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import asyncio
from aioredis.locks import Lock
async def test_finished_waiter_cancelled():
lock = Lock()
ta = asyncio.ensure_future(lock.acquire())
await asyncio.sleep(0)
assert lock.locked()
tb = asyncio.ensure_future(lock.acquire())
await asyncio.sleep(0)
assert len(lock._waiters) == 1
# Create a second waiter, wake up the first, and cancel it.
# Without the fix, the second was not woken up and the lock
# will never be locked
asyncio.ensure_future(lock.acquire())
await asyncio.sleep(0)
lock.release()
tb.cancel()
await asyncio.sleep(0)
assert ta.done()
assert tb.cancelled()
await asyncio.sleep(0)
assert lock.locked()
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