'L{xmpp_stringprep.crippled} is deprecated and always returns C{False}.'

def test_crippled(self):

    from twisted.words.protocols.jabber.xmpp_stringprep import crippled
    warnings = self.flushWarnings(offendingFunctions=[self.test_crippled])
    self.assertEqual(DeprecationWarning, warnings[0]['category'])
    self.assertEqual('twisted.words.protocols.jabber.xmpp_stringprep.crippled    was    deprecated    in    Twisted    13.1.0:    crippled    is    always    False', warnings[0]['message'])
    self.assertEqual(1, len(warnings))
    self.assertEqual(crippled, False)
