def test_consecutive_failures(self):
'''Verify that a task is unhealthy only after max_consecutive_failures is exceeded'''
initial_interval_secs = 2
interval_secs = 1
self.expect_health_check(False, num_calls=2)
self.expect_health_check(True)
self.expect_health_check(False, num_calls=3)
self.replay()
hct = HealthCheckerThread(
self._checker,
interval_secs=interval_secs,
initial_interval_secs=initial_interval_secs,
max_consecutive_failures=2,
clock=self._clock)
hct.start()
# 2 consecutive health check failures followed by a successful health check.
self._clock.tick(initial_interval_secs)
assert hct.status is None
self._clock.tick(interval_secs)
assert hct.status is None
self._clock.tick(interval_secs)
assert hct.status is None
# 3 consecutive health check failures.
self._clock.tick(interval_secs)
assert hct.status is None
self._clock.tick(interval_secs)
assert hct.status is None
self._clock.tick(interval_secs)
thread_yield()
assert hct.status is not None
hct.stop()
self.verify()
def test_initial_interval_whatev(self):
self.expect_health_check(False)
self.replay()
hct = HealthCheckerThread(
self._checker,
interval_secs=5,
initial_interval_secs=0,
clock=self._clock)
hct.start()
assert hct.status is not None
hct.stop()
self.verify()
def test_initial_interval_whatev(self):
self.expect_health_check(False)
self.replay()
hct = HealthCheckerThread(
self._checker,
interval_secs=5,
initial_interval_secs=0,
clock=self._clock)
hct.start()
assert hct.status.status == TaskState.Value('TASK_FAILED')
hct.stop()
self.verify()
def test_initial_interval_2x(self): self.expect_health_check(False) self.replay() hct = HealthCheckerThread(self._checker, interval_secs=5, clock=self._clock) hct.start() thread_yield() assert hct.status is None self._clock.tick(6) assert hct.status is None self._clock.tick(3) assert hct.status is None self._clock.tick(5) thread_yield() assert hct.status is not None hct.stop() self.verify()