Fix test for config object

tests/test_app.py

@@ -1,6 +1,4 @@
-# -*- coding: utf-8 -*-
-
-from __future__ import unicode_literals, absolute_import
+# -*- coding: utf-8; -*-
 
 import os
 from unittest import TestCase
@@ -29,4 +27,6 @@ class TestRattailConfig(TestCase):
         self.assertRaises(ConfigurationError, app.make_rattail_config, {})
         # get a config object if path provided
         result = app.make_rattail_config({'rattail.config': self.config_path})
-        self.assertTrue(isinstance(result, RattailConfig))
+        # nb. cannot test isinstance(RattailConfig) b/c now uses wrapper!
+        self.assertIsNotNone(result)
+        self.assertTrue(hasattr(result, 'get'))