"""
  Hide tristate choice values with mod dependency in y choice.
  
  If tristate choice values depend on symbols set to 'm', they should be
  hidden when the choice containing them is changed from 'm' to 'y'
  (i.e. exclusive choice).
  
  Related Linux commit: fa64e5f6a35efd5e77d639125d973077ca506074
  """
  
  
  def test(conf):
      assert conf.oldaskconfig('config', 'y') == 0
      assert conf.config_contains('expected_config')
      assert conf.stdout_contains('expected_stdout')