code: def test_mark_tasks_past(self):
      # set one task to success towards end of scheduled dag runs
      snapshot = TestMarkTasks.snapshot_state(
          self.dag1, self.execution_dates
      )
      task = self.dag1.get_task("runme_1")
      dr = DagRun.find(
          dag_id=self.dag1.dag_id,
          execution_date=self.execution_dates[1],
      )[0]
      altered = set_state(
          tasks=[task],
          run_id=dr.run_id,
          upstream=False,
          downstream=False,
          future=False,
          past=True,
          state=State.SUCCESS,
          commit=True,
      )
      assert len(altered) == 2
      self.verify_state(
          self.dag1,
          [task.task_id],
          self.execution_dates,
          State.SUCCESS,
          snapshot,
      )
  
      snapshot = TestMarkTasks.snapshot_state(
          self.dag3, self.dag3_execution_dates
      )
      task = self.dag3.get_task("run_this")
      dr = DagRun.find(
          dag_id=self.dag3.dag_id,
          execution_date=self.dag3_execution_dates[1],
      )[0]
      altered = set_state(
          tasks=[task],
          run_id=dr.run_id,
          upstream=False,
          downstream=False,
          future=False,
          past=True,
          state=State.FAILED,
          commit=True,
      )
      assert len(altered) == 2
      self.verify_state(
          self.dag3,
          [task.task_id],
          self.dag3_execution_dates[:2],
          State.FAILED,
          snapshot,
      )
      self.verify_state(
          self.dag3,
          [task.task_id],
          [self.dag3_execution_dates[2]],
          None,
          snapshot,
      )
  
imports: from __future__ import annotations
  import datetime
  from typing import Callable
  import pytest
  from sqlalchemy.orm import eagerload
  from airflow import models
  from airflow.api.common.mark_tasks import _create_dagruns, _DagRunInfo, set_dag_run_state_to_failed, set_dag_run_state_to_queued, set_dag_run_state_to_running, set_dag_run_state_to_success, set_state
  from airflow.models import DagRun
  from airflow.utils import timezone
  from airflow.utils.session import create_session, provide_session
  from airflow.utils.state import State
  from airflow.utils.types import DagRunType
  from tests.test_utils.db import clear_db_runs
  from tests.test_utils.mapping import expand_mapped_task
label_desc: Use image node_id 9 for calling the TestMarkTasks obj's underlying member method code with example usage: obj.test_mark_tasks_past() without return types