test: fix test-dgram-udp6-link-local-address on Windows

Author: targos

test/parallel/test-dgram-udp6-link-local-address.js

@@ -8,10 +8,10 @@ const dgram = require('dgram');
 const os = require('os');
 
 function linklocal() {
-  for (const [ifname, entries] of Object.entries(os.networkInterfaces())) {
+  for (const entries of Object.values(os.networkInterfaces())) {
     for (const { address, family, scopeid } of entries) {
       if (family === 'IPv6' && address.startsWith('fe80:')) {
-        return { address, ifname, scopeid };
+        return { address, scopeid };
       }
     }
   }
@@ -21,7 +21,6 @@ const iface = linklocal();
 if (!iface)
   common.skip('cannot find any IPv6 interfaces with a link local address');
 
-const address = `${iface.address}%${iface.ifname}`;
 const message = 'Hello, local world!';
 
 // Create a client socket for sending to the link-local address.
@@ -32,7 +31,7 @@ const server = dgram.createSocket('udp6');
 
 server.on('listening', common.mustCall(() => {
   const port = server.address().port;
-  client.send(message, 0, message.length, port, address);
+  client.send(message, 0, message.length, port, iface.address);
 }));
 
 server.on('message', common.mustCall((buf, info) => {
@@ -42,10 +41,10 @@ server.on('message', common.mustCall((buf, info) => {
   // including the link local scope identifier.
   assert.strictEqual(
     info.address,
-    common.isWindows ? `${iface.address}%${iface.scopeid}` : address
+    common.isWindows ? `${iface.address}%${iface.scopeid}` : iface.address
   );
   server.close();
   client.close();
 }, 1));
 
-server.bind({ address });
+server.bind({ address: iface.address });