use strict;
use warnings;
use Data::Monad::List;
use Test::More;

ok eq_set(
    [scalar_list(1 ,2, 3)->flat_map(sub {
        scalar_list($_[0] + 1, $_[0] - 1)
    })->scalars],
    [0, 2, 1, 3, 2, 4]
);

is_deeply [Data::Monad::List->new([qw/x y/], [qw/a b/])->values],
          [[qw/x y/], [qw/a b/]];

done_testing;