It certainly seems like Microsoft is 'cheating', but it also seems like an excellent but warped example of Test Driven Development: they solved the failing test by the simplest and most direct means available. If time and budget hold out they will refactor later to generalize.

How do the TDD proponents feel about Microsoft's approach? How is it different than the supposedly correct behaviour demonstrated here: http://thecleancoder.blogspot.com/2010/10/craftsman-62-dark-...