use Test::More;
use strict; use warnings FATAL => 'all';

# also see t/05_typed/tuples.t

use List::Objects::WithUtils 'array';

my $arr = array( 1 .. 7 );
my $tuples = $arr->tuples(2);
is_deeply
  [ $tuples->all ],
  [
    [ 1, 2 ],
    [ 3, 4 ],
    [ 5, 6 ],
    [ 7 ]
  ],
  'tuples (pairs, odd elements) ok';

my $default = $arr->tuples;
is_deeply [ $default->all ], [ $tuples->all ],
  'tuples default 2 ok';

is_deeply
  [ array(1 .. 6)->tuples->all ],
  [
    [ 1, 2 ],
    [ 3, 4 ],
    [ 5, 6 ]
  ],
  'tuples (pairs, even elements) ok';

is_deeply
  [ array(1 .. 6)->tuples(6)->all ],
  [ [ 1 .. 6 ] ],
  'tuples (all) ok';

ok array->tuples(2)->is_empty, 'empty array tuples ok';

eval {; $arr->tuples(0) };
like $@, qr/positive/, 'tuples < 1 dies ok';

my $withbless = array(1..4)->tuples(2, undef, 'bless');
ok $withbless->count == 2, 'tuples (pairs, blessed) produced 2 tuples';
for (0,1) {
  isa_ok $withbless->get($_), 'List::Objects::WithUtils::Array', "tuple ($_)";
}
is_deeply
  [ $withbless->all ],
  [ [ 1, 2 ], [ 3, 4 ] ],
  'tuples (pairs, blessed) ok';

done_testing;