CPAN::Groonga

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

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

use Scalar::Util 'refaddr';

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

  my @argument       = (1, 3);
  my $filter_include = $hash->filter_include(@argument);

  isnt refaddr($hash), refaddr($filter_include);
  is_deeply $filter_include, {1 => 2, 3 => 4};

  isa_ok $hash,           'Data::Object::Hash';
  isa_ok $filter_include, 'Data::Object::Hash';
};

ok 1 and done_testing;