public void TestDeleteDomainWhenDomainHasNoChildrens()
        {
            _dynamicMock = new DynamicMock(typeof(EconomicActivityManager));
            EconomicActivity activity = new EconomicActivity { Id = 1, Name = "Services", Childrens = new List<EconomicActivity>()};

            _dynamicMock.Expect("UpdateEconomicActivity",activity);

            _economicActivityManager = (EconomicActivityManager)_dynamicMock.MockInstance;
            _economicActivityServices = new EconomicActivityServices(_economicActivityManager);

            _economicActivityServices.DeleteEconomicActivity(activity);
        }