add visitor model and api

ui/tests.py

@@ -11,13 +11,13 @@ class SimpleTest(TestCase):
             username='testuser', email='test@test.test', password='testpass')
 
     def test_button(self):
-        # Create an instance of a GET request.
-        request = self.factory.get('/snippets')
-        request.user = self.user
+        # Test button page returns 200
+        request = self.factory.get('/button')
         request.session = self.client.session
         response = button(request)
         self.assertEqual(response.status_code, 200)
         
+        # Test button post returns 200 and increments button to 1
         request = self.factory.post(
             '/button',
             data={},
@@ -28,6 +28,7 @@ class SimpleTest(TestCase):
         self.assertEqual(response.status_code, 200)
         self.assertEqual(request.session.get('pressed'), 1)
 
+        # Test second click increments button to 2
         response = button(request)
         self.assertEqual(response.status_code, 200)
         self.assertEqual(request.session.get('pressed'), 2)