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from concurrent.futures import Future
from datetime import datetime, timezone
from queue import Empty, Queue
from typing import Callable
import pytest
from _pytest.fixtures import FixtureRequest
from _pytest.logging import LogCaptureFixture
from anyio import create_memory_object_stream, fail_after
from apscheduler.abc import AsyncEventBroker, EventBroker, Serializer
from apscheduler.events import Event, ScheduleAdded
@pytest.fixture
def local_broker() -> EventBroker:
from apscheduler.eventbrokers.local import LocalEventBroker
return LocalEventBroker()
@pytest.fixture
def local_async_broker() -> AsyncEventBroker:
from apscheduler.eventbrokers.async_local import LocalAsyncEventBroker
return LocalAsyncEventBroker()
@pytest.fixture
def redis_broker(serializer: Serializer) -> EventBroker:
from apscheduler.eventbrokers.redis import RedisEventBroker
broker = RedisEventBroker.from_url('redis://localhost:6379')
broker.serializer = serializer
return broker
@pytest.fixture
def mqtt_broker(serializer: Serializer) -> EventBroker:
from paho.mqtt.client import Client
from apscheduler.eventbrokers.mqtt import MQTTEventBroker
return MQTTEventBroker(Client(), serializer=serializer)
@pytest.fixture
async def asyncpg_broker(serializer: Serializer) -> AsyncEventBroker:
from asyncpg import create_pool
from apscheduler.eventbrokers.asyncpg import AsyncpgEventBroker
pool = await create_pool('postgres://postgres:secret@localhost:5432/testdb')
broker = AsyncpgEventBroker.from_asyncpg_pool(pool)
broker.serializer = serializer
yield broker
await pool.close()
@pytest.fixture(params=[
pytest.param(pytest.lazy_fixture('local_broker'), id='local'),
pytest.param(pytest.lazy_fixture('redis_broker'), id='redis'),
pytest.param(pytest.lazy_fixture('mqtt_broker'), id='mqtt')
])
def broker(request: FixtureRequest) -> Callable[[], EventBroker]:
return request.param
@pytest.fixture(params=[
pytest.param(pytest.lazy_fixture('local_async_broker'), id='local'),
pytest.param(pytest.lazy_fixture('asyncpg_broker'), id='asyncpg')
])
def async_broker(request: FixtureRequest) -> Callable[[], AsyncEventBroker]:
return request.param
class TestEventBroker:
def test_publish_subscribe(self, broker: EventBroker) -> None:
def subscriber1(event) -> None:
queue.put_nowait(event)
def subscriber2(event) -> None:
queue.put_nowait(event)
queue = Queue()
with broker:
broker.subscribe(subscriber1)
broker.subscribe(subscriber2)
event = ScheduleAdded(
schedule_id='schedule1',
next_fire_time=datetime(2021, 9, 11, 12, 31, 56, 254867, timezone.utc))
broker.publish(event)
event1 = queue.get(timeout=3)
event2 = queue.get(timeout=1)
assert event1 == event2
assert isinstance(event1, ScheduleAdded)
assert isinstance(event1.timestamp, datetime)
assert event1.schedule_id == 'schedule1'
assert event1.next_fire_time == datetime(2021, 9, 11, 12, 31, 56, 254867, timezone.utc)
def test_unsubscribe(self, broker: EventBroker, caplog) -> None:
queue = Queue()
with broker:
token = broker.subscribe(queue.put_nowait)
broker.publish(Event())
queue.get(timeout=3)
broker.unsubscribe(token)
broker.publish(Event())
with pytest.raises(Empty):
queue.get(timeout=0.1)
def test_publish_no_subscribers(self, broker: EventBroker, caplog: LogCaptureFixture) -> None:
with broker:
broker.publish(Event())
assert not caplog.text
def test_publish_exception(self, broker: EventBroker, caplog: LogCaptureFixture) -> None:
def bad_subscriber(event: Event) -> None:
raise Exception('foo')
timestamp = datetime.now(timezone.utc)
event_future: Future[Event] = Future()
with broker:
broker.subscribe(bad_subscriber)
broker.subscribe(event_future.set_result)
broker.publish(Event(timestamp=timestamp))
event = event_future.result(3)
assert isinstance(event, Event)
assert event.timestamp == timestamp
assert 'Error delivering Event' in caplog.text
@pytest.mark.anyio
class TestAsyncEventBroker:
async def test_publish_subscribe(self, async_broker: AsyncEventBroker) -> None:
def subscriber1(event) -> None:
send.send_nowait(event)
async def subscriber2(event) -> None:
await send.send(event)
send, receive = create_memory_object_stream(2)
async with async_broker:
async_broker.subscribe(subscriber1)
async_broker.subscribe(subscriber2)
event = ScheduleAdded(
schedule_id='schedule1',
next_fire_time=datetime(2021, 9, 11, 12, 31, 56, 254867, timezone.utc))
await async_broker.publish(event)
with fail_after(3):
event1 = await receive.receive()
event2 = await receive.receive()
assert event1 == event2
assert isinstance(event1, ScheduleAdded)
assert isinstance(event1.timestamp, datetime)
assert event1.schedule_id == 'schedule1'
assert event1.next_fire_time == datetime(2021, 9, 11, 12, 31, 56, 254867, timezone.utc)
async def test_unsubscribe(self, async_broker: AsyncEventBroker) -> None:
send, receive = create_memory_object_stream()
async with async_broker:
token = async_broker.subscribe(send.send)
await async_broker.publish(Event())
with fail_after(3):
await receive.receive()
async_broker.unsubscribe(token)
await async_broker.publish(Event())
with pytest.raises(TimeoutError), fail_after(0.1):
await receive.receive()
async def test_publish_no_subscribers(self, async_broker: AsyncEventBroker,
caplog: LogCaptureFixture) -> None:
async with async_broker:
await async_broker.publish(Event())
assert not caplog.text
async def test_publish_exception(self, async_broker: AsyncEventBroker,
caplog: LogCaptureFixture) -> None:
def bad_subscriber(event: Event) -> None:
raise Exception('foo')
timestamp = datetime.now(timezone.utc)
events = []
async with async_broker:
async_broker.subscribe(bad_subscriber)
async_broker.subscribe(events.append)
await async_broker.publish(Event(timestamp=timestamp))
assert isinstance(events[0], Event)
assert events[0].timestamp == timestamp
assert 'Error delivering Event' in caplog.text
#
# def test_subscribe_coroutine_callback(self) -> None:
# async def callback(event: Event) -> None:
# pass
#
# with EventBroker() as eventhub:
# with pytest.raises(ValueError, match='Coroutine functions are not supported'):
# eventhub.subscribe(callback)
#
# def test_relay_events(self) -> None:
# timestamp = datetime.now(timezone.utc)
# events = []
# with EventBroker() as eventhub1, EventBroker() as eventhub2:
# eventhub2.relay_events_from(eventhub1)
# eventhub2.subscribe(events.append)
# eventhub1.publish(Event(timestamp=timestamp))
#
# assert isinstance(events[0], Event)
# assert events[0].timestamp == timestamp
#
#
# @pytest.mark.anyio
# class TestAsyncEventHub:
# async def test_publish(self) -> None:
# async def async_setitem(event: Event) -> None:
# events[1] = event
#
# timestamp = datetime.now(timezone.utc)
# events: List[Optional[Event]] = [None, None]
# async with AsyncEventBroker() as eventhub:
# eventhub.subscribe(partial(setitem, events, 0))
# eventhub.subscribe(async_setitem)
# eventhub.publish(Event(timestamp=timestamp))
#
# assert events[0] is events[1]
# assert isinstance(events[0], Event)
# assert events[0].timestamp == timestamp
#
# async def test_unsubscribe(self) -> None:
# timestamp = datetime.now(timezone.utc)
# events = []
# async with AsyncEventBroker() as eventhub:
# token = eventhub.subscribe(events.append)
# eventhub.publish(Event(timestamp=timestamp))
# eventhub.unsubscribe(token)
# eventhub.publish(Event(timestamp=timestamp))
#
# assert len(events) == 1
#
# async def test_publish_no_subscribers(self, caplog: LogCaptureFixture) -> None:
# async with AsyncEventBroker() as eventhub:
# eventhub.publish(Event(timestamp=datetime.now(timezone.utc)))
#
# assert not caplog.text
#
# async def test_publish_exception(self, caplog: LogCaptureFixture) -> None:
# def bad_subscriber(event: Event) -> None:
# raise Exception('foo')
#
# timestamp = datetime.now(timezone.utc)
# events = []
# async with AsyncEventBroker() as eventhub:
# eventhub.subscribe(bad_subscriber)
# eventhub.subscribe(events.append)
# eventhub.publish(Event(timestamp=timestamp))
#
# assert isinstance(events[0], Event)
# assert events[0].timestamp == timestamp
# assert 'Error delivering Event' in caplog.text
#
# async def test_relay_events(self) -> None:
# timestamp = datetime.now(timezone.utc)
# events = []
# async with AsyncEventBroker() as eventhub1, AsyncEventBroker() as eventhub2:
# eventhub1.relay_events_from(eventhub2)
# eventhub1.subscribe(events.append)
# eventhub2.publish(Event(timestamp=timestamp))
#
# assert isinstance(events[0], Event)
# assert events[0].timestamp == timestamp
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