support/external_request: only allow stripe

spec/features/ticket_purchases_spec.rb

@@ -46,7 +46,6 @@ feature Registration do
           sleep(20)
         end
 
-        expect(page).to have_content("2 #{ticket.title} Tickets for $ 10")
         expect(current_path).to eq(conference_conference_registration_path(conference.short_title))
         expect(page.has_content?("2 #{ticket.title} Tickets for $ 10")).to be true
       end

spec/support/external_request.rb

@@ -1,6 +1,6 @@
 # Mock external requests to youtube
 require 'webmock/rspec'
-WebMock.allow_net_connect!
+WebMock.disable_net_connect!(allow_localhost: true, allow: %r{stripe.com})
 
 RSpec.configure do |config|
   config.before(:each) do