Rails: Login with remembering tests fail one after the other

Question

This is part of the railstutorial.org for rails 7.I'm testing the correct working of the login with remembering

require 'test_helper'

class SessionsHelperTest < ActionView::TestCase
  def setup
    @user = users(:tony)
    remember(@user)
  end
  
  test 'current user returns right user when session is nil' do
    assert_equal @user,current_user
    assert is_logged_in?
  end

  test 'current user returns nil when remember digest is wrong' do
    @user.update_attribute(:remember_digest,User.digest(User.new_token))
    assert_nil current_user
  end
end

they refers to this helper

  def current_user
    if (user_id = session[:user_id])
      @current_user ||= User.find_by(id: user_id)
    elsif (user_id = cookies.encrypted[: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

the first test fails

 FAIL SessionsHelperTest#test_current_user_returns_right_user_when_session_is_nil (0.10s)
        --- expected
        +++ actual
        @@ -1 +1 @@
        -#<User id: 339078012, name: "tony fusco", email: "[email protected]", created_at: "2022-10-04 07:33:09.980286000 +0000", updated_at: "2022-10-04 07:33:09.980286000 +0000", password_digest: [FILTERED], remember_digest: nil>
        +nil
        test/helpers/sessions_helper_test.rb:10:in `block in <class:SessionsHelperTest>'

and if i comment out part of a line
if user #&& user.authenticated?(cookies[:remember_token])

the second test fails

FAIL SessionsHelperTest#test_current_user_returns_nil_when_remember_digest_is_wrong (2.29s)
        Expected #<User id: 339078012, name: "tony fusco", email: "[email protected]", created_at: "2022-10-04 08:42:46.512404000 +0000", updated_at: "2022-10-04 08:42:48.782076000 +0000", password_digest: [FILTERED], remember_digest: "$2a$04$Haqx77Y7NRV/fCcirQiEU.tZnuqqXGIxD0n81FKTy84..."> to be nil.
        test/helpers/sessions_helper_test.rb:16:in `block in <class:SessionsHelperTest>'

p.s I'm reviewing the other questions about this argument,since they are all different I'm posting this, yet this topic is full of issues