Rspec Devise helper with support for routing :authenticated and :unauthenticated tests

devise.rb

# spec/support/devise.rb

module Devise::RoutingTestHelpers
  attr_accessor :request

  def initialize(*args)
    @request ||= Hashie::Mash.new env: {}
    super(*args)
  end

  def request
    @request ||= Hashie::Mash.new env: {}
  end

  def setup_controller(controller=subject)
    request.env['action_controller.instance'] = @controller = controller
  end

  def sign_in!
    NilClass.any_instance.stubs(:authenticate?).returns(true)
  end

  def sign_out!
    NilClass.any_instance.unstub(:authenticate?)
    NilClass.any_instance.stubs(:authenticate?).returns(false)
  end
end

RSpec.configure do |config|
  config.include Devise::TestHelpers, type: :controller
  config.include Devise::RoutingTestHelpers, type: :routing
  config.include Devise::TestHelpers, type: :routing

  config.before(:each, type: :routing) do
    setup_controller
    sign_out!
  end
end

home_controller_spec.rb

# spec/routing/home_controller_spec.rb

require 'spec_helper'

describe HomeController do
  describe 'root path' do
    context 'when signed out' do
      it 'routes to #landing' do
        expect(get: '/').to route_to controller: 'home', action: 'landing'
      end
    end

    context 'when signed in' do
      before { sign_in! }

      it 'routes to #index' do
        expect(get: '/').to route_to controller: 'home', action: 'index'
      end
    end
  end
end