How do you set up Rack::URLMap to work with RSpec in Sinatra?

Question

I'm relatively new to Sinatra, and I want to figure out a way to integrate RSpec with my Sinatra setup.

config.ru

require 'sinatra'
require 'mongoid'
require 'uri'
require './lib/twilio_wrapper'

Mongoid.load!("./config/mongoid.yml")

Dir["./controllers/*.rb"].each { |file| require file }

run Rack::URLMap.new(
  '/' => HomeController.new,
  '/users' => UsersController.new(TwilioWrapper.new)
)

With this setup, I can modularize my controllers and create single instances of helper classes (such as TwilioWrapper). However, if I want to set up RSpec, I need to point it to my application's class. However, in the situation above, because I'm using Rack::URLMap, I don't have a specific application class to point RSpec to.

How can I keep my code modular in the fashion outlined above while including RSpec for tests?

score 3 · Accepted Answer · edited May 23 '17 at 10:33

Rack does not care about controllers, it cares about apps. So HomeController and UsersController are 2 Sinatra applications "racked up" in Rack. These are not controllers, they are separate Rack apps. I do not think you want 2 applications but rather to put these 2 controllers in 2 files so you can spec them out separately and keep the code readable.

The naming convention for Sinatra is to name it something like MyApp to reflect this. Sinatra is a flat framework, but you can name your "controller" files what you want.

So in folder routes you can have 'users.rb' and 'home.rb' but both files have at the top

MyApp < Sinatra::Application

Then you can test using Rack::Test with Rspec.

If you do indeed want to test 2 apps and want the prefix using Rack::Test w Rspec you simply need to define app in your spec_helper or spec file as:

 def app
  run Rack::URLMap.new(
   '/' => HomeController.new,
   '/users' => UsersController.new(TwilioWrapper.new)
  )
 end

All Rack::Test does is rackup your Sinatra app into a test container.

Also please see Phrogz's excellent answer on how to lay out a Sinatra application

Great explanation. I think what I really needed in the end was the link to an example Sinatra app. I'm going to do a little bit of refactoring, and I should be good to go. — Michael D., Feb 08 '13 at 14:56

How do you set up Rack::URLMap to work with RSpec in Sinatra?

1 Answers1