use XML::DifferenceMarkup qw(make_diff merge_diff);
use XML::LibXML;

use strict;
use vars qw(*F);

our ($path, @files, $testcount);

BEGIN
{
    $path = "testdata/roundup";
    @files = glob "$path/*.xml";
    $testcount = scalar(@files) / 3;
}

use Test::More tests => 2 * $testcount;

my $parser = XML::LibXML->new();
$parser->keep_blanks(0);

my $i = 0;
while ($i < $testcount) {

    my $n = sprintf("%02d", $i);

    my $a = $parser->parse_file("$path/$n" . "a.xml");

    open(F, "$path/$n" . "b.xml");
    my $serb = join '', <F>;
    my $b = $parser->parse_string($serb);

    open(F, "$path/$n" . "d.xml");
    my $serd = join '', <F>;

    my $diff = make_diff($a, $b);
    is($diff->toString(1), $serd, "diff $n?.xml");

    my $merge = merge_diff($a, $diff);
    is($merge->toString(1), $serb, "merge $n?.xml");

    ++$i;
}