Port of the Rails app when running Cucumber tests

Question

Is there a way to get, in the test, the port in which the rails app is running during cucumber test? I tried Capybara.server_port but that's nil.

Thanks.

possible duplicate of [Cucumber / Capybara -- how to get the host and port of the current execution](http://stackoverflow.com/questions/6791601/cucumber-capybara-how-to-get-the-host-and-port-of-the-current-execution) — Ciro Santilli OurBigBook.com, Oct 09 '14 at 14:44
possible duplicate of [How to find the local port a rails instance is running on?](http://stackoverflow.com/questions/1554267/how-to-find-the-local-port-a-rails-instance-is-running-on) — Brad Werth, Oct 09 '14 at 22:35

Pablo Fernandez · Accepted Answer · 2011-12-09T17:01:30.163

5

When using the selenium driver, the port can be found on:

Capybara.current_session.driver.rack_server.port

and when using the webkit driver, it can be found on:

Capybara.current_session.driver.server_port

Alternative, you can set

Capybara.server_port

to a known value and use that.

edited Dec 09 '11 at 17:01

answered Nov 16 '11 at 16:40

Pablo Fernandez

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score 3 · Answer 2 · answered Oct 24 '11 at 16:37

My understanding is that if you're using rack-test, the default Capybara driver, then there's isn't actually any real web server running to make requests to.

If you want to view your app as Cucumber/Capybara would, then you'd need to start it up manually on a chosen port:

$ RAILS_ENV=test rails s -p 4000

And then have something like this in env.rb:

Capybara.configure do |config|
  config.run_server = false
  config.app_host = "http://localhost:4000"
end

Port of the Rails app when running Cucumber tests

2 Answers2

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