From 51aaec4003721bd638cb93c3f620ec61e9741477 Mon Sep 17 00:00:00 2001 From: Mikhail Efimov Date: Mon, 20 Oct 2025 13:45:07 +0300 Subject: [PATCH] gh-139951: Test on GC collection disabled if threshold is zero (GH-140304) (cherry picked from commit 5d0abb69715b9638f26c896444643055ec2ef038) Co-authored-by: Mikhail Efimov --- Lib/test/test_gc.py | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Lib/test/test_gc.py b/Lib/test/test_gc.py index 3e7dda3bac2113..81577470c5831c 100644 --- a/Lib/test/test_gc.py +++ b/Lib/test/test_gc.py @@ -1524,6 +1524,20 @@ def test_indirect_calls_with_gc_disabled(self): finally: gc.enable() + # Ensure that setting *threshold0* to zero disables collection. + @gc_threshold(0) + def test_threshold_zero(self): + junk = [] + i = 0 + detector = GC_Detector() + while not detector.gc_happened: + i += 1 + if i > 50000: + break + junk.append([]) # this may eventually trigger gc (if it is enabled) + + self.assertEqual(i, 50001) + class PythonFinalizationTests(unittest.TestCase): def test_ast_fini(self):