How to unit test ui-route in angular js?

I have a simple directive that builds this kind of html:

Feeds Snapshots

I want to unit test it (karma+jasmine) as follows:

I just want to check if i put a state of feeds, the button is 'active', How should i procced:

var scope,compile;

beforeEach(module('feedsSnapshotsApp'));
beforeEach(module('directives'));

beforeEach(inject(function ($rootScope,$compile) {
    scope = $rootScope.$new();
    compile = $compile;
...
   scope.state = 'feeds' //?
it('should check if state is active',function(){
     //What is the check that i can do here?
})