Editing an object after it has been used as the starting attributes o…

…f a model shouldn't affect the model's attributes.

src/model.js

@@ -4,7 +4,7 @@ var Model = function(name, class_methods, instance_methods) {
 
   // The model constructor.
   var model = function(attributes) {
-    this.attributes = attributes || {};
+    this.attributes = jQuery.extend({}, attributes)
     this.changes = {};
     this.errors = new Model.Errors(this);
     this.uid = [name, Model.UID.generate()].join("-")

test/tests/model.js

@@ -1,10 +1,20 @@
 module("Model");
 
-test("attr, attributes, changes, reset, save, destroy", function() {
-  var Post = Model("post");
+test("defining attributes when instanciating a model", function() {
+  var Post = Model("post")
+  var post
+
+  post = new Post(undefined)
+  same({}, post.attributes)
 
-  same(new Post().attributes, {});
+  var attributes = { a: "a", b: "b" }
+  post = new Post(attributes)
+  attributes.a = "b"
+  same("a", post.attributes.a)
+})
 
+test("attr, attributes, changes, reset, save, destroy", function() {
+  var Post = Model("post");
   var post = new Post({ title: "Foo", body: "..." });
 
   same(post.attributes, { title: "Foo", body: "..." });