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      1 # Copyright (C) Internet Systems Consortium, Inc. ("ISC")
      2 #
      3 # SPDX-License-Identifier: MPL-2.0
      4 #
      5 # This Source Code Form is subject to the terms of the Mozilla Public
      6 # License, v. 2.0.  If a copy of the MPL was not distributed with this
      7 # file, you can obtain one at https://mozilla.org/MPL/2.0/.
      8 #
      9 # See the COPYRIGHT file distributed with this work for additional
     10 # information regarding copyright ownership.
     11 
     12 import dns.rcode
     13 
     14 import isctest
     15 
     16 
     17 def attempt_query(ns):
     18     ns.rndc("flush")
     19     msg = isctest.query.create("foo.example.", "A")
     20     res = isctest.query.udp(msg, ns.ip)
     21     if msg.rcode() == dns.rcode.NOERROR:
     22         return len(res.answer) == 1
     23     return False
     24 
     25 
     26 def test_randomizens(ns6):
     27     resolved = False
     28     for _ in range(1, 25):
     29         if attempt_query(ns6):
     30             resolved = True
     31             break
     32     assert resolved
     33