This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I am just learning this framework also, but actionPerform() is simply a hook into the StrutsTestCase/Cactus framework that calls you actions execution method. you need to use cactus in conjunction with strutstestcase ( I do believe) Like a say I am just learning so hope I helped.