code: def test_requires_authentication_with_no_header(self, app):
      with app.test_request_context() as mock_context:
          mock_context.request.authorization = None
          result = function_decorated()
  
      assert type(result) is Response
      assert result.status_code == 401
  
file_path: airflow/tests/providers/fab/auth_manager/api/auth/backend/test_basic_auth.py
imports: from __future__ import annotations
  from unittest.mock import Mock, patch
  import pytest
  from flask import Response
  from flask_appbuilder.const import AUTH_LDAP
  from airflow.api.auth.backend.basic_auth import requires_authentication
  from airflow.www import app
label_desc: Use image node_id 2 for calling the TestBasicAuth obj's underlying member method code with example usage: obj.test_requires_authentication_with_no_header(app) without return types