code: def test_should_respect_base_url_when_proxy_fix_and_base_url_is_set_up_but_headers_missing(
      self, base_url, expected_exception
  ):
      with conf_vars({("webserver", "base_url"): base_url}):
          if expected_exception:
              with pytest.raises(
                  expected_exception.__class__,
                  match=re.escape(str(expected_exception)),
              ):
                  app = application.cached_app(testing=True)
                  app.url_map.add(Rule("/debug", endpoint="debug"))
              return
          app = application.cached_app(testing=True)
          app.url_map.add(Rule("/debug", endpoint="debug"))
  
      def debug_view():
          from flask import request
  
          # Should use original REMOTE_ADDR
          assert request.remote_addr == "192.168.0.1"
          # Should respect base_url
          assert (
              request.url == "http://invalid:9000/internal-client/debug"
          )
  
          return Response("success")
  
      app.view_functions["debug"] = debug_view
  
      new_environ = {
          "PATH_INFO": "/internal-client/debug",
          "REMOTE_ADDR": "192.168.0.1",
          "HTTP_HOST": "invalid:9000",
      }
      environ = create_environ(environ_overrides=new_environ)
  
      response = Response.from_app(app, environ)
  
      assert b"success" == response.get_data()
      assert response.status_code == 200
  
imports: from __future__ import annotations
  import hashlib
  import re
  import runpy
  import sys
  from datetime import timedelta
  from unittest import mock
  import pytest
  from werkzeug.routing import Rule
  from werkzeug.test import create_environ
  from werkzeug.wrappers import Response
  from airflow.exceptions import AirflowConfigException
  from airflow.www import app
  from tests.test_utils.config import conf_vars
  from tests.test_utils.decorators import dont_initialize_flask_app_submodules
label_desc: Use image node_id 4 for calling the TestApp obj's underlying member method code with example usage: obj.test_should_respect_base_url_when_proxy_fix_and_base_url_is_set_up_but_headers_missing(base_url, expected_exception) and returns: Response