methods for validated attributes for write cache and before type cast

cache raw value in @attributes_cache which is AR convention but should
work fine with non-AR ORM
before type cast method for reading back cached raw value

spec/spec_helper.rb

@@ -25,12 +25,15 @@ LOCALE_PATH = File.expand_path(File.dirname(__FILE__) + '/../lib/validates_timel
 I18n.load_path.unshift(LOCALE_PATH)
 
 class Person
+  include ActiveModel::AttributeMethods
   include ActiveModel::Validations
   extend  ActiveModel::Translation
 
   attr_accessor :birth_date, :birth_time, :birth_datetime
+  attr_accessor :attributes
 
   def initialize(attributes = {})
+    @attributes = {}
     attributes.each do |key, value|
       send "#{key}=", value
     end

spec/validates_timeliness/attribute_methods_spec.rb

@@ -0,0 +1,22 @@
+require 'spec_helper'
+
+describe ValidatesTimeliness::AttributeMethods do
+  before do
+    Employee.validates_datetime :birth_datetime
+    Employee.define_attribute_methods
+  end
+
+  it 'should define attribute write method for validated attributes' do
+    Employee.instance_methods(false).should include("birth_datetime=")
+  end
+
+  it 'should define attribute before_type_cast method for validated attributes' do
+    Employee.instance_methods(false).should include("birth_datetime_before_type_cast")
+  end
+
+  it 'should store original raw value on attribute write' do
+    r = Employee.new
+    r.birth_datetime = '2010-01-01'
+    r.birth_datetime_before_type_cast.should == '2010-01-01'
+  end
+end

spec/validates_timeliness/helper_methods_spec.rb

@@ -12,4 +12,11 @@ describe ValidatesTimeliness::HelperMethods do
     ActiveRecord::Base.instance_methods.should include('validates_time')
     ActiveRecord::Base.instance_methods.should include('validates_datetime')
   end
+
+  describe ".timeliness_validated_attributes" do
+    it 'should return attributes validated with plugin validator' do
+      Person.validates_date :birth_date
+      Person.timeliness_validated_attributes.should == ["birth_date"]
+    end
+  end
 end