Тестовый пользователь заходит в свой профиль с помощью rspec capybara, Warden gems on rails

Я новичок в Ruby on rails и программировании в целом. В задании, которое я выполняю, меня попросили создать тест, в котором пользователь посещает свой профиль. Установлены гемы Rspec, Devise и капибара.

Вот мой profiles_spec:

require 'rails_helper'

describe "Visiting profiles" do 

  include TestFactories
  before do 
    @user = authenticated_user
    @post = associated_post(user: @user)
    @comment = Comment.new(user: @user, post: @post, body:"A comment")
    allow(@comment).to receive(:send_favorite_emails)
    @comment.save
    user = FactoryGirl.create(:user)
    login_as(user, :scope => :user)

  end

  describe "not signed in" do

    it "shows profile" do 
      visit user_path(@user)
      expect(current_path).to eq(user_path(@user))

      expect(page).to have_content(@user.name)
      expect(page).to have_content(@post.title)
      expect(page).to have_content(@comment.body)
    end

  end

  describe "user visting own profile" do 

  it "shows profile" do 
    visit user_path(current_user)

    expect(current_path).to eq(user_path(user))
    expect(page).to have_content(user.name)
    expect(page).to have_content(@post.title)
    expect(page).to have_content(@comment.body)
    end
  end
end

Вот мои TestFactory:

module TestFactories 
  include Warden::Test::Helpers
  Warden.test_mode!
    def associated_post(options = {})
   post_options = {
     title: 'Post title',
     body: 'Post bodies must be pretty long.',
     topic: Topic.create(name: 'Topic name',description: 'the description of a topic must be long'),
     user: authenticated_user
   }.merge(options)

   Post.create(post_options)
 end

 def authenticated_user(options = {})
  user_options = { email: "email#{rand}@fake.com", password: 'password'}.merge(options)
  user = User.new( user_options)
  user.skip_confirmation!
  user.save
  user 
 end

 FactoryGirl.define do
  factory :user do
    email '[email protected]'
    password 'f4k3p455w0rd'
    user = FactoryGirl.create(:user)
    login_as(user, :scope => :user)
    # if needed
    # is_active true
  end
end

end 

Вот моя модель пользователя:

class User < ActiveRecord::Base
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable, :confirmable

  has_many :posts, dependent: :destroy
  has_many :comments, dependent: :destroy
  has_many :votes, dependent: :destroy
  has_many :favorites, dependent: :destroy

  mount_uploader :avatar, AvatarUploader

  def admin?
    role == 'admin'
  end

  def moderator?
    role == 'moderator'
  end

  def favorited(post)
    favorites.where(post: post.id).first
  end

  def voted(post)
    votes.where(post: post.id).first
  end

end

Когда я запускаю тест профилей, я получаю эту ошибку:

`<module:TestFactories>': uninitialized constant TestFactories::FactoryGirl (NameError)

Я не уверен, правильно ли я использую надзирателя.

Спасибо.