Test case for GH2563

ByCodeFixture.cs

using System;
using System.IO;
using System.Linq;
using System.Runtime.Serialization.Formatters.Binary;
using NHibernate.Cfg.MappingSchema;
using NHibernate.Mapping.ByCode;
using NUnit.Framework;

namespace NHibernate.Test.NHSpecificTest.GH2563
{
	[Serializable]
	public class Entity
	{
		public virtual int Id { get; set; }
		public virtual Entity Parent { get; set; }
		public virtual Entity Child { get; set; }
		public virtual string Name { get; set; }
	}
	
	[TestFixture]
	public class ByCodeFixture : TestCaseMappingByCode
	{
		protected override HbmMapping GetMappings()
		{
			var mapper = new ModelMapper();
			mapper.Class<Entity>(rc =>
			{
				rc.Id(x => x.Id, m => m.Generator(Generators.Assigned));
				rc.Property(x => x.Name, m => m.Lazy(true));
				rc.ManyToOne(x => x.Child);
				rc.ManyToOne(x => x.Parent);
			});

			return mapper.CompileMappingForAllExplicitlyAddedEntities();
		}

		protected override void OnSetUp()
		{
			using (var session = OpenSession())
			using (var transaction = session.BeginTransaction())
			{
				var e1 = new Entity
				{
					Id = 1,
					Name = "Middle",
				};
				e1.Parent = new Entity
				{
					Id = 2,
					Name = "Parent",
					Child = e1
				};

				session.Save(e1);
				session.Save(e1.Parent);

				transaction.Commit();
			}
		}

		protected override void OnTearDown()
		{
			using (var session = OpenSession())
			using (var transaction = session.BeginTransaction())
			{
				session.CreateQuery("delete from System.Object").ExecuteUpdate();
				transaction.Commit();
			}
		}

		[Test]
		public void SerializationOfConnectedEntitiesWithLazyProperties()
		{
			using (var session = OpenSession())
			{
				var result = session.Query<Entity>().ToList();
				var ds = SpoofSerialization(session);
			}
		}
		
		private T SpoofSerialization<T>(T session)
		{
			var formatter = new BinaryFormatter();
			var stream = new MemoryStream();
			formatter.Serialize(stream, session);

			stream.Position = 0;
			return (T) new BinaryFormatter().Deserialize(stream);
		}
	}
}