"scoring a game of bowling" is probably the most common application used when demoing TDD. It's so commonly known among the JUnit crowd that I chose one of Bob Martin's efforts as a demo for JUnit Factory.

The topic comes up about once a year on the TDD mailing list and it just came up again. By an odd coincidence, we just celebrated the completion of a new release of AgitarOne with a trip to Homestead Lanes, so I am all fired up about bowling despite my dismal performance (there was beer involved).

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