feat: Add APIs for Campaigns (#2175)

spec/models/campaign_spec.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Campaign, type: :model do
+  describe 'associations' do
+    it { is_expected.to belong_to(:account) }
+    it { is_expected.to belong_to(:inbox) }
+  end
+
+  describe '.before_create' do
+    let(:campaign) { build(:campaign, display_id: nil) }
+
+    before do
+      campaign.save
+      campaign.reload
+    end
+
+    it 'runs before_create callbacks' do
+      expect(campaign.display_id).to eq(1)
+    end
+  end
+end

spec/models/conversation_spec.rb

@@ -7,6 +7,7 @@ require Rails.root.join 'spec/models/concerns/round_robin_handler_spec.rb'
 RSpec.describe Conversation, type: :model do
   describe 'associations' do
     it { is_expected.to belong_to(:account) }
+    it { is_expected.to belong_to(:inbox) }
   end
 
   describe 'concerns' do