feat: Configuring capybara for @javascript tests

We want to use selenium_chrome_headless only on tests which require javascript running (cookie preferences). For the rest of the tests, we want to use the default rack_test driver

Co-authored-by: Lucy Stringer <lucy.stringer@citizensadvice.org.uk>
Co-authored-by: Leeky <robert.lee-cann@citizensadvice.org.uk>

Author: 3 people

config/environments/test.rb

@@ -8,6 +8,8 @@
 # and recreated between test runs. Don't rely on the data there!
 
 Rails.application.configure do
+  config.hosts << "127.0.0.1"
+
   # Configure 'rails notes' to inspect Cucumber files
   config.annotations.register_directories("features")
   config.annotations.register_extensions("feature") { |tag| /#\s*(#{tag}):?\s*(.*)$/ }

features/cookie_preferences.feature

@@ -1,3 +1,4 @@
+@javascript
 Feature: Cookie preferences
 
   Scenario: Visiting a page for the first time

features/support/env.rb

@@ -7,6 +7,7 @@
 # files.
 
 require "cucumber/rails"
+require "capybara/cucumber"
 
 # frozen_string_literal: true
 
@@ -59,3 +60,7 @@
 # The :transaction strategy is faster, but might give you threading problems.
 # See https://github.com/cucumber/cucumber-rails/blob/master/features/choose_javascript_database_strategy.feature
 # Cucumber::Rails::Database.javascript_strategy = :truncation
+
+Capybara.configure do |config|
+  config.javascript_driver = :selenium_chrome_headless
+end