Unit-Test % fix for NH-3241 by removing Fetch operators during linq expression rewrite.

Cherry-picked from 2073044, contributed by Pablo Ruiz García.

Author: pruiz

src/NHibernate.Test/Linq/ByMethod/AnyTests.cs

@@ -1,5 +1,6 @@
 using System.Linq;
 using NUnit.Framework;
+using NHibernate.Linq;
 
 namespace NHibernate.Test.Linq.ByMethod
 {
@@ -35,5 +36,12 @@ public void ManyToManyAny()
 
 			Assert.AreEqual(0, result.Count);
 		}
+
+		[Test]
+		public void AnyWithFetch()
+		{
+			//NH-3241
+			var result = db.Orders.Fetch(x => x.Customer).FetchMany(x => x.OrderLines).Any();
+		}
 	}
 }

src/NHibernate/Linq/ReWriters/RemoveUnnecessaryBodyOperators.cs

@@ -3,6 +3,7 @@
 using Remotion.Linq;
 using Remotion.Linq.Clauses;
 using Remotion.Linq.Clauses.ResultOperators;
+using Remotion.Linq.EagerFetching;
 
 namespace NHibernate.Linq.ReWriters
 {
@@ -31,7 +32,11 @@ public override void VisitResultOperator(ResultOperatorBase resultOperator, Quer
 			{
 				Array.ForEach(queryModel.ResultOperators.OfType<CastResultOperator>().ToArray(), castOperator=> queryModel.ResultOperators.Remove(castOperator));
 			}
-
+			if (resultOperator is AnyResultOperator)
+			{
+				Array.ForEach(queryModel.ResultOperators.OfType<FetchOneRequest>().ToArray(), op => queryModel.ResultOperators.Remove(op));
+				Array.ForEach(queryModel.ResultOperators.OfType<FetchManyRequest>().ToArray(), op => queryModel.ResultOperators.Remove(op));
+			}
 			base.VisitResultOperator(resultOperator, queryModel, index);
 		}
 	}