def METHOD_NAME(self):
    args = Node()
    maps = Node()
    # check for error with trying to call with no args or map
    with self.assertRaises(Exception):
        conduit.utils.format(pattern= "")
    # check for error with trying to call both styles
    with self.assertRaises(Exception):
        conduit.utils.format(pattern= "",
                             args = args,
                             maps = maps,
                             map_index = 0)