code: def test_init(self):
      assert self.operator.cluster_id == "j-8989898989"
      assert self.operator.step_concurrency_level == 1
      assert self.operator.aws_conn_id == "aws_default"
  
file_path: airflow/tests/providers/amazon/aws/operators/test_emr_modify_cluster.py
imports: from __future__ import annotations
  from unittest.mock import MagicMock, patch
  import pytest
  from airflow.exceptions import AirflowException
  from airflow.models.dag import DAG
  from airflow.providers.amazon.aws.operators.emr import EmrModifyClusterOperator
  from airflow.utils import timezone
label_desc: Use image node_id 2 for calling the TestEmrModifyClusterOperator obj's underlying member method code with example usage: obj.test_init() without return types