Re-Organize Unit Tests

[superjax]

I wrote most of the unit tests, and recently looked through them and have decided that they are horrific. I'm glad they are there (they just caught a potential optimization no-no in @dpkoch's code) but they need to be reworked.

[dpkoch]

Agreed. This will probably require rewriting some of our code to actually enable unit tests (instead integration tests, which is largely what all of our tests are now). This will probably best be done as part of our planned interface implementation refactoring