Coding philosophy
From OpenSimulator
First off, please read the stuff in our Contributions Policy. An additional point is that as OpenSimulator wants to be a modular 3D worlds virtual server. Therefore, before submitting your code you might want to consider whether it's part of the OpenSimulator core, or really would be considered a module that builds on top of OpenSimulator. If it's the latter, you may be better off hosting it externally and listing it on our Related Software page - a submission directly to OpenSimulator may mean it is removed at a later stage.
Regarding tests, feel free to write these - we have support for NUnit internally. However, we're not really at the stage where there are reams of tests yet - so great if you have them, but don't feel they are essentially in order to submit code.