tractor/tests/test_discovery.py

357 lines
11 KiB
Python

"""
Actor "discovery" testing
"""
import os
import signal
import platform
from functools import partial
import itertools
import pytest
import tractor
import trio
from conftest import tractor_test
@tractor_test
async def test_reg_then_unreg(arb_addr):
actor = tractor.current_actor()
assert actor.is_arbiter
assert len(actor._registry) == 1 # only self is registered
async with tractor.open_nursery(
arbiter_addr=arb_addr,
) as n:
portal = await n.start_actor('actor', enable_modules=[__name__])
uid = portal.channel.uid
async with tractor.get_arbiter(*arb_addr) as aportal:
# this local actor should be the arbiter
assert actor is aportal.actor
async with tractor.wait_for_actor('actor'):
# sub-actor uid should be in the registry
assert uid in aportal.actor._registry
sockaddrs = actor._registry[uid]
# XXX: can we figure out what the listen addr will be?
assert sockaddrs
await n.cancel() # tear down nursery
await trio.sleep(0.1)
assert uid not in aportal.actor._registry
sockaddrs = actor._registry.get(uid)
assert not sockaddrs
the_line = 'Hi my name is {}'
async def hi():
return the_line.format(tractor.current_actor().name)
async def say_hello(other_actor):
await trio.sleep(1) # wait for other actor to spawn
async with tractor.find_actor(other_actor) as portal:
assert portal is not None
return await portal.run(__name__, 'hi')
async def say_hello_use_wait(other_actor):
async with tractor.wait_for_actor(other_actor) as portal:
assert portal is not None
result = await portal.run(__name__, 'hi')
return result
@tractor_test
@pytest.mark.parametrize('func', [say_hello, say_hello_use_wait])
async def test_trynamic_trio(func, start_method, arb_addr):
"""Main tractor entry point, the "master" process (for now
acts as the "director").
"""
async with tractor.open_nursery() as n:
print("Alright... Action!")
donny = await n.run_in_actor(
func,
other_actor='gretchen',
name='donny',
)
gretchen = await n.run_in_actor(
func,
other_actor='donny',
name='gretchen',
)
print(await gretchen.result())
print(await donny.result())
print("CUTTTT CUUTT CUT!!?! Donny!! You're supposed to say...")
async def stream_forever():
for i in itertools.count():
yield i
await trio.sleep(0.01)
async def cancel(use_signal, delay=0):
# hold on there sally
await trio.sleep(delay)
# trigger cancel
if use_signal:
if platform.system() == 'Windows':
pytest.skip("SIGINT not supported on windows")
os.kill(os.getpid(), signal.SIGINT)
else:
raise KeyboardInterrupt
async def stream_from(portal):
async with portal.open_stream_from(stream_forever) as stream:
async for value in stream:
print(value)
async def spawn_and_check_registry(
arb_addr: tuple,
use_signal: bool,
remote_arbiter: bool = False,
with_streaming: bool = False,
) -> None:
async with tractor.open_root_actor(
arbiter_addr=arb_addr,
):
async with tractor.get_arbiter(*arb_addr) as portal:
# runtime needs to be up to call this
actor = tractor.current_actor()
if remote_arbiter:
assert not actor.is_arbiter
if actor.is_arbiter:
async def get_reg():
return await actor.get_registry()
extra = 1 # arbiter is local root actor
else:
get_reg = partial(portal.run_from_ns, 'self', 'get_registry')
extra = 2 # local root actor + remote arbiter
# ensure current actor is registered
registry = await get_reg()
assert actor.uid in registry
try:
async with tractor.open_nursery() as n:
async with trio.open_nursery() as trion:
portals = {}
for i in range(3):
name = f'a{i}'
if with_streaming:
portals[name] = await n.start_actor(
name=name, enable_modules=[__name__])
else: # no streaming
portals[name] = await n.run_in_actor(
trio.sleep_forever, name=name)
# wait on last actor to come up
async with tractor.wait_for_actor(name):
registry = await get_reg()
for uid in n._children:
assert uid in registry
assert len(portals) + extra == len(registry)
if with_streaming:
await trio.sleep(0.1)
pts = list(portals.values())
for p in pts[:-1]:
trion.start_soon(stream_from, p)
# stream for 1 sec
trion.start_soon(cancel, use_signal, 1)
last_p = pts[-1]
await stream_from(last_p)
else:
await cancel(use_signal)
finally:
await trio.sleep(0.5)
# all subactors should have de-registered
registry = await get_reg()
assert len(registry) == extra
assert actor.uid in registry
@pytest.mark.parametrize('use_signal', [False, True])
@pytest.mark.parametrize('with_streaming', [False, True])
def test_subactors_unregister_on_cancel(
start_method,
use_signal,
arb_addr,
with_streaming,
):
"""Verify that cancelling a nursery results in all subactors
deregistering themselves with the arbiter.
"""
# multi-error since there might be a channel breakage race?
with pytest.raises((KeyboardInterrupt, trio.MultiError)):
trio.run(
partial(
spawn_and_check_registry,
arb_addr,
use_signal,
remote_arbiter=False,
with_streaming=with_streaming,
),
)
@pytest.mark.parametrize('use_signal', [False, True])
@pytest.mark.parametrize('with_streaming', [False, True])
def test_subactors_unregister_on_cancel_remote_daemon(
daemon,
start_method,
use_signal,
arb_addr,
with_streaming,
):
"""Verify that cancelling a nursery results in all subactors
deregistering themselves with a **remote** (not in the local process
tree) arbiter.
"""
with pytest.raises((KeyboardInterrupt, trio.MultiError)):
trio.run(
partial(
spawn_and_check_registry,
arb_addr,
use_signal,
remote_arbiter=True,
with_streaming=with_streaming,
),
)
async def streamer(agen):
async for item in agen:
print(item)
async def close_chans_before_nursery(
arb_addr: tuple,
use_signal: bool,
remote_arbiter: bool = False,
) -> None:
# logic for how many actors should still be
# in the registry at teardown.
if remote_arbiter:
entries_at_end = 2
else:
entries_at_end = 1
async with tractor.open_root_actor(
arbiter_addr=arb_addr,
):
async with tractor.get_arbiter(*arb_addr) as aportal:
try:
get_reg = partial(aportal.run_from_ns, 'self', 'get_registry')
async with tractor.open_nursery() as tn:
portal1 = await tn.start_actor(
name='consumer1', enable_modules=[__name__])
portal2 = await tn.start_actor(
'consumer2', enable_modules=[__name__])
# TODO: compact this back as was in last commit once
# 3.9+, see https://github.com/goodboy/tractor/issues/207
async with portal1.open_stream_from(
stream_forever
) as agen1:
async with portal2.open_stream_from(
stream_forever
) as agen2:
async with trio.open_nursery() as n:
n.start_soon(streamer, agen1)
n.start_soon(cancel, use_signal, .5)
try:
await streamer(agen2)
finally:
# Kill the root nursery thus resulting in
# normal arbiter channel ops to fail during
# teardown. It doesn't seem like this is
# reliably triggered by an external SIGINT.
# tractor.current_actor()._root_nursery.cancel_scope.cancel()
# XXX: THIS IS THE KEY THING that
# happens **before** exiting the
# actor nursery block
# also kill off channels cuz why not
await agen1.aclose()
await agen2.aclose()
finally:
with trio.CancelScope(shield=True):
await trio.sleep(1)
# all subactors should have de-registered
registry = await get_reg()
assert portal1.channel.uid not in registry
assert portal2.channel.uid not in registry
assert len(registry) == entries_at_end
@pytest.mark.parametrize('use_signal', [False, True])
def test_close_channel_explicit(
start_method,
use_signal,
arb_addr,
):
"""Verify that closing a stream explicitly and killing the actor's
"root nursery" **before** the containing nursery tears down also
results in subactor(s) deregistering from the arbiter.
"""
with pytest.raises(KeyboardInterrupt):
trio.run(
partial(
close_chans_before_nursery,
arb_addr,
use_signal,
remote_arbiter=False,
),
)
@pytest.mark.parametrize('use_signal', [False, True])
def test_close_channel_explicit_remote_arbiter(
daemon,
start_method,
use_signal,
arb_addr,
):
"""Verify that closing a stream explicitly and killing the actor's
"root nursery" **before** the containing nursery tears down also
results in subactor(s) deregistering from the arbiter.
"""
with pytest.raises(KeyboardInterrupt):
trio.run(
partial(
close_chans_before_nursery,
arb_addr,
use_signal,
remote_arbiter=True,
),
)