text: # Copyright (c) 2017-2022 The Molecular Sciences Software Institute, Virginia Tech
  #
  # Redistribution and use in source and binary forms, with or without
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  # notice, this list of conditions and the following disclaimer.
  #
  # 2. Redistributions in binary form must reproduce the above copyright
  # notice, this list of conditions and the following disclaimer in the
  # documentation and/or other materials provided with the distribution.
  #
  # 3. Neither the name of the copyright holder nor the names of its
  # contributors may be used to endorse or promote products derived
  # from this software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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  import pytest
  
  
  def pytest_addoption(parser):
      parser.addoption("--runslow", action="store_true", default=False, help="Run thorough, but much slower, tests")
  
  
  def pytest_collection_modifyitems(config, items):
      if config.getoption("--runslow"):
          return
  
      skip_slow = pytest.mark.skip(reason="Skipping slow test without --runslow option")
      for item in items:
          if "slow" in item.keywords:
              item.add_marker(skip_slow)
  
  
  def pytest_ignore_collect(path, config):
      if config.getoption("--runslow"):
          return False
      else:
          return str(path).endswith('_slow.py')
  