# Adapted from script by Mark Lawrence (ref. rt.cpan.org #94830)

use strict;

use Digest::SHA qw(sha1);

package P1;

use vars qw(@ISA);

@ISA = ("Digest::SHA");

package main;

print "1..1\n";

my $data = 'a';

my $d = P1->new;

print "not " unless $d->add($data)->digest eq sha1($data);

print "ok 1\n";