There's a fast-path in PyBytes_FromStringAndSize that is not covered:

Here:

We don't have test cases for it:

I propose adding:

self.assertEqual(fromstringandsize(b'a'), b'a')
self.assertEqual(fromstringandsize(b'a', 1), b'a')

So we would have better C coverage stats. It won't hurt in any case, even if this path is removed some day.

Linked PRs

• gh-121842: Improve coverage of PyBytes_FromStringAndSize #121843
• [3.13] gh-121842: Improve coverage of PyBytes_FromStringAndSize (GH-121843) #121893
• [3.12] gh-121842: Improve coverage of PyBytes_FromStringAndSize (GH-121843) #121894