def <=> other
    self.id <=> other.id
  end


## This is the warning I get
  context "House comparison" do
    setup do
      @house1 = House.new
      @house2 = House.new
    end

    should "be identical if they have identical ids" do
      @house1.id = 1
      @house2.id = 1
      assert @house1 == @house2
    end

    should "be less than another house with a lower house id" do
      @house1.id = 1
      @house2.id = 2
      assert @house1 < @house2
    end

    should "be greater than another house with a lower house id" do
      @house1.id = 2
      @house2.id = 1
      assert @house1 > @house2
    end
  end

## The warning I get
warning: Object#id will be deprecated; use Object#object_id