From 549a6c2116d6c201f8ef91d808ab9cad5e77804b Mon Sep 17 00:00:00 2001
From: Manuel Araoz <manuelaraoz@gmail.com>
Date: Thu, 5 Feb 2015 11:53:13 -0300
Subject: [PATCH] remove extra Error

---
 lib/message.js  | 12 ++++--------
 test/message.js |  4 ++--
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/lib/message.js b/lib/message.js
index d020181..f9433c6 100644
--- a/lib/message.js
+++ b/lib/message.js
@@ -22,7 +22,7 @@ var Message = function Message(message) {
   if (!(this instanceof Message)) {
     return new Message(message);
   }
-  $.checkArgument(_.isString(message), new TypeError('First argument should be a string'));
+  $.checkArgument(_.isString(message), 'First argument should be a string');
   this.message = message;
 
   return this;
@@ -41,7 +41,7 @@ Message.prototype.magicHash = function magicHash() {
 
 Message.prototype._sign = function _sign(privateKey) {
   $.checkArgument(privateKey instanceof PrivateKey,
-    new TypeError('First argument should be an instance of PrivateKey'));
+    'First argument should be an instance of PrivateKey');
   var hash = this.magicHash();
   var ecdsa = new ECDSA();
   ecdsa.hashbuf = hash;
@@ -64,12 +64,8 @@ Message.prototype.sign = function sign(privateKey) {
 };
 
 Message.prototype._verify = function _verify(publicKey, signature) {
-  if (!(publicKey instanceof PublicKey)) {
-    throw new TypeError('First argument should be an instance of PublicKey');
-  }
-  if (!(signature instanceof Signature)) {
-    throw new TypeError('Second argument should be an instance of Signature');
-  }
+  $.checkArgument(publicKey instanceof PublicKey, 'First argument should be an instance of PublicKey');
+  $.checkArgument(signature instanceof Signature, 'Second argument should be an instance of Signature');
   var hash = this.magicHash();
   var verified = ECDSA.verify(hash, signature, publicKey);
   if (!verified) {
diff --git a/test/message.js b/test/message.js
index 6a2f48c..7a51985 100644
--- a/test/message.js
+++ b/test/message.js
@@ -69,14 +69,14 @@ describe('Message', function() {
     expect(function() {
       var message6 = new Message(text);
       return message6._verify('not a public key', signature);
-    }).to.throw(TypeError);
+    }).to.throw('First argument should be an instance of PublicKey');
   });
 
   it('verify will error with incorrect signature argument', function() {
     expect(function() {
       var message7 = new Message(text);
       return message7._verify(publicKey, 'not a signature');
-    }).to.throw(TypeError);
+    }).to.throw('Second argument should be an instance of Signature');
   });
 
   it('verify will correctly identify a bad signature', function() {