[3.15] gh-152415: Exercise curses non-ASCII tests under 8-bit locale encodings (GH-152416) - #152453
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[3.15] gh-152415: Exercise curses non-ASCII tests under 8-bit locale encodings (GH-152416)#152453serhiy-storchaka merged 1 commit intopython:3.15python/cpython:3.15from serhiy-storchaka:backport-003d362-3.15serhiy-storchaka/cpython:backport-003d362-3.15Copy head branch name to clipboard
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…ocale encodings (pythonGH-152416) The non-ASCII tests only exercised what the runner's locale could encode (in practice UTF-8). Add 8-bit-encoding cases to the character and string I/O tests, each guarded by the existing encodability check: ASCII, a character common to the Latin encodings ('é'), and ones distinctive to a single encoding (byte 0xA4 is '¤' in ISO-8859-1, '€' in ISO-8859-15, 'є' in KOI8-U). Run the whole suite under different locales to cover them; unrepresentable cases skip. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * pythongh-152415: Verify character output round-trips in test_output_character Read each written character back with in_wch() or instr() rather than inch(), which on a wide build returns the low byte of the code point instead of the locale-encoded byte and so mangles a non-ASCII character of an 8-bit locale. This lets the int-argument cases cover '€'/'є', and adds matching coverage for the str argument. insch() with an int byte > 127 is checked only for Latin-1: on a wide build ncurses winsch stores a printable byte directly as a code point instead of decoding it through the locale. (cherry picked from commit 003d362) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
serhiy-storchaka
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June 27, 2026 20:10
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Thanks @serhiy-storchaka for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14. |
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GH-152456 is a backport of this pull request to the 3.14 branch. |
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GH-152457 is a backport of this pull request to the 3.13 branch. |
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…encodings (GH-152416) (GH-152453) (GH-152457) The non-ASCII tests only exercised what the runner's locale could encode (in practice UTF-8). Add 8-bit-encoding cases to the character and string I/O tests, each guarded by the existing encodability check: ASCII, a character common to the Latin encodings ('é'), and ones distinctive to a single encoding (byte 0xA4 is '¤' in ISO-8859-1, '€' in ISO-8859-15, 'є' in KOI8-U). Run the whole suite under different locales to cover them; unrepresentable cases skip. * gh-152415: Verify character output round-trips in test_output_character Read each written character back with in_wch() or instr() rather than inch(), which on a wide build returns the low byte of the code point instead of the locale-encoded byte and so mangles a non-ASCII character of an 8-bit locale. This lets the int-argument cases cover '€'/'є', and adds matching coverage for the str argument. insch() with an int byte > 127 is checked only for Latin-1: on a wide build ncurses winsch stores a printable byte directly as a code point instead of decoding it through the locale. (cherry picked from commit 003d362) (cherry picked from commit a75aa41) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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…encodings (GH-152416) (GH-152453) (GH-152456) The non-ASCII tests only exercised what the runner's locale could encode (in practice UTF-8). Add 8-bit-encoding cases to the character and string I/O tests, each guarded by the existing encodability check: ASCII, a character common to the Latin encodings ('é'), and ones distinctive to a single encoding (byte 0xA4 is '¤' in ISO-8859-1, '€' in ISO-8859-15, 'є' in KOI8-U). Run the whole suite under different locales to cover them; unrepresentable cases skip. * gh-152415: Verify character output round-trips in test_output_character Read each written character back with in_wch() or instr() rather than inch(), which on a wide build returns the low byte of the code point instead of the locale-encoded byte and so mangles a non-ASCII character of an 8-bit locale. This lets the int-argument cases cover '€'/'є', and adds matching coverage for the str argument. insch() with an int byte > 127 is checked only for Latin-1: on a wide build ncurses winsch stores a printable byte directly as a code point instead of decoding it through the locale. (cherry picked from commit 003d362) (cherry picked from commit a75aa41) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com> Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>
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The non-ASCII tests only exercised what the runner's locale could encode (in practice UTF-8). Add 8-bit-encoding cases to the character and string I/O tests, each guarded by the existing encodability check: ASCII, a character common to the Latin encodings ('é'), and ones distinctive to a single encoding (byte 0xA4 is '¤' in ISO-8859-1, '€' in ISO-8859-15, 'є' in KOI8-U). Run the whole suite under different locales to cover them; unrepresentable cases skip.
Read each written character back with in_wch() or instr() rather than inch(), which on a wide build returns the low byte of the code point instead of the locale-encoded byte and so mangles a non-ASCII character of an 8-bit locale. This lets the int-argument cases cover '€'/'є', and adds matching coverage for the str argument.
insch() with an int byte > 127 is checked only for Latin-1: on a wide build ncurses winsch stores a printable byte directly as a code point instead of decoding it through the locale.
(cherry picked from commit 003d362)