Provide some method of testing custom output rulesets

[GoogleCodeExporter]

There's currently no easy way to test custom rulesets without making a real 
commit in the repository. Please provide an example of what the message will 
look like while validating the rulesets since you're already going to 
network.

Original issue reported on code.google.com by mike.lifeguard@gmail.com on 5 Jun 2010 at 6:58