How to test a Rails application + PhoneGap?

Question

Ruby on Rails

I have a Rails application and an HTML Phonegap application that uses the API The
question is how to test this? Phonegap uses a number of features of a mobile device, which makes it impossible to test "just in the browser"
There is, for example, a Ripple extension for Chrome, but how to enable all this in tests?
There is emulate.phonegap.com - that is, a certain url where you can apparently run tests.
Any ideas how to organize it all in real life? It's hard to do without tests.