test: fix test-dns-idna2008

The DNS server will sometimes return an IPv6 address (as seen in nightly
CI from time to time). Use `family` option to force IPv4.

PR-URL: #33367
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

test/internet/test-dns-idna2008.js

@@ -16,31 +16,37 @@ const { addresses } = require('../common/internet');
 const fixture = {
   hostname: 'straße.de',
   expectedAddress: '81.169.145.78',
-  dnsServer: addresses.DNS4_SERVER
+  dnsServer: addresses.DNS4_SERVER,
+  family: 4,
 };
 
-// Explicitly use well behaved DNS servers that are known to be able to resolve
+// Explicitly use well-behaved DNS servers that are known to be able to resolve
 // the query (which is a.k.a xn--strae-oqa.de).
 dns.setServers([fixture.dnsServer]);
 
-dns.lookup(fixture.hostname, mustCall((err, address) => {
-  if (err && err.errno === 'ESERVFAIL') {
-    assert.ok(err.message.includes('queryA ESERVFAIL straße.de'));
-    return;
-  }
-  assert.ifError(err);
-  assert.strictEqual(address, fixture.expectedAddress);
-}));
+dns.lookup(
+  fixture.hostname,
+  { family: fixture.family },
+  mustCall((err, address) => {
+    if (err && err.errno === 'ESERVFAIL') {
+      assert.ok(err.message.includes('queryA ESERVFAIL straße.de'));
+      return;
+    }
+    assert.ifError(err);
+    assert.strictEqual(address, fixture.expectedAddress);
+  })
+);
 
-dns.promises.lookup(fixture.hostname).then(({ address }) => {
-  assert.strictEqual(address, fixture.expectedAddress);
-}, (err) => {
-  if (err && err.errno === 'ESERVFAIL') {
-    assert.ok(err.message.includes('queryA ESERVFAIL straße.de'));
-  } else {
-    throw err;
-  }
-}).finally(mustCall());
+dns.promises.lookup(fixture.hostname, { family: fixture.family })
+  .then(({ address }) => {
+    assert.strictEqual(address, fixture.expectedAddress);
+  }, (err) => {
+    if (err && err.errno === 'ESERVFAIL') {
+      assert.ok(err.message.includes('queryA ESERVFAIL straße.de'));
+    } else {
+      throw err;
+    }
+  }).finally(mustCall());
 
 dns.resolve4(fixture.hostname, mustCall((err, addresses) => {
   if (err && err.errno === 'ESERVFAIL') {