Ruby on rails 如何排除此错误？

我正在学习Michael Hartl的Rails教程，目前正在学习第8章第8.55节。我正试图通过那个测试来排除一个失败，但我不知道该在哪里解决

FAIL["test_current_user_returns_right_user_when_session_is_nil", SessionsHelperTest, 0.05582] test_current_user_returns_right_user_when_session_is_nil#SessionsHelperTest (0.06s)
    --- expected
    +++ actual
    @@ -1 +1 @@
    -#<User id: 584273342, name: "Kyle Example", email: "kyle@example.com", created_at:             "2014-12-27 20:09:35", updated_at: "2014-12-27 20:09:35", password_digest:    "$2a$04$yK7dSRppfGCqCbrXXZ34meDB2jEulxy9BDVNH32qLDz...", remember_digest:   "$2a$04$GT65nJ.fE90LasXpaT1HruCChf.hl.4fvMrtx2iV48V...">
    +nil
    test/helpers/sessions_helper_test.rb:11:in `block in <class:SessionsHelperTest>'

用户模型

class User < ActiveRecord::Base
  attr_accessor :remember_token
  before_save { email.downcase! }
  validates :name, presence: true, length: { maximum: 50 }
  VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-]+(\.[a-z\d\-]+)*\.[a-z]+\z/i
  validates :email, presence: true, length: { maximum: 255 }, 
    format: { with: VALID_EMAIL_REGEX },
    uniqueness: { case_sensitive: false }
  has_secure_password
  validates :password, length: { minimum: 6 }

  # Returns the hash digest of the given string. 
  def User.digest(string)
    cost = ActiveModel::SecurePassword.min_cost ? BCrypt::Engine::MIN_COST :
      BCrypt::Engine.cost
    BCrypt::Password.create(string, cost: cost)
  end

  #Returns a random token.
  def User.new_token
    SecureRandom.urlsafe_base64
  end

  #Remembers a user in the database for use in persistent sessions 
  def remember
    self.remember_token = User.new_token
    update_attribute(:remember_digest, User.digest(remember_token))
  end

  #Returns true if the given token matches the digest.
  def authenticated?(remember_token)
    return false if remember_digest.nil?
    BCrypt::Password.new(remember.digest).is_password?(remember_token)
  end

  # Forgets a user. 
  def forget
    update_attribute(:remember_digest, nil)
  end
end

class用户

你知道是什么导致了这一切吗

你有两个

def当前用户

模块会话助手中的方法

删除此文件（它是旧文件，不检查是否存在
cookies

它目前正在您的测试中使用，因为它的定义如下更新了一个。
您有两个

def当前用户

模块会话助手中的方法

删除此文件（它是旧文件，不检查是否存在
cookies

它目前正在您的测试中使用，因为它的定义如下更新的一个。
感谢您解决了故障！我现在遇到了一些其他错误，我将花一些时间来处理和排除故障。感谢您解决了故障！现在我遇到了一些其他错误，我将花一些时间来解决和排除故障。
module SessionsHelper

  # Logs in the given user.
  def log_in(user)
    session[:user_id] = user.id
  end

  #Remembers a user in a persistent session.
  def remember(user)
    user.remember
    cookies.permanent.signed[:user_id] = user.id
    cookies.permanent[:remember_token] = user.remember_token
  end

  #Returns the user corresponding to the remember token cookie.
  def current_user
    if (user_id = session[:user_id])
      @current_user ||= User.find_by(id: user_id)
    elsif (user_id = cookies.signed[:user_id])
      user = User.find_by(id: user_id)
      if user && user.authenticated?(cookies[:remember_token])
        log_in user
        @current_user = user
      end
    end
  end

  #Returns the current logged-in user (if any). 
  def current_user
    @current_user ||= User.find_by(id: session[:user_id])
  end

  #Returns true if the user is logged in, false otherwise. 
  def logged_in?
    !current_user.nil? 
  end

  def log_out
    session.delete(:user_id)
    @current_user = nil
  end

  # Forgets a persistent session.
  def forget(user)
    user.forget
    cookies.delete(:user_id)
    cookies.delete(:remember_token)
  end

  # Logs out the current user.
  def log_out
    forget(current_user)
    session.delete(:user_id)
    @current_user = nil
  end
end

class User < ActiveRecord::Base
  attr_accessor :remember_token
  before_save { email.downcase! }
  validates :name, presence: true, length: { maximum: 50 }
  VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-]+(\.[a-z\d\-]+)*\.[a-z]+\z/i
  validates :email, presence: true, length: { maximum: 255 }, 
    format: { with: VALID_EMAIL_REGEX },
    uniqueness: { case_sensitive: false }
  has_secure_password
  validates :password, length: { minimum: 6 }

  # Returns the hash digest of the given string. 
  def User.digest(string)
    cost = ActiveModel::SecurePassword.min_cost ? BCrypt::Engine::MIN_COST :
      BCrypt::Engine.cost
    BCrypt::Password.create(string, cost: cost)
  end

  #Returns a random token.
  def User.new_token
    SecureRandom.urlsafe_base64
  end

  #Remembers a user in the database for use in persistent sessions 
  def remember
    self.remember_token = User.new_token
    update_attribute(:remember_digest, User.digest(remember_token))
  end

  #Returns true if the given token matches the digest.
  def authenticated?(remember_token)
    return false if remember_digest.nil?
    BCrypt::Password.new(remember.digest).is_password?(remember_token)
  end

  # Forgets a user. 
  def forget
    update_attribute(:remember_digest, nil)
  end
end

#Returns the current logged-in user (if any). 
def current_user
  @current_user ||= User.find_by(id: session[:user_id])
end