old_contents: # Copyright 2018 Google LLC
  #
  # Licensed 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
  #
  #     https://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.
  
  import sys
  
  import pytest
  
  from . import unit_testing
  
  
  @pytest.mark.skipif(sys.version_info >= (3, 0), reason="requires Python 2")
  def test_dag_import():
      """Test that the DAG file can be successfully imported.
  
      This tests that the DAG can be parsed, but does not run it in an Airflow
      environment. This is a recommended sanity check by the official Airflow
      docs: https://airflow.incubator.apache.org/tutorial.html#testing
      """
      from . import pythonvirtualenvoperator_python2 as module
      unit_testing.assert_has_valid_dag(module)
  
new_contents: # Copyright 2018 Google LLC
  #
  # Licensed 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
  #
  #     https://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.
  
  import sys
  
  import pytest
  
  from . import unit_testing
  
  
  def test_dag_import():
      """Test that the DAG file can be successfully imported.
  
      This tests that the DAG can be parsed, but does not run it in an Airflow
      environment. This is a recommended sanity check by the official Airflow
      docs: https://airflow.incubator.apache.org/tutorial.html#testing
      """
      from . import pythonvirtualenvoperator_python2 as module
      unit_testing.assert_has_valid_dag(module)
  
subject: Test pythonvirtualenvoperator sample in Python 3. (#1714)