Happy Numbers

class Fixnum
    def happy?
        n = self
        [1, 7].include? Enumerator.new {|y|
            loop {
                y << (n = n.to_s.chars.map {|x| x.to_i ** 2}.reduce(:+))
            }
        }.lazy.select{|y| y < 10}.take(1).first
    end
end


raise "Errado" unless [1, 10, 100, 130, 97, 7, 1112].collect(&:happy?).all?
raise "Errado" unless ![2, 3, 4, 5, 6, 8, 8].collect(&:happy?).any?