Add a multi-task subscriber test
In combination with `.aclose()`-ing the async gen instance returned from `Portal.run()` this demonstrates the python bug: https://bugs.python.org/issue32526 I've commented out the line that triggers the bug for now since this case provides motivation for adding our own `trio.abc.ReceiveMemoryChannel` implementation to be used instead of async gens directly (returned from `Portal.run()`) since the latter is **not** task safe.trio_memchans
Tyler Goodlet
parent
61680b3729
commit
41c202db68
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@ -4,7 +4,6 @@ from itertools import cycle
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import pytest
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import trio
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import tractor
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from async_generator import aclosing
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from tractor.testing import tractor_test
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@ -30,10 +29,10 @@ def is_even(i):
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@tractor.msg.pub
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async def pubber(get_topics):
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async def pubber(get_topics, seed=10):
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ss = tractor.current_actor().statespace
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for i in cycle(range(10)):
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for i in cycle(range(seed)):
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# ensure topic subscriptions are as expected
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ss['get_topics'] = get_topics
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@ -42,7 +41,11 @@ async def pubber(get_topics):
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await trio.sleep(0.1)
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async def subs(which, pub_actor_name):
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async def subs(
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which, pub_actor_name, seed=10,
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portal=None,
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task_status=trio.TASK_STATUS_IGNORED,
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):
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if len(which) == 1:
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if which[0] == 'even':
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pred = is_even
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@ -54,11 +57,43 @@ async def subs(which, pub_actor_name):
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return isinstance(i, int)
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async with tractor.find_actor(pub_actor_name) as portal:
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agen = await portal.run(__name__, 'pubber', topics=which)
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async with aclosing(agen) as agen:
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agen = await portal.run(
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__name__, 'pubber',
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topics=which,
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seed=seed,
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)
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task_status.started(agen)
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times = 10
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count = 0
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await agen.__anext__()
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async for pkt in agen:
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for topic, value in pkt.items():
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assert pred(value)
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count += 1
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if count >= times:
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break
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await agen.aclose()
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agen = await portal.run(
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__name__, 'pubber',
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topics=['odd'],
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seed=seed,
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)
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await agen.__anext__()
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count = 0
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# async with aclosing(agen) as agen:
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try:
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async for pkt in agen:
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for topic, value in pkt.items():
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pass
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# assert pred(value)
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count += 1
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if count >= times:
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break
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finally:
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await agen.aclose()
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@tractor.msg.pub(tasks=['one', 'two'])
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@ -101,7 +136,7 @@ async def test_required_args(callwith_expecterror):
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'pub_actor',
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['streamer', 'arbiter']
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)
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def test_pubsub_multi_actor_subs(
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def test_multi_actor_subs_arbiter_pub(
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loglevel,
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arb_addr,
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pub_actor,
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@ -115,7 +150,7 @@ def test_pubsub_multi_actor_subs(
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name = 'arbiter'
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if pub_actor is 'streamer':
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if pub_actor == 'streamer':
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# start the publisher as a daemon
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master_portal = await n.start_actor(
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'streamer',
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@ -131,7 +166,7 @@ def test_pubsub_multi_actor_subs(
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# block until 2nd actor is initialized
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pass
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if pub_actor is 'arbiter':
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if pub_actor == 'arbiter':
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# wait for publisher task to be spawned in a local RPC task
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while not ss.get('get_topics'):
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await trio.sleep(0.1)
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@ -144,7 +179,7 @@ def test_pubsub_multi_actor_subs(
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# block until 2nd actor is initialized
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pass
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if pub_actor is 'arbiter':
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if pub_actor == 'arbiter':
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start = time.time()
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while 'odd' not in get_topics():
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await trio.sleep(0.1)
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@ -166,13 +201,13 @@ def test_pubsub_multi_actor_subs(
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await even_portal.cancel_actor()
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await trio.sleep(0.5)
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if pub_actor is 'arbiter':
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if pub_actor == 'arbiter':
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assert 'even' not in get_topics()
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await odd_portal.cancel_actor()
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await trio.sleep(1)
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if pub_actor is 'arbiter':
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if pub_actor == 'arbiter':
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while get_topics():
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await trio.sleep(0.1)
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if time.time() - start > 1:
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@ -185,3 +220,43 @@ def test_pubsub_multi_actor_subs(
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arbiter_addr=arb_addr,
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rpc_module_paths=[__name__],
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)
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def test_single_subactor_pub_multitask_subs(
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loglevel,
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arb_addr,
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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.start_actor(
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'streamer',
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rpc_module_paths=[__name__],
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)
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async with tractor.wait_for_actor('streamer'):
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# block until 2nd actor is initialized
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pass
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async with trio.open_nursery() as tn:
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agen = await tn.start(subs, ['even'], 'streamer')
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await trio.sleep(0.1)
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tn.start_soon(subs, ['even'], 'streamer')
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# XXX this will trigger the python bug:
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# https://bugs.python.org/issue32526
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# await agen.aclose()
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await trio.sleep(0.1)
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tn.start_soon(subs, ['even'], 'streamer')
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await trio.sleep(0.1)
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tn.start_soon(subs, ['even'], 'streamer')
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await portal.cancel_actor()
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tractor.run(
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main,
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arbiter_addr=arb_addr,
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rpc_module_paths=[__name__],
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)
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