test_rinda.rb: fix for unimplemented ifindex()

* test/rinda/test_rinda.rb (RingIPv6#prepare_ipv6):
  ifindex() function may not be implemented on Windows. We use another
  check for the case.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41602 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Mon Jun 24 22:26:31 2013  Hiroshi Shirosaki  <h.shirosaki@gmail.com>
+
+	* test/rinda/test_rinda.rb (RingIPv6#prepare_ipv6):
+	  ifindex() function may not be implemented on Windows. We use another
+	  check for the case.
+
 Mon Jun 24 22:11:37 2013  Hiroshi Shirosaki  <h.shirosaki@gmail.com>
 
 	* test/gdbm/test_gdbm.rb (TestGDBM#test_s_open_nolock):

test/rinda/test_rinda.rb

@@ -527,12 +527,18 @@ end
 
 module RingIPv6
   def prepare_ipv6(r)
-    Socket.getifaddrs.each do |ifaddr|
-      next unless ifaddr.addr
-      next unless ifaddr.addr.ipv6_linklocal?
-      next if ifaddr.name[0, 2] == "lo"
-      r.multicast_interface = ifaddr.ifindex
-      return
+    begin
+      Socket.getifaddrs.each do |ifaddr|
+        next unless ifaddr.addr
+        next unless ifaddr.addr.ipv6_linklocal?
+        next if ifaddr.name[0, 2] == "lo"
+        r.multicast_interface = ifaddr.ifindex
+        return
+      end
+    rescue NotImplementedError
+      # ifindex() function may not be implemented on Windows.
+      return if
+        Socket.ip_address_list.any? { |addrinfo| addrinfo.ipv6? }
     end
     skip 'IPv6 not available'
   end