gistfile1.rb

require "rubygems"

class Object
  def returning(receiver)
    yield receiver
    receiver
  end
end

module AnotherModule
  def say_hello(obj)
    puts "Hello from AnotherModule #{obj}"
  end
end 
 
class UserFlowsTest# < ActionController::IntegrationTest
  def test_user_flow_from_signup_thru_first_trade
    new_session do |parent|
      hello_from_another_module parent
    end
  end
  
  def new_session
    returning self do |sess|
      sess.extend(TestingDSL)
      yield sess if block_given?
    end
  end
  
  private
  module TestingDSL
    include AnotherModule
    extend AnotherModule
    def hello_from_another_module(obj)
      say_hello obj
    end
  end
end

t = UserFlowsTest.new
t.new_session
t.test_user_flow_from_signup_thru_first_trade # => "Hello from AnotherModule #<UserFlowsTest:0x314304>"