ultra simple ruby Decorator via SimpleDelegator

gistfile1.rb

require 'delegate'

  class Base
     def foo
       "foo"
     end
     def bar
       "bar"
     end
  end
     

  class MyDecorator < SimpleDelegator
      def new_method
        "new_method"
      end
      def foo
         "Overridden #{super}"
      end
  end
  
  class DecoratorTest < Test::Unit::TestCase
    def setup
       @base      = Base.new
       @decorated = MyDecorator.new(@base)
    end
    
    def test_pass_through_methods
      assert_equal "bar", @decorated.bar
    end

    def test_decorator_can_add_method
      assert_equal "new_method", @decorated.new_method
    end

    def test_override_with_super
      assert_equal "Overridden foo", @decorated.foo
    end
  end