ponies.rb

class PonyList
  def initialize(ponies = [])
    @ponies = ponies
  end
  
  def empty?
    @ponies.empty?
  end
  
  def add(pony)
    @ponies << pony
  end
end

if $0 == __FILE__
  require "test/unit"
  require "rubygems"
  require "Shoulda"

  class Test::Unit::TestCase
    def self.should_be_empty
      should "be empty" do
        assert(@list.empty?)
      end
    end
    
    def self.should_not_be_empty
      should "not be empty" do
        assert(!@list.empty?)
      end
    end
  end
  
  class TestPonyLists < Test::Unit::TestCase
    def test_case_name
      assert(true, "Failure message.")
    end
    
    context "new PonyList" do
      setup { @list = PonyList.new }
      should_be_empty
      
      context "with an extra Pony" do
        setup { @list.add "Grey" }
        should_not_be_empty
        
        should "contain names of pony types" do
        end
      end
      
      
    end
    
    context "PonyList with ponies" do
      setup do
        @list = PonyList.new(%w[White Black])
      end
      
      should_not_be_empty
      
      should "be not empty" do
        assert(!@list.empty?)
      end
    end
  end
end