How can I set the request IP in a Capybara feature spec?

Question

I am using RSpec and Capybara for my feature specs on my Rails 5.1 app. I want to fake the request IP to '1.2.3.4' for a single spec.

I've tried the following with Poltergeist...

before do
  page.driver.add_headers 'REMOTE_HOST' => '1.2.3.4'
end

However, placing a pry in my controller I see that request.headers['REMOTE_HOST'] is 127.0.0.1.

Sounds like this is more applicable to a controller spec or request spec than a feature spec. — Thomas Walpole
I want to test different behavior in my views based on the request IP — HarlemSquirrel
That can be done from a view spec or request spec or controller spec (if you tell it to render the views). All places you could modify the request, and/or where its normal to mock/stub things (unlike feature tests) — Thomas Walpole

HarlemSquirrel HarlemSquirrel · Accepted Answer · 2017-07-13T15:29:38

I solved this by stubbing ActionDispatch::Request#remote_ip

allow_any_instance_of(ActionDispatch::Request).to receive(:remote_ip) { '1.2.3.4' }

I would prefer altering the actual request if possible.