gistfile1.rb

require "rubygems"
require "rspec"

class MyExample
  def method
    [1,2,3]
  end
  
  def method_missing(method, *args, &block)
    send(:method)
  end
end

describe "an error" do
  it "should have 3 cars" do
    # Fails with error
    # expected cars to be a collection but it does not respond to #length or #size
    MyExample.new.should have(3).cars
  end
  
  it "should also have 3 cars" do
    # Passes
    MyExample.new.cars.count.should eq(3)
  end
end