# truck.rb
class Truck

  def initialize(cyliders = 6, litres =  3.2)
    @litres =  litres
    @cyliders = cyliders
    @passengers = []
  end

  def add_passengers(person)
    @passengers << person
    @passengers.flatten!
  end

  alias :add_passenger :add_passengers

  def number_of_passengers
     @passengers.length
  end

  def has_big_engine?
    @litres > 3.1
  end

  def has_v6_engine?
    @cyliders == 6
  end
end 

#################################################
# truck_spec.rb

require File.join(File.dirname(__FILE__),'truck')

describe Truck do

  # Need to return object
  # Should be uses the object_id
  subject do
    foo = Truck.new()
    foo.add_passengers(['James','Kelly','Vic','Foo'])
    foo
  end 


  it "should have four passengers" do
    pending("Working on better test")
    @foo.passenger_number.should == 4
  end

  it "should have four passengers" do
     should have(4).number_of_passengers 
  end

  
  
  it "should have v6 engine" do
    should have_v6_engine
  end

  it "should have a big engine" do 
    should have_big_engine
  end
end