chore: one off SMS campaign APIs (#2589)

spec/services/twilio/oneoff_sms_campaign_service_spec.rb

@@ -0,0 +1,52 @@
+require 'rails_helper'
+
+describe Twilio::OneoffSmsCampaignService do
+  subject(:sms_campaign_service) { described_class.new(campaign: campaign) }
+
+  let(:account) { create(:account) }
+  let!(:twilio_sms) { create(:channel_twilio_sms) }
+  let!(:twilio_inbox) { create(:inbox, channel: twilio_sms) }
+  let(:label1) { create(:label, account: account) }
+  let(:label2) { create(:label, account: account) }
+  let!(:campaign) do
+    create(:campaign, inbox: twilio_inbox, account: account,
+                      audience: [{ type: 'Label', id: label1.id }, { type: 'Label', id: label2.id }])
+  end
+  let(:twilio_client) { double }
+  let(:twilio_messages) { double }
+
+  describe 'perform' do
+    before do
+      allow(::Twilio::REST::Client).to receive(:new).and_return(twilio_client)
+      allow(twilio_client).to receive(:messages).and_return(twilio_messages)
+    end
+
+    it 'raises error if the campaign is completed' do
+      campaign.completed!
+
+      expect { sms_campaign_service.perform }.to raise_error 'Completed Campaign'
+    end
+
+    it 'raises error invalid campaign when its not a oneoff sms campaign' do
+      campaign = create(:campaign)
+
+      expect { described_class.new(campaign: campaign).perform }.to raise_error "Invalid campaign #{campaign.id}"
+    end
+
+    it 'send messages to contacts in the audience and marks the campaign completed' do
+      contact_with_label1, contact_with_label2, contact_with_both_labels = FactoryBot.create_list(:contact, 3, account: account)
+      contact_with_label1.update_labels([label1.title])
+      contact_with_label2.update_labels([label2.title])
+      contact_with_both_labels.update_labels([label1.title, label2.title])
+      expect(twilio_messages).to receive(:create).with(body: campaign.message,
+                                                       from: twilio_sms.phone_number, to: contact_with_label1.phone_number).once
+      expect(twilio_messages).to receive(:create).with(body: campaign.message,
+                                                       from: twilio_sms.phone_number, to: contact_with_label2.phone_number).once
+      expect(twilio_messages).to receive(:create).with(body: campaign.message,
+                                                       from: twilio_sms.phone_number, to: contact_with_both_labels.phone_number).once
+
+      sms_campaign_service.perform
+      expect(campaign.reload.completed?).to eq true
+    end
+  end
+end