test: increase coverage in lib/internal/dns/promises.js

Add a test for the only uncovered code in lib/internal/dns/promises.js. PR-URL: #27330 Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
nodejs · Apr 27, 2019 · 8486917 · 8486917
1 parent 8ca110c
commit 8486917
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/test/parallel/test-dns-lookupService.js b/test/parallel/test-dns-lookupService.js
@@ -18,3 +18,12 @@ assert.throws(
     syscall: 'getnameinfo'
   }
 );
+
+assert.rejects(
+  dns.promises.lookupService('127.0.0.1', 80),
+  {
+    code: 'ENOENT',
+    message: 'getnameinfo ENOENT 127.0.0.1',
+    syscall: 'getnameinfo'
+  }
+);