RSpec: Testing Token/API Key Authentication

gistfile1.rb

##
## TOKEN/API KEY AUTHENTICATION
## This was based on blogger-advanced
## Continuing from the class we built this in...
## if not already done, you'll need to make an ApiKey table in the DB 'rails g model ApiKey token:string'
##

# app/controllers/api/v1/articles_controller.rb
class Api::V1::ArticlesController < ApplicationController
  #...
  before_action :authenticate
  #...
  private
  
  def authenticate
    authenticate_or_request_with_http_token do |token, options|
      ApiKey.exists?(token: token)
    end
  end
end

# spec/support/auth_helper.rb
module AuthHelper
  def http_login
    token = 'SomeRandomToken'
    request.env['HTTP_AUTHORIZATION'] = ActionController::HttpAuthentication::Token.encode_credentials(token)
  end
end

# spec/spec_helper.rb (or rails_helper.rb, whichever, but in the existing RSpec.configure block include the AuthHelper module)
RSpec.configure do |config|
  config.include AuthHelper, :type => :controller
end

# Skipping the Factory girl setup steps (find them here http://www.rubydoc.info/gems/factory_girl/file/GETTING_STARTED.md)
# Summary: add 'factory_girl_rails' and 'database_cleaner' gems to your Gemfile
# From the link above, add in the code snippets from the 'Configure your test suite' and 'Linting factories' sections
# spec/factories.rb
FactoryGirl.define do
  factory :api_key do
    token "SomeRandomToken"
  end
  
    factory :author do
    name "John Doe"
    email "john@example.com"
    password "password"
  end

  factory :article do
    title "How to play cards"
    body  "It's pretty simple really..."
    author
  end
end

# controller spec (spec/controllers/app/v1)
require 'spec_helper'

RSpec.describe Api::V1::ArticlesController, :type => :controller do
  describe "GET index" do
    it "responds to json" do
      create(:api_key)
      create_list(:article, 2)
      http_login #this is the method call from the AuthHelper module
      get :index, format: 'json'

      items = JSON.parse(response.body)
      first_item = items.first

      expect(response.status).to eq(200)
      expect(items.count).to eq(1)
      expect(first_item["title"]).to eq("How to play cards")
    end
  end
end