Fix js unit test failures

Author: ihor-sviziev

dev/tests/js/jasmine/tests/app/code/Magento/Customer/frontend/js/customer-data.test.js

@@ -74,7 +74,16 @@ define([
                 originalReload = obj.reload;
                 originalInitNamespaceStorage = $.initNamespaceStorage;
                 spyOn(obj, 'reload').and.returnValue(true);
-                spyOn($, 'initNamespaceStorage').and.returnValue(true);
+                spyOn($, 'initNamespaceStorage').and.callFake(function (name) {
+                    let ns = {
+                        localStorage: {cookie: false, _ns: name},
+                        sessionStorage: {cookie: false, _ns: name}
+                    };
+
+                    $.namespaceStorages[name] = ns;
+
+                    return ns;
+                });
                 spyOn(dataProvider, 'getFromStorage');
                 spyOn(storage, 'keys').and.returnValue(['section']);
                 spyOn(storageInvalidation, 'keys').and.returnValue(['section']);
@@ -83,6 +92,7 @@ define([
             afterEach(function () {
                 obj.reload = originalReload;
                 $.initNameSpaceStorage = originalInitNamespaceStorage;
+                $.namespaceStorages={};
             });
 
             it('Should be defined', function () {