Internal Program Version: Test::Differences  0.720.0.5.42.0

When the code you're testing returns multiple lines, records or data
structures and they're just plain wrong, an equivalent to the Unix 'diff'
utility may be just what's needed. Here's output from an example test
script that checks two text documents and then two (trivial) data
structures:

http://search.cpan.org/dist/Test-Differences