This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
To test a web application, you can use JWebUnit or Selenium. The former is pure Java code to write tests, but doesn't execute in a real browser. There are a few ways to write Selenium tests - one is Java - and it does run in a real browser