CPAN::Groonga

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

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

use Scalar::Util 'refaddr';

subtest 'test the head method' => sub {
  my $array = Data::Object::Array->new([1 .. 5]);

  my @argument = ();
  my $head     = $array->head(@argument);

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

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

ok 1 and done_testing;