From 1da3a31a5f0211db121e0df4ca456838a437537f Mon Sep 17 00:00:00 2001
From: Tanaka Akira <akr@fsij.org>
Date: Tue, 30 Jul 2019 11:59:54 +0900
Subject: Use lowercase letters for IPv6 addresses.

Reported by chucke (Tiago Cardoso).
Patch by jeremyevans0 (Jeremy Evans).
[Bug #14612]
---
 test/resolv/test_dns.rb | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'test')

diff --git a/test/resolv/test_dns.rb b/test/resolv/test_dns.rb
index fe1ab6ce79..d69bec8256 100644
--- a/test/resolv/test_dns.rb
+++ b/test/resolv/test_dns.rb
@@ -216,6 +216,22 @@ class TestResolvDNS < Test::Unit::TestCase
     assert_instance_of Resolv::IPv6, Resolv::IPv6.create('::1:127.0.0.1'), ref
   end
 
+  def test_ipv6_to_s
+    test_cases = [
+      ["2001::abcd:abcd:abcd", "2001::ABcd:abcd:ABCD"],
+      ["2001:db8::1", "2001:db8::0:1"],
+      ["::", "0:0:0:0:0:0:0:0"],
+      ["2001::", "2001::0"],
+      ["2001:db8::1:1:1:1:1", "2001:db8:0:1:1:1:1:1"],
+      ["1::1:0:0:0:1", "1:0:0:1:0:0:0:1"],
+      ["1::1:0:0:1", "1:0:0:0:1:0:0:1"],
+    ]
+
+    test_cases.each do |expected, ipv6|
+      assert_equal expected, Resolv::IPv6.create(ipv6).to_s
+    end
+  end
+
   def test_ipv6_should_be_16
     ref = '[rubygems:1626]'
 
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