#!/usr/bin/perl

use strict;
use warnings;

my @tests;
for (glob "test*[0-9]") {
    push @tests, $_ if -e "$_.ans";
}

my $num_failed=0;

for my $test (@tests) {
    `./$test > $test.out 2> $test.err`;
    `diff $test.out $test.ans`;
    print "$test failed\n" if $?;
    $num_failed++ if $?;
    unlink "$test.err" if -z "$test.err";
}

print scalar @tests . " tests conducted, $num_failed failed.\n";
exit $num_failed;