--- a/web/test/data/schema.py	Wed Nov 25 16:28:41 2015 +0100
+++ b/web/test/data/schema.py	Fri Dec 04 14:56:20 2015 +0100
@@ -93,5 +93,22 @@
     title = String(maxsize=32, required=True, fulltextindexed=True)
     concerns = SubjectRelation('Project', composite='object')
 
+class Filesystem(EntityType):
+    name = String()
+
+class parent_fs(RelationDefinition):
+    name = 'parent'
+    subject = 'Directory'
+    object = 'Filesystem'
+
+class Directory(EntityType):
+    name = String()
+
+class parent_directory(RelationDefinition):
+    name = 'parent'
+    subject = 'Directory'
+    object = 'Directory'
+    composite = 'object'
+
 # used by windmill for `test_edit_relation`
 from cubes.folder.schema import Folder