Add event hook for attaching Rattail config to new requests.

tests/test_subscribers.py

@@ -1,7 +1,9 @@
 
+from unittest import TestCase
+
 from mock import Mock
+from pyramid import testing
 
-from . import TestCase
 from tailbone import subscribers
 
 
@@ -11,3 +13,27 @@ class SubscribersTests(TestCase):
         event = Mock()
         event.__setitem__ = Mock()
         subscribers.before_render(event)
+
+
+class TestAddRattailConfigAttributeToRequest(TestCase):
+
+    def test_nothing_is_done_if_no_config_in_registry_settings(self):
+        request = testing.DummyRequest()
+        config = testing.setUp(request=request)
+        self.assertFalse('rattail_config' in request.registry.settings)
+        self.assertFalse(hasattr(request, 'rattail_config'))
+        event = Mock(request=request)
+        subscribers.add_rattail_config_attribute_to_request(event)
+        self.assertFalse(hasattr(request, 'rattail_config'))
+        testing.tearDown()
+
+    def test_attribute_added_if_config_present_in_registry_settings(self):
+        rattail_config = Mock()
+        request = testing.DummyRequest()
+        config = testing.setUp(request=request, settings={'rattail_config': rattail_config})
+        self.assertTrue('rattail_config' in request.registry.settings)
+        self.assertFalse(hasattr(request, 'rattail_config'))
+        event = Mock(request=request)
+        subscribers.add_rattail_config_attribute_to_request(event)
+        self.assertTrue(request.rattail_config is rattail_config)
+        testing.tearDown()