def test_init_with_default_interval(self):
# The service itself calls `check_status` in a thread, via a couple of
# decorators. This indirection makes it clearer to mock
# `cleanup_old_nonces` here and track calls to it.
mock_check_status = self.patch(status_monitor, "check_status")
# Making `deferToDatabase` use the current thread helps testing.
self.patch(status_monitor, "deferToDatabase", maybeDeferred)
service = StatusMonitorService()
# Use a deterministic clock instead of the reactor for testing.
service.clock = Clock()
# The interval is stored as `step` by TimerService,
# StatusMonitorService's parent class.
interval = 60 # seconds.
self.assertEqual(service.step, interval)
# `check_status` is not called before the service is started.
self.assertThat(mock_check_status, MockNotCalled())
# `check_status` is called the moment the service is started.
service.startService()
self.assertThat(mock_check_status, MockCalledOnceWith())
# Advancing the clock by `interval - 1` means that
# `mark_nodes_failed_after_expiring` has still only been called once.
service.clock.advance(interval - 1)
self.assertThat(mock_check_status, MockCalledOnceWith())
# Advancing the clock one more second causes another call to
# `check_status`.
service.clock.advance(1)
self.assertThat(mock_check_status, MockCallsMatch(call(), call()))
def test_interval_can_be_set(self):
interval = self.getUniqueInteger()
service = StatusMonitorService(interval)
self.assertEqual(interval, service.step)