Merge pull request nhibernate#412 from DanielLaberge/NH-3681

Failing test for NH-3681

Author: hazzik

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

@@ -507,6 +507,19 @@ public void ProjectingWithSubQueriesFilteredByTheAggregateKey()
 Assert.That(result[15].FirstOrder, Is.EqualTo(10255));
 }
 
+[Test(Description = "NH-3681"), KnownBug("NH-3681 not yet fixed", "NHibernate.HibernateException")]
+public void SelectManyGroupByAggregateProjection()
+{
+var result = (from o in db.Orders
+ from ol in o.OrderLines
+ group ol by ol.Product.ProductId
+ into grp
+ select new {ProductId = grp.Key, Sum = grp.Sum(x => x.UnitPrice)}
+).ToList();
+
+Assert.That(result.Count, Is.EqualTo(77));
+}
+
 private static void CheckGrouping<TKey, TElement>(IEnumerable<IGrouping<TKey, TElement>> groupedItems, Func<TElement, TKey> groupBy)
 {
 var used = new HashSet<object>();