class_docstr: Tests that EdgeModifiers work when composed with Tasks (either via >>
  or set_upstream styles)
class_docstr_tok: ["Tests","that","EdgeModifiers","work","when","composed","with","Tasks","(","either","via",">",">","or","set_upstream","styles",")"]
docstr: Tests the simple reversed dag with a TaskGroup and a Label
docstr_tok: ["Tests","the","simple","reversed","dag","with","a","TaskGroup","and","a","Label"]
code: def test_simple_reversed_dag(
      self, test_taskgroup_dag, simple_dag_expected_edges
  ):
      """Tests the simple reversed dag with a TaskGroup and a Label"""
      dag, group, (op1, op2, op3, op4) = test_taskgroup_dag
      op4 << group << Label("Label") << op1
      compare_dag_edges(dag_edges(dag), simple_dag_expected_edges)
  
imports: from __future__ import annotations
  from datetime import datetime, timedelta
  import pytest
  from airflow.models.dag import DAG
  from airflow.models.xcom_arg import XComArg
  from airflow.operators.empty import EmptyOperator
  from airflow.operators.python import PythonOperator
  from airflow.utils.edgemodifier import Label
  from airflow.utils.task_group import TaskGroup
  from airflow.www.views import dag_edges
label_desc: Use image node_id 10 for calling the TestEdgeModifierBuilding obj's underlying member method code with example usage: obj.test_simple_reversed_dag(test_taskgroup_dag, simple_dag_expected_edges) without return types