[3.13] GH-144739: Skip test_pyexpat.MemoryProtectionTest based on expat compile-time version, not runtime (GH-144740) (GH-145494) (#145510)

[3.14] GH-144739: Skip test_pyexpat.MemoryProtectionTest based on expat compile-time version, not runtime (GH-144740) (GH-145494)

GH-144739: Skip test_pyexpat.MemoryProtectionTest based on expat compile-time version, not runtime (GH-144740)

(cherry picked from commit 45e9343)
(cherry picked from commit bcc2dd8)

Co-authored-by: Victor Stinner <vstinner@python.org>
Co-authored-by: Miro Hrončok <miro@hroncok.cz>

Author: 3 people

Lib/test/test_pyexpat.py

@@ -998,7 +998,9 @@ def test_set_maximum_amplification__fail_for_subparser(self):
         self.assert_root_parser_failure(setter, 123.45)
 
 
-@unittest.skipIf(expat.version_info < (2, 7, 2), "requires Expat >= 2.7.2")
+@unittest.skipIf(not hasattr(expat.XMLParserType,
+                             "SetAllocTrackerMaximumAmplification"),
+                 "requires Python compiled with Expat >= 2.7.2")
 class MemoryProtectionTest(AttackProtectionTestBase, unittest.TestCase):
 
     # NOTE: with the default Expat configuration, the billion laughs protection

Misc/NEWS.d/next/Tests/2026-02-12-12-12-00.gh-issue-144739.-fx1tN.rst

@@ -0,0 +1,3 @@
+When Python was compiled with system expat older then 2.7.2 but tests run
+with newer expat, still skip
+:class:`!test.test_pyexpat.MemoryProtectionTest`.