$ prove -v hexdig2.t 
hexdig2.t .. 
Filename: /tmp/vO_5WGnJ2V
Filename: /tmp/3nw1qtQRAm
$VAR1 = [
          '24676db37df646bab175feedec39259d',
          '24676db37df646bab175feedec39259d'
        ];
ok 1 - Same md5_hex for /tmp/vO_5WGnJ2V and /tmp/3nw1qtQRAm
ok 2 - compare() indicates no differences between /tmp/vO_5WGnJ2V and /tmp/3nw1qtQRAm
1..2
ok
All tests successful.