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# Copyright (C) 2023 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
'''Test cases for QtAsyncio'''
import unittest
import asyncio
import threading
import time
from PySide6.QtAsyncio import QAsyncioEventLoopPolicy
class QAsyncioTestCaseThreadsafe(unittest.TestCase):
def setUp(self) -> None:
super().setUp()
asyncio.set_event_loop_policy(QAsyncioEventLoopPolicy())
self.loop_event = asyncio.Event()
def thread_target(self, is_threadsafe):
time.sleep(1)
if is_threadsafe:
# call_soon_threadsafe() wakes the loop that is in another thread, so the
# loop checks the event and will not hang.
asyncio.get_event_loop().call_soon_threadsafe(self.loop_event.set)
else:
# call_soon() does not wake the loop that is in another thread, and so the
# loop keeps waiting without checking the event and will hang.
asyncio.get_event_loop().call_soon(self.loop_event.set)
async def coro(self, is_threadsafe):
thread = threading.Thread(target=self.thread_target, args=(is_threadsafe,))
thread.start()
task = asyncio.create_task(self.loop_event.wait())
# The timeout is necessary because the loop will hang for the non-threadsafe case.
done, pending = await asyncio.wait([task], timeout=2)
thread.join()
if is_threadsafe:
self.assertEqual(len(done), 1)
self.assertEqual(len(pending), 0)
else:
self.assertEqual(len(done), 0)
self.assertEqual(len(pending), 1)
def test_not_threadsafe(self):
asyncio.run(self.coro(False))
def test_threadsafe(self):
asyncio.run(self.coro(True))
if __name__ == '__main__':
unittest.main()
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