The regression test is missing from the 0.12 distribution.

Use the file t/run.t from github.
Index: t/run.t
--- t/run.t.orig
+++ t/run.t
@@ -0,0 +1,436 @@
+# -*-perl-*-
+use utf8;
+use Test::More;
+use Encode qw{ encode };
+
+require_ok( 'Data::Validate::Struct' );
+
+my $ref = {
+           'b1' => {
+                    'b2' => {
+                             'b3' => {
+                                      'item' => 'int'
+                                     }
+                            }
+                   },
+           'item' => [ 'number' ],
+           'v1' => 'int',
+           'v2' => 'number',
+           'v3' => 'word',
+           'v4' => 'line',
+           'v5' => 'text',
+           'v6' => 'hostname',
+           'v8' => 'user',
+           'v10' => 'port',
+           'v11' => 'uri',
+           'v12' => 'cidrv4',
+           'v13' => 'ipv4',
+           'v14' => 'path',
+           'v15' => 'fileexists',
+           'v16' => 'quoted',
+           'v171' => 'regex',
+           'v172' => 'regex',
+           'v18' => 'novars',
+           'v19' => 'ipv6',
+           'v20' => 'ipv6',
+           'v21' => 'ipv6',
+           'v22' => 'ipv6',
+           'v23' => 'ipv6',
+           'v24' => 'ipv6',
+           'v25' => 'ipv6',
+           'v26' => 'cidrv6',
+
+           'v27' => 'int | vars',
+           'v28' => 'int | vars',
+
+           'o1'  => 'int | optional',
+
+           'AoA' => [ [ 'int' ] ],
+
+           'AoH' => [
+                     {
+                      fullname => 'text', user => 'word', uid => 'int' }
+                    ],
+
+           'HoH' => {
+                     father   => { fullname => 'text', user => 'word' },
+                     son      => { fullname => 'text', user => 'word' },
+                     daughter => { fullname => 'text', user => 'word' },
+                    },
+
+           'r1' => 'range(80-90)',
+          };
+
+my $cfg =  {
+            'b1' => {
+                     'b2' => {
+                              'b3' => {
+                                       'item' => '100'
+                                      }
+                             }
+                    },
+            'item' => [
+                       '10',
+                       '20',
+                       '30'
+                      ],
+            'v1' => '123',
+            'v2' => '19.03',
+            'v3' => 'Johannes',
+            'v4' => 'this is a line of text',
+            'v5' => 'This is a text block
+                     This is a text block',
+            'v6' => 'search.cpan.org',
+            'v8' => 'root',
+            'v10' => '22',
+            'v11' => 'http://search.cpan.org/~tlinden/?ignore&not=1',
+            'v12' => '192.168.1.101/18',
+            'v13' => '10.0.0.193',
+            'v14' => '/etc/ssh/sshd.conf',
+            'v15' => 'MANIFEST',
+            'v16' => '\' this is a quoted string \'',
+            'v171' => qr([0-9]+),
+            'v172' => 'qr([0-9]+)',
+            'v18' => 'Doesnt contain any variables',
+            'v19' => '3ffe:1900:4545:3:200:f8ff:fe21:67cf',
+            'v20' => 'fe80:0:0:0:200:f8ff:fe21:67cf',
+            'v21' => 'fe80::200:f8ff:fe21:67cf',
+            'v22' => 'ff02:0:0:0:0:0:0:1',
+            'v23' => 'ff02::1',
+            'v24' => '::ffff:192.0.2.128',
+            'v25' => '::',
+            'v26' => '2001:db8:dead:beef::b00c/64',
+
+            'v27' => '10',
+            'v28' => '$ten',
+
+            'AoA' => [
+                      [ qw{ 10 11 12 13 } ],
+                      [ qw{ 20 21 22 23 } ],
+                      [ qw{ 30 31 32 33 } ],
+                     ],
+
+            'AoH' => [
+                      {
+                       fullname => 'Homer Simpson', user => 'homer', uid => 100 },
+                      {
+                       fullname => 'Bart Simpson',  user => 'bart',  uid => 101 },
+                      {
+                       fullname => 'Lisa Simpson',  user => 'lisa',  uid => 102 },
+                     ],
+
+            'HoH' => {
+                      father =>   { fullname => 'Homer Simpson', user => 'homer' },
+                      son =>      { fullname => 'Bart Simpson',  user => 'bart'  },
+                      daughter => { fullname => 'Lisa Simpson',  user => 'lisa'  },
+                     },
+
+            'r1' => 85,
+           };
+
+my $v = new_ok('Data::Validate::Struct', [ $ref ]);
+ok ($v->validate($cfg), "validate a reference against a OK config");
+
+
+# check failure matching
+my @failure = (
+               {
+                cfg  => q(acht),
+                type => q(int),
+                descr => 'int',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(27^8),
+                type => q(number),
+                descr => 'number',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(two words),
+                type => q(word),
+                descr => 'word',
+                errors => 1,
+               },
+
+               {
+                cfg  => qq(<<EOF\nzeile1\nzeile2\nzeile3\nEOF\n),
+                type => q(line),
+                descr => 'line',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(ätz),
+                type => q(hostname),
+                descr => 'hostname',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(gibtsnet123456790.intern),
+                type => q(resolvablehost),
+                descr => 'resolvablehost',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(äüö),
+                type => q(user),
+                descr => 'user',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(äüö),
+                type => q(group),
+                descr => 'group',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(234234444),
+                type => q(port),
+                descr => 'port',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(unknown:/unsinnüäö),
+                type => q(uri),
+                descr => 'uri',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(1.1.1.1/33),
+                type => q(cidrv4),
+                descr => 'cidrv4',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(300.1.1.1),
+                type => q(ipv4),
+                descr => 'ipv4',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(üäö),
+                type => q(fileexists),
+                descr => 'fileexists',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(not quoted),
+                type => q(quoted),
+                descr => 'quoted',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(no regex),
+                type => q(regex),
+                descr => 'regex',
+                errors => 1,
+               },
+
+               {
+                cfg  => q($contains some $vars),
+                type => q(novars),
+                descr => 'novars',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(2001:db8::dead::beef),
+                type => q(ipv6),
+                descr => 'ipv6',
+                errors => 1,
+               },
+
+               {
+                cfg  => q(2001:db8:dead:beef::1/129),
+                type => q(cidrv6),
+                descr => 'cidrv6',
+                errors => 1,
+               },
+
+               {
+                cfg => [
+                        [ qw{ 10 11 12 13 } ],
+                        [ qw{ 'twenty' 21 22 23 } ],
+                        [ qw{ 30 31 32.0 33 } ],
+                       ],
+
+                type => [ [ 'int' ] ],
+
+                descr => 'array of arrays',
+                errors => 2,
+               },
+
+               {
+                cfg => [
+                        {
+                         fullname => 'Homer Simpson', user => 'homer', uid => 100 },
+                        {
+                         fullname => 'Bart Simpson',  user => ':bart',  uid => 101 },
+                        {
+                         fullname => 'Lisa Simpson',  user => 'lisa',  uid => '102' },
+                       ],
+
+                type => [
+                         {
+                          fullname => 'text', user => 'word', uid => 'int' }
+                        ],
+
+                descr => 'array of hashes',
+                errors => 1,
+               },
+
+               {
+                cfg => {
+                        father   => { fullname => 'Homer Simpson', user => 'homer', uid => 100 },
+                        son      => { fullname => 'Bart Simpson',  user => 'bart',  uid => 'one hundred one' },
+                        daughter => { fullname => 'Lisa Simpson',  user => 'lisa:', uid => 'one hundred two' },
+                       },
+
+                type => {
+                         father   => { fullname => 'text', user => 'word', uid => 'int' },
+                         son      => { fullname => 'text', user => 'word', uid => 'int' },
+                         daughter => { fullname => 'text', user => 'word', uid => 'int' },
+                        },
+
+                descr => 'hash of hashes',
+                errors => 3,
+               },
+
+               {
+                cfg => {
+                        name    => 'Foo Bar',
+                        age     => 42,
+                       },
+
+                type => {
+                         name    => 'text',
+                         age     => 'int',
+                         address => 'text',
+                        },
+
+                descr => 'Missing required field',
+                errors => 1,
+               },
+
+               {
+                cfg => 100,
+                type => 'range(200-1000)',
+                descr => 'value outside dynamic range',
+                errors => 1,
+               },
+
+              );
+
+foreach my $test (@failure) {
+  my $ref    = { v => $test->{type} };
+  my $cfg    = { v => $test->{cfg}  };
+  my $v      = Data::Validate::Struct->new($ref);
+  #$v->debug();
+  my $result = $v->validate($cfg);
+  my $descr = encode('UTF-8',
+                     exists $test->{descr} ? $test->{descr} : $test->{cfg}
+                    );
+  my $errors = exists $test->{errors} ? $test->{errors} : 1;
+  unless ($result) {
+    is @{$v->errors}, $errors, "Caught failure for '$descr'";
+  } else {
+    fail("Couldn't catch invalid '$test->{descr}'");
+  }
+}
+
+
+# clean old object
+undef $v;
+$v = Data::Validate::Struct->new({
+                                  h1 => { h2 => { item => 'int' } }
+                                 });
+ok !$v->validate({
+                  h1 => { h2 => { item => 'qux' } }
+                 }), 'item is not an h1 => h2 => int';
+is $v->errstr, q{'qux' doesn't match 'int' at 'h1 => h2'}, 'correct error trace';
+
+
+# adding custom type
+my $ref3 = {
+            v1 => 'address',
+            v2 => 'list',
+            v3 => 'noob',
+            v4 => 'nonoob',
+           };
+my $cfg3 = {
+            v1 => 'Marblestreet 15',
+            v2 => 'a1, b2, b3',
+            v3 => 42,
+            v4 => 43,
+           };
+
+my $v3 = new Data::Validate::Struct($ref3);
+# add via hash
+note('added via hash');
+my %h = (
+         address => qr(^\w+\s\s*\d+$)
+        );
+$v3->type(%h);
+
+# add via hash ref
+note('added via hash ref');
+$v3->type({ list =>
+            sub {
+              my $list = $_[0];
+              my @list = split /\s*,\s*/, $list;
+              return scalar @list > 1;
+            }
+          });
+
+# add via key => value
+note('added via key => val');
+$v3->type(noob => sub { return $_[0] == 42 });
+
+ok($v3->validate($cfg3), "using custom types");
+
+
+# check if errors are not cached
+my $v4 = Data::Validate::Struct->new({age => 'int'});
+ok(!$v4->validate({age => 'eight'}), "cache check first run, error");
+ok($v4->validate({age => 8}), "cache check second run, no error");
+
+# optional array, see:
+# https://github.com/TLINDEN/Data-Validate-Struct/issues/7
+my $ref4 = {
+            routers => [ {
+                          stubs => [ {
+                                      network => 'ipv4',
+                                     }, {} ],
+                         }, {}, ],
+           };
+my $test4 = {
+               'routers' => [
+                             {
+                              'stubs' => [
+                                          {
+                                           'network' => '172.31.199.0',
+                                          }
+                                         ],
+                              'router' => '172.31.199.2', # optional, ignored by validate
+                             },
+                             { # optional as well
+                              'router' => '172.30.5.5',
+                             },
+                            ],
+              };
+my $v4 = Data::Validate::Struct->new($ref4);
+ok($v4->validate($test4), "check optional " . $Data::Validate::Struct::VERSION);
+done_testing();