From 9e05af7d3108a3d7b00a4b3802c06c4cabc41d88 Mon Sep 17 00:00:00 2001
From: Junliang Yan <jyan@ca.ibm.com>
Date: Fri, 23 Oct 2015 12:48:36 -0400
Subject: [PATCH] test: print helpful err msg on test-dns-ipv6.js

The test sometimes fail on an assertion but no useful error message
was generated for debugging. Modify the test to generate useful
debugging message.

PR-URL: https://github.com/nodejs/node/pull/3501
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
---
 test/internet/test-dns-ipv6.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/test/internet/test-dns-ipv6.js b/test/internet/test-dns-ipv6.js
index 5a66f8db783f4b..27547edcd84b46 100644
--- a/test/internet/test-dns-ipv6.js
+++ b/test/internet/test-dns-ipv6.js
@@ -165,7 +165,8 @@ TEST(function test_lookup_all_ipv6(done) {
     assert.ok(ips.length > 0);
 
     ips.forEach(function(ip) {
-      assert.ok(isIPv6(ip.address));
+      assert.ok(isIPv6(ip.address),
+                'Invalid IPv6: ' + ip.address.toString());
       assert.strictEqual(ip.family, 6);
     });