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# -*- coding: utf-8 -*-
import asyncio
from asyncio import Future, get_running_loop, sleep, wait_for
from typing import NoReturn
import pytest
import pytest_asyncio.plugin # noqa
try:
from asyncio.exceptions import TimeoutError # type: ignore
except ImportError:
from concurrent.futures import TimeoutError # type: ignore
from pyee.asyncio import AsyncIOEventEmitter
class PyeeTestError(Exception):
pass
@pytest.mark.asyncio
async def test_emit() -> None:
"""Test that AsyncIOEventEmitter can handle wrapping
coroutines
"""
ee = AsyncIOEventEmitter(loop=get_running_loop())
should_call: Future[bool] = Future(loop=get_running_loop())
@ee.on("event")
async def event_handler() -> None:
should_call.set_result(True)
ee.emit("event")
result = await wait_for(should_call, 0.1)
assert result is True
await asyncio.sleep(0)
assert ee.complete
@pytest.mark.asyncio
async def test_once_emit() -> None:
"""Test that AsyncIOEventEmitter also wrap coroutines when
using once
"""
ee = AsyncIOEventEmitter(loop=get_running_loop())
should_call: Future[bool] = Future(loop=get_running_loop())
@ee.once("event")
async def event_handler():
should_call.set_result(True)
ee.emit("event")
result = await wait_for(should_call, 0.1)
assert result is True
@pytest.mark.asyncio
async def test_error() -> None:
"""Test that AsyncIOEventEmitter can handle errors when
wrapping coroutines
"""
ee = AsyncIOEventEmitter(loop=get_running_loop())
should_call: Future[bool] = Future(loop=get_running_loop())
@ee.on("event")
async def event_handler() -> NoReturn:
raise PyeeTestError()
@ee.on("error")
def handle_error(exc):
should_call.set_result(exc)
ee.emit("event")
result = await wait_for(should_call, 0.1)
assert isinstance(result, PyeeTestError)
@pytest.mark.asyncio
async def test_future_canceled() -> None:
"""Test that AsyncIOEventEmitter can handle canceled Futures"""
cancel_me: Future[bool] = Future(loop=get_running_loop())
should_not_call: Future[None] = Future(loop=get_running_loop())
ee = AsyncIOEventEmitter(loop=get_running_loop())
@ee.on("event")
async def event_handler() -> None:
cancel_me.cancel()
@ee.on("error")
def handle_error(exc) -> None:
should_not_call.set_result(None)
ee.emit("event")
try:
await wait_for(should_not_call, 0.1)
except TimeoutError:
pass
else:
raise PyeeTestError()
@pytest.mark.asyncio
async def test_event_emitter_canceled() -> None:
"""Test that all running handlers in AsyncIOEventEmitter can be canceled"""
ee = AsyncIOEventEmitter(loop=get_running_loop())
should_not_call: Future[bool] = Future(loop=get_running_loop())
@ee.on("event")
async def event_handler():
await sleep(1)
should_not_call.set_result(True)
ee.emit("event")
await sleep(0)
# event_handler should still be running
assert not ee.complete
# cancel all pending tasks, including event_handler
ee.cancel()
await sleep(0)
# event_handler should be canceled
assert ee.complete
@pytest.mark.asyncio
async def test_wait_for_complete() -> None:
"""Test waiting for all pending tasks in an AsyncIOEventEmitter to
complete
"""
ee = AsyncIOEventEmitter(loop=get_running_loop())
@ee.on("event")
async def event_handler():
await sleep(0.1)
ee.emit("event")
await sleep(0)
# event_handler should still be running
assert not ee.complete
# wait for event_handler to complete execution
await ee.wait_for_complete()
# event_handler should have finished execution
assert ee.complete
@pytest.mark.asyncio
async def test_sync_error() -> None:
"""Test that regular functions have the same error handling as coroutines"""
ee = AsyncIOEventEmitter(loop=get_running_loop())
should_call: Future[Exception] = Future(loop=get_running_loop())
@ee.on("event")
def sync_handler():
raise PyeeTestError()
@ee.on("error")
def handle_error(exc):
should_call.set_result(exc)
ee.emit("event")
result = await wait_for(should_call, 0.1)
assert isinstance(result, PyeeTestError)
|
