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Reinstate and fix failing POSIX mb.t test
[perl5.git] / ext / POSIX / t / mb.t
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1#!./perl
2
3# These tests are in a separate file, because they use fresh_perl_is()
4# from test.pl.
5
6# The mb* functions use the "underlying locale" that is not affected by
7# the Perl one. So we run the tests in a separate "fresh_perl" process
8# with the correct LC_CTYPE set in the environment.
9
10BEGIN {
11 require Config; import Config;
12 if ($^O ne 'VMS' and $Config{'extensions'} !~ /\bPOSIX\b/) {
13 print "1..0\n";
14 exit 0;
15 }
16 unshift @INC, "../../t";
17 require 'loc_tools.pl';
ac542e2e 18 require 'charset_tools.pl';
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19 require 'test.pl';
20}
21
02b8575c 22plan tests => 4;
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23
24use POSIX qw();
25
26SKIP: {
02b8575c 27 skip("mblen() not present", 4) unless $Config{d_mblen};
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28
29 is(&POSIX::mblen("a", &POSIX::MB_CUR_MAX), 1, 'mblen() basically works');
30
02b8575c 31 skip("LC_CTYPE locale support not available", 3)
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32 unless locales_enabled('LC_CTYPE');
33
34 my $utf8_locale = find_utf8_ctype_locale();
02b8575c 35 skip("no utf8 locale available", 3) unless $utf8_locale;
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36
37 local $ENV{LC_CTYPE} = $utf8_locale;
38 local $ENV{LC_ALL};
39 delete $ENV{LC_ALL};
40
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41 fresh_perl_like(
42 'use POSIX; print &POSIX::MB_CUR_MAX',
43 qr/[4-6]/, {}, 'MB_CUR_MAX is at least 4 in a UTF-8 locale');
44
25d7b7aa 45 fresh_perl_is(
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46 'use POSIX; print &POSIX::mblen("'
47 . I8_to_native("\x{c3}\x{28}")
97198b30 48 . '", 2)',
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49 -1, {}, 'mblen() recognizes invalid multibyte characters');
50
51 fresh_perl_is(
97198b30 52 'use POSIX; print &POSIX::mblen("\N{GREEK SMALL LETTER SIGMA}", 2)',
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53 2, {}, 'mblen() works on UTF-8 characters');
54}