'Only a single L{Environment} can extract inherited file descriptors.'

def test_secondEnvironment(self):

    fakeEnvironment = self.initializeEnvironment(3, os.getpid())
    first = ListenFDs.fromEnvironment(environ=fakeEnvironment)
    second = ListenFDs.fromEnvironment(environ=fakeEnvironment)
    self.assertEqual(list(range(3, 6)), first.inheritedDescriptors())
    self.assertEqual([], second.inheritedDescriptors())
