+is(titlepage("foo bar\xACbaz"), "foo_bar__172__baz", 'U+00AC is in Latin-1 range');
+is(titlepage("foo bar\x{04D2}baz"), "foo_bar\x{04D2}baz", 'U+04D2 is alphanumeric');
+is(titlepage("foo bar\x{2260}baz"), "foo_bar__8800__baz", 'U+2260 is nonalphanumeric');
+is(titlepage("中文"), "中文", 'Chinese');
+is(titlepage("Кириллица"), "Кириллица", 'Cyrillic');
+is(titlepage("foo bar\x{0001F4A9}baz"), "foo_bar__128169__baz", 'U+1F4A9 is outside BMP');
+
+done_testing;