TDD Bowling Game

An example of doing Test-Driven Development using Bowling as the domain.

The game to be played

Below are some scenarios we can use to drive the development of the game.

when rolling all gutter balls, the score is 0.
when the first frame is a spare and the rest score 2, the score is 48.
when the first 2 frames are spare and the rest score 2, the score is 56.
when 10 frames have been bowled, don't allow any more to be bowled.
when the first frame is a strike and the rest score 2, the score is 50.
when the first 2 frames are strikes and the rest score 2, the score is 68.
when rolling a perfect game, the score is 300.
when rolling alternate strikes and spares, the score is 200.

Thanks

A special thanks to Ron Jeffries for the original idea, and Cory Foy for pushing it further.