code: def test_no_command(self, mock_hook):
      op = WinRMOperator(
          task_id="test_task_id", winrm_hook=mock_hook, command=None
      )
      exception_msg = "No command specified so nothing to execute here."
      with pytest.raises(AirflowException, match=exception_msg):
          op.execute(None)
  
imports: from __future__ import annotations
  from unittest import mock
  import pytest
  from airflow.exceptions import AirflowException
  from airflow.providers.microsoft.winrm.operators.winrm import WinRMOperator
label_desc: Use image node_id 2 for calling the TestWinRMOperator obj's underlying member method code with example usage: obj.test_no_command(mock_hook) without return types