dns: expose getDefaultResultOrder

PR-URL: https://github.com/nodejs/node/pull/46973
Fixes: https://github.com/nodejs/node/issues/46919
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Paolo Insogna <paolo@cowtech.it>

1 files changed, 24 insertions, 0 deletions

diff --git a/test/internet/test-dns-getDefaultResultOrder.js b/test/internet/test-dns-getDefaultResultOrder.js
new file mode 100644
index 0000000000..ae176f1264
--- /dev/null
+++ b/test/internet/test-dns-getDefaultResultOrder.js
@@ -0,0 +1,24 @@
+'use strict';
+
+const common = require('../common');
+
+const assert = require('assert');
+const dns = require('dns');
+
+dns.setDefaultResultOrder('ipv4first');
+let dnsOrder = dns.getDefaultResultOrder();
+assert.ok(dnsOrder === 'ipv4first');
+dns.setDefaultResultOrder('verbatim');
+dnsOrder = dns.getDefaultResultOrder();
+assert.ok(dnsOrder === 'verbatim');
+
+{
+  (async function() {
+    const result = await dns.promises.lookup('localhost');
+    const result1 = await dns.promises.lookup('localhost', { verbatim: true });
+    assert.ok(result !== undefined);
+    assert.ok(result1 !== undefined);
+    assert.ok(result.address === result1.address);
+    assert.ok(result.family === result1.family);
+  })().then(common.mustCall());
+}