# test search method
$obj->insert ( foo => 4, food => 5, fop => 6 );

# no args, returns all keys
is_deeply([$obj->search], ['foo', 'food', 'fop']);

# test min_key and max_key independently
is_deeply([$obj->search(min_key => 'food')], ['food', 'fop']);
is_deeply([$obj->search(max_key => 'food')], ['foo', 'food']);