hash to array with order

hash_to_array_with_order.rb

  class HashToArrayWithOrder
    class MaxDepth < Exception ; end
    
    def self.new(data,max_level = 5)
      raise MaxDepth if max_level==0
      if data.is_a? Hash
        data = data.sort{|a,b| a.class == b.class ? a.to_s <=> b.to_s : a.class.to_s <=> b.class.to_s}
      end
      return data unless data.is_a? Array
      data.map {|array_element| new(array_element,max_level -1)  }
    end

  end

hash_to_array_with_order_spec.rb

describe HashToArrayWithOrder do
  
  it "should get the same hash regarding the order of the keys for a hash" do
    hash1 = {:a => {:small => 'asdf', :big => '100x300'}, :min => 3}
    hash2 = {:min => 3, :a => {:big => '100x300', :small => 'asdf'}}
    HashToArrayWithOrder.new(hash1).to_s == HashToArrayWithOrder.new(hash2).to_s
  end
  
  it "should raise an error if it reach max_level depth" do
    hash = {:a => {:small => 'asdf', :big => '100x300'}, :min => 3}
    
    lambda{ HashToArrayWithOrder.new(hash, 0) }.should raise_error(HashToArrayWithOrder::MaxDepth)
  end
end