Michael Hartl撰写的Rails教程第6章验证用户

Question

我似乎无法弄清楚为什么这三个测试没有通过。 我对Rails很陌生，但我觉得至少在本教程中，我似乎已经尝试了所有方法。 我敢肯定，这很明显，但是我寻找答案的尝试是徒劳的。 我的失败测试如下（摘自Michael Hartl的Rails教程）。 谢谢。

失败：

1）如果密码不存在，则用户使用有效的密码返回认证方法的值失败/错误：{{eq found_user.authenticate（@ user.password）}} NoMethodError：未定义的方法对authenticate' for nil:NilClass # ./spec/models/user_spec.rb:94:in在“（5级）

2）如果密码不存在，则用户使用无效的密码返回验证方法的值失败/错误：let（：user_for_invalid_password）{found_user.authenticate（“ invalid”）} NoMethodError：未定义的方法authenticate' for nil:NilClass # ./spec/models/user_spec.rb:98:in块（5级）中'＃./spec authenticate' for nil:NilClass # ./spec/models/user_spec.rb:98:in `在'的块（5级）中'

3）如果密码不存在，则用户使用无效的密码返回身份验证方法的值失败/错误：let（：user_for_invalid_password）{found_user.authenticate（“ invalid”）} NoMethodError：未定义的方法authenticate' for nil:NilClass # ./spec/models/user_spec.rb:98:in ' authenticate' for nil:NilClass # ./spec/models/user_spec.rb:98:in块（5级）./spec authenticate' for nil:NilClass # ./spec/models/user_spec.rb:98:in `在'中的块（5级）

User_spec测试

需要'spec_helper'

describe User do

  before do 
    @user = User.new(name: "Example User", email: "user@example.com",
                      password: "foobar", password_confirmation: "foobar")
  end


  subject { @user }

  it { should respond_to(:name) }
  it { should respond_to(:email) }
  it { should respond_to(:password_digest) }
  it { should respond_to(:password) }
  it { should respond_to(:password_confirmation) }
  it { should respond_to(:authenticate) }

  it { should be_valid }

  describe "when name is not present" do
    before { @user.name = " " }
    it { should_not be_valid }
  end

  it "should be valid" do
    expect(@user).to be_valid
  end

  describe "when email is not present" do
    before { @user.email = " " }
    it { should_not be_valid }
  end

  describe "when name is too long" do
    before { @user.name = 'a' * 51 }
    it { should_not be_valid }
  end

  describe "when email format is invalid" do
  it "should be invalid" do
    addresses = %w[user@foo,com user_at_foo.org example.user@foo.
                   foo@bar_baz.com foo@bar+baz.com]
    addresses.each do |invalid_address|
      @user.email = invalid_address
      expect(@user).not_to be_valid
    end
  end
end

describe "when email format is valid" do
  it "should be valid" do
    addresses = %w[user@foo.COM A_US-ER@f.b.org frst.lst@foo.jp a+b@baz.cn]
    addresses.each do |valid_address|
      @user.email = valid_address
      expect(@user).to be_valid
    end
  end
end

describe "when email address is already taken" do
  before do
    user_with_same_email = @user.dup
    user_with_same_email.email = @user.email.upcase
    user_with_same_email.save
  end

  it { should_not be_valid }
  end

  describe "when password is not present" do
    before do
      @user = User.new(name:"Example User", email: "user@example.com",
                        password: " ", password_confirmation: " ")
    end
    it { should_not be_valid }


  describe "when password does not match confirmation" do
    before { @user.password_confirmation = "mismatch" }
    it { should_not be_valid }
  end

  describe "with a password thats too short" do
    before { @user.password = @user.password_confirmation = "a" * 5 }
    it { should be_invalid }
  end

  describe "return value of authenticate method" do
  before { @user.save }
  let(:found_user) { User.find_by(email: @user.email) }

  describe "with valid password" do
    it { should eq found_user.authenticate(@user.password) }
  end

  describe "with invalid password" do
    let(:user_for_invalid_password) { found_user.authenticate("invalid") }

    it { should_not eq user_for_invalid_password }
    specify { expect(user_for_invalid_password).to be_false }
  end
end

结束

用户模型

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

end

Answer 1

您发现错误，因为found_user为nil。

那是因为when password is not present您没有关闭when password is not present正确描述块。 因此，发生的情况是，使用无效密码设置了这个无效的@user ，并将其@user到失败的测试用例。

  describe "when password is not present" do
    before do
      @user = User.new(name:"Example User", email: "user@example.com",
                       password: " ", password_confirmation: " ")
    end
    it { should_not be_valid }
  end  ### Add end here

另外，从文件底部删除最后end 。