Pharo is a modern, dynamically-typed, reflective, and pure object-oriented programming language - http: //www.pharo.org. Pharo inherits and enhances the testing spirit from its ancestor Smalltalk. Indeed, Pharo's SUnit framework is the one of key asset of Agile Development as brought forward by K. Beck in its Test-Driven Development seminal book. But Pharo is much more powerful. It defines and supports eXtreme Test-Driven Development, a.k.a TDD on...