From a4d9f10b6bf1cd468d1a5b9a283cdf437f8bb7b3 Mon Sep 17 00:00:00 2001
From: Jakob Krigovsky <jakob@krigovsky.com>
Date: Sun, 22 Jul 2018 16:46:20 +0200
Subject: [PATCH] Throw TypeError if argument is not a buffer

---
 index.js | 4 ++++
 test.js  | 6 ++++++
 2 files changed, 10 insertions(+)

diff --git a/index.js b/index.js
index b5507ce..d1e177b 100644
--- a/index.js
+++ b/index.js
@@ -3,5 +3,9 @@
 const bindings = require('bindings')('ced.node')
 
 module.exports = buf => {
+  if (!Buffer.isBuffer(buf)) {
+    throw new TypeError('Expected a buffer')
+  }
+
   return bindings.detectEncoding(buf)
 }
diff --git a/test.js b/test.js
index e0b0c4b..b84ae19 100644
--- a/test.js
+++ b/test.js
@@ -10,3 +10,9 @@ test('detects ASCII', t => {
   const buf = Buffer.from('tést', 'ascii')
   t.is(ced(buf), 'ASCII')
 })
+
+test('throws a TypeError if the argument is not a buffer', t => {
+  t.throws(() => {
+    ced('tést')
+  }, TypeError)
+})