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Example:
import unittest events = [] class Test(unittest.IsolatedAsyncioTestCase): def test(self): events.append('started') self.addCleanup(events.append, 'cleanup') self.doCleanups() events.append('end') unittest.main(exit=False) assert events == ['started', 'cleanup', 'end'], eventsThe above passes in 3.9 and 3.10, but fails in 3.11 with
E ====================================================================== ERROR: test (__main__.Test) ---------------------------------------------------------------------- Traceback (most recent call last): File "/.../cpython/Lib/unittest/async_case.py", line 75, in _callCleanup self._callMaybeAsync(function, *args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/.../cpython/Lib/unittest/async_case.py", line 95, in _callMaybeAsync return self._asyncioTestContext.run(func, *args, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ RuntimeError: cannot enter context: <_contextvars.Context object at 0x7fb2f93a9900> is already entered ---------------------------------------------------------------------- Ran 1 test in 0.002s FAILED (errors=1) Traceback (most recent call last): File "<stdin>", line 16, in <module> AssertionError: ['started', 'end'] Metadata
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