code: def test_describe_replication_group(self):
      self._create_replication_group()
  
      self.hook.conn.describe_replication_groups.return_value = {
          "ReplicationGroups": [
              {"ReplicationGroupId": self.REPLICATION_GROUP_ID}
          ]
      }
  
      response = self.hook.describe_replication_group(
          replication_group_id=self.REPLICATION_GROUP_ID
      )
      assert (
          response["ReplicationGroups"][0]["ReplicationGroupId"]
          == self.REPLICATION_GROUP_ID
      )
  
file_path: airflow/tests/providers/amazon/aws/hooks/test_elasticache_replication_group.py
imports: from __future__ import annotations
  from unittest.mock import Mock
  import pytest
  from airflow.exceptions import AirflowException
  from airflow.providers.amazon.aws.hooks.elasticache_replication_group import ElastiCacheReplicationGroupHook
label_desc: Use image node_id 5 for calling the TestElastiCacheReplicationGroupHook obj's underlying member method code with example usage: obj.test_describe_replication_group() without return types