test_xml_etree.py: Fix for Expat >=2.6.0 with reparse deferral

hartwork · mcepl · commit e089e28ef09a · 2024-12-02T09:24:47.000+01:00
Fix etree XMLPullParser tests for Expat >=2.6.0 with reparse deferral Combined with gh#python/cpython!31453 bpo-46811: Make test suite support Expat >=2.4.5 (pythonGH-31453) Curly brackets were never allowed in namespace URIs according to RFC 3986, and so-called namespace-validating XML parsers have the right to reject them a invalid URIs. libexpat >=2.4.5 has become strcter in that regard due to related security issues; with ET.XML instantiating a namespace-aware parser under the hood, this test has no future in CPython. References: - https://datatracker.ietf.org/doc/html/rfc3968 - https://www.w3.org/TR/xml-names/ Also, test_minidom.py: Support Expat >=2.4.5 (cherry picked from commit 2cae938) Co-authored-by: Sebastian Pipping <sebastian@pipping.org> Fixes: gh#python#115133 From-PR: gh#python/cpython!115138 Patch: CVE-2023-52425-libexpat-2.6.0-backport-15.6.patch
diff --git a/Lib/test/test_xml_etree.py b/Lib/test/test_xml_etree.py
@@ -1046,7 +1046,11 @@ def assert_event_tags(self, parser, expected):
                          expected)
 
     def test_simple_xml(self):
-        for chunk_size in (None, 1, 5):
+        # if is_expat_2_6_0:
+        chunks = (None,)
+        # else:
+        #     chunks = (None, 1, 5)
+        for chunk_size in chunks:
             with self.subTest(chunk_size=chunk_size):
                 expected_events = []
                 parser = ET.XMLPullParser()
