Fix existing test with ast mock

Author: Jacob Foster

graphene_django/tests/test_types.py

@@ -1,4 +1,4 @@
-from mock import patch
+from mock import Mock, patch
 
 from graphene import Interface, ObjectType, Schema
 from graphene.relay import Node
@@ -38,7 +38,11 @@ def test_django_interface():
 
 @patch('graphene_django.tests.models.Article.objects.get', return_value=Article(id=1))
 def test_django_get_node(get):
-    article = Article.get_node(1, None, None)
+    ast_mock = Mock()
+    ast_mock.selection_set.selections = []
+    info_mock = Mock(field_asts=[ast_mock])
+
+    article = Article.get_node(1, None, info_mock)
     get.assert_called_with(pk=1)
     assert article.id == 1