lortest.rb

class TriangleError < Exception
end
 
class Triangle
  attr_reader :side1, :side2, :side3

  def initialize(side1, side2, side3)
    @side1 = side1
    @side2 = side2
    @side3 = side3
    @@side_arr = [@side1, @side2, @side3].sort
    self.triangle?
  end

  def triangle?
    min, mid, max = @@side_arr
    raise TriangleError if min <= 0
    raise TriangleError if max >= min + mid
  end

  def kind
    tri_check = @@side_arr.uniq
    if tri_check.length == 1
      :equilateral
    elsif tri_check.length == 2
      :isosceles
    else
      :scalene
    end
  end

end