diff options
Diffstat (limited to 'tests/test-wcwidth.c')
| -rw-r--r-- | tests/test-wcwidth.c | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/tests/test-wcwidth.c b/tests/test-wcwidth.c index f0eb7ab4..c2be2f32 100644 --- a/tests/test-wcwidth.c +++ b/tests/test-wcwidth.c @@ -1,5 +1,5 @@ /* Test of wcwidth() function. - Copyright (C) 2007-2018 Free Software Foundation, Inc. + Copyright (C) 2007-2022 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -35,10 +35,12 @@ main () { wchar_t wc; -#ifdef C_CTYPE_ASCII +#if !GNULIB_WCHAR_SINGLE_LOCALE +# ifdef C_CTYPE_ASCII /* Test width of ASCII characters. */ for (wc = 0x20; wc < 0x7F; wc++) ASSERT (wcwidth (wc) == 1); +# endif #endif /* Switch to an UTF-8 locale. */ @@ -67,9 +69,29 @@ main () #endif /* Test width of some zero width characters. */ - ASSERT (wcwidth (0x200B) == 0); + /* While it is desirable that U+200B, U+200C, U+200D have width 0, + because this makes wcswidth work better on strings that contain these + characters, it is acceptable if an implementation treats these + characters like control characters. */ + ASSERT (wcwidth (0x200B) <= 0); ASSERT (wcwidth (0xFEFF) <= 0); + /* Test width of some math symbols. + U+2202 is marked as having ambiguous width (A) in EastAsianWidth.txt + (see <https://www.unicode.org/Public/12.0.0/ucd/EastAsianWidth.txt>). + The Unicode Standard Annex 11 + <https://www.unicode.org/reports/tr11/tr11-36.html> + says + "Ambiguous characters behave like wide or narrow characters + depending on the context (language tag, script identification, + associated font, source of data, or explicit markup; all can + provide the context). If the context cannot be established + reliably, they should be treated as narrow characters by default." + For wcwidth(), the only available context information is the locale. + "fr_FR.UTF-8" is a Western locale, not an East Asian locale, therefore + U+2202 should be treated like a narrow character. */ + ASSERT (wcwidth (0x2202) == 1); + /* Test width of some CJK characters. */ ASSERT (wcwidth (0x3000) == 2); ASSERT (wcwidth (0xB250) == 2); |