code: def test_serialize_single(self):
      serialized_data = self.serializer_class(self.obj1)
      self.assertEqual(
          serialized_data.data["username"], self.obj1.username
      )
      self.assertEqual(serialized_data.data["email"], self.obj1.email)
  
      serialized_data = self.serializer_class(data=self.data)
      self.assertTrue(serialized_data.is_valid())
  
file_path: modelchimp/modelchimp/tests/serializers/test_user_serializer.py
imports: from modelchimp.tests import BaseTest
  from modelchimp.factories.factory_user import UserFactory
  from modelchimp.serializers.user import UserSerializer
  from modelchimp.models.user import User
label_desc: Use image node_id 2 for calling the UserSerializerTest obj's underlying member method code with example usage: obj.test_serialize_single() without return types