sessionStorage tidak ditentukan di Jasmine

Saya mengikuti postingan ini untuk mengatur sessionStorage saya:

tapi apa pun yang saya lakukan, sessionStorage saya masih belum ditentukan. Saya dapat masuk ke penyimpananMock(), tetapi ketika saya keluar, itu masih belum terdefinisi. Apa kesalahan yang telah aku perbuat?

Berikut kodenya:

/// <reference path="../angular.js" />
/// <reference path="../angular-mocks.js" />
/// <reference path="../angular-animate.js" />
/// <reference path="../angular-ui/ui-bootstrap.js" />
/// <reference path="../angular-ui/ui-bootstrap-tpls.js" />

/// <reference path="../../../bluescopebuildings/app/app.js" />
/// <reference path="../../../bluescopebuildings/app/applicationapp.js" />


describe('Controller: applicationController', function () {
    // Storage Mock
    function storageMock() {
        var storage = {};

        return {
            setItem: function (key, value) {
                storage[key] = value || '';
            },
            getItem: function (key) {
                return storage[key] || null;
            },
            removeItem: function (key) {
                delete storage[key];
            },
            get length() {
                return Object.keys(storage).length;
            },
            key: function (i) {
                var keys = Object.keys(storage);
                return keys[i] || null;
            }
        };
    };
    var applicationCtrl, $scope, $window;


    beforeEach(function () {
        module('main');

        // INJECT! This part is critical
        // $rootScope - injected to create a new $scope instance.
        // $controller - injected to create an instance of our controller.
        // $q - injected so we can create promises for our mocks.
        // _$timeout_ - injected to we can flush unresolved promises.
        inject(function ($rootScope, $controller, $q, _$timeout_,_$window_) {
            $scope = $rootScope.$new();
            $timeout = _$timeout_;
            $window = _$window_;
            $window.sessionStorage = {};
            $window.sessionStorage = storageMock();
            $window.sessionStorage.setItem('userName', 'Thao');
            $window.sessionStorage.setItem('userID', 10);
            $window.sessionStorage.setItem('profileID', 25);

            applicationCtrl = $controller('applicationController', {
                $scope: $scope,
                $window: $window
            });
        });
    });

    it('should return profile', function () {
        //$scope.currentUserID = 10;
        //$scope.currentUserName = 'Thao';
        //$scope.currentJobID = 62;
        //$scope.profile = null;

        $scope.GetProfile();
        expect($scope.profile).not.toBe(null);
    });
});

Saya mencoba tanpa memanggil storageMock(), tetapi tetap tidak berhasil. Terima kasih