CPAN::Groonga

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

use_ok 'Data::Object::String';
# deprecated
# can_ok 'Data::Object::String', 'ucfirst';

use Scalar::Util 'refaddr';

subtest 'test the ucfirst method' => sub {
  my $string  = Data::Object::String->new('exciting');
  my $ucfirst = $string->ucfirst;

  isnt refaddr($string), refaddr($ucfirst);
  is "$ucfirst", 'Exciting';

  isa_ok $string,  'Data::Object::String';
  isa_ok $ucfirst, 'Data::Object::String';
};

ok 1 and done_testing;