From 69c1ff9615c4f5f0e638053367311e3d81dba2e4 Mon Sep 17 00:00:00 2001
From: toboid <toboid@users.noreply.github.com>
Date: Mon, 6 Feb 2017 21:08:34 +0000
Subject: [PATCH 1/2] test: verify error message from buffer.includes

---
 test/parallel/test-buffer-includes.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/test/parallel/test-buffer-includes.js b/test/parallel/test-buffer-includes.js
index 9b0aef0ad7652d..17d2626e84cca3 100644
--- a/test/parallel/test-buffer-includes.js
+++ b/test/parallel/test-buffer-includes.js
@@ -275,15 +275,17 @@ for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
   }
 }
 
+const expectedError =
+  /^TypeError: "val" argument must be string, number, Buffer or Uint8Array$/;
 assert.throws(function() {
   b.includes(function() { });
-});
+}, expectedError);
 assert.throws(function() {
   b.includes({});
-});
+}, expectedError);
 assert.throws(function() {
   b.includes([]);
-});
+}, expectedError);
 
 // test truncation of Number arguments to uint8
 {

From 83c8f293d570a0dbb356ccb8bd2d0de954e6b667 Mon Sep 17 00:00:00 2001
From: toboid <toboid@users.noreply.github.com>
Date: Tue, 7 Feb 2017 21:10:51 +0000
Subject: [PATCH 2/2] test: use arrow funcs verifying buffer.includes

---
 test/parallel/test-buffer-includes.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/test/parallel/test-buffer-includes.js b/test/parallel/test-buffer-includes.js
index 17d2626e84cca3..ddd7bf36a40597 100644
--- a/test/parallel/test-buffer-includes.js
+++ b/test/parallel/test-buffer-includes.js
@@ -277,13 +277,13 @@ for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
 
 const expectedError =
   /^TypeError: "val" argument must be string, number, Buffer or Uint8Array$/;
-assert.throws(function() {
-  b.includes(function() { });
+assert.throws(() => {
+  b.includes(() => {});
 }, expectedError);
-assert.throws(function() {
+assert.throws(() => {
   b.includes({});
 }, expectedError);
-assert.throws(function() {
+assert.throws(() => {
   b.includes([]);
 }, expectedError);