From 36ee6695fba758bacc91349e2198c55903d01c4a Mon Sep 17 00:00:00 2001 From: Tyler Goodlet Date: Mon, 21 Jan 2019 12:31:03 -0500 Subject: [PATCH] Add initial pubsub test --- tests/test_pubsub.py | 81 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 tests/test_pubsub.py diff --git a/tests/test_pubsub.py b/tests/test_pubsub.py new file mode 100644 index 0000000..fef3c14 --- /dev/null +++ b/tests/test_pubsub.py @@ -0,0 +1,81 @@ +from functools import partial +from itertools import cycle + +import pytest +import trio +import tractor +from async_generator import aclosing +from tractor.testing import tractor_test + + +def is_even(i): + return i % 2 == 0 + + +@tractor.msg.pub +async def pubber(get_topics): + for i in cycle(range(10)): + topics = get_topics() + yield {'even' if is_even(i) else 'odd': i} + await trio.sleep(0.1) + + +async def subs(which): + if len(which) == 1: + if which[0] == 'even': + pred = is_even + else: + pred = lambda i: not is_even(i) + else: + pred = lambda i: isinstance(i, int) + + async with tractor.find_actor('streamer') as portal: + agen = await portal.run(__name__, 'pubber', topics=which) + async with aclosing(agen) as agen: + async for pkt in agen: + for topic, value in pkt.items(): + assert pred(value) + + +def test_pubsub_multi_actor_subs( + loglevel, + arb_addr, +): + async def main(): + async with tractor.open_nursery() as n: + # start the publisher as a daemon + master_portal = await n.start_actor( + 'streamer', + rpc_module_paths=[__name__], + ) + + even_portal = await n.run_in_actor('evens', subs, which=['even']) + odd_portal = await n.run_in_actor('odds', subs, which=['odd']) + + async with tractor.wait_for_actor('odds'): + # block until 2nd actor is initialized + pass + + # TODO: how to make this work when the arbiter gets + # a portal to itself? Currently this causes a hang + # when the channel server is torn down due to a lingering + # loopback channel + # with trio.move_on_after(1): + # await subs(['even', 'odd']) + + # XXX: this would cause infinite + # blocking due to actor never terminating loop + # await even_portal.result() + + await trio.sleep(1) + await even_portal.cancel_actor() + await trio.sleep(1) + await odd_portal.cancel_actor() + + await master_portal.cancel_actor() + + tractor.run( + main, + arbiter_addr=arb_addr, + rpc_module_paths=[__name__], + )