gistfile1.txt

class Fixnum

	def to_roman
		roman_numerals_values = {1000 => 'M',500 => 'D', 100 => 'C', 50 => 'L', 10 => 'X', 5 => 'V', 1 => 'I'}
		string = String.new
		roman_numerals_values.each do |k,v|
			if self - k >= 0
				string << v
			end
			string
		end
	end
end

gistfile2.txt

require 'minitest/autorun'
require_relative 'roman'

class RomanTest < MiniTest::Unit::TestCase

  def test_1
    assert_equal 'I', 1.to_roman
  end

  def test_2
    skip
    assert_equal 'II', 2.to_roman
  end
  
end

gistfile3.txt

Shabans-MacBook-Air-3:~/exercism/ruby/roman-numerals$ ruby roman_numerals_test.rb
MiniTest::Unit::TestCase is now Minitest::Test. From roman_numerals_test.rb:4:in `<main>'
Run options: --seed 28854

# Running:

SSSSSSSSSSSSSSSFSS

Finished in 0.058014s, 310.2699 runs/s, 17.2372 assertions/s.

  1) Failure:
RomanTest#test_1 [roman_numerals_test.rb:7]:
--- expected
+++ actual
@@ -1 +1 @@
-"I"
+{1000=>"M", 500=>"D", 100=>"C", 50=>"L", 10=>"X", 5=>"V", 1=>"I"}


18 runs, 1 assertions, 1 failures, 0 errors, 17 skips

You have skipped tests. Run with --verbose for details.