This should return any random number or letter passed into the array. It does from what I can tell but it doesn't pass the specs.

Die class2

class Die
  def initialize(labels)
    if labels.empty?
    raise ArgumentError
    end
    @labels = labels
  end

  def sides
  	 @labels.length
  end

  def roll
  	random = @labels.shuffle
  	random[1]
  end
end

#test------------------------------------------------------

it 'returns a single letter if one label is passed in' do
      random_letter = ('A'..'Z').to_a[rand(26)]
      die = Die.new([random_letter])
      
#end test--------------------------------------------------