1 files changed, 33 insertions, 0 deletions
diff --git a/test/internet/test-dns-idna2008.js b/test/internet/test-dns-idna2008.js
new file mode 100644
index 0000000000..ebabe322f0
--- /dev/null
+++ b/test/internet/test-dns-idna2008.js
@@ -0,0 +1,33 @@
+'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 [host, expectedAddress] = ['straße.de', '81.169.145.78'];
+
+dns.lookup(host, mustCall((err, address) => {
+  assert.ifError(err);
+  assert.strictEqual(address, expectedAddress);
+}));
+
+dns.promises.lookup(host).then(mustCall(({ address }) => {
+  assert.strictEqual(address, expectedAddress);
+}));
+
+dns.resolve4(host, mustCall((err, addresses) => {
+  assert.ifError(err);
+  assert.deepStrictEqual(addresses, [expectedAddress]);
+}));
+
+new dns.promises.Resolver().resolve4(host).then(mustCall((addresses) => {
+  assert.deepStrictEqual(addresses, [expectedAddress]);
+}));