gistfile1.rbx

require 'rubygems'
require 'spec'

class Team
  
  def initialize(game)
    @game = game
  end
  
  def do_substitution
    @game.num_subs -= 1
  end
end

class Game
  attr_accessor :num_subs
  
  def initialize
    @num_subs = 0
  end
end

describe Team do
  
  describe "integrated with a real Game instance" do

    before(:each) do
      @game = Game.new
      @team = Team.new(@game)
    end
  
    describe "when a substitution is performed" do
    
      it "should decrement the num_subs on the game" do
        # @game.should_receive(:num_subs)
        @team.do_substitution
        @game.num_subs.should == -1
      end
    
    end

  end
  
  describe "using a mock Game" do

    before(:each) do
      @game = mock(Game)
      @team = Team.new(@game)
    end
  
    describe "when a substitution is performed" do
    
      it "should decrement the num_subs on the game" do
        @game.stub!(:num_subs).and_return(5)
        @game.should_receive("num_subs=").with(4)
        @team.do_substitution
      end
    
    end

  end
  
  
end