docstr: Tests that pods are mutated by the pod_mutation_hook
  function in airflow_local_settings.
docstr_tok: ["Tests","that","pods","are","mutated","by","the","pod_mutation_hook","function","in","airflow_local_settings","."]
code: def test_pod_mutation_hook(self):
      """
      Tests that pods are mutated by the pod_mutation_hook
      function in airflow_local_settings.
      """
      with SettingsContext(
          SETTINGS_FILE_POD_MUTATION_HOOK, "airflow_local_settings"
      ):
          from airflow import settings
  
          settings.import_local_settings()
  
          pod = MagicMock()
          settings.pod_mutation_hook(pod)
  
          assert pod.namespace == "airflow-tests"
  
imports: from __future__ import annotations
  import os
  import sys
  import tempfile
  from unittest import mock
  from unittest.mock import MagicMock, call, patch
  import pytest
  from airflow.exceptions import AirflowClusterPolicyViolation, AirflowConfigException
  from tests.test_utils.config import conf_vars
label_desc: Use image node_id 8 for calling the TestLocalSettings obj's underlying member method code with example usage: obj.test_pod_mutation_hook() without return types