use active job test queue adapter in rspec

config/environments/test.rb

@@ -44,6 +44,7 @@ Rails.application.configure do
   # The :test delivery method accumulates sent emails in the
   # ActionMailer::Base.deliveries array.
   config.action_mailer.delivery_method = :test
+  config.active_job.queue_adapter = :test
 
   # Print deprecation notices to the stderr.
   config.active_support.deprecation = :stderr

spec/rails_helper.rb

@@ -47,6 +47,7 @@ RSpec.configure do |config|
 
   config.include FactoryBot::Syntax::Methods
   config.include Devise::Test::IntegrationHelpers
+  config.include ActiveJob::TestHelper
 
   config.before(:each, type: :system) do
     if ENV['HEADLESS'] == 'false'

spec/system/submit_form_spec.rb

@@ -81,15 +81,7 @@ RSpec.describe 'Submit Form' do
 
       expect do
         click_on 'Submit'
-      end.to change { ActionMailer::Base.deliveries.size }.by(1)
-
-      email = ActionMailer::Base.deliveries.last
-
-      expect(email.subject).to eq("#{submitter.email} has completed the \"#{template.name}\" form")
-
-      expect(email.body.encoded).to include "Hi #{user.first_name},"
-      expect(email.body.encoded).to include "#{submitter.email} has completed the \"#{template.name}\" form."
-      expect(email.body.encoded).to have_link('View Submission')
+      end.to change(enqueued_jobs, :size).by(3)
     end
   end
 end