Añadiendo pruebas

.c9/metadata/tab3

@@ -1 +1 @@
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+{"filter":false,"title":"bash - \"alu01005368742-pract8_lpp-1124680\"","tooltip":"bash - \"alu01005368742-pract8_lpp-1124680\"","undoManager":{"mark":0,"position":-1,"stack":[]},"terminal":{"id":"alu01005368742@pract8_lpp_209","cwd":"","width":1006,"height":204,"scrollTop":297},"timestamp":1417098973239,"hash":"da39a3ee5e6b4b0d3255bfef95601890afd80709"}

.c9/metadata/workspace/lib/Examenes.rb

@@ -1 +1 @@
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.c9/metadata/workspace/spec/spec_naranjero.rb

@@ -0,0 +1 @@
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lib/Examenes.rb

@@ -11,5 +11,6 @@
 require "Examenes/interfaz.rb"
 require "Examenes/examen.rb"
 require 'Examenes/quiz.rb'
+require 'Examenes/naranjero.rb'
 module Examenes
 end

lib/Examenes/naranjero.rb

@@ -1,4 +1,5 @@
 class Arbol
+    require 'thread'
     attr_reader :edad, :altura, :contador
 
     def initialize()
@@ -50,4 +51,7 @@ def uno_mas
 		end
 	end
 
+end
+
+if __FILE__ == $0 then 
 end

spec/spec_naranjero.rb

@@ -0,0 +1,32 @@
+require 'indice'
+require 'spec_helper'
+
+
+describe Naranjero do
+    before :each do
+        @naranjero = Naranjero.new(0,0)
+        @t1 = Thread.new do
+            20.times do
+                @naranjero.uno_mas
+            end
+        end
+        @t2 = Thread.new do
+            20.times do
+                @naranjero.recolectar_una
+            end
+        end
+    end
+
+    describe "Aumentar_edad" do
+        it "edad" do
+            @naranjero.uno_mas
+            expect(@naranjero.edad).to eq(1)     
+        end
+        it "vivo?" do
+            @t1.join
+            sleep 0.1
+            expect(@naranjero.vivo).to eq(false)
+        end
+    end
+
+end