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from __future__ import annotations
import asyncio
import sys
from collections.abc import AsyncGenerator, Coroutine, Generator
from typing import Any, cast
import pytest
import anyio
from anyio import (
Event,
TaskInfo,
create_task_group,
get_current_task,
get_running_tasks,
move_on_after,
wait_all_tasks_blocked,
)
from anyio.abc import TaskStatus
from .conftest import asyncio_params
pytestmark = pytest.mark.anyio
get_coro = asyncio.Task.get_coro
def test_main_task_name(
anyio_backend_name: str, anyio_backend_options: dict[str, Any]
) -> None:
task_name = None
async def main() -> None:
nonlocal task_name
task_name = get_current_task().name
anyio.run(main, backend=anyio_backend_name, backend_options=anyio_backend_options)
assert task_name == "tests.test_debugging.test_main_task_name.<locals>.main"
# Work around sniffio/asyncio bug that leaves behind an unclosed event loop
if anyio_backend_name == "asyncio":
import asyncio
import gc
for loop in [
obj
for obj in gc.get_objects()
if isinstance(obj, asyncio.AbstractEventLoop)
]:
loop.close()
@pytest.mark.parametrize(
"name_input,expected",
[
(None, "tests.test_debugging.test_non_main_task_name.<locals>.non_main"),
(b"name", "b'name'"),
("name", "name"),
("", ""),
],
)
async def test_non_main_task_name(
name_input: bytes | str | None, expected: str
) -> None:
async def non_main(*, task_status: TaskStatus) -> None:
task_status.started(anyio.get_current_task().name)
async with anyio.create_task_group() as tg:
name = await tg.start(non_main, name=name_input)
assert name == expected
async def test_get_running_tasks() -> None:
async def inspect() -> None:
await wait_all_tasks_blocked()
new_tasks = set(get_running_tasks()) - existing_tasks
task_infos[:] = sorted(new_tasks, key=lambda info: info.name or "")
event.set()
event = Event()
task_infos: list[TaskInfo] = []
host_task = get_current_task()
async with create_task_group() as tg:
existing_tasks = set(get_running_tasks())
tg.start_soon(event.wait, name="task1")
tg.start_soon(event.wait, name="task2")
tg.start_soon(inspect)
assert len(task_infos) == 3
expected_names = [
"task1",
"task2",
"tests.test_debugging.test_get_running_tasks.<locals>.inspect",
]
for task, expected_name in zip(task_infos, expected_names):
assert task.parent_id == host_task.id
assert task.name == expected_name
assert repr(task).endswith(f"TaskInfo(id={task.id}, name={expected_name!r})")
@pytest.mark.skipif(
sys.version_info >= (3, 11),
reason="Generator based coroutines have been removed in Python 3.11",
)
@pytest.mark.filterwarnings(
'ignore:"@coroutine" decorator is deprecated:DeprecationWarning'
)
def test_wait_generator_based_task_blocked(
asyncio_event_loop: asyncio.AbstractEventLoop,
) -> None:
async def native_coro_part() -> None:
await wait_all_tasks_blocked()
gen = cast(Generator, get_coro(gen_task))
assert not gen.gi_running
coro = cast(Coroutine, gen.gi_yieldfrom)
assert coro.cr_code.co_name == "wait"
event.set()
@asyncio.coroutine # type: ignore[attr-defined]
def generator_part() -> Generator[object, BaseException, None]:
yield from event.wait() # type: ignore[misc]
event = asyncio.Event()
gen_task: asyncio.Task[None] = asyncio_event_loop.create_task(generator_part())
asyncio_event_loop.run_until_complete(native_coro_part())
@pytest.mark.parametrize("anyio_backend", asyncio_params)
async def test_wait_all_tasks_blocked_asend(anyio_backend: str) -> None:
"""Test that wait_all_tasks_blocked() does not crash on an `asend()` object."""
async def agen_func() -> AsyncGenerator[None, None]:
yield
agen = agen_func()
coro = agen.asend(None)
loop = asyncio.get_running_loop()
task = loop.create_task(cast("Coroutine[Any, Any, Any]", coro))
await wait_all_tasks_blocked()
await task
await agen.aclose()
async def test_wait_all_tasks_blocked_cancelled_task() -> None:
done = False
async def self_cancel(*, task_status: TaskStatus) -> None:
nonlocal done
task_status.started()
with move_on_after(-1):
await Event().wait()
done = True
async with create_task_group() as tg:
await tg.start(self_cancel)
await wait_all_tasks_blocked()
assert done
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