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[3.13] gh-119121: Fix and testasync.staggered.staggered_race (GH-119173)#119206
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| 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) |
2 changes: 2 additions & 0 deletionsMisc/NEWS.d/next/Library/2024-05-19-13-05-59.gh-issue-119121.P1gnh1.rst
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| Fix a NameError happening in ``asyncio.staggered.staggered_race``. This | ||
| function is now tested. |
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