'If the process environment is not explicitly passed to
L{Environment.__init__}, the real process environment dictionary is
used.'

def test_defaultEnviron(self):

    self.patch(os, 'environ', {'LISTEN_PID': str(os.getpid()), 'LISTEN_FDS': '5'})
    sddaemon = ListenFDs.fromEnvironment()
    self.assertEqual(list(range(3, (3 + 5))), sddaemon.inheritedDescriptors())
