gistfile1.rb

describe Article do
  subject
  def article; Article.new; end

  it "validates presence of :title" do
    article.should validate_presence_of(:title)
  end
end

FWIW, you can already do this:

describe Article do
  let(:article) { Article.new }
  subject { article }
end

This gives you the subject/named-thing duality you're looking for, and requires less "magic" than the above (which would need a method_added hook, right?). And it already works!

See rspec/rspec-core#619