use v6;
use Test;

=begin pod

This file was originally derived from the perl5 CPAN module Perl6::Rules,
version 0.3 (12 Apr 2004), file t/overlapping.t.

It probably needs a few syntax updates to remove p5isms

=end pod

plan 22;

#?pugs emit force_todo(2,3,5,6,10);

# should be: L<S05/Modifiers/With the new C<:ov> (C<:overlap>) modifier,>
# L<S05/Modifiers/match at all possible character positions>

my $str = "abrAcadAbbra";

my @expected = (
    [ 0, 'abrAcadAbbra' ],
    [ 3,    'AcadAbbra' ],
    [ 5,      'adAbbra' ],
    [ 7,        'Abbra' ],
);

#?rakudo todo 'm:overlap NYI'
{
    for (1..2) -> $rep {
         ok($str ~~ m:i:overlap/ a .+ a /, "Repeatable overlapping match ($rep)" );

        ok(@$/ == @expected, "Correct number of matches ($rep)" );
        my %expected; %expected{map {$_[1]}, @expected} = (1) x @expected;
        my %position; %position{map {$_[1]}, @expected} = map {$_[0]}, @expected;
        for (@$/) {
            ok( %expected{$_}, "Matched '$_' ($rep)" );
            ok( %position{$_} == $_.to, "At correct position of '$_' ($rep)" );
            %expected{$_} :delete;
        }
        ok(%expected.keys == 0, "No matches missed ($rep)" );
    }
}

#?rakudo skip "m:overlap// NYI"
{
    ok(!( "abcdefgh" ~~ m:overlap/ a .+ a / ), 'Failed overlapping match');
    ok(@$/ == 0, 'No matches');

    ok($str ~~ m:i:overlap/ a (.+) a /, 'Capturing overlapping match');

    ok(@$/ == @expected, 'Correct number of capturing matches');
    my %expected; %expected{@expected} = (1) x @expected;
    for (@$/) {
        my %expected; %expected{map {$_[1]}, @expected} = (1) x @expected;
        ok( $_[1] = substr($_[0],1,-1), "Captured within '$_'" );
        %expected{$_} :delete;
    }
}

{
    # $str eq abrAcadAbbra
    my @match = $str.match(/a .* a/, :ov).list;
    is +@match, 2, "Two matches found";
    is ~@match[0], "abrAcadAbbra", "First is abrAcadAbbra";
    is ~@match[1], "adAbbra", "Second is adAbbra";
}

{
    # $str eq abrAcadAbbra
    my @match = $str.match(/a .* a/, :overlap).list;
    is +@match, 2, "Two matches found";
    is ~@match[0], "abrAcadAbbra", "First is abrAcadAbbra";
    is ~@match[1], "adAbbra", "Second is adAbbra";
}

{
    my @match = "aababcabcd".match(/a .*/, :ov).list;
    is +@match, 4, "Four matches found";
    is ~@match[0], "aababcabcd", "First is aababcabcd";
    is ~@match[1], "ababcabcd", "Second is ababcabcd";
    is ~@match[2], "abcabcd", "Third is abcabcd";
    is ~@match[3], "abcd", "Last is abcd";
}

done;

# vim: ft=perl6
