Best ways to unit test servlet MVC-1 oriented code

[Berlin Brown]

I am working with a large application that uses older 'Servlet'
oriented style of development. Basically, everything piece is a
servlet or connected to some kind of filter.

We could rewrite so that all the 'request.getParameter' and other
servlet calls are far from the actual business logic but it isnt and I
can't change it.

I tried junit cactus but I have redirects (302? 303) responses and
cactus didnt like that. Actually httpunit didnt like redirects.

I was going to try httpunit, but (see above) httpunit doesnt like
redirects.

Anybody have any ideas?