Spent the afternoon making a servlet based application run all by itself by mocking the HttpServletRequest/Response, ServletContext etc etc. interfaces. It was also a great opportunity to use dynamic proxies in anger for the first time. I ended up with a rather nice abstract implementation of InvocationHandler that contained a Map of method names and MethodReceiver objects for the calls I cared about. Using dynamic proxies saved loads of time – I could code up canned responses to the method calls I was interested in and ignore the rest. It was kind of fun being able to instantiate a servlet inside a TestCase, call doGet() and get all the HTML dumped to System.out.

I didn’t quite reimplement EasyMock from scratch, but there’s probably some synergy to be had there…