use strict;

use warnings;

use Test::More;

use Config;

BEGIN {

    plan skip_all => 'Perl compiled without ithreads'

        unless $Config{useithreads};

    plan skip_all => 'no threads.pm'

        unless eval { require threads };

    plan tests => 2;

}

use threads;

use Digest::MD5;

my $module = 'Digest::MD5';

my $obj = $module->new;

$obj->add("foo");

my $tdigest = threads->create(sub { $obj->add("bar"); $obj->hexdigest })->join;

isnt $obj->clone->hexdigest, $tdigest, "unshared object unaffected by the thread";

$obj->add("bar");

is $obj->clone->hexdigest, $tdigest;