TDD Tetris Tutorial #7: TGM Rotation Rules

This screencast series shows how to go through the TDD Tetris Tutorial where you can learn Test-Driven Development by at first writing code to pass pre-written tests, so that it will be easier to write your own tests when the time for it comes.

Replacing our previously written rotation algorithm with a simpler and more flexible implementation, so that we can change our game to use the rotation rules from Tetris: The Grand Master.

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