CPAN::Groonga

use strict;
use warnings;
use Test::More;

use_ok 'Data::Object::Number';
# deprecated
# can_ok 'Data::Object::Number', 'neg';

use Scalar::Util 'refaddr';

subtest 'test the neg method' => sub {
  my $number = Data::Object::Number->new(12345);
  my $neg    = $number->neg();

  isnt refaddr($number), refaddr($neg);
  is $neg, -12345;

  isa_ok $number, 'Data::Object::Number';
  isa_ok $neg,    'Data::Object::Number';
};

ok 1 and done_testing;