Today there was an interesting discussion between Kent Beck, Martin Fowler, and David Heinemeier Hansson on the nature and use of Test-Driven Development (TDD), where one writes tests first and then writes code. Each participant in the conversation had different personal preferences for how they write code, which makes sense. However, from each participant’s personal preference you could extract an identical principle: “I need to observe something before I can make a decision.” Kent oft...
