Hi, just to clarify, both testing methods I mentioned, is() and is_deeply() are from Test::More. The latter is often enough for comparing two arrays, for example, but if things get more complex then indeed you may want to move up to Test::Deep, which is much more flexible and powerful, providing cmp_deeply(), cmp_bag(), ignore() and other useful tools.

Or, you can do as I do and simply always use:

use Test::Most 'die';

# tests

done_testing;
__END__
[download]

... because Test::Most provides Test::Deep as well as several other useful libraries (and exports 'die' and loads strict and warnings).

You are right; there are a lot of testing libraries and tools (and you can make your own!). Using them is one of the most satisfying parts of Perl software development, for me.

Hope this helps!