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import asyncio
import os
import threading
import unittest
from datetime import datetime, timedelta
import pytest
from reactivex.scheduler.eventloop import AsyncIOThreadSafeScheduler
CI = os.getenv("CI") is not None
class TestAsyncIOThreadSafeScheduler(unittest.TestCase):
@pytest.mark.skipif(CI, reason="Flaky test in GitHub Actions")
def test_asyncio_threadsafe_schedule_now(self):
loop = asyncio.get_event_loop()
scheduler = AsyncIOThreadSafeScheduler(loop)
diff = scheduler.now - datetime.utcfromtimestamp(loop.time())
assert abs(diff) < timedelta(milliseconds=2)
@pytest.mark.skipif(CI, reason="Flaky test in GitHub Actions")
def test_asyncio_threadsafe_schedule_now_units(self):
loop = asyncio.get_event_loop()
scheduler = AsyncIOThreadSafeScheduler(loop)
diff = scheduler.now
yield from asyncio.sleep(0.1)
diff = scheduler.now - diff
assert timedelta(milliseconds=80) < diff < timedelta(milliseconds=180)
def test_asyncio_threadsafe_schedule_action(self):
loop = asyncio.get_event_loop()
async def go():
scheduler = AsyncIOThreadSafeScheduler(loop)
ran = False
def action(scheduler, state):
nonlocal ran
ran = True
def schedule():
scheduler.schedule(action)
threading.Thread(target=schedule).start()
await asyncio.sleep(0.1)
assert ran is True
loop.run_until_complete(go())
def test_asyncio_threadsafe_schedule_action_due(self):
loop = asyncio.get_event_loop()
async def go():
scheduler = AsyncIOThreadSafeScheduler(loop)
starttime = loop.time()
endtime = None
def action(scheduler, state):
nonlocal endtime
endtime = loop.time()
def schedule():
scheduler.schedule_relative(0.2, action)
threading.Thread(target=schedule).start()
await asyncio.sleep(0.3)
assert endtime is not None
diff = endtime - starttime
assert diff > 0.18
loop.run_until_complete(go())
def test_asyncio_threadsafe_schedule_action_cancel(self):
loop = asyncio.get_event_loop()
async def go():
ran = False
scheduler = AsyncIOThreadSafeScheduler(loop)
def action(scheduler, state):
nonlocal ran
ran = True
def schedule():
d = scheduler.schedule_relative(0.05, action)
d.dispose()
threading.Thread(target=schedule).start()
await asyncio.sleep(0.3)
assert ran is False
loop.run_until_complete(go())
def cancel_same_thread_common(self, test_body):
update_state = {"ran": False, "dispose_completed": False}
def action(scheduler, state):
update_state["ran"] = True
# Make the actual test body run in deamon thread, so that in case of
# failure it doesn't hang indefinitely.
def thread_target():
loop = asyncio.new_event_loop()
scheduler = AsyncIOThreadSafeScheduler(loop)
test_body(scheduler, action, update_state)
async def go():
await asyncio.sleep(0.2)
loop.run_until_complete(go())
thread = threading.Thread(target=thread_target)
thread.daemon = True
thread.start()
thread.join(0.3)
assert update_state["dispose_completed"] is True
assert update_state["ran"] is False
def test_asyncio_threadsafe_cancel_non_relative_same_thread(self):
def test_body(scheduler, action, update_state):
d = scheduler.schedule(action)
# Test case when dispose is called on thread on which loop is not
# yet running, and non-relative schedele is used.
d.dispose()
update_state["dispose_completed"] = True
self.cancel_same_thread_common(test_body)
def test_asyncio_threadsafe_schedule_action_cancel_same_thread(self):
def test_body(scheduler, action, update_state):
d = scheduler.schedule_relative(0.05, action)
# Test case when dispose is called on thread on which loop is not
# yet running, and relative schedule is used.
d.dispose()
update_state["dispose_completed"] = True
self.cancel_same_thread_common(test_body)
def test_asyncio_threadsafe_schedule_action_cancel_same_loop(self):
def test_body(scheduler, action, update_state):
d = scheduler.schedule_relative(0.1, action)
def do_dispose():
d.dispose()
update_state["dispose_completed"] = True
# Test case when dispose is called in loop's callback.
scheduler._loop.call_soon(do_dispose)
self.cancel_same_thread_common(test_body)
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