From 9be283e5e15d5d5685b78a38eb132501f7f3febb Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Thu, 28 Sep 2023 15:21:15 +0200
Subject: [PATCH] gh-109594: Fix concurrent.futures test_timeout() (#110018)

Fix test_timeout() of test_concurrent_futures.test_wait. Remove the
future which may or may not complete depending if it takes longer
than the timeout ot not. Keep the second future which does not
complete before wait(). Make also the test faster: 0.5 second instead
of 6 seconds, so remove @support.requires_resource('walltime')
decorator.
---
 Lib/test/test_concurrent_futures/test_wait.py   | 17 +++++++++--------
 ...23-09-28-14-47-14.gh-issue-109594.DB5KPP.rst |  4 ++++
 2 files changed, 13 insertions(+), 8 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Tests/2023-09-28-14-47-14.gh-issue-109594.DB5KPP.rst

diff --git a/Lib/test/test_concurrent_futures/test_wait.py b/Lib/test/test_concurrent_futures/test_wait.py
index 3f64ca173c02f6..ff486202092c81 100644
--- a/Lib/test/test_concurrent_futures/test_wait.py
+++ b/Lib/test/test_concurrent_futures/test_wait.py
@@ -112,24 +112,25 @@ def test_all_completed(self):
                               future2]), finished)
         self.assertEqual(set(), pending)
 
-    @support.requires_resource('walltime')
     def test_timeout(self):
-        future1 = self.executor.submit(mul, 6, 7)
-        future2 = self.executor.submit(time.sleep, 6)
+        short_timeout = 0.050
+        long_timeout = short_timeout * 10
+
+        future = self.executor.submit(time.sleep, long_timeout)
 
         finished, pending = futures.wait(
                 [CANCELLED_AND_NOTIFIED_FUTURE,
                  EXCEPTION_FUTURE,
                  SUCCESSFUL_FUTURE,
-                 future1, future2],
-                timeout=5,
+                 future],
+                timeout=short_timeout,
                 return_when=futures.ALL_COMPLETED)
 
         self.assertEqual(set([CANCELLED_AND_NOTIFIED_FUTURE,
                               EXCEPTION_FUTURE,
-                              SUCCESSFUL_FUTURE,
-                              future1]), finished)
-        self.assertEqual(set([future2]), pending)
+                              SUCCESSFUL_FUTURE]),
+                         finished)
+        self.assertEqual(set([future]), pending)
 
 
 class ThreadPoolWaitTests(ThreadPoolMixin, WaitTests, BaseTestCase):
diff --git a/Misc/NEWS.d/next/Tests/2023-09-28-14-47-14.gh-issue-109594.DB5KPP.rst b/Misc/NEWS.d/next/Tests/2023-09-28-14-47-14.gh-issue-109594.DB5KPP.rst
new file mode 100644
index 00000000000000..5a4ae2b0837df6
--- /dev/null
+++ b/Misc/NEWS.d/next/Tests/2023-09-28-14-47-14.gh-issue-109594.DB5KPP.rst
@@ -0,0 +1,4 @@
+Fix test_timeout() of test_concurrent_futures.test_wait. Remove the future
+which may or may not complete depending if it takes longer than the timeout
+ot not. Keep the second future which does not complete before wait()
+timeout. Patch by Victor Stinner.