It's been years now since I last wrote an abstract class in my code, and when I tried to understand the reason I was surprised it was because of Test-Driven Development (TDD)! The process of TDD is shaping my code in a way that favors composition.

In this session, refactoring a simple piece of code, you'll discover how your thought process is influenced by the practices (TDD, Living Documentation, refactoring to Design Patterns) which in turn drives your design.