'Creating a L{MessageSet} with a single L{None}, representing
C{*}, adds C{*} to the range; its serialized form includes
only C{*}, its length is one, but it cannot be iterated over
because its endpoint is unknown.'

def test_createWithSingleWildcard(self):

    m = MessageSet(None)
    self.assertEqual(str(m), '*')
    self.assertEqual(len(m), 1)
    self.assertRaises(TypeError, list, m)
