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I'm going through the ruby koans, I'm on 151 and I just hit a brick wall. Here is the koan: # You need to write the triangle method in the file 'triangle.rb' require 'triangle.rb' class AboutTriangleProject2 < EdgeCase::Koan # The first assignment did not talk about how to handle errors. # Let's handle that part now. def test_illegal_triangles_throw_exceptions assert_raise(TriangleError) do triangle(0, 0, 0) end assert_raise(TriangleError) do triangle(3, 4, -5) end assert_raise(TriangleError) do triangle(1, 1, 3) end assert_raise(TriangleError) do triangle(2, 4, 2) end end end Then in triangle.rb we have: def triangle(a, b, c) # WRITE THIS CODE if a==b && a==c return :equilateral end if (a==b && a!=c) || (a==c && a!=b) || (b==c && b!=a) return :isosceles end if a!=b && a!=c && b!=c return :scalene end if a==0 && b==0 && c==0 raise new.TriangleError end end # Error class used in part 2. No need to change this code. class TriangleError < StandardError end I am beyond confused - any help at all would be much appreciated! EDIT: To complete this koan, I need to put something in the TriangleError class - but I have no idea what UPDATE: Here is what the koan karma thing is saying: <TriangleError> exception expected but none was thrown.

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