snippet.rb

class User < ActiveRecord::Base
  def score=(value)
    super(value * 1_000_000)   # pinball scores do it, why not Users?
  end
end

describe User do
  describe "creating a new user" do
    it "should multiply the score by some ridiculous amount" do
      user = User.new(:score => 5)
      user.score.should == 5_000_000
    end
  end

  describe "updating an old user" do
    it "should multiply the score by some ridiculous amount" do
      user = User.create!
      user.update_attributes(:score => 3)
      user.score.should == 3_000_000
    end
  end
end