TST: Test reference property

unittests/test_json_schema_model_parser.py

@@ -385,3 +385,7 @@ def test_no_toplevel_entity():
     float_prop = rt1.get_property("number_prop")
     assert float_prop.datatype == db.DOUBLE
     assert rt1.get_importance(float_prop.name) == db.OBLIGATORY
+
+    uid_prop = rt1.get_property("user_id")
+    assert uid_prop.datatype == db.TEXT
+    assert rt1.get_importance(uid_prop.name) == db.RECOMMENDED