ruby-on-rails-3 - stack level too deep with `puts response` in rspec

Question

Having a strange problem with rspec and rails in controller tests. Whenever we add puts response inside a spec, it outputs lots of these

200
{"Content-Type"=>"text/html; charset=utf-8"}
200
{"Content-Type"=>"text/html; charset=utf-8"}
200
{"Content-Type"=>"text/html; charset=utf-8"}
200
{"Content-Type"=>"text/html; charset=utf-8"}

and then fails with SystemStackError: stack level too deep. Inspecting the response via pry works great, printing other stuff also works fine.

Upgrading to latest rspec (2.11) does not make a difference. We noticed that the puts calls to_a on the response, which returns an array of [@status, @header, self], so somehow it causes this strange recursion?

update: here's a gist with the code + spec

Answer 1

我相信您在机架中遇到了错误。 [rack_response].flatten进入无限循环。有关更多信息，请参阅这些问题：

• https://github.com/rspec/rspec-rails/issues/601
• https://github.com/rspec/rspec-expectations/issues/166
• https://github.com/rack/rack/issues/419

解决方案是不对响应对象本身设置任何期望，而是分别对状态、标头或正文设置期望，例如：

last_response.status.should eq(200)
last_response.body.should include("some text")
last_response.headers.should include("Content-Type" => "text/plain")