bpo-44287: asyncio test_popen() uses longer timeout (GH-26832)

Fix asyncio test_popen() of test_windows_utils by using a longer
timeout. Use military grade battle-tested test.support.SHORT_TIMEOUT
timeout rather than a hardcoded timeout of 10 seconds: it's 30
seconds by default, but it is made longer on slow buildbots.

WaitForMultipleObjects() timeout argument is in milliseconds.
(cherry picked from commit be1cb32)

Co-authored-by: Victor Stinner <[email protected]>

Author: miss-islington

Lib/test/test_asyncio/test_windows_utils.py

@@ -107,7 +107,8 @@ def test_popen(self):
 
         events = [ovin.event, ovout.event, overr.event]
         # Super-long timeout for slow buildbots.
-        res = _winapi.WaitForMultipleObjects(events, True, 10000)
+        res = _winapi.WaitForMultipleObjects(events, True,
+                                             int(support.SHORT_TIMEOUT * 1000))
         self.assertEqual(res, _winapi.WAIT_OBJECT_0)
         self.assertFalse(ovout.pending)
         self.assertFalse(overr.pending)

Misc/NEWS.d/next/Tests/2021-06-21-17-53-41.bpo-44287.YON57s.rst

@@ -0,0 +1,4 @@
+Fix asyncio test_popen() of test_windows_utils by using a longer timeout.
+Use military grade battle-tested :data:`test.support.SHORT_TIMEOUT` timeout
+rather than a hardcoded timeout of 10 seconds: it's 30 seconds by default, but
+it is made longer on slow buildbots. Patch by Victor Stinner.