class Hanoi
  class Board
    def initialize(num_disks)
    end

    def towers
      [1, 2, 3]
    end
  end
end

class Hanoi
  class Board
    def initialize(num_disks)
    end

    def towers
      [1, 2, 3]
    end
  end

  class Tower
  end
end

Test update now fails correctly
Test update now fails correctly
