Test first, by intention

Test First, by Intention
A code and culture translation from the original Smalltalk to Ruby
Original by Ronald Jeffries, translation by Aleksi Niemela and Dave Thomas

In this document we show you the Ruby version of the Smalltalk code published in the Pink book. There's also an online version of the original (PDF 0.5MB, and zipped 1.0MB).
Table of contents
1. Introduction
2. In the Beginning a Test Should Fail
3. Then it should pass
4. The second test
5. Coming up with an Algorithm
6. Refactoring
7. Refactoring II