diff --git a/Lib/test/test_unittest/test_async_case.py b/Lib/test/test_unittest/test_async_case.py index beadcac070b434..f59fc760d3812f 100644 --- a/Lib/test/test_unittest/test_async_case.py +++ b/Lib/test/test_unittest/test_async_case.py @@ -434,6 +434,21 @@ async def cleanup(self, fut): test.doCleanups() self.assertEqual(events, ['asyncSetUp', 'test', 'cleanup']) + def test_setup_get_event_loop(self): + # See https://github.com/python/cpython/issues/95736 + # Make sure the default event loop is not used + asyncio.set_event_loop(None) + + class TestCase1(unittest.IsolatedAsyncioTestCase): + def setUp(self): + asyncio.get_event_loop_policy().get_event_loop() + + async def test_demo1(self): + pass + + test = TestCase1('test_demo1') + result = test.run() + self.assertTrue(result.wasSuccessful()) if __name__ == "__main__": unittest.main() diff --git a/Lib/unittest/async_case.py b/Lib/unittest/async_case.py index a90eed98f87140..8b06fad0620946 100644 --- a/Lib/unittest/async_case.py +++ b/Lib/unittest/async_case.py @@ -116,6 +116,10 @@ def _setupAsyncioRunner(self): assert self._asyncioRunner is None, 'asyncio runner is already initialized' runner = asyncio.Runner(debug=True) self._asyncioRunner = runner + # Force loop to be initialized and set as the current loop + # so that setUp functions can use get_event_loop() and get the + # correct loop instance. + runner.get_loop() def _tearDownAsyncioRunner(self): runner = self._asyncioRunner diff --git a/Misc/NEWS.d/next/Library/2022-08-11-18-22-29.gh-issue-95736.LzRZXe.rst b/Misc/NEWS.d/next/Library/2022-08-11-18-22-29.gh-issue-95736.LzRZXe.rst new file mode 100644 index 00000000000000..abc270fe35ca65 --- /dev/null +++ b/Misc/NEWS.d/next/Library/2022-08-11-18-22-29.gh-issue-95736.LzRZXe.rst @@ -0,0 +1 @@ +Fix :class:`unittest.IsolatedAsyncioTestCase` to set event loop before calling setup functions. Patch by Kumar Aditya.