add builder 'replace' button specs

spec/rails_helper.rb

@@ -11,6 +11,7 @@ require 'capybara/rspec'
 require 'webmock/rspec'
 require 'sidekiq/testing'
 require 'signing_form_helper'
+require 'request_helper'
 
 Sidekiq::Testing.fake!
 
@@ -54,6 +55,7 @@ RSpec.configure do |config|
   config.include FactoryBot::Syntax::Methods
   config.include Devise::Test::IntegrationHelpers
   config.include SigningFormHelper
+  config.include RequestHelper
 
   config.before(:each, type: :system) do
     if ENV['HEADLESS'] == 'false'