测试使用 cookie 的 Rails 助手
我在 app/helpers/application_helper.rb 中有一个调用 cookies 的方法。这是完全允许的；这个方法在我的开发环境中运行得非常好，并且知道我说的 cookie 的意思。
也会出现错误
NoMethodError: undefined method `cookies' for nil:NilClass
我正在使用 TestUnit 测试此帮助程序（在 test/unit/helpers/application_helper_test.rb 中），即使对于四个不设置 cookie 的测试， 。这与需要“使用 cookie_jar 在测试中设置 cookie”无关，因为问题不是我设置 cookie 而我的助手无法识别它们，问题是正在调用的对象 cookie为nil。
我不确定正在调用哪个控制器对象 cookies，因此我对它们进行了 p 全部检查，发现来自 @controller 、@request 和 @response，只有 @response 为 nil。所以我尝试将其设置为“牛”。确实如此！我的错误发生了变化：
NoMethodError: undefined method `cookies' for "cow":String
所以看来我只需要删除@response。我该怎么做？
或者我在这里太过分了，让事情变得过于复杂了？
I have a method in app/helpers/application_helper.rb that calls cookies. Which is totally allowed; this method is working wonderfully in my dev environment and knows what I mean when I say cookies.
I am testing this helper with TestUnit (in test/unit/helpers/application_helper_test.rb) and getting the error
NoMethodError: undefined method `cookies' for nil:NilClass
Even for four tests that do not set cookies. This has nothing to do with needing to 'set cookies in the test using cookie_jar', because the issue isn't that I'm setting cookies and my helper isn't recognizing them, the issue is that the object cookies is being called on is nil.
I wasn't sure which controller object cookies was being called on, so I p'd them all and found that, out of @controller, @request, and @response, only @response is nil. So I tried setting it to "cow". And indeed! My error changes:
NoMethodError: undefined method `cookies' for "cow":String
So it seems like I just need to stub out @response. How do I do that?
Or am I way out of line here and overcomplicating things?
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将此设置添加到执行此方法的所有测试中：
Add this setup to all of your tests that exercise this method: