'The CHANNELLEN support parameter is parsed into an integer value
indicating the maximum channel name length, otherwise, if the
parameter is missing or invalid, the default value (as specified by
RFC 1459) is used.'

def test_support_CHANNELLEN(self):

    default = irc.ServerSupportedFeatures()._features['CHANNELLEN']
    self._testIntOrDefaultFeature('CHANNELLEN', default)
