added debug log

t/02_driver/data-dumper.t

@@ -3,6 +3,9 @@ use warnings;
 use Test::Requires 'Data::Dumper';
 use Data::Encoder::Data::Dumper;
 use Test::More;
+use t::Util;
+
+show_version('Data::Dumper');
 
 subtest 'simple' => sub {
     my $encoder = Data::Encoder::Data::Dumper->new;

t/02_driver/data-messagepack.t

@@ -3,6 +3,9 @@ use warnings;
 use Test::Requires 'Data::MessagePack';
 use Data::Encoder::Data::MessagePack;
 use Test::More;
+use t::Util;
+
+show_version('Data::MessagePack');
 
 subtest 'simple' => sub {
     my $encoder = Data::Encoder::Data::MessagePack->new;

t/02_driver/json.t

@@ -3,6 +3,9 @@ use warnings;
 use Test::Requires 'JSON';
 use Data::Encoder::JSON;
 use Test::More;
+use t::Util;
+
+show_version('JSON');
 
 subtest 'simple' => sub {
     my $encoder = Data::Encoder::JSON->new;

t/02_driver/storable.t

@@ -3,6 +3,9 @@ use warnings;
 use Test::Requires 'Storable';
 use Data::Encoder::Storable;
 use Test::More;
+use t::Util;
+
+show_version('Storable');
 
 subtest 'simple' => sub {
     my $encoder = Data::Encoder::Storable->new;

t/02_driver/yaml.t

@@ -3,6 +3,9 @@ use warnings;
 use Test::Requires 'YAML';
 use Data::Encoder::YAML;
 use Test::More;
+use t::Util;
+
+show_version('YAML');
 
 subtest 'simple' => sub {
     my $encoder = Data::Encoder::YAML->new;

t/Util.pm

@@ -0,0 +1,14 @@
+package t::Util;
+use strict;
+use warnings;
+use base 'Exporter';
+use Test::More;
+
+our @EXPORT = qw(show_version);
+
+sub show_version {
+    my $module = shift;
+    diag "$module: ", $module->VERSION;
+}
+
+1;