use strict;
use warnings;
use utf8 ;

use Encode;
use Data::Dump qw/dd pp/;
use Devel::Peek;
use MIME::Base64 ;
use open IO => ':encoding(UTF-8)', ':std';


roundtrip($_) for 'Ä', 'ř';



sub roundtrip {

   my $orig = shift;

   warn "\n\n****** START\n";
   peek( orig => $orig);


   my $encode_utf8 = Encode::encode_utf8($orig);
   peek (encode_utf8 =>$encode_utf8);


   my $encode_b64 = MIME::Base64::encode_base64($encode_utf8);
   peek(encode_b64=>$encode_b64);

   my $decode_b64 = MIME::Base64::decode_base64($encode_b64);
   peek (decode_b64=>$decode_b64);


   my $decode_utf8 = Encode::decode_utf8($decode_b64);
   peek (decode_utf8 => $decode_utf8);
}


sub peek {
   my ($name,$str) = @_;
   my (undef, $file, $line) = caller(0);
   my $pp = pp($str);
   warn "\n*** $name = '$str' = $pp at $file line $line\n";
   Dump $_[1];

}