Fixed tests due to mana cost attirbute now being included

Author: Galarzaa90

tests/tests_models.py

@@ -163,7 +163,9 @@ def test_item_perfect_shot(self):
                           content=load_resource("content_item_perfect_shot.txt"))
         item = models.Item.from_article(article)
         self.assertIsInstance(item, models.Item)
-        self.assertEqual(11, len(item.attributes))
+        self.assertEqual(12, len(item.attributes))
+        self.assertIn("perfect_shot", item.attributes_dict)
+        self.assertIn("perfect_shot_range", item.attributes_dict)
 
     def test_key(self):
         article = Article(1, "Key 3940", timestamp="2018-08-20T04:33:15Z",