awesome_resources_spec.rb

module AwesomeResource
  def initialize(attributes = {})
    attributes.each do |key,val|
      sym = key.to_sym
      reader = :"#{sym}"
      writer = :"#{sym}="

      unless respond_to?(reader)
        self.class.send(:attr_reader, sym)
      end

      unless respond_to?(writer)
        self.class.send(:attr_writer, sym)
      end

      send(writer, val)
    end
  end
end

describe AwesomeResource do
  it "creates readers and writers for any attributes passed in during initialization" do
    article_class = Class.new do
      include AwesomeResource
    end

    article = article_class.new("title" => "Fun")
    article.title.should == "Fun"

    article.title = 'Fun Times!'
    article.title.should == 'Fun Times!'

    expect { article.unknown_attribute }.to raise_exception
  end
end

This is a bit shorter: https://gist.github.com/DNNX/5643769 .

I removed unnecessary conversion of strings to symbols and vice versa.