Testing Differences in Templates

I've been doing some template refactoring now, and since I want to make sure the new templates render exactly the same as the old ones, I used Schwern++'s Test::More to compare their outputs for all combinations of input variables I had. Things were great for the first small-and-obvious changes, but at some point both outputs looked the same to me, and yet were still failing the test, meaning something was off. But what?

A quick CPAN search pointed me to Barrie Slaymaker++'s Test::Differences (now maintained by Ovid++). After that, all I had to do was replace my is() call with eq_or_diff() and voilá:

#   Failed test 'templates should produce the exact same output'
#   at t/refactoring.t line 128.
# +---+------+---+----------+
# | Ln|  Got | Ln| Expected |
# +---+------+---+----------+
# | 3 |      | 3 |          |
# | 4 |      | 4 |          |
# | 5 |      | 5 |          |
# * 6 |\t\n  * 6 |\n        |
# | 7 |      | 7 |          |
# | 8 |      | 8 |          |
# | 9 |      | 9 |          |
# +---+------+---+----------+

Ha! Much easier, much direct. After a simple extra tab removal, all tests were successful and I could move on. Yay!