X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/d9eca6c665e600063cb2c04b17f38d540eb438f1..de34089011627304e8e7588def5f6848311a9843:/services/nodemanager/tests/test_clientactor.py

diff --git a/services/nodemanager/tests/test_clientactor.py b/services/nodemanager/tests/test_clientactor.py
index 1e4c40ec6b..57a0d32d06 100644
--- a/services/nodemanager/tests/test_clientactor.py
+++ b/services/nodemanager/tests/test_clientactor.py
@@ -64,6 +64,31 @@ class RemotePollLoopActorTestCase(testutil.RemotePollLoopActorTestMixin,
                         "poll loop died from dead subscriber")
         self.subscriber.assert_called_with('survive2')
 
+    def check_poll_timers(self, *test_times):
+        schedule_mock = self.timer.schedule
+        last_expect = None
+        with mock.patch('time.time') as time_mock:
+            for fake_time, expect_next in test_times:
+                time_mock.return_value = fake_time
+                self.monitor.poll(last_expect).get(self.TIMEOUT)
+                self.assertTrue(schedule_mock.called)
+                self.assertEqual(expect_next, schedule_mock.call_args[0][0])
+                schedule_mock.reset_mock()
+                last_expect = expect_next
+
+    def test_poll_timing_on_consecutive_successes_with_drift(self):
+        self.build_monitor(['1', '2'], poll_wait=3, max_poll_wait=14)
+        self.check_poll_timers((0, 3), (4, 6))
+
+    def test_poll_backoff_on_failures(self):
+        self.build_monitor(self.MockClientError, poll_wait=3, max_poll_wait=14)
+        self.check_poll_timers((0, 6), (6, 18), (18, 32))
+
+    def test_poll_timing_after_error_recovery(self):
+        self.build_monitor(['a', self.MockClientError(), 'b'],
+                           poll_wait=3, max_poll_wait=14)
+        self.check_poll_timers((0, 3), (4, 10), (10, 13))
+
     def test_no_subscriptions_by_key_without_support(self):
         self.build_monitor([])
         with self.assertRaises(AttributeError):