public void TestDeleteInUse()
        {
            Area area = _dataGenerator.CreateArea();
            Route route = _dataGenerator.CreateRouteInArea(area: area);

            IAreaDao areaDao = new AreaDao(_graphClient);
            Action action = ()=>areaDao.Delete(area);
            action.ShouldThrow<NodeInUseException>();
        }
        public void TestDeleteNotInUse()
        {
            Country country = _dataGenerator.CreateCountry();
            Area area = _dataGenerator.CreateArea(country:country);
            IAreaDao areaDao = new AreaDao(_graphClient);
            areaDao.Delete(area);

            Assert.AreEqual(0,areaDao.GetAllIn(country).Count);
        }