Rails教程9.25测试失败，预期“”为零

Question

我重发这个问题是因为我在rails教程的这一部分也遇到了问题。我发现了一种不同的解决方法，现在测试通过了，但我想知道，因为我在这方面是如此新手，它是否有相同的效果？

user_login_test.rb

 require 'test_helper'

class UsersLoginTest < ActionDispatch::IntegrationTest

  # I deleted most of the file as Stack kept telling me I was posting too much code and not enough problem.

  test 'Login with remember' do
    log_in_as(@user, remember_me: '1')
    assert_not_nil cookies['remember_token']
  end

  test 'Login without remember' do
    # Log in to set the cookie.
    log_in_as(@user, remember_me: '1')
    # log in again and verify that the cookie is deleted.
    log_in_as(@user, remember_me: '0')

** This seems to be the problem line of code **
    assert_nil cookies['remember_token']

  end
end ```

I replaced it with 

断言cookies“‘remember_token”。空白吗？

test now passes, but am I allowing a bug by not forcing nil or as long as the cookie is blank then its functionality is the same? 

I can add sessions_controller.rb and test_helper.rb if it helps, or any other files that would be helpful. 

Answer 1

如果将cookies键值设置为nil，则会被解释为空字符串。

因此，您必须问问自己，应用程序中cookies['remember_token'] = ""的定义是什么。如果在您的上下文中""等同于nil，那么使用#blank?进行断言将是很好的。