Have IFutureEnumerable.GetEnumerable executing immediatly the query

Author: fredericDelaporte

src/NHibernate.Test/Async/Futures/FutureQueryFixture.cs

@@ -152,5 +152,25 @@ public async Task CanExecuteMultipleQueryWithSameParameterNameAsync()
 				}
 			}
 		}
+
+		[Test]
+		public async Task FutureExecutedOnGetEnumerableAsync()
+		{
+			Sfi.Statistics.IsStatisticsEnabled = true;
+			try
+			{
+				using (var s = Sfi.OpenSession())
+				{
+					var persons = s.CreateQuery("from Person").Future<Person>();
+					Sfi.Statistics.Clear();
+					await (persons.GetEnumerableAsync());
+					Assert.That(Sfi.Statistics.PrepareStatementCount, Is.EqualTo(1));
+				}
+			}
+			finally
+			{
+				Sfi.Statistics.IsStatisticsEnabled = false;
+			}
+		}
 	}
 }

src/NHibernate.Test/Futures/FutureQueryFixture.cs

@@ -141,5 +141,25 @@ public void CanExecuteMultipleQueryWithSameParameterName()
 				}
 			}
 		}
+
+		[Test]
+		public void FutureExecutedOnGetEnumerable()
+		{
+			Sfi.Statistics.IsStatisticsEnabled = true;
+			try
+			{
+				using (var s = Sfi.OpenSession())
+				{
+					var persons = s.CreateQuery("from Person").Future<Person>();
+					Sfi.Statistics.Clear();
+					persons.GetEnumerable();
+					Assert.That(Sfi.Statistics.PrepareStatementCount, Is.EqualTo(1));
+				}
+			}
+			finally
+			{
+				Sfi.Statistics.IsStatisticsEnabled = false;
+			}
+		}
 	}
 }

src/NHibernate/Impl/DelayedEnumerator.cs

@@ -25,11 +25,7 @@ public DelayedEnumerator(GetResult result, GetResultAsync resultAsync)
 
 		public IEnumerable<T> GetEnumerable()
 		{
-			var value = _result();
-			foreach (T item in value)
-			{
-				yield return item;
-			}
+			return _result();
 		}
 
 		// Remove in 6.0