code: def test_marking_virtualenv_python_task_as_teardown_with_on_failure_fail(
      self, dag_maker, on_failure_fail_dagrun
  ):
      @teardown(on_failure_fail_dagrun=on_failure_fail_dagrun)
      @task.virtualenv
      def f():
          return 1
  
      with dag_maker() as dag:
          ret = f()
  
      assert len(dag.task_group.children) == 1
      teardown_task = dag.task_group.children["f"]
      assert teardown_task.is_teardown
      assert (
          teardown_task.on_failure_fail_dagrun is on_failure_fail_dagrun
      )
      ret.operator.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE)
  
imports: from __future__ import annotations
  import datetime
  import sys
  from subprocess import CalledProcessError
  import pytest
  from airflow.decorators import setup, task, teardown
  from airflow.utils import timezone
label_desc: Use image node_id 15 for calling the TestPythonVirtualenvDecorator obj's underlying member method code with example usage: obj.test_marking_virtualenv_python_task_as_teardown_with_on_failure_fail(dag_maker, on_failure_fail_dagrun) and returns: int