Followup to #64 - Tests needed

[vexx32]

Following up on #64, quite a bit of functionality was changed and existing tests didn't really cut it - the basic ones we had didn't do a great deal anyway.

We're going to need to have tests covering as much of the functionality as we can manage; at the very least we should validate that this plugin manages to operate correctly in at least the main 3 OS variants (windows, mac, linux) and that the exposed options added or modified in #64 are validated in one way or another - modules get installed / bootstrapped correctly, tests run as they ought to, etc.