feh-bg.i

#!/usr/bin/env perl
use strict;
use warnings;
use 5.010;
use autodie qw/:all/;

use GD qw/:DEFAULT :cmp/;
use Test::More tests => 70;
use Time::HiRes qw/sleep/;

my ($pid_xnest, $pid_twm);

sub set_bg {
	my ($mode, $file) = @_;

	ok(
		system("feh --bg-${mode} test/bg/${file}") == 0,
		"Ran feh --bg-${mode} test/bg/${file}"
	);
}

sub same_files {
	my ($one, $two) = @_;

	my $img_one = GD::Image->new($one);
	my $img_two = GD::Image->new($two);

	return( ! ($img_one->compare($img_two) & GD_CMP_IMAGE));
}

sub check_bg {
	my ($file) = @_;

	system("import -silent -window root /tmp/feh_${$}.png");

	ok(
		same_files("test/bg/${file}", "/tmp/feh_${$}.png"),
		"Wallpaper is test/bg/${file}"
	);
}

if (($pid_xnest = fork()) == 0) {
	exec(qw( Xnest -geometry 500x500 :7 ));
}

sleep(0.5);

$ENV{'DISPLAY'} = ':7';

if (($pid_twm = fork()) == 0) {
	exec('twm');
}

sleep(0.5);

for my $mode (qw( center fill max scale tile )) {

	set_bg($mode, 'exact/in');
	check_bg('exact/out');

	for my $type (qw( exact small large )) {
		for my $orientation (qw( w h )) {

			set_bg($mode, "${type}/${orientation}/in");
			check_bg("${type}/${orientation}/${mode}");

		}
	}
}

kill(15, $pid_twm);
sleep(0.2);
kill(15, $pid_xnest);
sleep(0.2);

unlink("/tmp/feh_${$}.png");