Add more information on unclosed session

src/NHibernate.Test/DebugSessionFactory.cs

@@ -43,14 +43,13 @@ public partial class DebugSessionFactory : ISessionFactoryImplementor
 		/// it debug or not.
 		/// </summary>
 		public DebugConnectionProvider DebugConnectionProvider
-			=> _debugConnectionProvider ??
-				(_debugConnectionProvider = ActualFactory.ConnectionProvider as DebugConnectionProvider);
+			=> _debugConnectionProvider ??= ActualFactory.ConnectionProvider as DebugConnectionProvider;
 		public ISessionFactoryImplementor ActualFactory { get; }
 
 		public EventListeners EventListeners => ((SessionFactoryImpl)ActualFactory).EventListeners;
 
 		[NonSerialized]
-		private readonly ConcurrentBag<ISessionImplementor> _openedSessions = new ConcurrentBag<ISessionImplementor>();
+		private readonly ConcurrentQueue<ISessionImplementor> _openedSessions = new();
 		private static readonly ILog _log = LogManager.GetLogger(typeof(DebugSessionFactory).Assembly, typeof(TestCase));
 
 		public DebugSessionFactory(ISessionFactory actualFactory)
@@ -63,29 +62,43 @@ public DebugSessionFactory(ISessionFactory actualFactory)
 		public bool CheckSessionsWereClosed()
 		{
 			var allClosed = true;
+			var number = 1;
 			foreach (var session in _openedSessions)
 			{
-				// Do not inverse, we want to close all of them.
-				allClosed = CheckSessionWasClosed(session) && allClosed;
+				var wasClosed = CheckSessionWasClosed(session);
+				// No early exit out of the loop: we want to close all forgotten sessions.
+				if (!wasClosed)
+				{
+					_log.ErrorFormat("Test case didn't close session {0}, n°{1} of {2}, closing.",
+						session.SessionId, number, _openedSessions.Count);
+				}
+				allClosed = wasClosed && allClosed;
+
 				// Catches only session opened from another one while sharing the connection. Those
 				// opened without sharing the connection stay un-monitored.
 				foreach (var dependentSession in session.ConnectionManager.DependentSessions.ToList())
 				{
-					allClosed = CheckSessionWasClosed(dependentSession) && allClosed;
+					wasClosed = CheckSessionWasClosed(dependentSession);
+					if (!wasClosed)
+					{
+						_log.ErrorFormat("Test case didn't close dependent session {0} of the session {3}, n°{1} of {2}, closing.",
+							dependentSession.SessionId, number, _openedSessions.Count, session.SessionId);
+					}
+					allClosed = wasClosed && allClosed;
 				}
+				number++;
 			}
 
 			return allClosed;
 		}
 
-		private bool CheckSessionWasClosed(ISessionImplementor session)
+		private static bool CheckSessionWasClosed(ISessionImplementor session)
 		{
 			session.TransactionContext?.Wait();
 
 			if (!session.IsOpen)
 				return true;
 
-			_log.Error($"Test case didn't close session {session.SessionId}, closing");
 			(session as ISession)?.Close();
 			(session as IStatelessSession)?.Close();
 			return false;
@@ -101,7 +114,7 @@ ISession ISessionFactory.OpenSession(DbConnection connection)
 #pragma warning disable CS0618 // Type or member is obsolete
 			var s = ActualFactory.OpenSession(connection);
 #pragma warning restore CS0618 // Type or member is obsolete
-			_openedSessions.Add(s.GetSessionImplementation());
+			_openedSessions.Enqueue(s.GetSessionImplementation());
 			return s;
 		}
 
@@ -110,7 +123,7 @@ ISession ISessionFactory.OpenSession(IInterceptor sessionLocalInterceptor)
 #pragma warning disable CS0618 // Type or member is obsolete
 			var s = ActualFactory.OpenSession(sessionLocalInterceptor);
 #pragma warning restore CS0618 // Type or member is obsolete
-			_openedSessions.Add(s.GetSessionImplementation());
+			_openedSessions.Enqueue(s.GetSessionImplementation());
 			return s;
 		}
 
@@ -119,14 +132,14 @@ ISession ISessionFactory.OpenSession(DbConnection conn, IInterceptor sessionLoca
 #pragma warning disable CS0618 // Type or member is obsolete
 			var s = ActualFactory.OpenSession(conn, sessionLocalInterceptor);
 #pragma warning restore CS0618 // Type or member is obsolete
-			_openedSessions.Add(s.GetSessionImplementation());
+			_openedSessions.Enqueue(s.GetSessionImplementation());
 			return s;
 		}
 
 		ISession ISessionFactory.OpenSession()
 		{
 			var s = ActualFactory.OpenSession();
-			_openedSessions.Add(s.GetSessionImplementation());
+			_openedSessions.Enqueue(s.GetSessionImplementation());
 			return s;
 		}
 
@@ -138,14 +151,14 @@ IStatelessSessionBuilder ISessionFactory.WithStatelessOptions()
 		IStatelessSession ISessionFactory.OpenStatelessSession()
 		{
 			var s = ActualFactory.OpenStatelessSession();
-			_openedSessions.Add(s.GetSessionImplementation());
+			_openedSessions.Enqueue(s.GetSessionImplementation());
 			return s;
 		}
 
 		IStatelessSession ISessionFactory.OpenStatelessSession(DbConnection connection)
 		{
 			var s = ActualFactory.OpenStatelessSession(connection);
-			_openedSessions.Add(s.GetSessionImplementation());
+			_openedSessions.Enqueue(s.GetSessionImplementation());
 			return s;
 		}
 
@@ -158,7 +171,7 @@ ISession ISessionFactoryImplementor.OpenSession(
 #pragma warning disable CS0618 // Type or member is obsolete
 			var s = ActualFactory.OpenSession(connection, flushBeforeCompletionEnabled, autoCloseSessionEnabled, connectionReleaseMode);
 #pragma warning restore CS0618 // Type or member is obsolete
-			_openedSessions.Add(s.GetSessionImplementation());
+			_openedSessions.Enqueue(s.GetSessionImplementation());
 			return s;
 		}
 
@@ -429,7 +442,7 @@ public SessionBuilder(ISessionBuilder actualBuilder, DebugSessionFactory debugFa
 			ISession ISessionBuilder<ISessionBuilder>.OpenSession()
 			{
 				var s = _actualBuilder.OpenSession();
-				_debugFactory._openedSessions.Add(s.GetSessionImplementation());
+				_debugFactory._openedSessions.Enqueue(s.GetSessionImplementation());
 				return s;
 			}
 
@@ -504,7 +517,7 @@ public StatelessSessionBuilder(IStatelessSessionBuilder actualBuilder, DebugSess
 			IStatelessSession IStatelessSessionBuilder.OpenStatelessSession()
 			{
 				var s = _actualBuilder.OpenStatelessSession();
-				_debugFactory._openedSessions.Add(s.GetSessionImplementation());
+				_debugFactory._openedSessions.Enqueue(s.GetSessionImplementation());
 				return s;
 			}