From c4911b1f4d6c1e4b2a3c7f5a71a538b459bbe322 Mon Sep 17 00:00:00 2001
From: Marius Gavrilescu <marius@ieval.ro>
Date: Sat, 13 Jan 2018 21:52:56 +0200
Subject: [PATCH] Add debugging output

---
 lib/Slob.pm | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/lib/Slob.pm b/lib/Slob.pm
index 33516bd..9d78249 100644
--- a/lib/Slob.pm
+++ b/lib/Slob.pm
@@ -14,6 +14,9 @@ use Compress::Raw::Bzip2;
 use Compress::Raw::Lzma;
 use Compress::Raw::Zlib;
 
+# MD5 only used for debugging output in tests
+use Digest::MD5 qw/md5_hex/;
+
 our %UNCOMPRESS = (
 	'' => sub { $_[0] },
 	'lzma2' => sub {
@@ -156,8 +159,14 @@ sub ftell {
 }
 
 sub uncompress {
-	my ($self, $data) = @_;
-	$UNCOMPRESS{$self->{header}{compression}}->($data)
+       my ($self, $data) = @_;
+       my $compression = $self->{header}{compression};
+       if ($ENV{HARNESS_ACTIVE} && $compression eq 'lzma2') {
+               my $prefix = unpack 'H*', substr $data, 0, 10;
+               my $md5sum = md5_hex $data;
+               Test::More::diag "Uncompressing data starting '$prefix', md5sum $md5sum";
+       }
+       $UNCOMPRESS{$compression}->($data)
 }
 
 sub read_header {
-- 
2.39.2