public void updateStore()
        {
            Store s = sa.addStore("vadim and sons", new User("checker", "123456"));

            s.setStoreName("Susu and sons");
            sa.updateStore(s);
            Assert.AreEqual(1, sa.getAllStore().Count);
            Assert.AreEqual("Susu and sons", sa.getAllStore().First.Value.getStoreName());
        }