From: sobolevn <mail@sobolevn.me>
Date: Wed, 30 Apr 2025 16:03:19 +0000 (+0300)
Subject: gh-133211: Test that PEP750 types are final (#133212)
X-Git-Tag: v3.14.0b1~166
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f7264ddea0ceea7eaf26d7b4b6aa7a144649e214;p=thirdparty%2FPython%2Fcpython.git

gh-133211: Test that PEP750 types are final (#133212)
---

diff --git a/Lib/test/test_string/test_templatelib.py b/Lib/test/test_string/test_templatelib.py
index 5cf187828510..5221ca673b24 100644
--- a/Lib/test/test_string/test_templatelib.py
+++ b/Lib/test/test_string/test_templatelib.py
@@ -18,6 +18,13 @@ class TestTemplate(unittest.TestCase, TStringBaseCase):
         self.assertEqual(type(i).__qualname__, 'Interpolation')
         self.assertEqual(type(i).__module__, 'string.templatelib')
 
+    def test_final_types(self):
+        with self.assertRaisesRegex(TypeError, 'is not an acceptable base type'):
+            class Sub(Template): ...
+
+        with self.assertRaisesRegex(TypeError, 'is not an acceptable base type'):
+            class Sub(Interpolation): ...
+
     def test_basic_creation(self):
         # Simple t-string creation
         t = t'Hello, world'