async def test_statistics(self):
async def waiter():
await event.wait()
event = Event()
async with create_task_group() as tg:
assert event.statistics().tasks_waiting == 0
for i in range(1, 3):
tg.start_soon(waiter)
await wait_all_tasks_blocked()
assert event.statistics().tasks_waiting == i
event.set()
assert event.statistics().tasks_waiting == 0
async def test_event_cancel(self):
async def task():
nonlocal task_started, event_set
task_started = True
await event.wait()
event_set = True
task_started = event_set = False
event = Event()
async with create_task_group() as tg:
tg.start_soon(task)
tg.cancel_scope.cancel()
event.set()
assert task_started
assert not event_set
