test: fix test failure on linux after edd2fcc

test/simple/test-net-connect-options-ipv6.js

@@ -22,19 +22,27 @@
 var common = require('../common');
 var assert = require('assert');
 var net = require('net');
+var dns = require('dns');
 
 var serverGotEnd = false;
 var clientGotEnd = false;
 
-var server = net.createServer({allowHalfOpen: true}, function(socket) {
+dns.lookup('localhost', 6, function(err) {
+  if (err) {
+    console.error('Looks like IPv6 is not really supported');
+    console.error(err);
+    return;
+  }
+
+  var server = net.createServer({allowHalfOpen: true}, function(socket) {
     socket.resume();
     socket.on('end', function() {
       serverGotEnd = true;
     });
     socket.end();
-});
+  });
 
-server.listen(common.PORT, '::1', function() {
+  server.listen(common.PORT, '::1', function() {
     var client = net.connect({
       host: 'localhost',
       port: common.PORT,
@@ -54,10 +62,11 @@ server.listen(common.PORT, '::1', function() {
         server.close();
       });
     });
-});
+  });
 
-process.on('exit', function() {
+  process.on('exit', function() {
     console.error('exit', serverGotEnd, clientGotEnd);
     assert(serverGotEnd);
     assert(clientGotEnd);
+  });
 });