If you are unfamiliar with the idea, "code-coverage testing" is about
writing unit tests, then running them with Devel::Cover
and viewing the output.
The summary generally will look something like this:
From this screen you can drill down deeper to view exactly which lines of code were executed,
which were not executed, and so on.
The detail for a single file will look something like this:
As you can see from this example, I need to write more tests if I am to achieve 100% coverage for this file.
This article will walk you through the basics of testing your Apache2::ASP web application.