Rails%203%20In%20Action

528 CHAPTER 18 Rack-based applications
By making it a class, you’ll be able to mount it in your application using the mount
method in config/routes.rb. By mounting this Sinatra application, it will have access to
all the classes from your Rails application, such as your models, which is precisely what
you’re going to need for this new version of your API. You won’t use this code example
right now; it’s handy to know that you can do this.
To use Sinatra with your application, you’ll need to add it to the Gemfile with this
line:
gem 'sinatra'
Then you’ll need to run bundle install to install it. So let’s go ahead now and start
building this API using Sinatra. 5
18.3.3 The API, by Sinatra
Let’s create a new file to test your experimental new API at spec/api/v3/json/
tickets_spec.rb. In this file you want to set up a project that has at least one ticket, as
well as a user that you can use to make requests to your API. After that, you want to
make a request to /api/v3/json/tickets and check that you get back a proper response
of tickets. With this in mind, let’s write a spec that looks like the code shown in the following
listing.
Listing 18.7 spec/api/v3/json/tickets_spec.rb
require 'spec_helper'
describe Api::V3::JSON::Tickets, :type => :api do
let(:project) { Factory(:project) }
let(:user) { Factory(:user) }
let(:token) { user.authentication_token }
before do
Factory(:ticket, :project => project)
user.permissions.create!(:thing => project, :action => "view")
end
let(:url) { "/api/v3/json/projects/#{project.id}/tickets" }
context "successful requests" do
it "can get a list of tickets" do
get url, :token => token
last_response.body.should eql(project.tickets.to_json)
end
end
end
This test looks remarkably like the one in spec/api/v2/tickets_spec.rb, except this time
you’re only testing for JSON responses and you’ve changed the URL that you’re
requesting to api/:version/:format/:path. When you run this spec with bin/rspec
spec/api/v3/json/tickets_spec.rb you’ll see that it’s giving you this error:
... uninitialized constant Api::V3
5 You can learn more about Sinatra at https://github.com/sinatra/sinatra/.