use strict;
use Test::More;
use Hash::MultiValue;
my $hash = Hash::MultiValue->new(
foo => 'a',
foo => 'b',
bar => 'baz',
);
$hash->add(baz => 33);
is $hash->{baz}, 33;
my $new_hash = $hash->clone;
is_deeply $hash, $new_hash;
$new_hash->add('xyz' => 'zzy');
$hash->remove('foo');
is_deeply [ sort keys %$hash ], [ qw(bar baz) ];
is_deeply [ $hash->keys ], [ qw(bar baz) ];
$hash->add('bar'); # no-op add
is $hash->{'bar'}, 'baz';
$hash->clear;
is_deeply $hash, {};
isa_ok $hash, 'Hash::MultiValue';
done_testing;