Add an actor spawning test

Test that the actor nursery API and ``tractor.run`` entrypoint work when
the sub-actor's main task is all that is run (i.e. no rpc requests).
kivy_mainline_and_py3.8
Tyler Goodlet 2018-06-19 11:49:25 -04:00
parent fa8418f97f
commit c062b01b7b
1 changed files with 82 additions and 29 deletions

View File

@ -2,6 +2,7 @@
Actor model API testing
"""
import time
from functools import partial
import pytest
import trio
@ -22,21 +23,70 @@ async def test_no_arbitter():
done by the ``pytest-trio`` plugin.)
"""
with pytest.raises(RuntimeError):
with tractor.open_nursery() as nursery:
with tractor.open_nursery():
pass
def test_local_actor_async_gen():
def test_local_actor_async_func():
"""Verify a simple async function in-process.
"""
async def print_loop(actor):
nums = []
async def print_loop():
# arbiter is started in-proc if dne
assert tractor.current_actor().is_arbiter
for i in range(10):
nums.append(i)
await trio.sleep(0.1)
start = time.time()
tractor.run(print_loop)
# ensure the sleeps were actually awaited
assert time.time() - start >= 1
assert nums == list(range(10))
# NOTE: this func must be defined at module level in order for the
# interal pickling infra of the forkserver to work
async def spawn(is_arbiter):
# name = 'doggy-service'
statespace = {'doggy': 10, 'kitty': 4}
namespaces = ['piker.brokers.core']
await trio.sleep(0.1)
actor = tractor.current_actor()
assert actor.is_arbiter == is_arbiter
# arbiter should always have an empty statespace as it's redundant
sp_shouldbe = statespace if not is_arbiter else {}
assert actor.statespace == sp_shouldbe
if actor.is_arbiter:
async with tractor.open_nursery() as nursery:
# forks here
portal = await nursery.start_actor(
'sub-actor',
main=partial(spawn, False),
statespace=statespace,
rpc_module_paths=namespaces,
)
assert len(nursery._children) == 1
assert not portal._event.is_set()
assert portal._uid in tractor.current_actor()._peers
else:
return 10
def test_local_arbiter_subactor_global_state():
statespace = {'doggy': 10, 'kitty': 4}
tractor.run(
spawn,
True,
name='arbiter',
statespace=statespace,
)
@pytest.mark.trio
@ -44,13 +94,13 @@ async def test_rx_price_quotes_from_brokerd(us_symbols):
"""Verify we can spawn a daemon actor and retrieve streamed price data.
"""
async with tractor.find_actor('brokerd') as portals:
async with tractor.open_nursery() as nursery:
# only one per host address, spawns an actor if None
if not portals:
# only one per host address, spawns an actor if None
async with tractor.open_nursery() as nursery:
# no brokerd actor found
portal = await nursery.start_actor(
'brokerd',
['piker.brokers.core'],
rpc_module_paths=['piker.brokers.core'],
statespace={
'brokers2tickersubs': {},
'clients': {},
@ -81,6 +131,9 @@ async def test_rx_price_quotes_from_brokerd(us_symbols):
# await gen.asend(None)
# break
# stop all spawned subactors
await nursery.cancel()
# arbitter is cancelled here due to `find_actors()` internals
# (which internally uses `get_arbiter` which kills the root
# nursery on __exit__)
# (which internally uses `get_arbiter` which kills its channel
# server scope on exit)