A service you can create easily instances of and test.

ServiceExample.js

// NOTE: I ripped this out of my app so it's missing some context.  Just observe the methodology used.
// This was also incredibly simple to reach 100% testing across the board.

(function() {

    'use strict';

    angular.module('module.finder', [])
        .controller('ModuleFinderCtrl', ['$scope', 'Finder', function($scope, Finder) {
            $scope.finder = new Finder();
            $scope.finder.loadObjects();
            $scope.finder.loadTags();
        }])

        .factory('Finder', ['ObjectService', function(ObjectService) {
            var Finder = function() {
                var self = {};
                self.filters = {
                    types: [],
                    tags: [],
                    serieIds: [],
                    orderBy: 'updated_at',
                    direction: 'DESC',
                    query: ''
                };
                self.busy = false;
                self.showTypes = false;
                self.showTags = false;
                self.showSeries = false;
                self.page = 1;
                self.objects = [];
                
                return self;
            };

            return Finder;
        }])
        
})();