Added a test for checking xml generation of nested composite elements

Author: paulbatum

src/FluentNHibernate.Testing/DomainModel/Mapping/ComponentElementPartTester.cs

@@ -1,3 +1,4 @@
+using System.Collections.Generic;
 using NUnit.Framework;
 
 namespace FluentNHibernate.Testing.DomainModel.Mapping
@@ -19,5 +20,33 @@ public void CanIncludeParentReference()
                 .Element("class/bag/composite-element/parent").Exists()
                 .HasAttribute("name", "MyParent");
         }
+
+        [Test]
+        public void CanCreateNestedCompositeElement()
+        {
+            new MappingTester<TopLevel>()
+                .ForMapping(
+                    a => a.HasMany(x => x.Items)
+                        .AsList()
+                        .Component(item =>
+                        {
+                            item.Component(i => i.Target, n => n.Map(z => z.Name));
+                            item.Map(x => x.SomeString);
+                        })                        
+                )                
+                .Element("class/list/composite-element/nested-composite-element").Exists()
+                .HasAttribute("name", "Target");
+        }
+
+        private class TopLevel
+        {
+            public IList<Item> Items { get; set; }
+        }
+
+        private class Item
+        {
+            public PropertyTarget Target { get; set; }
+            public string SomeString { get; set; }
+        }
     }
 }