--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/test/data/rqlexpr_on_computedrel.py	Sat Jan 16 13:48:51 2016 +0100
@@ -0,0 +1,16 @@
+from yams.buildobjs import ComputedRelation, EntityType, RelationDefinition
+from cubicweb.schema import RRQLExpression
+
+class Subject(EntityType):
+    pass
+
+class Object(EntityType):
+    pass
+
+class relation(RelationDefinition):
+    subject = 'Subject'
+    object = 'Object'
+
+class computed(ComputedRelation):
+    rule = 'S relation O'
+    __permissions__ = {'read': (RRQLExpression('S is ET'),)}