feat: Instagram reauthorization (#11221)

This PR is part of https://github.com/chatwoot/chatwoot/pull/11054 to
make the review cycle easier.

spec/models/channel/instagram_spec.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'rails_helper'
+require Rails.root.join 'spec/models/concerns/reauthorizable_shared.rb'
 
 RSpec.describe Channel::Instagram do
   let(:channel) { create(:channel_instagram) }
@@ -14,4 +15,21 @@ RSpec.describe Channel::Instagram do
   it 'has a valid name' do
     expect(channel.name).to eq('Instagram')
   end
+
+  describe 'concerns' do
+    it_behaves_like 'reauthorizable'
+
+    context 'when prompt_reauthorization!' do
+      it 'calls channel notifier mail for instagram' do
+        admin_mailer = double
+        mailer_double = double
+
+        expect(AdministratorNotifications::ChannelNotificationsMailer).to receive(:with).and_return(admin_mailer)
+        expect(admin_mailer).to receive(:instagram_disconnect).with(channel.inbox).and_return(mailer_double)
+        expect(mailer_double).to receive(:deliver_later)
+
+        channel.prompt_reauthorization!
+      end
+    end
+  end
 end