code: def test_key_changes(
      self,
      current_objects,
      expected_returns,
      inactivity_periods,
      time_machine,
  ):
      time_machine.move_to(DEFAULT_DATE)
      for current, expected, period in zip(
          current_objects, expected_returns, inactivity_periods
      ):
          assert self.sensor.is_keys_unchanged(current) == expected
          assert self.sensor.inactivity_seconds == period
          time_machine.coordinates.shift(10)
  
imports: from __future__ import annotations
  from datetime import datetime
  from unittest import mock
  import pytest
  import time_machine
  from airflow.exceptions import AirflowException, AirflowSkipException
  from airflow.models import DAG, DagRun, TaskInstance
  from airflow.models.variable import Variable
  from airflow.providers.amazon.aws.sensors.s3 import S3KeySensor, S3KeysUnchangedSensor
  from airflow.utils import timezone
label_desc: Use image node_id 5 for calling the TestS3KeysUnchangedSensor obj's underlying member method code with example usage: obj.test_key_changes(current_objects, expected_returns, inactivity_periods, time_machine) without return types