services/nodemanager/tests/test_clientactor.py

   1 #!/usr/bin/env python
   2
   3 from __future__ import absolute_import, print_function
   4
   5 import unittest
   6
   7 import mock
   8 import pykka
   9
  10 import arvnodeman.clientactor as clientactor
  11 from . import testutil
  12
  13 class RemotePollLoopActorTestCase(testutil.RemotePollLoopActorTestMixin,
  14                                   unittest.TestCase):
  15     class MockClientError(Exception):
  16         pass
  17
  18     class TestActor(clientactor.RemotePollLoopActor):
  19         LOGGER_NAME = 'arvnodeman.testpoll'
  20
  21         def _send_request(self):
  22             return self._client()
  23     TestActor.CLIENT_ERRORS = (MockClientError,)
  24     TEST_CLASS = TestActor
  25
  26
  27     def build_monitor(self, side_effect, *args, **kwargs):
  28         super(RemotePollLoopActorTestCase, self).build_monitor(*args, **kwargs)
  29         self.client.side_effect = side_effect
  30
  31     def test_poll_loop_starts_after_subscription(self):
  32         self.build_monitor(['test1'])
  33         self.monitor.subscribe(self.subscriber).get(self.TIMEOUT)
  34         self.stop_proxy(self.monitor)
  35         self.subscriber.assert_called_with('test1')
  36         self.assertTrue(self.timer.schedule.called)
  37
  38     def test_poll_loop_continues_after_failure(self):
  39         self.build_monitor(self.MockClientError)
  40         self.monitor.subscribe(self.subscriber).get(self.TIMEOUT)
  41         self.assertTrue(self.stop_proxy(self.monitor),
  42                         "poll loop died after error")
  43         self.assertTrue(self.timer.schedule.called,
  44                         "poll loop did not reschedule after error")
  45         self.assertFalse(self.subscriber.called,
  46                          "poll loop notified subscribers after error")
  47
  48     def test_late_subscribers_get_responses(self):
  49         self.build_monitor(['pre_late_test', 'late_test'])
  50         mock_subscriber = mock.Mock(name='mock_subscriber')
  51         self.monitor.subscribe(mock_subscriber).get(self.TIMEOUT)
  52         self.monitor.subscribe(self.subscriber)
  53         self.monitor.poll().get(self.TIMEOUT)
  54         self.stop_proxy(self.monitor)
  55         self.subscriber.assert_called_with('late_test')
  56
  57     def test_survive_dead_subscriptions(self):
  58         self.build_monitor(['survive1', 'survive2'])
  59         dead_subscriber = mock.Mock(name='dead_subscriber')
  60         dead_subscriber.side_effect = pykka.ActorDeadError
  61         self.monitor.subscribe(dead_subscriber)
  62         self.monitor.subscribe(self.subscriber)
  63         self.monitor.poll().get(self.TIMEOUT)
  64         self.assertTrue(self.stop_proxy(self.monitor),
  65                         "poll loop died from dead subscriber")
  66         self.subscriber.assert_called_with('survive2')
  67
  68     def check_poll_timers(self, *test_times):
  69         schedule_mock = self.timer.schedule
  70         last_expect = None
  71         with mock.patch('time.time') as time_mock:
  72             for fake_time, expect_next in test_times:
  73                 time_mock.return_value = fake_time
  74                 self.monitor.poll(last_expect).get(self.TIMEOUT)
  75                 self.assertTrue(schedule_mock.called)
  76                 self.assertEqual(expect_next, schedule_mock.call_args[0][0])
  77                 schedule_mock.reset_mock()
  78                 last_expect = expect_next
  79
  80     def test_poll_timing_on_consecutive_successes_with_drift(self):
  81         self.build_monitor(['1', '2'], poll_wait=3, max_poll_wait=14)
  82         self.check_poll_timers((0, 3), (4, 6))
  83
  84     def test_poll_backoff_on_failures(self):
  85         self.build_monitor(self.MockClientError, poll_wait=3, max_poll_wait=14)
  86         self.check_poll_timers((0, 6), (6, 18), (18, 32))
  87
  88     def test_poll_timing_after_error_recovery(self):
  89         self.build_monitor(['a', self.MockClientError(), 'b'],
  90                            poll_wait=3, max_poll_wait=14)
  91         self.check_poll_timers((0, 3), (4, 10), (10, 13))
  92
  93     def test_no_subscriptions_by_key_without_support(self):
  94         self.build_monitor([])
  95         with self.assertRaises(AttributeError):
  96             self.monitor.subscribe_to('key')
  97
  98
  99 class RemotePollLoopActorWithKeysTestCase(testutil.RemotePollLoopActorTestMixin,
 100                                           unittest.TestCase):
 101     class TestActor(RemotePollLoopActorTestCase.TestActor):
 102         def _item_key(self, item):
 103             return item['key']
 104     TEST_CLASS = TestActor
 105
 106
 107     def build_monitor(self, side_effect, *args, **kwargs):
 108         super(RemotePollLoopActorWithKeysTestCase, self).build_monitor(
 109             *args, **kwargs)
 110         self.client.side_effect = side_effect
 111
 112     def test_key_subscription(self):
 113         self.build_monitor([[{'key': 1}, {'key': 2}]])
 114         self.monitor.subscribe_to(2, self.subscriber).get(self.TIMEOUT)
 115         self.stop_proxy(self.monitor)
 116         self.subscriber.assert_called_with({'key': 2})
 117
 118     def test_survive_dead_key_subscriptions(self):
 119         item = {'key': 3}
 120         self.build_monitor([[item], [item]])
 121         dead_subscriber = mock.Mock(name='dead_subscriber')
 122         dead_subscriber.side_effect = pykka.ActorDeadError
 123         self.monitor.subscribe_to(3, dead_subscriber)
 124         self.monitor.subscribe_to(3, self.subscriber)
 125         self.monitor.poll().get(self.TIMEOUT)
 126         self.assertTrue(self.stop_proxy(self.monitor),
 127                         "poll loop died from dead key subscriber")
 128         self.subscriber.assert_called_with(item)
 129
 130     def test_mixed_subscriptions(self):
 131         item = {'key': 4}
 132         self.build_monitor([[item], [item]])
 133         key_subscriber = mock.Mock(name='key_subscriber')
 134         self.monitor.subscribe(self.subscriber)
 135         self.monitor.subscribe_to(4, key_subscriber)
 136         self.monitor.poll().get(self.TIMEOUT)
 137         self.stop_proxy(self.monitor)
 138         self.subscriber.assert_called_with([item])
 139         key_subscriber.assert_called_with(item)
 140
 141     def test_subscription_to_missing_key(self):
 142         self.build_monitor([[]])
 143         self.monitor.subscribe_to('nonesuch', self.subscriber).get(self.TIMEOUT)
 144         self.stop_proxy(self.monitor)
 145         self.subscriber.assert_called_with(None)
 146
 147
 148 if __name__ == '__main__':
 149     unittest.main()