CPAN::Groonga

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

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

use Scalar::Util 'refaddr';

subtest 'test the defined method' => sub {
  my $array   = Data::Object::Array->new([1, 2, undef, 4, 5]);
  my $defined = $array->defined(2);

  isnt refaddr($array), refaddr($defined);
  is $defined, 0;

  isa_ok $array,   'Data::Object::Array';
  isa_ok $defined, 'Data::Object::Number';

  $defined = $array->defined(1);

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

  isa_ok $array,   'Data::Object::Array';
  isa_ok $defined, 'Data::Object::Number';
};

ok 1 and done_testing;