1 files changed, 76 insertions, 0 deletions
diff --git a/tests/node_compat/test/internet/test-dns-idna2008.js b/tests/node_compat/test/internet/test-dns-idna2008.js
new file mode 100644
index 000000000..7308f9deb
--- /dev/null
+++ b/tests/node_compat/test/internet/test-dns-idna2008.js
@@ -0,0 +1,76 @@
+// deno-fmt-ignore-file
+// deno-lint-ignore-file
+
+// Copyright Joyent and Node contributors. All rights reserved. MIT license.
+// Taken from Node 18.12.1
+// This file is automatically generated by `tools/node_compat/setup.ts`. Do not modify this file manually.
+
+'use strict';
+
+// Verify that non-ASCII hostnames are handled correctly as IDNA 2008.
+//
+// * Tests will fail with NXDOMAIN when UTF-8 leaks through to a getaddrinfo()
+//   that doesn't support IDNA at all.
+//
+// * "straße.de" will resolve to the wrong address when the resolver supports
+//   only IDNA 2003 (e.g., glibc until 2.28) because it encodes it wrong.
+
+const { mustCall } = require('../common');
+const assert = require('assert');
+const dns = require('dns');
+const { addresses } = require('../common/internet');
+
+const fixture = {
+  hostname: 'straße.de',
+  expectedAddress: '81.169.145.78',
+  dnsServer: addresses.DNS4_SERVER,
+  family: 4,
+};
+
+// 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,
+  { 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, { 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') {
+    assert.ok(err.message.includes('queryA ESERVFAIL straße.de'));
+    return;
+  }
+  assert.ifError(err);
+  assert.deepStrictEqual(addresses, [fixture.expectedAddress]);
+}));
+
+const p = new dns.promises.Resolver().resolve4(fixture.hostname);
+p.then((addresses) => {
+  assert.deepStrictEqual(addresses, [fixture.expectedAddress]);
+}, (err) => {
+  if (err && err.errno === 'ESERVFAIL') {
+    assert.ok(err.message.includes('queryA ESERVFAIL straße.de'));
+  } else {
+    throw err;
+  }
+}).finally(mustCall());