From 7282a6b81cd631ac49656c175c7b515b27355e38 Mon Sep 17 00:00:00 2001
From: Adrian Estrada <edsadr@gmail.com>
Date: Wed, 11 Jan 2017 22:14:36 -0500
Subject: [PATCH] test: validate errors in test-buffer-indexof

* validate errors in assert.throws
* use arrow functions
---
 test/parallel/test-buffer-indexof.js | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/test/parallel/test-buffer-indexof.js b/test/parallel/test-buffer-indexof.js
index ebb8c1fe586842..208fed08cdf45c 100644
--- a/test/parallel/test-buffer-indexof.js
+++ b/test/parallel/test-buffer-indexof.js
@@ -344,15 +344,20 @@ assert.strictEqual(Buffer.from('aaaaa').indexOf('b', 'ucs2'), -1);
   }
 }
 
-assert.throws(function() {
-  b.indexOf(function() { });
-});
-assert.throws(function() {
+const argumentExpected =
+    /^TypeError: "val" argument must be string, number, Buffer or Uint8Array$/;
+
+assert.throws(() => {
+  b.indexOf(() => { });
+}, argumentExpected);
+
+assert.throws(() => {
   b.indexOf({});
-});
-assert.throws(function() {
+}, argumentExpected);
+
+assert.throws(() => {
   b.indexOf([]);
-});
+}, argumentExpected);
 
 // All code for handling encodings is shared between Buffer.indexOf and
 // Buffer.lastIndexOf, so only testing the separate lastIndexOf semantics.