1#!perl -w
2
3use strict;
4use Test::More;
5use Encode;
6
7use XS::APItest qw(utf16_to_utf8 utf16_to_utf8_reversed);
8
9for my $ord (0, 10, 13, 78, 255, 256, 0xD7FF, 0xE000, 0xFFFD,
10	     0x10000, 0x10FC00, 0x103FF, 0x10FFFD) {
11    my $chr = chr $ord;
12    for my $prefix ('', "\0", 'Perl rules') {
13	for my $suffix ('', "\0", "Moo!") {
14	    my $string = $prefix . $chr . $suffix;
15	    my $name = sprintf "for chr $ord prefix %d, suffix %d",
16		length $prefix, length $suffix;
17	    my $as_utf8 = encode('UTF-8', $string);
18	    is(utf16_to_utf8(encode('UTF-16BE', $string)), $as_utf8,
19	       "utf16_to_utf8 $name");
20	    is(utf16_to_utf8_reversed(encode('UTF-16LE', $string)), $as_utf8,
21	       "utf16_to_utf8_reversed $name");
22	}
23    }
24}
25
26foreach ("\0", 'N', 'Perl rules!') {
27    my $length = length $_;
28    my $got = eval {utf16_to_utf8($_)};
29    like($@, qr/^panic: utf16_to_utf8: odd bytelen $length at/,
30	 "Odd byte length panics for '$_'");
31    is($got, undef, 'hence eval returns undef');
32}
33
34for (["\xD8\0\0\0", 'NULs'],
35     ["\xD8\0\xD8\0", '2 Lows'],
36     ["\xDC\0\0\0", 'High NUL'],
37     ["\xDC\0\xD8\0", 'High Low'],
38     ["\xDC\0\xDC\0", 'High High'],
39    ) {
40    my ($malformed, $name) = @$_;
41    my $got = eval {utf16_to_utf8($malformed)};
42    like($@, qr/^Malformed UTF-16 surrogate at/,
43	 "Malformed surrogate $name croaks for utf16_to_utf8");
44    is($got, undef, 'hence eval returns undef');
45
46    $malformed =~ s/(.)(.)/$2$1/gs;
47    $got = eval {utf16_to_utf8_reversed($malformed)};
48    like($@, qr/^Malformed UTF-16 surrogate at/,
49	 "Malformed surrogate $name croaks for utf16_to_utf8_reversed");
50    is($got, undef, 'hence eval returns undef');
51}
52
53my $in = "NA";
54my $got = eval {utf16_to_utf8_reversed($in, 1)};
55like($@, qr/^panic: utf16_to_utf8_reversed: odd bytelen 1 at/,
56     'Odd byte length panics');
57is($got, undef, 'hence eval returns undef');
58is($in, "NA", 'and input unchanged');
59
60$in = "\xD8\0\xDC\0";
61$got = eval {utf16_to_utf8($in, 2)};
62like($@, qr/^Malformed UTF-16 surrogate at/, 'Lone surrogate croaks');
63(ok(!defined $got, 'hence eval returns undef')) or
64    diag(join ', ', map {ord $_} split //, $got);
65
66done_testing;
67