MessageBoard for train

train.rb

@@ -12,4 +12,18 @@ def see_danger_coming!
 end
 
 class Engineer
+
+	attr_reader :conductor
+
+	def initialize(conductor)
+		@conductor = conductor
+	end
+
+	def slow_down!
+		conductor.confirm_slow_down
+	end
+end
+
+class MessageBoard
+
 end

train_spec.rb

@@ -1,13 +1,20 @@
 require 'rspec'
 require './train'
-describe Conductor do
 
-	let(:engineer) { Engineer.new }
-	let(:conductor) { Conductor.new(engineer)}
+describe MessageBoard do
 
-	it "should tell the engineer to slow down" do
-		engineer.should_receive(:slow_down!)
+	let(:message_board) { MessageBoard.new }
+	let(:conductor) { Conductor.new(message_board) }
+	let(:engineer) { Engineer.new(message_board) }
+
+	it "receives a message from the conductor" do
+		message_board.should_receive(:slow_down!)
 		conductor.see_danger_coming!
 	end
-
+
+	it "receives a confirmation from the engineer" do
+		message_board.should_receive(:confirm_slow_down)
+		engineer.slow_down!
+	end
+
 end