How to add support for ngMock (unit testing)

I am using Ionic 1.3.1. I am new to the framework. I want to test my $http functionality without a server backend. My understanding is that I should be using the Angular ngMock/httpBackend unit testing feature.

It seems that ngMock is not present / enabled (whatever) in a default project. I’ve found very few recipes for enabling ngMock in Ionic, none which provide explicit steps for a newbie.

Can someone provide me a precise, reliable recipe for adding ngMock to my Ionic project (sass-enabled)?

Thanks so much.