A simple test setup for Ruby.

• lib is where your code goes
• test is where your tests go
• test\test_helper is the file you require in all of your tests.
• Rakefile contains the test task

Add a test to test called my_object_test.rb like this:

require `test_helper`
class MyObjectTest < Minitest::Test
  def test_math_works
    assert_equal 5, MyObject.doesMath(2,3)
  end
end

Then add lib/my_object.rb with this:

class MyObject
  def does_math(first, second)
    first + second
  end
end

Then add this object to test/test_helper.rb

require `my_object`

Then run

$ rake test

to see if it passes.