Move Asteroid into asteroids namespace
Move to safe position in asteroids.Asteroid method instead of in asteroids.Game to make writing tests easier and separate responsibilities in a more sane way
Replace sprites.push with calls to new method addSprites, improve stubbing
Format tests, add/remove whitespace where approriate, etc.
Format code, add/remove whitespace where approriate, etc.
Add tests for updateSprites
Move Sprite to asteroids namespace