RSpec 如何存根打开? [英] RSpec how to stub open?

问题描述

我一直在尝试存根 open，open-uri 版本，但没有成功.

I've been trying to stub open, the open-uri version, and I'm not succeeding.

我尝试执行以下操作，但请求一直通过:

I've tried doing the following but the request keeps going through:

Kernel.should_receive(:open).and_return("Whatever for now")

我也尝试过

OpenURI::OpenRead.should_receive(:open).and_return("Whatever for now")

自从我追踪到那是在 OpenURI 中发出 HTTP 请求的地方.

Since I tracked down that was where HTTP requests were made in OpenURI.

预先感谢您的任何建议！

Thanks in advance for any suggestions!

推荐答案

在谷歌上呆了一段时间后，我在 Stack Overflow 上找到了一个解决方案(我不敢相信我以前没有找到这个).

I found a solution here on Stack Overflow after some more time on Google (I can't believe I didn't find this before).

解释取自此处，由Tony Pitluga(不可链接).

Explanation taken from here and written by Tony Pitluga (not linkable).

如果你在一个对象的上下文中调用 sleep ，你应该在对象上存根它[...]
关键是，在调用 sleep 的上下文中，将 sleep 置入任何self".

If you are calling sleep within the context of an object, you should stub it on the object[...]
The key is, to stub sleep on whatever "self" is in the context where sleep is called.

所以我这样做了，一切都解决了:

So I did this and it all worked out:

let(:read) { mock('open') }

it "should return the new log-level when the log level was set successfully" do
    read.stub(:read).and_return('log-level set to 1')
    kannel.should_receive(:open).and_return(read)

    kannel.set_log_level(1).should == 1
  end

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