code: def test_get_sftp_tree_behavior(self):
      operator = SFTPToWasbOperator(
          task_id=TASK_ID,
          sftp_source_path=WILDCARD_PATH,
          sftp_conn_id=SFTP_CONN_ID,
          container_name=CONTAINER_NAME,
          wasb_conn_id=WASB_CONN_ID,
          move_object=False,
      )
      (
          sftp_complete_path,
          prefix,
          delimiter,
      ) = operator.get_tree_behavior()
  
      assert (
          sftp_complete_path == "main_dir"
      ), "not matched at expected complete path"
      assert prefix == "main_dir/", "Prefix must be EQUAL TO wildcard"
      assert delimiter == "", "Delimiter must be empty"
  
file_path: airflow/tests/providers/microsoft/azure/transfers/test_sftp_to_wasb.py
imports: from __future__ import annotations
  from unittest import mock
  import pytest
  from airflow.exceptions import AirflowException
  from airflow.providers.microsoft.azure.transfers.sftp_to_wasb import SftpFile, SFTPToWasbOperator
label_desc: Use image node_id 3 for calling the TestSFTPToWasbOperator obj's underlying member method code with example usage: obj.test_get_sftp_tree_behavior() without return types