of webservices that interact with a series of stateless session
beans.  I have followed, from what I've found on the web, a standard maven
directory structure that looks like:
 
    project
        |- common {artifact=jar}
        |- ejb(s) {artifact=jar}
        |- webservice {artifact=war}
        |- ear {artifact=ear}
 
The question is where should the webservice tests go??  Also, what type of
tests should they be (JUnit, Cactus, HttpUnit)??
 
thanks,
-mike