Add tests of speed reduction in preMove
Remove redundant argument in tests
Change order of tests to match order in which they are defined in source
Simplify tests to increase readability
Add tests for collision method of asteroids.ship, for complete coverage. Refactor away some duplication
Stub asteroids.AlientBullet in BigAlien spec. Make it possible to run tests even without AlienBullet (and its dependecies) by defining it as empty function when previously undefined
Improve stubbing in BigAlien spec
Fix typo with name of BigAlien bottom sprite
Add tests for newPosition method of BigAlien