Pls. give as much details and examples about testing applications servers mail me at firstname.lastname@example.org
Testing Applications/Testing App Servers itself ? Well, for testing EJB applications, try ejbtest.com. But, for a real testing on the App servers with the load, fail-over, throughput, response time.... kind of things there are tools (testing tools) which make life easier.
Try SuperStress of Super from www.acelet.com
It is based on PeekPoke technology. It is Swing tool.
You can use your mouse to build a test case. Then
configure the test. Very simple and very powerful.