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import unittest
from datetime import datetime, timedelta, timezone
from time import sleep
import pytest
from reactivex.scheduler.eventloop import IOLoopScheduler
tornado = pytest.importorskip("tornado")
from tornado import ioloop # isort: skip
class TestIOLoopScheduler(unittest.TestCase):
def test_ioloop_schedule_now(self):
loop = ioloop.IOLoop.instance()
scheduler = IOLoopScheduler(loop)
diff = scheduler.now - datetime.fromtimestamp(loop.time(), tz=timezone.utc)
assert abs(diff) < timedelta(milliseconds=1)
def test_ioloop_schedule_now_units(self):
loop = ioloop.IOLoop.instance()
scheduler = IOLoopScheduler(loop)
diff = scheduler.now
sleep(0.1)
diff = scheduler.now - diff
assert timedelta(milliseconds=80) < diff < timedelta(milliseconds=180)
def test_ioloop_schedule_action(self):
loop = ioloop.IOLoop.instance()
scheduler = IOLoopScheduler(loop)
ran = False
def action(scheduler, state):
nonlocal ran
ran = True
scheduler.schedule(action)
def done():
assert ran is True
loop.stop()
loop.call_later(0.1, done)
loop.start()
def test_ioloop_schedule_action_due(self):
loop = ioloop.IOLoop.instance()
scheduler = IOLoopScheduler(loop)
starttime = loop.time()
endtime = None
def action(scheduler, state):
nonlocal endtime
endtime = loop.time()
scheduler.schedule_relative(0.2, action)
def done():
assert endtime is not None
diff = endtime - starttime
assert diff > 0.18
loop.stop()
loop.call_later(0.3, done)
loop.start()
def test_ioloop_schedule_action_cancel(self):
loop = ioloop.IOLoop.instance()
ran = False
scheduler = IOLoopScheduler(loop)
def action(scheduler, state):
nonlocal ran
ran = True
d = scheduler.schedule_relative(0.01, action)
d.dispose()
def done():
assert ran is False
loop.stop()
loop.call_later(0.1, done)
loop.start()
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