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# Copyright (C) 2024 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 asyncio
import unittest
import PySide6.QtAsyncio as QtAsyncio
class QAsyncioTestCaseCancelTaskGroup(unittest.TestCase):
def setUp(self) -> None:
super().setUp()
# We only reach the end of the loop if the task is not cancelled.
self.loop_end_reached = False
async def raise_error(self):
raise RuntimeError
async def loop_short(self):
self._loop_end_reached = False
for _ in range(1000):
await asyncio.sleep(1e-3)
self._loop_end_reached = True
async def loop_shorter(self):
self._loop_end_reached = False
for _ in range(1000):
await asyncio.sleep(1e-4)
self._loop_end_reached = True
async def loop_the_shortest(self):
self._loop_end_reached = False
for _ in range(1000):
await asyncio.to_thread(lambda: None)
self._loop_end_reached = True
async def main(self, coro):
async with asyncio.TaskGroup() as tg:
tg.create_task(coro())
tg.create_task(self.raise_error())
def test_cancel_taskgroup(self):
coros = [self.loop_short, self.loop_shorter, self.loop_the_shortest]
for coro in coros:
try:
QtAsyncio.run(self.main(coro), keep_running=False)
except ExceptionGroup as e:
self.assertEqual(len(e.exceptions), 1)
self.assertIsInstance(e.exceptions[0], RuntimeError)
self.assertFalse(self._loop_end_reached)
if __name__ == '__main__':
unittest.main()
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