--- /dev/null
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+use Test::More qw(no_plan);
+
+use lib 'ext/Font-TTF/lib';
+use Font::Subsetter;
+use Unicode::Normalize;
+
+# Test that we include characters needed for strings converted to NFC
+for my $str (
+ "i",
+ "\xec",
+ "i\x{0300}",
+ "\x{0300}i",
+ "\x{03b9}\x{0308}\x{0301}", # iota, combining diaeresis, combining acute
+ "s\x{0323}\x{0307}", # s, combining dot below, combining dot above
+ "s\x{0307}\x{0323}", # s, combining dot above, combining dot below
+ "\x{1e61}\x{0323}", # s with dot above, combining dot below
+ "\x{1e63}\x{0307}", # s with dot below, combining dot above
+ "\x{212b}", # angstrom
+) {
+ my $subsetter = new Font::Subsetter;
+ my %chars = $subsetter->expand_wanted_chars($str);
+ for (map ord, split //, $str) {
+ ok($chars{$_}, "char ".(sprintf '%04x', $_)." in string '".(join ' ', map { sprintf '%04x', $_ } unpack 'U*', $str)."'");
+ }
+ for (map ord, split //, Unicode::Normalize::NFC($str)) {
+ ok($chars{$_}, "NFC char ".(sprintf '%04x', $_)." in string '".(join ' ', map { sprintf '%04x', $_ } unpack 'U*', $str)."'");
+ }
+}
+
+# Test that spurious characters aren't included
+for my $str (
+ "a\xec",
+) {
+ my $subsetter = new Font::Subsetter;
+ my %chars = $subsetter->expand_wanted_chars($str);
+ my %exp;
+ $exp{$_} = 1 for map ord, split //, $str;
+ $exp{$_} = 1 for map ord, split //, Unicode::Normalize::NFC($str);
+ for (sort keys %chars) {
+ ok($exp{$_}, "expected char ".(sprintf '%04x', $_)." from string '".(join ' ', map { sprintf '%04x', $_ } unpack 'U*', $str)."'");
+ }
+}