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# -*- coding: utf-8 -*-
# Copyright (C) 2015 Yahoo! Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from kazoo import client
from kazoo import exceptions as k_exc
from six.moves import range as compat_range
from taskflow import test
from taskflow.test import mock
from taskflow.utils import kazoo_utils as ku
_FAKE_ZK_VER = (3, 4, 0)
def _iter_succeed_after(attempts):
for i in compat_range(0, attempts):
if i % 2 == 0:
yield ValueError("Broken")
else:
yield AttributeError("Broken")
yield _FAKE_ZK_VER
class KazooUtilTest(test.TestCase):
def test_flakey_version_fetch_fail(self):
m = mock.create_autospec(client.KazooClient, instance=True)
m.server_version.side_effect = _iter_succeed_after(11)
self.assertRaises(k_exc.KazooException,
ku.fetch_server_version, m, 10)
self.assertEqual(10, m.server_version.call_count)
def test_flakey_version_fetch_fail_truncated(self):
m = mock.create_autospec(client.KazooClient, instance=True)
m.server_version.side_effect = [None, [], "", [1]]
self.assertRaises(k_exc.KazooException,
ku.fetch_server_version, m, 4)
self.assertEqual(4, m.server_version.call_count)
def test_flakey_version_fetch_pass(self):
m = mock.create_autospec(client.KazooClient, instance=True)
m.server_version.side_effect = _iter_succeed_after(4)
self.assertEqual((3, 4, 0), ku.fetch_server_version(m, 5))
self.assertEqual(5, m.server_version.call_count)
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