public void Get(DbContextOptions <OrderContext> options, DeliveryZoneFilter filter, int expectedResult)
 {
     try
     {
         using (var db = new OrderContext(options))
         {
             IEnumerable <DeliveryZone> result = new List <DeliveryZone>();
             var repository = new DeliveryZoneRepository(db);
             Assert.DoesNotThrow(() => result = repository.Get(filter));
             Assert.True(result != null && result.Count() == expectedResult);
         }
     }
     catch (Exception ex)
     {
         LogEventManager.Logger.Error(ex.Message, ex);
         throw;
     }
 }