如何在rails控制器中启用设计辅助方法？

Question

我已经看过关于这个主题的其他帖子，我知道需要通过将它们添加到test_helper或spec_helper文件来启用设计辅助方法，但这似乎不起作用。

我还应该考虑解决这个问题？

我的rspec erro，

Failures:

  1) LunchersController GET root renders index view for non-logged in users
     Failure/Error: get :index, {}
     NoMethodError:
       Could not render layout: undefined method `authenticate' for nil:NilClass
     # ./spec/controllers/lunchers_controller_spec.rb:6:in `block (3 levels) in <top (required)>'

我的spec_helper相关行

RSpec.configure do |config|
  config.include Devise::TestHelpers, :type => :controller

end

我没有测试/我已经创建了一个并添加了一个test_helper来查看是否包含以下帮助，但它没有。

class ActionController::TestCase
  include Devise::TestHelpers
end

my gemfile

source 'https://rubygems.org'
ruby "2.1.0"

gem 'rails', '4.0.1'
gem 'sass-rails', '~> 4.0.0'
gem 'uglifier', '>= 1.3.0'
gem 'coffee-rails', '~> 4.0.0'
gem 'jquery-rails'
gem 'jbuilder', '~> 1.2'
gem "haml", "~> 4.0.4"
gem "angularjs-rails", "~> 1.2.7"
gem "zeus", "~> 0.13.3"
gem "pg", "~> 0.17.1"
gem "devise"
gem "omniauth"
gem "omniauth-twitter"
gem "uuidtools"
gem "quiet_assets", "~> 1.0.2"
gem "thin", "~> 1.6.1"
gem "jader", "~> 0.0.8"
gem "ngmin-rails", "~> 0.4.0"
gem 'foundation-rails'
gem "font-awesome-rails"
gem "twitter"

group :development, :test do
  gem "rspec-rails", "~> 2.14.1"
  gem 'factory_girl_rails', '4.2.1'
  gem "mocha", "~> 1.0.0"
  gem "database_cleaner", "~> 1.2.0"
  gem 'pry'
  gem 'pry-debugger'
end

group :doc do
  gem 'sdoc', require: false
end