Better Code Coverage for Enemies

[ryanjphelan]

Goal is to properly test the game enemies by extending the BaseTest class. Increase the code coverage to a respectable level (>85%). Find a way to effectively test the onTick method for each enemy (and their variations).

• [x] Squirrel Enemy (Coverage update: 94%)
• [x] Speedy Enemy (Coverage update: 91%)
• [x] Tank Enemy (Coverage update: 100%)
• [x] Moose Enemy (Coverage update: 95%)

Note: will probably need to do another ticket later on if methods drastically change.

[ryanjphelan]

Finished testing for the 4 classes. Pleased with an average of 95% coverage across.