code: def test_patch_should_respond_400_for_invalid_fields_in_update_mask(
      self,
  ):
      role = create_role(self.app, "mytestrole")
      payload = {"name": "testme"}
      response = self.client.patch(
          f"/auth/fab/v1/roles/{role.name}?update_mask=invalid_name",
          json=payload,
          environ_overrides={"REMOTE_USER": "test"},
      )
      assert response.status_code == 400
      assert (
          response.json["detail"]
          == "'invalid_name' in update_mask is unknown"
      )
  
imports: from __future__ import annotations
  import pytest
  from airflow.api_connexion.exceptions import EXCEPTIONS_LINK_MAP
  from airflow.providers.fab.auth_manager.models import Role
  from airflow.providers.fab.auth_manager.security_manager.override import EXISTING_ROLES
  from airflow.security import permissions
  from tests.test_utils.api_connexion_utils import assert_401, create_role, create_user, delete_role, delete_user
label_desc: Use image node_id 4 for calling the TestPatchRole obj's underlying member method code with example usage: obj.test_patch_should_respond_400_for_invalid_fields_in_update_mask() without return types