193 lines
4.4 KiB
Python
193 lines
4.4 KiB
Python
'''
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The most hipster way to force SC onto the stdlib's "async".
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'''
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from typing import Optional
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import asyncio
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import builtins
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import importlib
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import pytest
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import trio
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import tractor
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from tractor import RemoteActorError
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async def sleep_and_err():
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await asyncio.sleep(0.1)
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assert 0
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async def sleep_forever():
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await asyncio.sleep(float('inf'))
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async def trio_cancels_single_aio_task():
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# spawn an ``asyncio`` task to run a func and return result
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with trio.move_on_after(.2):
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await tractor.to_asyncio.run_task(sleep_forever)
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def test_trio_cancels_aio_on_actor_side(arb_addr):
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'''
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Spawn an infected actor that is cancelled by the ``trio`` side
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task using std cancel scope apis.
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'''
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async def main():
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async with tractor.open_nursery(
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arbiter_addr=arb_addr
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) as n:
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await n.run_in_actor(
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trio_cancels_single_aio_task,
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infect_asyncio=True,
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)
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trio.run(main)
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async def asyncio_actor(
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target: str,
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expect_err: Optional[Exception] = None
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) -> None:
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assert tractor.current_actor().is_infected_aio()
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target = globals()[target]
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if '.' in expect_err:
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modpath, _, name = expect_err.rpartition('.')
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mod = importlib.import_module(modpath)
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error_type = getattr(mod, name)
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else: # toplevel builtin error type
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error_type = builtins.__dict__.get(expect_err)
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try:
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# spawn an ``asyncio`` task to run a func and return result
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await tractor.to_asyncio.run_task(target)
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except BaseException as err:
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if expect_err:
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assert isinstance(err, error_type)
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raise err
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def test_aio_simple_error(arb_addr):
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'''
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Verify a simple remote asyncio error propagates back through trio
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to the parent actor.
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'''
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async def main():
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async with tractor.open_nursery(
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arbiter_addr=arb_addr
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) as n:
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await n.run_in_actor(
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asyncio_actor,
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target='sleep_and_err',
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expect_err='AssertionError',
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infect_asyncio=True,
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)
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with pytest.raises(RemoteActorError) as excinfo:
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trio.run(main)
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err = excinfo.value
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assert isinstance(err, RemoteActorError)
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assert err.type == AssertionError
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def test_tractor_cancels_aio(arb_addr):
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'''
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Verify we can cancel a spawned asyncio task gracefully.
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'''
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async def main():
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async with tractor.open_nursery() as n:
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portal = await n.run_in_actor(
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asyncio_actor,
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target='sleep_forever',
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expect_err='trio.Cancelled',
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infect_asyncio=True,
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)
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# cancel the entire remote runtime
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await portal.cancel_actor()
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trio.run(main)
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def test_trio_cancels_aio(arb_addr):
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'''
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Much like the above test with ``tractor.Portal.cancel_actor()``
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except we just use a standard ``trio`` cancellation api.
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'''
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async def main():
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with trio.move_on_after(1):
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# cancel the nursery shortly after boot
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async with tractor.open_nursery() as n:
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# debug_mode=True
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# ) as n:
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portal = await n.run_in_actor(
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asyncio_actor,
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target='sleep_forever',
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expect_err='trio.Cancelled',
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infect_asyncio=True,
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)
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trio.run(main)
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async def aio_cancel():
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''''Cancel urself boi.
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'''
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await asyncio.sleep(0.5)
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task = asyncio.current_task()
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# cancel and enter sleep
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task.cancel()
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await sleep_forever()
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def test_aio_cancelled_from_aio_causes_trio_cancelled(arb_addr):
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async def main():
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async with tractor.open_nursery() as n:
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portal = await n.run_in_actor(
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asyncio_actor,
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target='aio_cancel',
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expect_err='asyncio.CancelledError',
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infect_asyncio=True,
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)
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# with trio.CancelScope(shield=True):
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await portal.result()
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with pytest.raises(RemoteActorError) as excinfo:
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trio.run(main)
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def test_trio_error_cancels_aio(arb_addr):
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...
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def test_basic_interloop_channel_stream(arb_addr):
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...
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def test_trio_cancels_and_channel_exits(arb_addr):
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...
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def test_aio_errors_and_channel_propagates(arb_addr):
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...
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