old_contents: # -*- coding: utf-8 -*-
  #
  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you under the Apache License, Version 2.0 (the
  # "License"); you may not use this file except in compliance
  # with the License.  You may obtain a copy of the License at
  #
  #   http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing,
  # software distributed under the License is distributed on an
  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, either express or implied.  See the License for the
  # specific language governing permissions and limitations
  # under the License.
  
  from airflow.models import DAG
  from airflow.operators.python_operator import PythonOperator
  from datetime import datetime
  
  # AIRFLOW-1893 - Originally, impersonation tests were incomplete missing the use case when
  # DAGs access custom packages usually made available through the PYTHONPATH environment
  # variable. This file includes a DAG that imports a custom package made available and if
  # run via the previous implementation of impersonation, will fail by not being able to
  # import the custom package.
  # This DAG is used to test that impersonation propagates the PYTHONPATH environment
  # variable correctly.
  from tests.test_utils.fake_datetime import FakeDatetime
  
  DEFAULT_DATE = datetime(2016, 1, 1)
  
  args = {
      'owner': 'airflow',
      'start_date': DEFAULT_DATE,
      'run_as_user': 'airflow_test_user'
  }
  
  dag = DAG(dag_id='impersonation_with_custom_pkg', default_args=args)
  
  
  def print_today():
      dt = FakeDatetime.utcnow()
      print('Today is {}'.format(dt.strftime('%Y-%m-%d')))
  
  
  def check_hive_conf():
      from airflow import configuration as conf
      assert conf.get('hive', 'default_hive_mapred_queue') == 'airflow'
  
  
  PythonOperator(
      python_callable=print_today,
      task_id='exec_python_fn',
      dag=dag)
  
  PythonOperator(
      python_callable=check_hive_conf,
      task_id='exec_check_hive_conf_fn',
      dag=dag)
  
new_contents: # -*- coding: utf-8 -*-
  #
  # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you under the Apache License, Version 2.0 (the
  # "License"); you may not use this file except in compliance
  # with the License.  You may obtain a copy of the License at
  #
  #   http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing,
  # software distributed under the License is distributed on an
  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, either express or implied.  See the License for the
  # specific language governing permissions and limitations
  # under the License.
  
  from airflow.models import DAG
  from airflow.operators.python_operator import PythonOperator
  from datetime import datetime
  
  # AIRFLOW-1893 - Originally, impersonation tests were incomplete missing the use case when
  # DAGs access custom packages usually made available through the PYTHONPATH environment
  # variable. This file includes a DAG that imports a custom package made available and if
  # run via the previous implementation of impersonation, will fail by not being able to
  # import the custom package.
  # This DAG is used to test that impersonation propagates the PYTHONPATH environment
  # variable correctly.
  from fake_datetime import FakeDatetime
  
  DEFAULT_DATE = datetime(2016, 1, 1)
  
  args = {
      'owner': 'airflow',
      'start_date': DEFAULT_DATE,
      'run_as_user': 'airflow_test_user'
  }
  
  dag = DAG(dag_id='impersonation_with_custom_pkg', default_args=args)
  
  
  def print_today():
      dt = FakeDatetime.utcnow()
      print('Today is {}'.format(dt.strftime('%Y-%m-%d')))
  
  
  def check_hive_conf():
      from airflow import configuration as conf
      assert conf.get('hive', 'default_hive_mapred_queue') == 'airflow'
  
  
  PythonOperator(
      python_callable=print_today,
      task_id='exec_python_fn',
      dag=dag)
  
  PythonOperator(
      python_callable=check_hive_conf,
      task_id='exec_check_hive_conf_fn',
      dag=dag)
  
subject: Fix flaky impersonation (#6098)