sample_app.rb

# sample/sample_app.rb
require 'sinatra'
require 'pry'


# We us "classic" mode where you don't actually see the class
# inheriting from Sinatra::Base and you don't start the app with
# rackup. This makes the object structure less obvious but lets
# Sinatra do more of the behind-the-scenes

get '/' do
  # "Hello, World!"
end

post '/' do
  # "Caught a post" 
end

sample_test.rb

# sample/test/sample_test.rb

require './sample_test_helper.rb'

class MyTest < MiniTest::Unit::TestCase

  include Rack::Test::Methods

  def app
    Sinatra::Application
  end

  def test_hello_world
    get '/'
    assert last_response.ok?
    assert_equal "Hello, World!", last_response.body
  end

  def test_post
    post '/'
    assert last_response.ok?
    assert_equal "Caught a post", last_response.body
  end
end

sample_test_helper.rb

# sample/test/sample_test_helper.rb

ENV['RACK_ENV'] = 'test'
require 'minitest/autorun'
require 'rack/test'

require '../sample_app.rb'