In this latest post in his "Peer Review" series Brandon Savage looks at things that can make the sample code he's been working with easier to test.

Now that we've worked out the abstraction issues and the logic questions, we should take a moment to focus our attention on a few of the issues relating to the architecture and testability of the class we've worked out.

He mentions changes to a call to get_included_files, a bit of code requiring magic quotes, and changes to the code to make writing using tests simpler (like injecting objects rather than creating them and writing a unit test every time a bug is found so it doesn't happen again).