javascript - What is the best way to mock/stub $localForage in AngularJS tests? -

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i want test factory , uses $localforage. best way test methods inside factory? assuming karma's config ok.

check example below:

./test/spec/factories/ux-event.js

    'use strict';      describe('service: uxeventfactory', function () {       beforeeach(module('paxapp'));        var uxeventfactory;       beforeeach(inject(function (_uxeventfactory_) {         uxeventfactory = _uxeventfactory_;       }));        it('gets instance of uxeventfactory', function () {         expect(uxeventfactory).tobedefined();       });        it('enqueues item in database', function () {         var key = uxeventfactory.enqueue('1', '2', '3', '4');         expect($localforage.getitem(key)).tobe({           name: '1',           action: '2',           label: '3',           value: '4'         });       });     });

./app/scripts/factories/ux-event.js

    'use strict';      /**      * @ngdoc service      * @name paxapp.uxeventfactory      * @description      * # uxeventfactory      * factory in paxapp.      */     angular.module('paxapp')       .factory('uxeventfactory', function ($localforage) {         return {           enqueue: function (name, action, label, value) {             var uxevent = {               name: name,               action: action,               label: label,               value: value             };             var key = 'uxevent-' + new date().gettime();             $localforage.setitem(key, uxevent);             return key;           }         };       });


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