From 35e6fc9b302c19db556b490d163c4f0dd28e418d Mon Sep 17 00:00:00 2001
From: Anderson Paiva <anderson.ultimato@hotmail.com>
Date: Thu, 23 Feb 2023 17:55:50 -0300
Subject: [PATCH] test: improve test coverage of lib/dns

---
 test/parallel/test-dns.js | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/test/parallel/test-dns.js b/test/parallel/test-dns.js
index b324723ce9a8f4..e1daa9021f9e46 100644
--- a/test/parallel/test-dns.js
+++ b/test/parallel/test-dns.js
@@ -239,6 +239,15 @@ assert.throws(() => dns.lookup('nodejs.org', 4), {
   name: 'TypeError'
 });
 
+assert.throws(() => dns.lookup('', {
+  family: 'nodejs.org',
+  hints: dns.ADDRCONFIG | dns.V4MAPPED | dns.ALL,
+}), {
+  code: 'ERR_INVALID_ARG_TYPE',
+  name: 'TypeError',
+  message: 'The "callback" argument must be of type function. Received undefined'
+});
+
 dns.lookup('', { family: 4, hints: 0 }, common.mustCall());
 
 dns.lookup('', {
@@ -264,6 +273,16 @@ dns.lookup('', {
   hints: dns.ADDRCONFIG | dns.V4MAPPED | dns.ALL
 }, common.mustCall());
 
+dns.lookup('', {
+  hints: dns.ADDRCONFIG | dns.V4MAPPED | dns.ALL,
+  family: 'IPv4'
+}, common.mustCall());
+
+dns.lookup('', {
+  hints: dns.ADDRCONFIG | dns.V4MAPPED | dns.ALL,
+  family: 'IPv6'
+}, common.mustCall());
+
 (async function() {
   await dnsPromises.lookup('', { family: 4, hints: 0 });
   await dnsPromises.lookup('', { family: 6, hints: dns.ADDRCONFIG });