Visit a location in a Capybara rspec spec without following a redirect.

spec_helper.rb

# ...

RSpec.configure do |config|
  # ...

  config.include VisitWithoutRedirectsHelper, :type => :request

  # ...
end

visit_without_redirects_helper.rb

module VisitWithoutRedirectsHelper
  def redirected_url
    page.response_headers["Location"]
  end
  
  # This replicates the normal #visit method in capybara but does not follow any redirects.
  # This is useful when needing to check redirects to external sites.
  def visit_without_redirects(url)
    page.driver.browser.reset_host!
    page.driver.browser.process(:get, url, {})
  end
end