From cbec2843361f86e43d8dc780982b0098526d4d9a Mon Sep 17 00:00:00 2001
From: Masashi Hirano <cherrydog07@gmail.com>
Date: Fri, 27 Jul 2018 08:11:04 +0900
Subject: [PATCH] test: check arg type for dnsPromises.resolve to increase
 coverage.

---
 test/parallel/test-dns.js | 33 +++++++++++++++++++++++++--------
 1 file changed, 25 insertions(+), 8 deletions(-)

diff --git a/test/parallel/test-dns.js b/test/parallel/test-dns.js
index 3a44be92804746..dcef59e43f90a1 100644
--- a/test/parallel/test-dns.js
+++ b/test/parallel/test-dns.js
@@ -135,14 +135,31 @@ assert.deepStrictEqual(dns.getServers(), portsExpected);
 dns.setServers([]);
 assert.deepStrictEqual(dns.getServers(), []);
 
-common.expectsError(() => {
-  dns.resolve('example.com', [], common.mustNotCall());
-}, {
-  code: 'ERR_INVALID_ARG_TYPE',
-  type: TypeError,
-  message: 'The "rrtype" argument must be of type string. ' +
-           'Received type object'
-});
+{
+  const errObj = {
+    code: 'ERR_INVALID_ARG_TYPE',
+    type: TypeError,
+    message: 'The "rrtype" argument must be of type string. ' +
+             'Received type object'
+  };
+  common.expectsError(() => {
+    dns.resolve('example.com', [], common.mustNotCall());
+  }, errObj);
+  common.expectsError(() => {
+    dnsPromises.resolve('example.com', []);
+  }, errObj);
+}
+{
+  const errObj = {
+    code: 'ERR_INVALID_ARG_TYPE',
+    type: TypeError,
+    message: 'The "name" argument must be of type string. ' +
+             'Received type undefined'
+  };
+  common.expectsError(() => {
+    dnsPromises.resolve();
+  }, errObj);
+}
 
 // dns.lookup should accept only falsey and string values
 {