测试未通过：未定义方法“验证！”对于 nil:NilClass?

我有以下失败：

Failures:

  1) RelationshipsController creating a relationship with Ajax should increment the Relationship count
     Failure/Error: xhr :post, :create, relationship: { followed_id: other_user.id }
     NoMethodError:
       undefined method `authenticate!' for nil:NilClass
     # ./spec/controllers/relationships_controller_spec.rb:14:in `block (4 levels) in <top (required)>'
     # ./spec/controllers/relationships_controller_spec.rb:13:in `block (3 levels) in <top (required)>'

但很奇怪的是，如果我访问该网站，事情就会起作用（followers如果我单击，计数器就会增加Follow button:

最奇怪的是，没有任何认证！中的方法关系_控制器_规范.rb:

require 'spec_helper'

describe RelationshipsController do

  let(:user) { FactoryGirl.create(:user) }
  let(:other_user) { FactoryGirl.create(:user) }

  before { sign_in user }

  describe "creating a relationship with Ajax" do

    it "should increment the Relationship count" do
      expect do
        xhr :post, :create, relationship: { followed_id: other_user.id }
      end.to change(Relationship, :count).by(1)
    end

    it "should respond with success" do
      xhr :post, :create, relationship: { followed_id: other_user.id }
      response.should be_success
    end
  end

  describe "destroying a relationship with Ajax" do

    before { user.follow!(other_user) }
    let(:relationship) { user.relationships.find_by_followed_id(other_user) }

    it "should decrement the Relationship count" do
      expect do
        xhr :delete, :destroy, id: relationship.id
      end.to change(Relationship, :count).by(-1)
    end

    it "should respond with success" do
      xhr :delete, :destroy, id: relationship.id
      response.should be_success
    end
  end
end

控制器中都没有：

class RelationshipsController < ApplicationController
  before_filter :authenticate_user!

  def create
    @user = User.find(params[:relationship][:followed_id])
    current_user.follow!(@user)
    respond_to do |format|
      format.html { redirect_to @user }
      format.js
    end
  end

  def destroy
    @user = Relationship.find(params[:id]).followed
    current_user.unfollow!(@user)
    respond_to do |format|
      format.html { redirect_to @user }
      format.js
    end
  end
end

可能是什么问题呢？

（顺便说一句，这些测试是按照Ruby on Rails 教程 http://ruby.railstutorial.org/ruby-on-rails-tutorial-book。之后，我删除了所有身份验证系统，因为我想使用Devise.)

Setting config.include Devise::TestHelpers, :type => :controller在更高版本的 Devise 中不再起作用。您需要做的是注销匿名用户以设置正确的变量：

before :each do
  sign_out :user
end