Capybara does not pass header after form submit #328

PeterBloom opened this Issue Apr 21, 2011 · 1 comment

2 participants


I am building a Rails 3 app which renders different views for mobile devices (using jQuery Mobile) and regular desktop browsers. I am testing with Cucumber/Capybara, and have separate test suites for mobile and browser. I am able to set a mobile User-Agent string in the request's HTTP header just fine using the ‘headers hack’ found here…

The Problem...

Most of my mobile Cucumber steps work fine (e.g., I set the mobile header in a step, thereafter the mobile views render). However after a form submit, the test then renders a browser view of the next step (not the mobile view I want). I think this may be because Capybara is dropping the header after a form submit action.

I tried to test this by adding a logger to my controller action so I could look at the user_agent headers, as follows:

def show
# …"Headers: #{request.user_agent}")
# …

I used an iPhone header (Buyer is the resource). In my test.log I see:

For the create action…

Started POST "/buyers" for at 2011-04-19 16:49:18 -0700
Processing by BuyersController#create as HTML
Headers: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7
Redirected to
Completed 302 Found in 7ms

For the subsequent show action (note ‘Headers:’ is blank)…

Started GET "/buyers/1" for at 2011-04-19 16:49:18 -0700
Processing by BuyersController#show as HTML
Completed 200 OK in 4ms (Views: 2.8ms | ActiveRecord: 1.4ms)

As one would expect, the a ‘show me the page’ step then renders the browser page, not the mobile page I want.

How can I preserve the header so all my mobile steps run in my mobile test suite?


This is more of a question than an issue, tbh. In Rack-Test there is currently there no way of achieveing this short of monkey patching that I am aware of. I've been thinking about adding a header option to the rack-test driver, which would allow the passing in of different header options. If you're using a lot of JavaScript, Selenium might be a better fit anyway and allows you to set the user agen freely, IIRC.


@jnicklas jnicklas closed this in a00435d Apr 25, 2011
@radar radar added a commit to reinteractive/capybara that referenced this issue Nov 1, 2011
@jnicklas Added :headers option to rack_test driver, closes #328 0aa1a13
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