Test case automation for regression

[Nevakanezah]

The plugin has several core use cases that are arduous to test properly, and verifying regression only becomes more difficult as development advances. Automating unit & integration tests is not only valuable, it's all but necessary to test many of these cases in a respectable way. A prospective list of test cases to automate includes:

• Foal attributes use new breeding formula, and fall within expected ranges (from https://github.com/Nevakanezah/HorseEnhancer/issues/5)
• CRUD cases for entries in HorseList (spawn, death, onUnload, etc)
• Setting parent names
• Horses.dat read/write integrity
• Inbreeding handling
• Secret horse handling
• Gender ratio
• Command output
• Input validation, in config file and otherwise
• Impact of config options

Create automated tests to validate the behaviour of key use cases like these.

[Nevakanezah]

An OSS utility exists for bukkit test automation that may make this process much easier - https://github.com/seeseemelk/MockBukkit, a Bukkit mocking framework that could measurably cut down on how much mock object invocation I'll require.