How can I use Watir to automate applications written in node-webkit?

I used Watir to automate Chrome browser based UI testing (loading web pages, taking actions on HTML elements, etc.) and it was a great success.

We are launching several new projects that use node-webkit ( https://github.com/rogerwang/node-webkit ), Chromium and node.js application runtime. I didn't figure out how to use Waitr to automate it.

Does anyone know how to do this? If not, is there another tool for this purpose?

Thanks for the help.