Simple inline Ruby tests

math.rb

# Just run this file with ruby to run tests:  `ruby math.rb`

require 'minitest/autorun'

class Math
  def self.add(a, b)
    a + b
  end
end

class MathTest < Minitest::Test
  def test_add
    result = Math.add(1,2)
    assert_equal result, 3
  end
end