[3.11] gh-110647: Fix signal test_stress_modifying_handlers() (GH-110650) (#110659)

gh-110647: Fix signal test_stress_modifying_handlers() (GH-110650)

* cycle_handlers() now waits until at least one signal is received.
* num_received_signals can be equal to num_sent_signals.
(cherry picked from commit e07c37cd5212c9d13749b4d02a1d68e1efcba6cf)

Co-authored-by: Victor Stinner <vstinner@python.org>

diff --git a/Lib/test/test_signal.py b/Lib/test/test_signal.py
index a00c7e539400d99ff0b1855db051189990e2e5dd..0f3343b10e4a0774a6a8271811564d1dc5de3134 100644 (file)
--- a/Lib/test/test_signal.py
+++ b/Lib/test/test_signal.py
@@ -1347,7 +1347,7 @@ class StressTest(unittest.TestCase):
                 num_sent_signals += 1
 
         def cycle_handlers():
-            while num_sent_signals < 100:
+            while num_sent_signals < 100 or num_received_signals < 1:
                 for i in range(20000):
                     # Cycle between a Python-defined and a non-Python handler
                     for handler in [custom_handler, signal.SIG_IGN]:
@@ -1380,7 +1380,7 @@ class StressTest(unittest.TestCase):
             if not ignored:
                 # Sanity check that some signals were received, but not all
                 self.assertGreater(num_received_signals, 0)
-            self.assertLess(num_received_signals, num_sent_signals)
+            self.assertLessEqual(num_received_signals, num_sent_signals)
         finally:
             do_stop = True
             t.join()

diff --git a/Misc/NEWS.d/next/Tests/2023-10-10-23-20-13.gh-issue-110647.jKG3sY.rst b/Misc/NEWS.d/next/Tests/2023-10-10-23-20-13.gh-issue-110647.jKG3sY.rst
new file mode 100644 (file)
index 0000000..00f38c8
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2023-10-10-23-20-13.gh-issue-110647.jKG3sY.rst
@@ -0,0 +1,2 @@
+Fix test_stress_modifying_handlers() of test_signal. Patch by Victor
+Stinner.