#!perl
use 5.14.0;
use warnings;
use Carp;
use Data::Dumper;
use Digest::MD5;
use File::Compare (qw| compare |);
use File::Temp qw( tempfile );
use Test::More;

my $basic       = 'x' x 10**2;
my @digests;

my $t3 = File::Temp->new( UNLINK => 0);
for (1..100) { say $t3 $basic }
push @digests, hexdigest_one_file($t3);

my $t4 = File::Temp->new( UNLINK => 0);
for (1..100) { say $t4 $basic }
push @digests, hexdigest_one_file($t4);

say Dumper [ @digests ];

cmp_ok($digests[0], 'eq', $digests[1],
    "Same md5_hex for $t3 and $t4");

is(compare($t3, $t4), 0, "compare() indicates no differences between $t3 and $t4");

done_testing();

sub hexdigest_one_file {
    my $filename = shift;
    say "Filename: $filename";
    my $state = Digest::MD5->new();
    open my $FH, '<', $filename or croak "Unable to open $filename for reading";
    $state->addfile($FH);
    close $FH or croak "Unable to close $filename after reading";
    return $state->hexdigest;
}