The game consists of 10 frames as shown above.  In each frame the player has
two opportunities to knock down 10 pins.  The score for the frame is the total
number of pins knocked down, plus bonuses for strikes and spares.

A spare is when the player knocks down all 10 pins in two tries.  The bonus for
that frame is the number of pins knocked down by the next roll.  So in frame 3
above, the score is 10 (the total number knocked down) plus a bonus of 5 (the
number of pins knocked down on the next roll.)

A strike is when the player knocks down all 10 pins on his first try.  The bonus
for that frame is the value of the next two balls rolled.

In the tenth frame a player who rolls a spare or strike is allowed to roll the extra
balls to complete the frame.  However no more than three balls can be rolled in
tenth frame.

Original Source: http://butunclebob.com/files/downloads/Bowling%20Game%20Kata.ppt

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1. Write the first failing test. Then write a factory that returns an object, or an aggregate of objects, that make the test pass.

The factory should be limited to creating objects and linking them together. No conditionals allowed.

2. Write the next failing test.

3. Can you make it pass by changing the factory and/or creating a new class and nothing else?
If yes, great! Go back to 2.
If not, refactor until you can.

The refactoring should bring the system to a state where it’s possible to implement the next test just by changing the aggregate of objects that is returned by the factory. Be careful not to implement new functionality; the current test should still fail.

