use strict; use warnings;
use Lowu 'hash';
my $hs = hash(a => 1, b => 2, c => 3, d => 4);
my $rev = $hs->inverted;
my $val = $hs->random_value;
ok $rev->exists($val), 'random_value exists in hash';
my @r = hash->random_value;
ok @r == 1 && !defined $r[0], 'empty hash returns undef random_value';
done_testing