Move RSpec setup for Capybara to its own support file

spec/spec_helper.rb

@@ -10,19 +10,13 @@ end
 ENV["RAILS_ENV"] ||= 'test'
 require File.expand_path("../../config/environment", __FILE__)
 require 'rspec/rails'
-require 'capybara/rails'
-require 'capybara/rspec'
 require 'webmock/rspec'
 require 'email_spec'
 require 'sidekiq/testing/inline'
-require 'capybara/poltergeist'
-
-Capybara.javascript_driver = :poltergeist
-Capybara.default_wait_time = 10
 # Requires supporting ruby files with custom matchers and macros, etc,
 # in spec/support/ and its subdirectories.
-Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}
+Dir[Rails.root.join("spec/support/**/*.rb")].each { |f| require f }
 WebMock.disable_net_connect!(allow_localhost: true)

spec/support/capybara.rb

+require 'capybara/rails'
+require 'capybara/rspec'
+require 'capybara/poltergeist'
+
+# Give CI some extra time
+timeout = (ENV['CI'] || ENV['CI_SERVER']) ? 90 : 10
+
+Capybara.javascript_driver = :poltergeist
+Capybara.register_driver :poltergeist do |app|
+  Capybara::Poltergeist::Driver.new(app, js_errors: false, timeout: timeout)
+end
+
+Capybara.default_wait_time = timeout
+Capybara.ignore_hidden_elements = true
+
+require 'capybara-screenshot/rspec'
+
+# Keep only the screenshots generated from the last failing test suite
+Capybara::Screenshot.prune_strategy = :keep_last_run