From: Nikita Sobolev <mail@sobolevn.me>
Date: Tue, 3 Oct 2023 11:13:13 +0000 (+0300)
Subject: gh-109956: Also test typing.NamedTuple with copy.replace() (GH-109957)
X-Git-Tag: v3.13.0a1~170
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=bb2e96f6f4d6c397c4eb5775a09262a207675577;p=thirdparty%2FPython%2Fcpython.git

gh-109956: Also test typing.NamedTuple with copy.replace() (GH-109957)
---

diff --git a/Lib/test/test_copy.py b/Lib/test/test_copy.py
index c66c6eeb0081..60735ba89a80 100644
--- a/Lib/test/test_copy.py
+++ b/Lib/test/test_copy.py
@@ -936,14 +936,24 @@ class TestReplace(unittest.TestCase):
 
     def test_namedtuple(self):
         from collections import namedtuple
-        Point = namedtuple('Point', 'x y', defaults=(0,))
-        p = Point(11, 22)
-        self.assertEqual(copy.replace(p), (11, 22))
-        self.assertEqual(copy.replace(p, x=1), (1, 22))
-        self.assertEqual(copy.replace(p, y=2), (11, 2))
-        self.assertEqual(copy.replace(p, x=1, y=2), (1, 2))
-        with self.assertRaisesRegex(ValueError, 'unexpected field name'):
-            copy.replace(p, x=1, error=2)
+        from typing import NamedTuple
+        PointFromCall = namedtuple('Point', 'x y', defaults=(0,))
+        class PointFromInheritance(PointFromCall):
+            pass
+        class PointFromClass(NamedTuple):
+            x: int
+            y: int = 0
+        for Point in (PointFromCall, PointFromInheritance, PointFromClass):
+            with self.subTest(Point=Point):
+                p = Point(11, 22)
+                self.assertIsInstance(p, Point)
+                self.assertEqual(copy.replace(p), (11, 22))
+                self.assertIsInstance(copy.replace(p), Point)
+                self.assertEqual(copy.replace(p, x=1), (1, 22))
+                self.assertEqual(copy.replace(p, y=2), (11, 2))
+                self.assertEqual(copy.replace(p, x=1, y=2), (1, 2))
+                with self.assertRaisesRegex(ValueError, 'unexpected field name'):
+                    copy.replace(p, x=1, error=2)
 
     def test_dataclass(self):
         from dataclasses import dataclass