chore: one off SMS campaign APIs (#2589)

spec/jobs/trigger_scheduled_items_job_spec.rb

@@ -0,0 +1,24 @@
+require 'rails_helper'
+
+RSpec.describe TriggerScheduledItemsJob, type: :job do
+  subject(:job) { described_class.perform_later }
+
+  let(:account) { create(:account) }
+
+  it 'enqueues the job' do
+    expect { job }.to have_enqueued_job(described_class)
+      .on_queue('scheduled_jobs')
+  end
+
+  context 'when unexecuted Scheduled campaign jobs' do
+    let!(:twilio_sms) { create(:channel_twilio_sms) }
+    let!(:twilio_inbox) { create(:inbox, channel: twilio_sms) }
+
+    it 'triggers Campaigns::TriggerOneoffCampaignJob' do
+      campaign = create(:campaign, inbox: twilio_inbox)
+      create(:campaign, inbox: twilio_inbox, scheduled_at: 10.days.after)
+      expect(Campaigns::TriggerOneoffCampaignJob).to receive(:perform_later).with(campaign).once
+      described_class.perform_now
+    end
+  end
+end