From ae016c8e6de576c4cc142e76650e9e76b95b4196 Mon Sep 17 00:00:00 2001
From: Masashi Hirano <cherrydog07@gmail.com>
Date: Wed, 27 Jun 2018 18:31:25 +0900
Subject: [PATCH] test: add tests for dnsPromises.lookup

Added tests for dnsPromises.lookup to increase coverage and test
`onlookup()` and `onlookupall()` methods.

PR-URL: https://github.com/nodejs/node/pull/21559
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
---
 test/parallel/test-dns-lookup.js | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/test/parallel/test-dns-lookup.js b/test/parallel/test-dns-lookup.js
index 3413bcffd8abe9..244d2356d9e902 100644
--- a/test/parallel/test-dns-lookup.js
+++ b/test/parallel/test-dns-lookup.js
@@ -1,5 +1,6 @@
 'use strict';
 const common = require('../common');
+const { addresses } = require('../common/internet');
 const assert = require('assert');
 const cares = process.binding('cares_wrap');
 const dns = require('dns');
@@ -92,6 +93,30 @@ common.expectsError(() => {
     all: false
   });
   assert.deepStrictEqual(res, { address: '127.0.0.1', family: 4 });
+
+  assert.rejects(
+    dnsPromises.lookup(addresses.INVALID_HOST, {
+      hints: 0,
+      family: 0,
+      all: false
+    }),
+    {
+      code: 'ENOTFOUND',
+      message: `getaddrinfo ENOTFOUND ${addresses.INVALID_HOST}`
+    }
+  );
+
+  assert.rejects(
+    dnsPromises.lookup(addresses.INVALID_HOST, {
+      hints: 0,
+      family: 0,
+      all: true
+    }),
+    {
+      code: 'ENOTFOUND',
+      message: `getaddrinfo ENOTFOUND ${addresses.INVALID_HOST}`
+    }
+  );
 })();
 
 dns.lookup(false, {