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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`self.doCleanups()` cannot be called from a test method of a `unittest.IsolatedAsyncioTestCase` subclass","articleBody":"Example:\r\n\r\n```python\r\nimport unittest\r\n\r\n\r\nevents = []\r\n\r\nclass Test(unittest.IsolatedAsyncioTestCase):\r\n\r\n    def test(self):\r\n        events.append('started')\r\n        self.addCleanup(events.append, 'cleanup')\r\n        self.doCleanups()\r\n        events.append('end')\r\n\r\nunittest.main(exit=False)\r\n\r\nassert events == ['started', 'cleanup', 'end'], events\r\n```\r\n\r\nThe above passes in 3.9 and 3.10, but fails in 3.11 with\r\n\r\n```\r\nE\r\n======================================================================\r\nERROR: test (__main__.Test)\r\n----------------------------------------------------------------------\r\nTraceback (most recent call last):\r\n  File \"/.../cpython/Lib/unittest/async_case.py\", line 75, in _callCleanup\r\n    self._callMaybeAsync(function, *args, **kwargs)\r\n    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\n  File \"/.../cpython/Lib/unittest/async_case.py\", line 95, in _callMaybeAsync\r\n    return self._asyncioTestContext.run(func, *args, **kwargs)\r\n           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\r\nRuntimeError: cannot enter context: \u003c_contextvars.Context object at 0x7fb2f93a9900\u003e is already entered\r\n\r\n----------------------------------------------------------------------\r\nRan 1 test in 0.002s\r\n\r\nFAILED (errors=1)\r\nTraceback (most recent call last):\r\n  File \"\u003cstdin\u003e\", line 16, in \u003cmodule\u003e\r\nAssertionError: ['started', 'end']\r\n```\r\n\r\n`git bisect` found the culprit to be gh-91150/GH-31837.","author":{"url":"https://github.com/zware","@type":"Person","name":"zware"},"datePublished":"2023-01-13T18:57:47.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/101018/cpython/issues/101018"}