Switch cloneable specs to objects and nullify all instance vars on cl…

…one.

lib/toy/cloneable.rb

@@ -3,13 +3,13 @@ module Cloneable
     extend ActiveSupport::Concern
 
     def initialize_copy(other)
+      instance_variables.each do |name|
+        instance_variable_set(name, nil)
+      end
+
       @_new_record = true
       @_destroyed  = false
-      @attributes = {}
-
-      self.class.lists.each do |name, list|
-        instance_variable_set(list.instance_variable, nil)
-      end
+      @attributes  = {}
 
       other.attributes.except('id').each do |key, value|
         value = value.duplicable? ? value.clone : value

spec/toy/cloneable_spec.rb

@@ -1,21 +1,17 @@
 require 'helper'
 
 describe Toy::Cloneable do
-  uses_constants('User', 'Game')
+  uses_constants('User')
 
   before do
     User.attribute(:name, String)
     User.attribute(:skills, Array)
-    User.list(:games)
 
-    @game = Game.create
     @user = User.create({
       :name   => 'John',
       :skills => ['looking awesome', 'growing beards'],
-      :games  => [@game],
     })
   end
-  let(:game)  { @game }
   let(:user)  { @user }
 
   describe "#clone" do
@@ -53,5 +49,12 @@
         clone.id.should_not == user.id
       end
     end
+
+    it "nullifies defined instance variables" do
+      user.instance_variable_set("@foo", true)
+      user.clone.tap do |clone|
+        clone.instance_variable_get("@foo").should be_nil
+      end
+    end
   end
 end