Behavior Driven Development Principles
According to AgileAlliance.org:
BDD (Behavior Driven Development) is a synthesis and refinement of practices stemming from TDD (Test Driven Development) and ATDD (Acceptance Test Driven Development).
That's great, but what does that really mean?
BDD has its roots in TDD, but supersedes TDD in the agile development process. BDD recognizes that User Stories are the framework for the development process and that these stories determine the necessary tasks required to satisfy given business requirements. Read more
Why Unit Test?
As a Microsoft Certified Trainer over the past 2 years, I've had the opportunity of teaching hundreds of professionals how to properly engage in unit testing. Amazingly enough, even though unit testing has been around quite a while, it is still a concept that is very infantile in the corporate arena. Most developers who have adopted unit testing are those who work for start-ups or the few companies who've started to embrace agile methodologies executing test-driven development (TDD).