Add unittests for from_instance and to_instance getters

sequere/tests/__init__.py

@@ -10,6 +10,7 @@
 from sequere import settings
 from sequere.registry import registry
 from sequere.http import json
+from sequere.backends.database.models import Follow
 
 
 class FixturesMixin(Exam):
@@ -184,6 +185,16 @@ def setUp(self):
 
         reload(settings)
 
+    def test_from_instance_and_to_instance(self):
+        from ..models import follow
+
+        follow(self.user, self.project)
+
+        instance = Follow.objects.all()[0]
+
+        self.assertEqual(instance.to_instance, self.project)
+        self.assertEqual(instance.from_instance, self.user)
+
 
 @override_settings(SEQUERE_BACKEND_CLASS='sequere.backends.redis.RedisBackend')
 class RedisBackendTests(BaseBackendTests, TestCase):