diff options
Diffstat (limited to 'Lib/test/test_asyncio/test_windows_events.py')
| -rw-r--r-- | Lib/test/test_asyncio/test_windows_events.py | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Lib/test/test_asyncio/test_windows_events.py b/Lib/test/test_asyncio/test_windows_events.py index 6b00570..33388a8 100644 --- a/Lib/test/test_asyncio/test_windows_events.py +++ b/Lib/test/test_asyncio/test_windows_events.py @@ -211,6 +211,26 @@ class ProactorTests(test_utils.TestCase): fut.cancel() fut.cancel() + def test_read_self_pipe_restart(self): + # Regression test for https://bugs.python.org/issue39010 + # Previously, restarting a proactor event loop in certain states + # would lead to spurious ConnectionResetErrors being logged. + self.loop.call_exception_handler = mock.Mock() + # Start an operation in another thread so that the self-pipe is used. + # This is theoretically timing-dependent (the task in the executor + # must complete before our start/stop cycles), but in practice it + # seems to work every time. + f = self.loop.run_in_executor(None, lambda: None) + self.loop.stop() + self.loop.run_forever() + self.loop.stop() + self.loop.run_forever() + # If we don't wait for f to complete here, we may get another + # warning logged about a thread that didn't shut down cleanly. + self.loop.run_until_complete(f) + self.loop.close() + self.assertFalse(self.loop.call_exception_handler.called) + class WinPolicyTests(test_utils.TestCase): |