titleizable.rb

module Concerns::Titleizable
  extend ActiveSupport::Concern
  
  included do
    before_validation :to_titlecase
    before_validation :to_downcase
    
    class << self
      attr_accessor :to_titleize
      attr_accessor :to_be_downcased
    end
  end
 
  
  module ClassMethods
    def titleize(*to_titleize)
      self.to_titleize = to_titleize
    end

    def downcase(*to_downcase)
      self.to_be_downcased = to_downcase
    end
  end

  def to_titlecase
    to_titleize = self.class.to_titleize
    to_titleize.each do | word |
      if self.send(word)
        titleized = self.send(word).mb_chars.titlecase.strip.normalize
        self.send("#{word}=", titleized)
      end
    end
  end

  def to_downcase
    to_down = self.class.to_be_downcased
    to_down.each do | word |
      if self.send(word)
        downcased = self.send(word).mb_chars.downcase.strip.normalize
        self.send("#{word}=", downcased)
      end
    end
  end
end

require 'spec_helper'

class FakeModel   
  def self.before_validation(to_titlecase)
  end

  include Concerns::Titleizable
  titleize :name
  downcase :title
  attr_accessor :name, :title
  
  def initialize(name, title)
    @name = name
    @title = title
  end
  
  def save
    to_titlecase
    to_downcase
  end
end

describe Concerns::Titleizable do 
  let(:model) { FakeModel.new("mussum ipsum cacilds, vidis litro abertis." , "Me Faiz Elementum Girarzis" ) }
  subject { model }
  
  describe '#save' do
    before { model.save }

    its(:name) { should eq("Mussum Ipsum Cacilds, Vidis Litro Abertis.")}
    its(:title) { should eq("me faiz elementum girarzis")}
  end
end