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

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

• when rolling all gutter balls, the score is 0.
• when rolling all 1s, the score is 20.
• when the first frame is a spare and each subsequent roll score 2, the score is 48.
• when the first 2 frames are spares with [5,5] and subsequent rolls score 2, the score is 59.
• when 10 frames have been bowled, don't allow any more to be bowled.
• when the first frame is a strike and subsequent rolls 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.

A special thanks to Ron Jeffries for the original idea, and Cory Foy for pushing it further. Thanks also to Steve Harman (http://stevenharman.net/).