Do not call toString on buffers

lib/change.js

@@ -54,6 +54,7 @@ Object.defineProperties(Change.prototype, {
       return this._modification;
     },
     set: function setModification(val) {
+      var currVal;
       if (Attribute.isAttribute(val)) {
         this._modification = val;
         return;
@@ -79,12 +80,15 @@ Object.defineProperties(Change.prototype, {
       var k = keys[0];
       console.log(keys);
       var _attr = new Attribute({type: k});
-      if (Array.isArray(val[k])) {
+      
+      currVal = val[k];
+      if (Array.isArray(currVal)) {
         val[k].forEach(function (v) {
           _attr.addValue(v.toString());
         });
       } else {
-        _attr.addValue(val[k].toString());
+        var attrVal = Buffer.isBuffer(currVal) ? currVal : currVal.toString();
+        _attr.addValue(attrVal);
       }
       this._modification = _attr;
     },

test/change.test.js

@@ -1,7 +1,7 @@
 // Copyright 2011 Mark Cavage, Inc.  All rights reserved.
 
 var test = require('tape').test;
-
+var fs = require('fs');
 var asn1 = require('asn1');
 
 
@@ -49,6 +49,27 @@ test('new with args', function (t) {
   t.end();
 });
 
+test('new with args and buffer', function (t) {
+  
+
+  var img = fs.readFileSync(__dirname + '/imgs/test.jpg');
+  
+  var change = new Change({
+    operation: 'add',
+    modification: {
+      thumbnailPhoto: img
+    }
+  });
+
+  t.ok(change);
+
+  t.equal(change.operation, 'add');
+  t.equal(change.modification.type, 'thumbnailPhoto');
+  t.equal(change.modification.vals.length, 1);
+  t.equal(change.modification.buffers[0].compare(img), 0);
+
+  t.end();
+});
 
 test('validate fields', function (t) {
   var c = new Change();