Adds unit test of backend_config module.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>

pgraph/tests/test_backend_config.py

@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+"""pgraph.tests.test_config module."""
+import sys
+import unittest
+if sys.version_info < (3, 0):
+    # pylint: disable=no-name-in-module,import-error
+    from test.test_support import EnvironmentVarGuard
+else:
+    from test.support import EnvironmentVarGuard
+
+
+class BackednConfigTests(unittest.TestCase):
+
+    """Backend config unit tests."""
+
+    def test_heroku_config(self):
+        """Load configuration for Heroku."""
+        with EnvironmentVarGuard() as env:
+            env.set('CONFIG_FILE', 'heroku.ini')
+            from pgraph import backend_config as bconfig
+            self.assertTrue(hasattr(bconfig, 'CELERY_RESULT_BACKEND'))
+            self.assertTrue(hasattr(bconfig, 'BROKER_URL'))
+            self.assertTrue(hasattr(bconfig, 'CELERY_SEND_EVENTS'))
+            self.assertTrue(hasattr(bconfig,
+                                    'CELERY_EVENT_QUEUE_EXPIRES'))
+            self.assertTrue(hasattr(bconfig, 'BROKER_POOL_LIMIT'))
+            self.assertTrue(hasattr(bconfig,
+                                    'BROKER_CONNECTION_TIMEOUT'))
+            self.assertTrue(hasattr(bconfig, 'BROKER_HEARTBEAT'))
+            self.assertTrue(hasattr(bconfig, 'MEMCACHED_SERVERS'))
+            self.assertTrue(hasattr(bconfig, 'MEMCACHED_USERNAME'))
+            self.assertTrue(hasattr(bconfig, 'MEMCACHED_PASSWORD'))
+            self.assertTrue(hasattr(bconfig, 'CACHE_NAME'))