code: def test_exponential_delay(self, tries, lower, upper):
      result = self.batch_client.exponential_delay(tries)
      assert result >= lower
      assert result <= upper
  
imports: from __future__ import annotations
  import logging
  import time
  from unittest import mock
  import botocore.exceptions
  import pytest
  from airflow.exceptions import AirflowException
  from airflow.providers.amazon.aws.hooks.batch_client import BatchClientHook
  from airflow.providers.amazon.aws.utils.task_log_fetcher import AwsTaskLogFetcher
label_desc: Use image node_id 8 for calling the TestBatchClientDelays obj's underlying member method code with example usage: obj.test_exponential_delay(tries, lower, upper) without return types