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bpo-39010: Improve test shutdown #22066

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Sep 3, 2020
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bpo-39010: Improve test shutdown #22066

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14 changes: 11 additions & 3 deletions Lib/test/test_asyncio/test_windows_events.py
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Original file line number Diff line number Diff line change
Expand Up @@ -225,10 +225,18 @@ def test_read_self_pipe_restart(self):
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.

# Shut everything down cleanly. This is an important part of the
# test - in issue 39010, the error occurred during loop.close(),
# so we want to close the loop during the test instead of leaving
# it for tearDown.
#
# First wait for f to complete to avoid a "future's result was never
# retrieved" error.
self.loop.run_until_complete(f)
self.loop.close()
# Now shut down the loop itself (self.close_loop also shuts down the
# loop's default executor).
self.close_loop(self.loop)
self.assertFalse(self.loop.call_exception_handler.called)


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