CPAN::Groonga

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

use_ok 'Data::Object::Code';
# deprecated
# can_ok 'Data::Object::Code', 'call';

use Scalar::Util 'refaddr';

subtest 'test the call method' => sub {
  my $code = Data::Object::Code->new(sub { (shift // 0) + 1 });
  my $call = $code->call(undef);

  my $result;

  isnt refaddr($code), refaddr($call);
  is $call, 1;

  $call = $code->call(0);
  isa_ok $call, 'Data::Object::Number';

  isnt refaddr($code), refaddr($call);
  is $call, 1;

  $call = $code->call(1);
  isa_ok $call, 'Data::Object::Number';

  isnt refaddr($code), refaddr($call);
  is $call, 2;

  $call = $code->call(2);
  isa_ok $call, 'Data::Object::Number';

  isnt refaddr($code), refaddr($call);
  is $call, 3;

  isa_ok $code, 'Data::Object::Code';
  isa_ok $call, 'Data::Object::Number';
};

ok 1 and done_testing;