async def main():
promise = Promise()
assert not promise.is_set()
producer_task = await curio.spawn(producer(promise))
assert 42 == await consumer(promise)
assert promise.is_set()
async def main():
promise = Promise()
producer_task = await curio.spawn(exception_producer(promise))
with pytest.raises(RuntimeError):
await consumer(promise)
await producer_task.join()
async def main():
promise = Promise()
assert not promise.is_set()
assert repr(promise).endswith('[unset]>')
await promise.set(42)
assert promise.is_set()
assert promise._data == 42
assert promise._exception is None
assert repr(promise).endswith('[42]>')
promise.clear()
assert not promise.is_set()
assert promise._data is None
assert promise._exception is None
assert repr(promise).endswith('[unset]>')
async with promise:
raise RuntimeError()
assert promise.is_set()
assert promise._data is None
assert isinstance(promise._exception, RuntimeError)
assert repr(promise).endswith('[RuntimeError()]>')
promise.clear()
assert not promise.is_set()
assert promise._data is None
assert promise._exception is None
assert repr(promise).endswith('[unset]>')
async def main():
promise = Promise()
async with promise:
pass
assert not promise.is_set()