text: from beaker.middleware import SessionMiddleware
  from beaker.session import Session
  from nose.tools import *
  import datetime
  import re
  
  def test_cookie_expires():
      """Explore valid arguments for cookie_expires."""
      def app(*args, **kw):
          pass
  
      key = 'beaker.session.cookie_expires'
      now = datetime.datetime.now()
  
      values = ['300', 300,
          True,  'True',  'true',  't',
          False, 'False', 'false', 'f',
          datetime.timedelta(minutes=5), now]
  
      expected = [datetime.timedelta(seconds=300),
              datetime.timedelta(seconds=300), 
              True, True, True, True,
              False, False, False, False,
              datetime.timedelta(minutes=5), now]
  
      actual = []
  
      for pos, v in enumerate(values):
          try:
              s = SessionMiddleware(app, config={key:v})
              val = s.options['cookie_expires']
          except:
              val = None
          assert_equal(val, expected[pos])
  
  
  def test_cookie_exprires_2():
      """Exhibit Set-Cookie: values."""
      expires = Session(
              {}, cookie_expires=True
              ).cookie.output()
  
      assert re.match('Set-Cookie: beaker.session.id=[0-9a-f]{32}; Path=/', expires), expires
      no_expires = Session(
              {}, cookie_expires=False
              ).cookie.output()
  
      assert re.match('Set-Cookie: beaker.session.id=[0-9a-f]{32}; expires=(Mon|Tue), 1[89]-Jan-2038 [0-9:]{8} GMT; Path=/', no_expires), no_expires
  
  