Add debugging output

diff --git a/lib/Slob.pm b/lib/Slob.pm
index 33516bd2e83f2afe105771ed779f6bb73e618f5d..9d7824991469615e88ee8128715618cdd9e30f60 100644 (file)
--- 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 {