def test_periodic_task_can_be_stopped(self):
pt = PeriodicTask('Test', 0.5, self._collect_info_task)
pt.start()
sleep(0.01)
pt.stop()
sleep(1)
assert pt.context['count'] == 1
def test_task_can_stop_itself(self):
def auto_stop_task(pt):
pt.stop()
pt.context['count'] += 1
pt = PeriodicTask('Test', 0.5, auto_stop_task)
pt.context['count'] = 0
with self.run_periodic_task_context(pt):
sleep(1)
assert pt.context['count'] == 1
def test_shared_context(self):
def task(pt):
# assert raised inside a task are ignored by pytest, but it'll
# prevent the 2nd value to be set, so the test will fail anyway.
assert pt.context['test #1'] == 9
pt.context['test #2'] = 23
pt = PeriodicTask('Test', 23, task)
pt.context['test #1'] = 9
with self.run_periodic_task_context(pt):
sleep(0.01)
assert pt.context['test #2'] == 23
def test_apply_now(self):
def task(pt):
pt.context['count'] += 1
return pt.context['count']
pt = PeriodicTask('test', 99, task)
pt.context['count'] = 0
with self.run_periodic_task_context(pt):
sleep(0.01)
promise = pt.apply_now()
assert promise.result(0.01) is 2
def test_delay_can_be_changed(self):
pt = PeriodicTask('Test', 0.5, self._collect_info_task)
with self.run_periodic_task_context(pt):
sleep(1.01)
assert pt.context['count'] == 3
pt.context['count'] = 0
pt.delay = 0.1
# Next execution is scheduled at 1.5s from pt.start() (or 500ms
# from now). After that, the new delay will be used, so each 100ms
# for 500ms.
sleep(1)
assert pt.context['count'] == 6
def test_apply_now_with_failure(self):
class MyException(Exception):
pass
def task(pt):
if pt.context['apply_now_mode']:
raise MyException()
pt = PeriodicTask('test', 99, task)
pt.context['apply_now_mode'] = False
with self.run_periodic_task_context(pt):
sleep(0.01)
pt.context['apply_now_mode'] = True
promise = pt.apply_now()
assert isinstance(promise.exception(), MyException)
def test_apply_now_when_task_is_running(self):
def task(pt):
pt.context['count'] += 1
if pt.context['count'] == 1:
# 2nd execution will start just after this one.
pt.context['promise'] = pt.apply_now()
return pt.context['count']
pt = PeriodicTask('test', 99, task)
pt.context['count'] = 0
with self.run_periodic_task_context(pt):
sleep(0.1)
assert pt.context['count'] == 2
assert pt.context['promise'].result(0.01) is 2