A Queue-like data structure built in ruby

The Queue

class Queue
  attr_reader :store
  def initialize
    @store = []
  end

  def enqueue(x)
    store.push(x)
  end

  def dequeue
    store.shift
  end

  def peek
    store.first
  end
end
queue = Queue.new
p queue.enqueue("this") == ["this"]
p queue.enqueue("that") == ["this","that"]
p queue.peek == "this"
p queue.dequeue == "this"