use strict;

use warnings;
use Test::More;

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

use Scalar::Util 'refaddr';

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

  my $keys     = [];
  my @argument = (sub { my $index = shift; push @{$keys}, $index; });
  my $each_key = $array->each_key(@argument);

  # depreceated
  # is refaddr($array), refaddr($each_key);

  # updated: return value is a collection
  is_deeply $each_key, [1, 2, 3, 4, 5, 6, 7];

  is_deeply $keys, [qw(0 1 2 3 4 5 6)];

  isa_ok $array,    'Data::Object::Array';
  isa_ok $each_key, 'Data::Object::Array';
};

ok 1 and done_testing;