CPAN::Groonga

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

use_ok 'Data::Object::Hash';
# deprecated
# can_ok 'Data::Object::Hash', 'defined';

use Scalar::Util 'refaddr';

subtest 'test the defined method' => sub {
  my $hash = Data::Object::Hash->new({1 .. 8, 9, undef});

  my @argument = (1);
  my $defined  = $hash->defined(@argument);

  isnt refaddr($hash), refaddr($defined);
  is $defined, 1;

  isa_ok $hash,    'Data::Object::Hash';
  isa_ok $defined, 'Data::Object::Number';
};

ok 1 and done_testing;