test: skip IPv6 test on non-IPv6 systems

Until recently, test-dgram-address would fail on machines without IPv6
but still exit with a successful return code. (It would console.log()
the error but not actually fail.)

Now that the test has been updated such that it will fail the IPv6 part
of the test if there is an error event emitted by the socket, skip the
test on systems not equipped with IPv6.

PR-URL: https://github.com/nodejs/node/pull/11432
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Rod Vagg <rod@vagg.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/test/parallel/test-dgram-address.js b/test/parallel/test-dgram-address.js
index 3fad9cf6c6..c1f71ae8ab 100644
--- a/test/parallel/test-dgram-address.js
+++ b/test/parallel/test-dgram-address.js
@@ -26,7 +26,7 @@ const dgram = require('dgram');
   socket.bind(0, common.localhostIPv4);
 }
 
-{
+if (common.hasIPv6) {
   // IPv6 Test
   const socket = dgram.createSocket('udp6');
   const localhost = '::1';