Peewee is the lightweight, minimalist unit testing library for PHP 5. It is designed for testing demands where assert() isn't enough and SimpleTest or PHPUnit are too much. Personally I wrote Peewee so that I could easily unit test short PHP scripts that are often less then a hundred lines. I didn't want to write lots of unit testing set up code I just wanted to start testing! It's also great for learning the basics of TDD.

However I'm not completely solid on the philosophy behind Peewee at this stage, I've already implemented more features than I originally planned to (initially I wanted the project to be a single file) and begun work on mock objects so Peewee could evolve into a more complete "let's get it done" testing framework.

Recently I've been quite inspired by RSpec http://rspec.rubyforge.org/ so I might want to more Peewee in a more behavioural direction for PHP. One thing I'm certain of is that I don't want to be constrained by the xUnit standard so there should be plenty of room for some experimental stuff. We'll see.