anaphora.feature

Feature: Anaphora
  
  Scenario: Dog barks at cat
    Given there is a dog
    And there is a cat
    When the dog barks at the cat
    Then the cat should run away

steps.rb

class Dog
  def barks_at(subject)
    subject.run_away!
  end
end

class Cat
  def run_away!
    @ran_away = true
  end
  
  def has_run_away?
    @ran_away || false
  end
end

module DogWorld
  def the_dog
    @dog ||= Dog.new
  end
end

module CatWorld
  def the_cat
    @cat ||= Cat.new
  end
end

Given /^there is a dog$/ do
  extend DogWorld
end

Given /^there is a cat$/ do
  extend CatWorld
end

When /^the dog barks at the cat$/ do
  the_dog.barks_at(the_cat)
end

Then /^the cat should run away$/ do
  the_cat.should have_run_away
end