docstr: this test tests the helper class '_UpstreamTIStates' as a unit and inside update_state
code: def test_UpstreamTIStates(self, session, dag_maker):
      """
      this test tests the helper class '_UpstreamTIStates' as a unit and inside update_state
      """
      with dag_maker(session=session):
          op1 = EmptyOperator(task_id="op1")
          op2 = EmptyOperator(task_id="op2")
          op3 = EmptyOperator(task_id="op3")
          op4 = EmptyOperator(task_id="op4")
          op5 = EmptyOperator(
              task_id="op5", trigger_rule=TriggerRule.ONE_FAILED
          )
  
          op1 >> (op2, op3) >> op4
          (op2, op3, op4) >> op5
  
      dr = dag_maker.create_dagrun()
      tis = {ti.task_id: ti for ti in dr.task_instances}
  
      tis["op1"].state = TaskInstanceState.SUCCESS
      tis["op2"].state = TaskInstanceState.FAILED
      tis["op3"].state = TaskInstanceState.SUCCESS
      tis["op4"].state = TaskInstanceState.SUCCESS
      tis["op5"].state = TaskInstanceState.SUCCESS
  
      def _get_finished_tis(task_id: str) -> Iterator[TaskInstance]:
          return (
              ti
              for ti in tis.values()
              if ti.task_id in tis[task_id].task.upstream_task_ids
          )
  
      # check handling with cases that tasks are triggered from backfill with no finished tasks
      assert _UpstreamTIStates.calculate(_get_finished_tis("op2")) == (
          1,
          0,
          0,
          0,
          0,
          1,
          0,
          0,
      )
      assert _UpstreamTIStates.calculate(_get_finished_tis("op4")) == (
          1,
          0,
          1,
          0,
          0,
          2,
          0,
          0,
      )
      assert _UpstreamTIStates.calculate(_get_finished_tis("op5")) == (
          2,
          0,
          1,
          0,
          0,
          3,
          0,
          0,
      )
  
      dr.update_state(session=session)
      assert dr.state == DagRunState.SUCCESS
  
imports: from __future__ import annotations
  from datetime import datetime
  from typing import TYPE_CHECKING, Iterator
  from unittest import mock
  from unittest.mock import Mock
  import pytest
  from airflow.decorators import task, task_group
  from airflow.models.baseoperator import BaseOperator
  from airflow.models.taskinstance import TaskInstance
  from airflow.operators.empty import EmptyOperator
  from airflow.ti_deps.dep_context import DepContext
  from airflow.ti_deps.deps.trigger_rule_dep import TriggerRuleDep, _UpstreamTIStates
  from airflow.utils.state import DagRunState, TaskInstanceState
  from airflow.utils.trigger_rule import TriggerRule
label_desc: Use image node_id 34 for calling the TestTriggerRuleDep obj's underlying member method code with example usage: obj.test_UpstreamTIStates(session, dag_maker) and returns: unknown