mirror of
https://github.com/python/cpython.git
synced 2025-11-04 07:31:38 +00:00
357 lines
10 KiB
Python
357 lines
10 KiB
Python
"""Tests for base_events.py"""
|
|
|
|
import asyncio
|
|
import contextvars
|
|
import unittest
|
|
|
|
from unittest import mock
|
|
from asyncio import tasks
|
|
from test.test_asyncio import utils as test_utils
|
|
import test.support
|
|
from test.support.script_helper import assert_python_ok
|
|
|
|
MOCK_ANY = mock.ANY
|
|
|
|
|
|
def tearDownModule():
|
|
asyncio.set_event_loop_policy(None)
|
|
|
|
|
|
class EagerTaskFactoryLoopTests:
|
|
|
|
Task = None
|
|
|
|
def run_coro(self, coro):
|
|
"""
|
|
Helper method to run the `coro` coroutine in the test event loop.
|
|
It helps with making sure the event loop is running before starting
|
|
to execute `coro`. This is important for testing the eager step
|
|
functionality, since an eager step is taken only if the event loop
|
|
is already running.
|
|
"""
|
|
|
|
async def coro_runner():
|
|
self.assertTrue(asyncio.get_event_loop().is_running())
|
|
return await coro
|
|
|
|
return self.loop.run_until_complete(coro)
|
|
|
|
def setUp(self):
|
|
super().setUp()
|
|
self.loop = asyncio.new_event_loop()
|
|
self.eager_task_factory = asyncio.create_eager_task_factory(self.Task)
|
|
self.loop.set_task_factory(self.eager_task_factory)
|
|
self.set_event_loop(self.loop)
|
|
|
|
def test_eager_task_factory_set(self):
|
|
self.assertIsNotNone(self.eager_task_factory)
|
|
self.assertIs(self.loop.get_task_factory(), self.eager_task_factory)
|
|
|
|
async def noop(): pass
|
|
|
|
async def run():
|
|
t = self.loop.create_task(noop())
|
|
self.assertIsInstance(t, self.Task)
|
|
await t
|
|
|
|
self.run_coro(run())
|
|
|
|
def test_await_future_during_eager_step(self):
|
|
|
|
async def set_result(fut, val):
|
|
fut.set_result(val)
|
|
|
|
async def run():
|
|
fut = self.loop.create_future()
|
|
t = self.loop.create_task(set_result(fut, 'my message'))
|
|
# assert the eager step completed the task
|
|
self.assertTrue(t.done())
|
|
return await fut
|
|
|
|
self.assertEqual(self.run_coro(run()), 'my message')
|
|
|
|
def test_eager_completion(self):
|
|
|
|
async def coro():
|
|
return 'hello'
|
|
|
|
async def run():
|
|
t = self.loop.create_task(coro())
|
|
# assert the eager step completed the task
|
|
self.assertTrue(t.done())
|
|
return await t
|
|
|
|
self.assertEqual(self.run_coro(run()), 'hello')
|
|
|
|
def test_block_after_eager_step(self):
|
|
|
|
async def coro():
|
|
await asyncio.sleep(0.1)
|
|
return 'finished after blocking'
|
|
|
|
async def run():
|
|
t = self.loop.create_task(coro())
|
|
self.assertFalse(t.done())
|
|
result = await t
|
|
self.assertTrue(t.done())
|
|
return result
|
|
|
|
self.assertEqual(self.run_coro(run()), 'finished after blocking')
|
|
|
|
def test_cancellation_after_eager_completion(self):
|
|
|
|
async def coro():
|
|
return 'finished without blocking'
|
|
|
|
async def run():
|
|
t = self.loop.create_task(coro())
|
|
t.cancel()
|
|
result = await t
|
|
# finished task can't be cancelled
|
|
self.assertFalse(t.cancelled())
|
|
return result
|
|
|
|
self.assertEqual(self.run_coro(run()), 'finished without blocking')
|
|
|
|
def test_cancellation_after_eager_step_blocks(self):
|
|
|
|
async def coro():
|
|
await asyncio.sleep(0.1)
|
|
return 'finished after blocking'
|
|
|
|
async def run():
|
|
t = self.loop.create_task(coro())
|
|
t.cancel('cancellation message')
|
|
self.assertGreater(t.cancelling(), 0)
|
|
result = await t
|
|
|
|
with self.assertRaises(asyncio.CancelledError) as cm:
|
|
self.run_coro(run())
|
|
|
|
self.assertEqual('cancellation message', cm.exception.args[0])
|
|
|
|
def test_current_task(self):
|
|
captured_current_task = None
|
|
|
|
async def coro():
|
|
nonlocal captured_current_task
|
|
captured_current_task = asyncio.current_task()
|
|
# verify the task before and after blocking is identical
|
|
await asyncio.sleep(0.1)
|
|
self.assertIs(asyncio.current_task(), captured_current_task)
|
|
|
|
async def run():
|
|
t = self.loop.create_task(coro())
|
|
self.assertIs(captured_current_task, t)
|
|
await t
|
|
|
|
self.run_coro(run())
|
|
captured_current_task = None
|
|
|
|
def test_all_tasks_with_eager_completion(self):
|
|
captured_all_tasks = None
|
|
|
|
async def coro():
|
|
nonlocal captured_all_tasks
|
|
captured_all_tasks = asyncio.all_tasks()
|
|
|
|
async def run():
|
|
t = self.loop.create_task(coro())
|
|
self.assertIn(t, captured_all_tasks)
|
|
self.assertNotIn(t, asyncio.all_tasks())
|
|
|
|
self.run_coro(run())
|
|
|
|
def test_all_tasks_with_blocking(self):
|
|
captured_eager_all_tasks = None
|
|
|
|
async def coro(fut1, fut2):
|
|
nonlocal captured_eager_all_tasks
|
|
captured_eager_all_tasks = asyncio.all_tasks()
|
|
await fut1
|
|
fut2.set_result(None)
|
|
|
|
async def run():
|
|
fut1 = self.loop.create_future()
|
|
fut2 = self.loop.create_future()
|
|
t = self.loop.create_task(coro(fut1, fut2))
|
|
self.assertIn(t, captured_eager_all_tasks)
|
|
self.assertIn(t, asyncio.all_tasks())
|
|
fut1.set_result(None)
|
|
await fut2
|
|
self.assertNotIn(t, asyncio.all_tasks())
|
|
|
|
self.run_coro(run())
|
|
|
|
def test_context_vars(self):
|
|
cv = contextvars.ContextVar('cv', default=0)
|
|
|
|
coro_first_step_ran = False
|
|
coro_second_step_ran = False
|
|
|
|
async def coro():
|
|
nonlocal coro_first_step_ran
|
|
nonlocal coro_second_step_ran
|
|
self.assertEqual(cv.get(), 1)
|
|
cv.set(2)
|
|
self.assertEqual(cv.get(), 2)
|
|
coro_first_step_ran = True
|
|
await asyncio.sleep(0.1)
|
|
self.assertEqual(cv.get(), 2)
|
|
cv.set(3)
|
|
self.assertEqual(cv.get(), 3)
|
|
coro_second_step_ran = True
|
|
|
|
async def run():
|
|
cv.set(1)
|
|
t = self.loop.create_task(coro())
|
|
self.assertTrue(coro_first_step_ran)
|
|
self.assertFalse(coro_second_step_ran)
|
|
self.assertEqual(cv.get(), 1)
|
|
await t
|
|
self.assertTrue(coro_second_step_ran)
|
|
self.assertEqual(cv.get(), 1)
|
|
|
|
self.run_coro(run())
|
|
|
|
|
|
class PyEagerTaskFactoryLoopTests(EagerTaskFactoryLoopTests, test_utils.TestCase):
|
|
Task = tasks._PyTask
|
|
|
|
|
|
@unittest.skipUnless(hasattr(tasks, '_CTask'),
|
|
'requires the C _asyncio module')
|
|
class CEagerTaskFactoryLoopTests(EagerTaskFactoryLoopTests, test_utils.TestCase):
|
|
Task = getattr(tasks, '_CTask', None)
|
|
|
|
def test_issue105987(self):
|
|
code = """if 1:
|
|
from _asyncio import _swap_current_task
|
|
|
|
class DummyTask:
|
|
pass
|
|
|
|
class DummyLoop:
|
|
pass
|
|
|
|
l = DummyLoop()
|
|
_swap_current_task(l, DummyTask())
|
|
t = _swap_current_task(l, None)
|
|
"""
|
|
|
|
_, out, err = assert_python_ok("-c", code)
|
|
self.assertFalse(err)
|
|
|
|
class AsyncTaskCounter:
|
|
def __init__(self, loop, *, task_class, eager):
|
|
self.suspense_count = 0
|
|
self.task_count = 0
|
|
|
|
def CountingTask(*args, eager_start=False, **kwargs):
|
|
if not eager_start:
|
|
self.task_count += 1
|
|
kwargs["eager_start"] = eager_start
|
|
return task_class(*args, **kwargs)
|
|
|
|
if eager:
|
|
factory = asyncio.create_eager_task_factory(CountingTask)
|
|
else:
|
|
def factory(loop, coro, **kwargs):
|
|
return CountingTask(coro, loop=loop, **kwargs)
|
|
loop.set_task_factory(factory)
|
|
|
|
def get(self):
|
|
return self.task_count
|
|
|
|
|
|
async def awaitable_chain(depth):
|
|
if depth == 0:
|
|
return 0
|
|
return 1 + await awaitable_chain(depth - 1)
|
|
|
|
|
|
async def recursive_taskgroups(width, depth):
|
|
if depth == 0:
|
|
return
|
|
|
|
async with asyncio.TaskGroup() as tg:
|
|
futures = [
|
|
tg.create_task(recursive_taskgroups(width, depth - 1))
|
|
for _ in range(width)
|
|
]
|
|
|
|
|
|
async def recursive_gather(width, depth):
|
|
if depth == 0:
|
|
return
|
|
|
|
await asyncio.gather(
|
|
*[recursive_gather(width, depth - 1) for _ in range(width)]
|
|
)
|
|
|
|
|
|
class BaseTaskCountingTests:
|
|
|
|
Task = None
|
|
eager = None
|
|
expected_task_count = None
|
|
|
|
def setUp(self):
|
|
super().setUp()
|
|
self.loop = asyncio.new_event_loop()
|
|
self.counter = AsyncTaskCounter(self.loop, task_class=self.Task, eager=self.eager)
|
|
self.set_event_loop(self.loop)
|
|
|
|
def test_awaitables_chain(self):
|
|
observed_depth = self.loop.run_until_complete(awaitable_chain(100))
|
|
self.assertEqual(observed_depth, 100)
|
|
self.assertEqual(self.counter.get(), 0 if self.eager else 1)
|
|
|
|
def test_recursive_taskgroups(self):
|
|
num_tasks = self.loop.run_until_complete(recursive_taskgroups(5, 4))
|
|
self.assertEqual(self.counter.get(), self.expected_task_count)
|
|
|
|
def test_recursive_gather(self):
|
|
self.loop.run_until_complete(recursive_gather(5, 4))
|
|
self.assertEqual(self.counter.get(), self.expected_task_count)
|
|
|
|
|
|
class BaseNonEagerTaskFactoryTests(BaseTaskCountingTests):
|
|
eager = False
|
|
expected_task_count = 781 # 1 + 5 + 5^2 + 5^3 + 5^4
|
|
|
|
|
|
class BaseEagerTaskFactoryTests(BaseTaskCountingTests):
|
|
eager = True
|
|
expected_task_count = 0
|
|
|
|
|
|
class NonEagerTests(BaseNonEagerTaskFactoryTests, test_utils.TestCase):
|
|
Task = asyncio.Task
|
|
|
|
|
|
class EagerTests(BaseEagerTaskFactoryTests, test_utils.TestCase):
|
|
Task = asyncio.Task
|
|
|
|
|
|
class NonEagerPyTaskTests(BaseNonEagerTaskFactoryTests, test_utils.TestCase):
|
|
Task = tasks._PyTask
|
|
|
|
|
|
class EagerPyTaskTests(BaseEagerTaskFactoryTests, test_utils.TestCase):
|
|
Task = tasks._PyTask
|
|
|
|
|
|
@unittest.skipUnless(hasattr(tasks, '_CTask'),
|
|
'requires the C _asyncio module')
|
|
class NonEagerCTaskTests(BaseNonEagerTaskFactoryTests, test_utils.TestCase):
|
|
Task = getattr(tasks, '_CTask', None)
|
|
|
|
|
|
@unittest.skipUnless(hasattr(tasks, '_CTask'),
|
|
'requires the C _asyncio module')
|
|
class EagerCTaskTests(BaseEagerTaskFactoryTests, test_utils.TestCase):
|
|
Task = getattr(tasks, '_CTask', None)
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|