BEGIN {
    unless ("A" eq pack('U', 0x41)) {
	print "1..0 # Unicode::Normalize " .
	    "cannot stringify a Unicode code point\n";
	exit 0;
    }
}

BEGIN {
    if ($ENV{PERL_CORE}) {
        chdir('t') if -d 't';
        @INC = $^O eq 'MacOS' ? qw(::lib) : qw(../lib);
    }
}

#########################

use Test;
use strict;
use warnings;
BEGIN { plan tests => 64 };
use Unicode::Normalize qw(normalize);
ok(1); # If we made it this far, we're ok.

sub _pack_U   { Unicode::Normalize::pack_U(@_) }
sub _unpack_U { Unicode::Normalize::unpack_U(@_) }

#########################

ok(normalize('D', ""), "");
ok(normalize('C', ""), "");
ok(normalize('KD',""), "");
ok(normalize('KC',""), "");

ok(normalize('D', "A"), "A");
ok(normalize('C', "A"), "A");
ok(normalize('KD',"A"), "A");
ok(normalize('KC',"A"), "A");

ok(normalize('NFD', ""), "");
ok(normalize('NFC', ""), "");
ok(normalize('NFKD',""), "");
ok(normalize('NFKC',""), "");

ok(normalize('NFD', "A"), "A");
ok(normalize('NFC', "A"), "A");
ok(normalize('NFKD',"A"), "A");
ok(normalize('NFKC',"A"), "A");

# don't modify the source
my $sNFD = "\x{FA19}";
ok(normalize('NFD', $sNFD), "\x{795E}");
ok($sNFD, "\x{FA19}");

my $sNFC = "\x{FA1B}";
ok(normalize('NFC', $sNFC), "\x{798F}");
ok($sNFC, "\x{FA1B}");

my $sNFKD = "\x{FA1E}";
ok(normalize('NFKD', $sNFKD), "\x{7FBD}");
ok($sNFKD, "\x{FA1E}");

my $sNFKC = "\x{FA26}";
ok(normalize('NFKC', $sNFKC), "\x{90FD}");
ok($sNFKC, "\x{FA26}");

sub hexNFC {
  join " ", map sprintf("%04X", $_),
  _unpack_U normalize 'C', _pack_U map hex, split ' ', shift;
}
sub hexNFD {
  join " ", map sprintf("%04X", $_),
  _unpack_U normalize 'D', _pack_U map hex, split ' ', shift;
}

ok(hexNFD("1E14 AC01"), "0045 0304 0300 1100 1161 11A8");
ok(hexNFD("AC00 AE00"), "1100 1161 1100 1173 11AF");

ok(hexNFC("0061 0315 0300 05AE 05C4 0062"), "00E0 05AE 05C4 0315 0062");
ok(hexNFC("00E0 05AE 05C4 0315 0062"),      "00E0 05AE 05C4 0315 0062");
ok(hexNFC("0061 05AE 0300 05C4 0315 0062"), "00E0 05AE 05C4 0315 0062");
ok(hexNFC("0045 0304 0300 AC00 11A8"), "1E14 AC01");
ok(hexNFC("1100 1161 1100 1173 11AF"), "AC00 AE00");
ok(hexNFC("1100 0300 1161 1173 11AF"), "1100 0300 1161 1173 11AF");

ok(hexNFD("0061 0315 0300 05AE 05C4 0062"), "0061 05AE 0300 05C4 0315 0062");
ok(hexNFD("00E0 05AE 05C4 0315 0062"),      "0061 05AE 0300 05C4 0315 0062");
ok(hexNFD("0061 05AE 0300 05C4 0315 0062"), "0061 05AE 0300 05C4 0315 0062");
ok(hexNFC("0061 05C4 0315 0300 05AE 0062"), "0061 05AE 05C4 0300 0315 0062");
ok(hexNFC("0061 05AE 05C4 0300 0315 0062"), "0061 05AE 05C4 0300 0315 0062");
ok(hexNFD("0061 05C4 0315 0300 05AE 0062"), "0061 05AE 05C4 0300 0315 0062");
ok(hexNFD("0061 05AE 05C4 0300 0315 0062"), "0061 05AE 05C4 0300 0315 0062");
ok(hexNFC("0000 0041 0000 0000"), "0000 0041 0000 0000");
ok(hexNFD("0000 0041 0000 0000"), "0000 0041 0000 0000");

ok(hexNFC("AC00 11A7"), "AC00 11A7");
ok(hexNFC("AC00 11A8"), "AC01");
ok(hexNFC("AC00 11A9"), "AC02");
ok(hexNFC("AC00 11C2"), "AC1B");
ok(hexNFC("AC00 11C3"), "AC00 11C3");

# Test Cases from Public Review Issue #29: Normalization Issue
# cf. http://www.unicode.org/review/pr-29.html
ok(hexNFC("0B47 0300 0B3E"), "0B47 0300 0B3E");
ok(hexNFC("1100 0300 1161"), "1100 0300 1161");

ok(hexNFC("0B47 0B3E 0300"), "0B4B 0300");
ok(hexNFC("1100 1161 0300"), "AC00 0300");

ok(hexNFC("0B47 0300 0B3E 0327"), "0B47 0300 0B3E 0327");
ok(hexNFC("1100 0300 1161 0327"), "1100 0300 1161 0327");

ok(hexNFC("0300 0041"), "0300 0041");
ok(hexNFC("0300 0301 0041"), "0300 0301 0041");
ok(hexNFC("0301 0300 0041"), "0301 0300 0041");
ok(hexNFC("0000 0300 0000 0301"), "0000 0300 0000 0301");
ok(hexNFC("0000 0301 0000 0300"), "0000 0301 0000 0300");

ok(hexNFC("0327 0061 0300"), "0327 00E0");
ok(hexNFC("0301 0061 0300"), "0301 00E0");
ok(hexNFC("0315 0061 0300"), "0315 00E0");
ok(hexNFC("0000 0327 0061 0300"), "0000 0327 00E0");
ok(hexNFC("0000 0301 0061 0300"), "0000 0301 00E0");
ok(hexNFC("0000 0315 0061 0300"), "0000 0315 00E0");