RoR rspec test en échec avec l'erreur " le bloc (2 niveaux) dans <top (requis)>

Je suis Hartls Rails tutoriel et je suis bloqué à la fin du Chapitre 6.
Soudain, certains de mes tests ont échoué avec le même message d'erreur:

C:\Users\JMA\Projekte\sampleapp>bundle exec rspec spec/
.F......F...FFF....

Failures:

  1) User
     Failure/Error: it { should respond_to(:passwors_confirmation)}
       expected #<User id: nil, name: "Example User", email: "[email protected]",
 created_at: nil, updated_at: nil, password_digest: "$2a$04$OMnlZgC9yWhxbQizs8MG
9uPMCd8LmMlO5MZzkuQyM8it..."> to respond to :passwors_confirmation
     # ./spec/models/user_spec.rb:16:in `block (2 levels) in <top (required)>'

  2) User when name is not present when email format is valid should be valid
     Failure/Error: expect(@user).to be_valid
       expected #<User id: nil, name: " ", email: "[email protected]", created_at: ni
l, updated_at: nil, password_digest: "$2a$04$PtGxi4DjJWFezLFYy1jW5eaI7C/xxyBLXAG
zPepflo8r..."> to be valid, but got errors: Name can't be blank
     # ./spec/models/user_spec.rb:51:in `block (5 levels) in <top (required)>'
     # ./spec/models/user_spec.rb:49:in `each'
     # ./spec/models/user_spec.rb:49:in `block (4 levels) in <top (required)>'

  3) User when name is not present return value of authenticate method with vali
d password
     Failure/Error: before { @user.safe }
     NoMethodError:
       undefined method `safe' for #<User:0x502bc30>
     # ./spec/models/user_spec.rb:86:in `block (4 levels) in <top (required)>'

  4) User when name is not present return value of authenticate method with inva
lid password
     Failure/Error: before { @user.safe }
     NoMethodError:
       undefined method `safe' for #<User:0x50333a0>
     # ./spec/models/user_spec.rb:86:in `block (4 levels) in <top (required)>'

  5) User when name is not present return value of authenticate method with inva
lid password
     Failure/Error: before { @user.safe }
     NoMethodError:
       undefined method `safe' for #<User:0x503b848>
     # ./spec/models/user_spec.rb:86:in `block (4 levels) in <top (required)>'

Finished in 0.52003 seconds
19 examples, 5 failures

Failed examples:

rspec ./spec/models/user_spec.rb:16 # User
rspec ./spec/models/user_spec.rb:47 # User when name is not present when email f
ormat is valid should be valid
rspec ./spec/models/user_spec.rb:90 # User when name is not present return value
 of authenticate method with valid password
rspec ./spec/models/user_spec.rb:96 # User when name is not present return value
 of authenticate method with invalid password
rspec ./spec/models/user_spec.rb:97 # User when name is not present return value
 of authenticate method with invalid password

Randomized with seed 37132

Mon user_specs.rb ressemble à ceci:

require 'spec_helper'
describe User do
before do
@user = User.new(name: "Example User", email: "[email protected]",
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(:passwors_confirmation)}
it { should be_valid }
describe"when name is not present" do
before { @user.name = " " }
it { should_not be_valid}
describe "when email is not present" do
before { @user.email = " " }
it { should_not be_valid}   
end 
describe "when name is to 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
adresses = %w[user@foo,com user_at_foo.org example.user@foo. 
foo@bar_baz.com foo@bar+baz.com]
adresses.each do |invalid_adress|
@user.email = invalid_adress
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 adress 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     
it { should respond_to(:authenticate) }
describe "when password is not present" do
before do
@user = User.new(name: "Example User", email: "[email protected]",
password: " ", password_confirmation: " ")
end
it { should_not be_valid }
end
describe "when password doesn't match confirmation" do
before { @user.password_confirmation = "mismatch" }
it { should_not be_valid }
end
describe "with a password that's to short" do
before { @user.password = @user.password_confirmation = "a" * 5 }
it { should be_invalid }
end
describe "return value of authenticate method" do
before { @user.safe }
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_inavlid_password) { found_user.authenticate("invalid") }
it { should_not eq user_for_inavlid_password }
specify { expect(user_for_inavlid_password).to be_false }
end 
end 
end
end

utilisateurs.rb

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

Il est apparu après l'ajout du mot de passe et password_confirmation attributs de l'Utilisateur du modèle. La où le passage jusqu'alors. J'ai continué le tuto parce que j'ai lu à propos de cet échec, et qu'elle sera traitée au plus tard dans le tutoriel. Maintenant, mes tests sont toujours pas et je ne sais pas pourquoi. Des idées?