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from __future__ import annotations
import asyncio
from time import sleep
from typing import Callable
import pytest
from hypercorn.app_wrappers import ASGIWrapper
from hypercorn.asyncio.lifespan import Lifespan
from hypercorn.config import Config
from hypercorn.typing import ASGIReceiveCallable, ASGISendCallable, Scope
from hypercorn.utils import LifespanFailureError, LifespanTimeoutError
from ..helpers import SlowLifespanFramework
try:
from asyncio import TaskGroup
except ImportError:
from taskgroup import TaskGroup # type: ignore
async def no_lifespan_app(scope: Scope, receive: Callable, send: Callable) -> None:
sleep(0.1) # Block purposefully
raise Exception()
@pytest.mark.asyncio
async def test_ensure_no_race_condition() -> None:
event_loop: asyncio.AbstractEventLoop = asyncio.get_running_loop()
config = Config()
config.startup_timeout = 0.2
lifespan = Lifespan(ASGIWrapper(no_lifespan_app), config, event_loop, {})
task = event_loop.create_task(lifespan.handle_lifespan())
await lifespan.wait_for_startup() # Raises if there is a race condition
await task
@pytest.mark.asyncio
async def test_startup_timeout_error() -> None:
event_loop: asyncio.AbstractEventLoop = asyncio.get_running_loop()
config = Config()
config.startup_timeout = 0.01
lifespan = Lifespan(
ASGIWrapper(SlowLifespanFramework(0.02, asyncio.sleep)), config, event_loop, {}
)
task = event_loop.create_task(lifespan.handle_lifespan())
with pytest.raises(LifespanTimeoutError) as exc_info:
await lifespan.wait_for_startup()
assert str(exc_info.value).startswith("Timeout whilst awaiting startup")
await task
async def _lifespan_failure(
scope: Scope, receive: ASGIReceiveCallable, send: ASGISendCallable
) -> None:
async with TaskGroup():
while True:
message = await receive()
if message["type"] == "lifespan.startup":
await send({"type": "lifespan.startup.failed", "message": "Failure"})
break
@pytest.mark.asyncio
async def test_startup_failure() -> None:
event_loop: asyncio.AbstractEventLoop = asyncio.get_running_loop()
lifespan = Lifespan(ASGIWrapper(_lifespan_failure), Config(), event_loop, {})
lifespan_task = event_loop.create_task(lifespan.handle_lifespan())
await lifespan.wait_for_startup()
assert lifespan_task.done()
exception = lifespan_task.exception()
assert exception.subgroup(LifespanFailureError) is not None # type: ignore
async def return_app(scope: Scope, receive: Callable, send: Callable) -> None:
return
@pytest.mark.asyncio
async def test_lifespan_return() -> None:
event_loop: asyncio.AbstractEventLoop = asyncio.get_running_loop()
lifespan = Lifespan(ASGIWrapper(return_app), Config(), event_loop, {})
lifespan_task = event_loop.create_task(lifespan.handle_lifespan())
await lifespan.wait_for_startup()
await lifespan.wait_for_shutdown()
# Should complete (not hang)
assert lifespan_task.done()
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