https://github.com/python/cpython/commit/d96c93e4eacff67efc7791a5ae12380374dab7af
commit: d96c93e4eacff67efc7791a5ae12380374dab7af
branch: 3.14
author: Victor Stinner <[email protected]>
committer: vstinner <[email protected]>
date: 2026-10-16T23:14:31Z
summary:
[3.14] gh-158585: Backport test_capi.test_bytes from 3.15 (#159594)
gh-158585: Backport test_capi.test_bytes from 3.15
files:
M Lib/test/test_capi/test_bytes.py
diff --git a/Lib/test/test_capi/test_bytes.py b/Lib/test/test_capi/test_bytes.py
index e2a39cb4252dcf..a50e9b88cd0180 100644
--- a/Lib/test/test_capi/test_bytes.py
+++ b/Lib/test/test_capi/test_bytes.py
@@ -56,10 +56,12 @@ def test_fromstringandsize(self):
self.assertEqual(fromstringandsize(b'abc'), b'abc')
self.assertEqual(fromstringandsize(b'abc', 2), b'ab')
self.assertEqual(fromstringandsize(b'abc\0def'), b'abc\0def')
- self.assertEqual(fromstringandsize(b'a'), b'a')
- self.assertEqual(fromstringandsize(b'a', 1), b'a')
- self.assertEqual(fromstringandsize(b'', 0), b'')
- self.assertEqual(fromstringandsize(NULL, 0), b'')
+
+ # Return singleton for 0 or 1 bytes
+ self.assertIs(fromstringandsize(b'', 0), b'')
+ self.assertIs(fromstringandsize(NULL, 0), b'')
+ self.assertIs(fromstringandsize(b'a', 1), b'a')
+
self.assertEqual(len(fromstringandsize(NULL, 3)), 3)
self.assertRaises((MemoryError, OverflowError),
fromstringandsize, NULL, PY_SSIZE_T_MAX)
@@ -74,7 +76,10 @@ def test_fromstring(self):
fromstring = _testlimitedcapi.bytes_fromstring
self.assertEqual(fromstring(b'abc\0def'), b'abc')
- self.assertEqual(fromstring(b''), b'')
+
+ # Return singleton for 0 or 1 bytes
+ self.assertIs(fromstring(b''), b'')
+ self.assertIs(fromstring(b'a'), b'a')
# CRASHES fromstring(NULL)
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