How to test a controller with a factory that needs to be resolved before the controller is loaded?

I need to test a controller that requires a factory to be resolved before the controller is loaded.

This is how the factory gets resolved in the routes:

app.js

angular
  .module('c2gyoApp', [
  ...
  ])
  .config(function($routeProvider) {
    $routeProvider
      ...
      .when('/sm', {
        templateUrl: 'views/sm.html',
        controller: 'SmCtrl',
        resolve: {
          stadtmobilRates: ['stadtMobilRates', function(stadtMobilRates) {
            return stadtMobilRates().then(function(resp) {
              return resp.data;
            });
          }]
        }
      })
      ...
    otherwise({
      redirectTo: '/c2g'
    });
  });

The factory:

stadtmobilrates.js

angular.module('c2gyoApp')
  .factory('stadtMobilRates', function($http) {
    var promise = null;

    return function() {
      if (promise) {
        // If we've already asked for this data once,
        // return the promise that already exists.
        return promise;
      } else {
        promise = $http.get('stadtmobilRates.json');
        return promise;
      }
    };
  }); 

The declaration of the controller I need to test with the stadtmobilRates factory injected:

smcontroller.js

angular.module('c2gyoApp')
  .controller('SmCtrl', [
    '$scope',
    'stadtmobilRates',
    function($scope, stadtmobilRates) {
    ...
    }
  ]);

My Karma test (generated by yeoman):

smcontrollertest.js

describe('Controller: SmCtrl', function() {

  // load the controller's module
  beforeEach(module('c2gyoApp'));

  var SmCtrl;
  var scope;

  // Initialize the controller and a mock scope
  beforeEach(inject(function($controller, $rootScope) {
    scope = $rootScope.$new();
    SmCtrl = $controller('SmCtrl', {
      $scope: scope
    });
  }));

  it('should calculate the correct price', function() {
    expect(scope.price(10, 10, 0, 0, 'A', 'basic')
      .toFixed(2)).toEqual((18.20).toFixed(2));
  });

});

Of course this fails because the factory is not resolved:

PhantomJS 1.9.8 (Windows 7) Controller: SmCtrl should calculate the correct price FAILED
Error: [$injector:unpr] Unknown provider: stadtmobilRatesProvider <- stadtmobilRates <- SmCtrl

So how do I resolve and inject the factory before the tests starts? I found a lot of posts about mocking a service to test it, but nothing to resolve it before a test.