BEGIN {
    chdir 't' if -d 't';
    require './test.pl';
    set_up_inc('../lib');
}

use strict;
use warnings;

$|=1;

# The Script_Extension property has only recently become reasonably stable, so
# later Unicode releases may change things.   Some of these tests were
# designed to provide more code covereage in regexec.c, so changes in it or
# later Standards could cause them to not test what they originally were aimed
# to do.

no warnings "experimental::script_run";

my $script_run = qr/ ^ (+script_run: .+ ) $ /x;

unlike("\N{CYRILLIC SMALL LETTER ER}\N{CYRILLIC SMALL LETTER A}\N{CYRILLIC SMALL LETTER U}}\N{CYRILLIC SMALL LETTER ER}\N{CYRILLIC SMALL LETTER A}l", $script_run, "Cyrillic 'paypal' with a Latin 'l' is not a script run");
unlike("A\N{GREEK CAPITAL LETTER GAMMA}", $script_run, "Latin followed by Greek isn't a script run");

like("\N{CYRILLIC THOUSANDS SIGN}\N{COMBINING CYRILLIC TITLO}", $script_run, "Cyrillic followed by Permic-Arabic is Arabic");
like("\N{OLD PERMIC LETTER AN}\N{COMBINING CYRILLIC TITLO}", $script_run, "Permic followed by Permic-Arabic is Permic");
unlike("\N{GLAGOLITIC CAPITAL LETTER AZU}\N{COMBINING CYRILLIC TITLO}", $script_run, "Glagolithic followed by Permic-Arabic isn't a script run");

like("\N{CYRILLIC THOUSANDS SIGN}\N{COMBINING CYRILLIC PALATALIZATION}", $script_run, "Cyrillic followed by Glagolithic-Arabic is Arabic");
like("\N{GLAGOLITIC CAPITAL LETTER AZU}\N{COMBINING CYRILLIC PALATALIZATION}", $script_run, "Glagolithic followed by Glagolithic-Arabic is Glagolithic");
unlike("\N{OLD PERMIC LETTER AN}\N{COMBINING CYRILLIC PALATALIZATION}", $script_run, "Permic followed by Glagolithic-Arabic isn't a script run");

like("\N{ARABIC-INDIC DIGIT ZERO}\N{ARABIC-INDIC DIGIT ONE}\N{ARABIC-INDIC DIGIT TWO}\N{ARABIC-INDIC DIGIT THREE}\N{ARABIC COMMA}\N{ARABIC-INDIC DIGIT FOUR}\N{THAANA LETTER HAA}", $script_run, "Arabic-Thaana chars followed by Thaana is Thaana");
unlike("\N{ARABIC-INDIC DIGIT ZERO}\N{ARABIC-INDIC DIGIT ONE}A", $script_run, "Arabic-Thaana chars followed by Latin isn't a script run");
like("\N{ARABIC-INDIC DIGIT ZERO}\N{ARABIC-INDIC DIGIT ONE}\N{ARABIC-INDIC DIGIT TWO}\N{ARABIC-INDIC DIGIT THREE}\N{ARABIC COMMA}\N{ARABIC-INDIC DIGIT FOUR}\N{ARABIC NUMBER SIGN}", $script_run, "Arabic-Thaana chars followed by Arabic is Arabic");
unlike("\N{ARABIC-INDIC DIGIT ZERO}\N{ARABIC-INDIC DIGIT ONE}\N{ARABIC-INDIC DIGIT TWO}\N{ARABIC-INDIC DIGIT THREE}\N{EXTENDED ARABIC-INDIC DIGIT NINE}", $script_run, "Arabic-Thaana digits followed by an Arabic digit from a different sequence isn't a script run");
like("\N{ARABIC-INDIC DIGIT ZERO}\N{ARABIC-INDIC DIGIT ONE}\N{ARABIC-INDIC DIGIT TWO}\N{ARABIC-INDIC DIGIT THREE}\N{THAANA LETTER HAA}", $script_run, "Arabic-Thaana digits followed by a Thaana leter is a script run");

# The next tests are at a hard-coded boundary in regexec.c at the time of this
# writing (U+02B9/02BA).
like("abc\N{MODIFIER LETTER SMALL Y}", $script_run, "All Latin is a script run");
like("abc\N{MODIFIER LETTER PRIME}", $script_run, "Latin then Common is a script run");
like(":a", $script_run, "Common then Latin is a script run");
like("\N{HEBREW LETTER ALEF}\N{HEBREW LETTER TAV}\N{MODIFIER LETTER PRIME}", $script_run, "Hebrew then Common is a script run");
unlike("\N{HEBREW LETTER ALEF}\N{HEBREW LETTER TAV}\N{MODIFIER LETTER SMALL Y}", $script_run, "Hebrew then Latin isn't a script run");
like("9876543210\N{DESERET SMALL LETTER WU}", $script_run, "0-9 are the digits for Deseret");
like("\N{DESERET SMALL LETTER WU}9876543210", $script_run, "Also when they aren't in the initial position");
unlike("\N{DESERET SMALL LETTER WU}\N{FULLWIDTH DIGIT FIVE}", $script_run, "Fullwidth digits aren't the digits for Deseret");
unlike("\N{FULLWIDTH DIGIT SIX}\N{DESERET SMALL LETTER LONG I}", $script_run, "... likewise if the digits come first");

like("1234567890\N{ARABIC LETTER ALEF}", $script_run, "[0-9] work for Arabic");
unlike("1234567890\N{ARABIC LETTER ALEF}\N{ARABIC-INDIC DIGIT FOUR}\N{ARABIC-INDIC DIGIT FIVE}", $script_run, "... but not in combination with real ARABIC digits");
unlike("\N{ARABIC LETTER ALEF}\N{ARABIC-INDIC DIGIT SIX}\N{ARABIC-INDIC DIGIT SEVEN}1", $script_run, "... nor when the ARABIC digits come before them");

# This exercises the case where the script zero but not the script is
# ambiguous until a non-ambiguous digit is found.
like("\N{ARABIC LETTER ALEF}\N{EXTENDED ARABIC-INDIC DIGIT EIGHT}", $script_run, "ARABIC with a Shia digit is a script run");

like("\N{U+03A2}", $script_run, "A single unassigned code point is a script run");
unlike("\N{U+03A2}\N{U+03A2}", $script_run, "But not more than one");
unlike("A\N{U+03A2}", $script_run, "... and not in combination with an assigned one");
unlike("\N{U+03A2}A", $script_run, "... in either order");

like("A\N{COMBINING GRAVE ACCENT}", $script_run, "An inherited script matches others");
like("\N{COMBINING GRAVE ACCENT}A", $script_run, "... even if first in the sequence");

like("\N{DEVANAGARI DOUBLE DANDA}\N{DEVANAGARI DANDA}\N{DEVANAGARI STRESS SIGN UDATTA}\N{DEVANAGARI STRESS SIGN ANUDATTA}\N{NORTH INDIC FRACTION ONE QUARTER}\N{NORTH INDIC QUANTITY MARK}", $script_run, "A bunch of narrowing down of multiple possible scripts");

unlike("\N{JAVANESE PANGRANGKEP}\N{GEORGIAN PARAGRAPH SEPARATOR}", $script_run, "Two code points each in multiple scripts that don't intersect aren't a script run");
like("\N{DEVANAGARI SIGN CANDRABINDU VIRAMA}\N{VEDIC TONE YAJURVEDIC KATHAKA INDEPENDENT SVARITA}", $script_run, "Two code points each in multiple scripts that 't intersect singly are a script run");

use utf8;

# From UTS 39
like("写真だけの結婚式", $script_run, "Mixed Hiragana and Han");

done_testing();