t/nntpd*.t: skip TLS tests for old Net::NNTP

Perl prior to 5.22 did not bundle a Net::NNTP (or libnet)
capable of handling TLS.

1 files changed, 7 insertions, 2 deletions

diff --git a/t/nntpd.t b/t/nntpd.t
index 6cba2be4..bf5bb883 100644
--- a/t/nntpd.t
+++ b/t/nntpd.t
@@ -106,8 +106,13 @@ EOF
         is_deeply($list, { $group => [ qw(1 1 n) ] }, 'LIST works');
         is_deeply([$n->group($group)], [ qw(0 1 1), $group ], 'GROUP works');
         is_deeply($n->listgroup($group), [1], 'listgroup OK');
-        ok(!$n->starttls, 'STARTTLS fails when unconfigured');
-        is($n->code, 580, 'got 580 code on server w/o TLS');
+
+        SKIP: {
+                $n->can('starttls') or
+                        skip('Net::NNTP too old to support STARTTLS', 2);
+                ok(!$n->starttls, 'STARTTLS fails when unconfigured');
+                is($n->code, 580, 'got 580 code on server w/o TLS');
+        };
 
         %opts = (
                 PeerAddr => $host_port,