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From 35f5707b555d3bca92858de16760918e76463a1e Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <sebastian@pipping.org>
Date: Mon, 21 Feb 2022 15:48:32 +0100
Subject: [PATCH] 00378-support-expat-2-4-5.patch

00378 #
Support expat 2.4.5

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

Upstream: https://bugs.python.org/issue46811

Backported from Python 3.

Co-authored-by: Sebastian Pipping <sebastian@pipping.org>
---
 Lib/test/test_minidom.py                                  | 8 ++++++--
 Lib/test/test_xml_etree.py                                | 6 ------
 .../next/Library/2022-02-20-21-03-31.bpo-46811.8BxgdQ.rst | 1 +
 3 files changed, 7 insertions(+), 8 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Library/2022-02-20-21-03-31.bpo-46811.8BxgdQ.rst

diff --git a/Lib/test/test_minidom.py b/Lib/test/test_minidom.py
index 2eb6423..2c9a7a3 100644
--- a/Lib/test/test_minidom.py
+++ b/Lib/test/test_minidom.py
@@ -6,12 +6,14 @@ from StringIO import StringIO
 from test import support
 import unittest
 
+import pyexpat
 import xml.dom
 import xml.dom.minidom
 import xml.parsers.expat
 
 from xml.dom.minidom import parse, Node, Document, parseString
 from xml.dom.minidom import getDOMImplementation
+from xml.parsers.expat import ExpatError
 
 
 tstfile = support.findfile("test.xml", subdir="xmltestdata")
@@ -1051,8 +1053,10 @@ class MinidomTest(unittest.TestCase):
 
         # Verify that character decoding errors raise exceptions instead
         # of crashing
-        self.assertRaises(UnicodeDecodeError, parseString,
-                '<fran\xe7ais>Comment \xe7a va ? Tr\xe8s bien ?</fran\xe7ais>')
+        self.assertRaises(ExpatError, parseString,
+                '<fran\xe7ais></fran\xe7ais>')
+        self.assertRaises(ExpatError, parseString,
+                '<franais>Comment \xe7a va ? Tr\xe8s bien ?</franais>')
 
         doc.unlink()
 
diff --git a/Lib/test/test_xml_etree.py b/Lib/test/test_xml_etree.py
index c75d55f..0855bc0 100644
--- a/Lib/test/test_xml_etree.py
+++ b/Lib/test/test_xml_etree.py
@@ -1482,12 +1482,6 @@ class BugsTest(unittest.TestCase):
                 b"<?xml version='1.0' encoding='ascii'?>\n"
                 b'<body>t&#227;g</body>')
 
-    def test_issue3151(self):
-        e = ET.XML('<prefix:localname xmlns:prefix="${stuff}"/>')
-        self.assertEqual(e.tag, '{${stuff}}localname')
-        t = ET.ElementTree(e)
-        self.assertEqual(ET.tostring(e), b'<ns0:localname xmlns:ns0="${stuff}" />')
-
     def test_issue6565(self):
         elem = ET.XML("<body><tag/></body>")
         self.assertEqual(summarize_list(elem), ['tag'])
diff --git a/Misc/NEWS.d/next/Library/2022-02-20-21-03-31.bpo-46811.8BxgdQ.rst b/Misc/NEWS.d/next/Library/2022-02-20-21-03-31.bpo-46811.8BxgdQ.rst
new file mode 100644
index 0000000..6969bd1
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2022-02-20-21-03-31.bpo-46811.8BxgdQ.rst
@@ -0,0 +1 @@
+Make test suite support Expat >=2.4.5
-- 
2.35.1