0
@@ -129,6 +129,28 @@ module ThoughtBot # :nodoc:
0
         end
0
       end
0
   
0
+      # Ensures that the attribute cannot be changed once the record has been created.
0
+      # Requires an existing record.
0
+      #
0
+      #   should_have_readonly_attributes :password, :admin_flag
0
+      #
0
+      def should_have_readonly_attributes(*attributes)
0
+        get_options!(attributes)
0
+        klass = model_class
0
+
0
+        attributes.each do |attribute|
0
+          attribute = attribute.to_sym
0
+          should "make #{attribute} read-only" do
0
+            readonly = klass.readonly_attributes || []
0
+
0
+            assert readonly.include?(attribute.to_s),
0
+                   (readonly.empty? ?
0
+                     "#{klass} attribute #{attribute} is not read-only" :
0
+                     "#{klass} is making #{readonly.to_a.to_sentence} read-only, but not #{attribute}.")
0
+          end
0
+        end
0
+      end
0
+
0
       # Ensures that the attribute cannot be set to the given values
0
       # Requires an existing record
0
       #

0
@@ -5,6 +5,7 @@ class User < ActiveRecord::Base
0
   has_one :address, :as => :addressable
0
   
0
   attr_protected :password
0
+  attr_readonly :name
0
 
0
   validates_format_of :email, :with => /\w*@\w*.com/
0
   validates_length_of :email, :in => 1..100

0
@@ -24,4 +24,5 @@ class UserTest < Test::Unit::TestCase
0
                                 :null => true,     :primary => false, :scale     => nil, :sql_type => 'varchar(255)'
0
   should_require_acceptance_of :eula
0
   should_require_unique_attributes :email, :scoped_to => :name
0
+  should_have_readonly_attributes :name
0
 end