ruby-on-rails-3 - 未定义方法 `sign_in' for # 尝试使用 Devise 设置 RSpec 时出错

Question

我有一个 spec/controllers/add_to_carts_spec.rb :

require 'spec_helper'

describe CartItemsController do

  before (:each) do
    @user = Factory(:user)
    sign_in @user
  end

  describe "add stuff to the cart" do
    it "should add a product to the cart" do
      product = FactoryGirl.create(:product)
      visit products_path(product)
      save_and_open_page
      click_on('cart_item_submit')
    end
  end

end

和 /spec/support/spec_helper.rb :

# This file is copied to spec/ when you run 'rails generate rspec:install'
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'capybara/rspec'

# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

RSpec.configure do |config|
  config.mock_with :rspec
  config.use_transactional_fixtures = true
end

... 还加载了 /spec/support/devise.rb :

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

Guard 在后台运行并不断抛出:

Failures:

  1) CartItemsController add stuff to the cart should add a product to the cart
     Failure/Error: sign_in @user
     NoMethodError:
       undefined method `sign_in' for #<RSpec::Core::ExampleGroup::Nested_1::Nested_1:0x1057fd428>
     # ./spec/controllers/add_to_carts_spec.rb:7

在过去的几个小时里，我尝试了各种配置调整和不同的语法，但似乎没有任何改变。有任何想法吗？

(编辑以反射(reflect)较新的错误)

Answer 1

理想的解决方案是在 spec/support/devise.rb 创建一个文件，并通过以下代码在 Rspec 配置中包含设计测试助手:

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

type 参数仅在您的 Controller 规范中包含帮助程序，这是为了避免将来在测试模型或 View 时调用它时可能出现的问题。它是可选的。

我们决定添加一个单独的文件来包含帮助程序，而不是像上面的 solnic 那样将它们包含在规范中的原因是，如果规范重新生成，规范将被覆盖。