Silence Ruby warnings about uninitialized instance variable.

actionpack/test/lib/controller/fake_models.rb

@@ -48,26 +48,19 @@ module Quiz
   end
 end
 
-class Post < Struct.new(:title, :author_name, :body, :secret, :written_on, :cost)
+class Post < Struct.new(:title, :author_name, :body, :secret, :persisted, :written_on, :cost)
   extend ActiveModel::Naming
   include ActiveModel::Conversion
   extend ActiveModel::Translation
 
   alias_method :secret?, :secret
+  alias_method :persisted?, :persisted
 
   def initialize(*args)
     super
     @persisted = false
   end
 
-  def persisted=(boolean)
-    @persisted = boolean
-  end
-
-  def persisted?
-    @persisted
-  end
-
   attr_accessor :author
   def author_attributes=(attributes); end