If you're testing already-written code, I'd do it top-down, testing overall results first, then working to more granular levels. If you're writing new code, I'd do it bottom-up, module-by-module, function-by-function.

Here are some posts that I've bookmarked that you might find useful:

-xdg

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In reply to Re: RFC: Perl Testing -- How to Introduce to a team by xdg
in thread RFC: Perl Testing -- How to Introduce to a team by NovMonk

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