Any MobileSDK devs here? MockSmartStore localStorage version

As part of my work with MobileCaddy (http://developer.mobilecaddy,.net) I've put together a version of the MockSmartStore (https://github.com/forcedotcom/SalesforceMobileSDK-Shared/blob/master/test/MockSmartStore.js) that uses localStorage to allow data to persist between sessions during offline / out-of-container development. It seems to be working pretty well and so I was hoping to put in a pull request... before doing so though I wanted to make sure it was fully tested and up-to-scratch.

I'm hoping for some pointers on how the dev env. for working on the MobileSDK itself is set up, is it as easy as cloning, running the tools/grunt and then opening the test HTML page? And also, is there anyway to confirm that all these tests are currently passing?