in reply to tests for web apps
For the modules you want Test::More and friends. A good introduction is Test::Tutorial.
For testing the web application itself WWW::Mechanize is very useful, and people have said good things about HTTP::WebTest. You may also find Test::HTML::Content and Test::HTML::Lint of interest.
On perlmonks try:
Hope this helps.
My fellow monks
Can't tell (I'm NSA/FBI/HS/...)
Others (explain your deviation)
Results (148 votes). Check out past polls.