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Copy pathtest_staggered.py
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97 lines (78 loc) · 2.56 KB
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import asyncio
import unittest
from asyncio.staggered import staggered_race
from test import support
support.requires_working_socket(module=True)
def tearDownModule():
asyncio.set_event_loop_policy(None)
class StaggeredTests(unittest.IsolatedAsyncioTestCase):
async def test_empty(self):
winner, index, excs = await staggered_race(
[],
delay=None,
)
self.assertIs(winner, None)
self.assertIs(index, None)
self.assertEqual(excs, [])
async def test_one_successful(self):
async def coro(index):
return f'Res: {index}'
winner, index, excs = await staggered_race(
[
lambda: coro(0),
lambda: coro(1),
],
delay=None,
)
self.assertEqual(winner, 'Res: 0')
self.assertEqual(index, 0)
self.assertEqual(excs, [None])
async def test_first_error_second_successful(self):
async def coro(index):
if index == 0:
raise ValueError(index)
return f'Res: {index}'
winner, index, excs = await staggered_race(
[
lambda: coro(0),
lambda: coro(1),
],
delay=None,
)
self.assertEqual(winner, 'Res: 1')
self.assertEqual(index, 1)
self.assertEqual(len(excs), 2)
self.assertIsInstance(excs[0], ValueError)
self.assertIs(excs[1], None)
async def test_first_timeout_second_successful(self):
async def coro(index):
if index == 0:
await asyncio.sleep(10) # much bigger than delay
return f'Res: {index}'
winner, index, excs = await staggered_race(
[
lambda: coro(0),
lambda: coro(1),
],
delay=0.1,
)
self.assertEqual(winner, 'Res: 1')
self.assertEqual(index, 1)
self.assertEqual(len(excs), 2)
self.assertIsInstance(excs[0], asyncio.CancelledError)
self.assertIs(excs[1], None)
async def test_none_successful(self):
async def coro(index):
raise ValueError(index)
winner, index, excs = await staggered_race(
[
lambda: coro(0),
lambda: coro(1),
],
delay=None,
)
self.assertIs(winner, None)
self.assertIs(index, None)
self.assertEqual(len(excs), 2)
self.assertIsInstance(excs[0], ValueError)
self.assertIsInstance(excs[1], ValueError)