angular js testing promises

spec.js

// incject
inject(function(_$rootScope_, _$controller_, _$q_, _$injector_) {...}
// when 
when(function(){
        deferred.resolve({model: 'balba'});
        $rootScope.$digest();        
})


function MockService() {

                return {
                    get: function() {
                        deferred = $q.defer();
                        return deferred.promise;
                    }
                };
            }