If you use perl, you need Perl Testing.

Starting with the very basics, Ian Langworth & chromatic guide us step by step through testing Perl and present us with the perspective of testing application and websites using Perl tests.

From Test::Simple and Test::More to Test::WWW::Mechanize and Test::Expect, they cover it all, including simple function calls, redefining core functions, simulating database connections, and a lot more. Even testing Test modules is covered.

Perl Testing is A Developer's Notebook, a recent format (and trademark) of O'Reilly, with a focus in pratical examples. The authors show us how to do things in usable labs, explain us what just happened and then present us with some alternatives to the lab exposed.

To me, it was a completely new world, an eye-opener as I was reading page after page of Perl Testing.

I said it already but, if you use Perl, you really need Perl Testing. But, if you publish to CPAN, you can't miss it.