use strict; use Test::More tests => 1; use File::Spec; use Digest::Whirlpool; my $path = File::Spec->catfile( qw< t file.test > ); open INFILE, $path; my $whirlpool = Digest::Whirlpool->new; $whirlpool->addfile( *INFILE ); like $whirlpool->clone->hexdigest, qr/^f1d/, "adding two items to the first one";