text: """
  Logging module tests.
  """
  import os
  
  from osbrain import run_agent
  from osbrain import run_logger
  from osbrain.logging import pyro_log
  from osbrain.helper import logger_received
  
  from common import nsproxy  # noqa: F401
  
  
  def test_logging_level(nsproxy):
      """
      Logging with different log levels should result in different logs being
      filled.
      """
      agent = run_agent('agent')
      agent.set_attr(_DEBUG=True)
      logger = run_logger('logger')
      agent.set_logger(logger)
      i = 0
      while not len(logger.get_attr('log_history')):
          i += 1
          agent.log_info(i)
      assert logger_received(logger, message=r'\): %s' % i, position=-1)
      before = len(logger.get_attr('log_history'))
      agent.log_info('some information')
      agent.log_warning('some warning')
      agent.log_error('some error')
      agent.log_debug('some debug')
      # Log values
      assert logger_received(logger, 'some information', 'log_history_info', -1)
      assert logger_received(logger, 'some warning', 'log_history_warning', -1)
      assert logger_received(logger, 'some error', 'log_history_error', -1)
      assert logger_received(logger, 'some debug', 'log_history_debug', -1)
      # Log sizes
      assert len(logger.get_attr('log_history_info')) == 1 + before
      assert len(logger.get_attr('log_history_warning')) == 1
      assert len(logger.get_attr('log_history_error')) == 1
      assert len(logger.get_attr('log_history_debug')) == 1
  
  
  def test_pyro_log():
      """
      Calling the pyro_log function should set some environment variables to
      start Pyro logging into a file.
      """
      assert os.environ.get('PYRO_LOGFILE', None) is None
      assert os.environ.get('PYRO_LOGLEVEL', None) is None
      pyro_log()
      assert os.environ.get('PYRO_LOGFILE', None) == 'pyro_osbrain.log'
      assert os.environ.get('PYRO_LOGLEVEL', None) == 'DEBUG'
      del os.environ['PYRO_LOGFILE']
      del os.environ['PYRO_LOGLEVEL']
  