Feature: SignIn with Twitter (#479)

* Add Twitter SignIn flow

Co-authored-by: Sojan Jose <sojan@pepalo.com>

spec/services/twitter/webhook_subscribe_service_spec.rb

@@ -0,0 +1,36 @@
+require 'rails_helper'
+
+describe ::Twitter::WebhookSubscribeService do
+  subject(:webhook_subscribe_service) { described_class.new(inbox_id: twitter_inbox.id) }
+
+  let(:twitter_client) { instance_double(::Twitty::Facade) }
+  let(:twitter_success_response) { instance_double(::Twitty::Response, status: '200', body: { message: 'Valid' }) }
+  let(:twitter_error_response) { instance_double(::Twitty::Response, status: '422', body: { message: 'Invalid request' }) }
+  let(:account) { create(:account) }
+  let(:twitter_channel) { create(:channel_twitter_profile, account: account) }
+  let(:twitter_inbox) { create(:inbox, channel: twitter_channel, account: account) }
+
+  before do
+    allow(::Twitty::Facade).to receive(:new).and_return(twitter_client)
+    allow(twitter_client).to receive(:register_webhook)
+    allow(twitter_client).to receive(:subscribe_webhook)
+  end
+
+  describe '#perform' do
+    context 'with successful registration' do
+      it 'calls subscribe webhook' do
+        allow(twitter_client).to receive(:register_webhook).and_return(twitter_success_response)
+        webhook_subscribe_service.perform
+        expect(twitter_client).to have_received(:subscribe_webhook)
+      end
+    end
+
+    context 'with unsuccessful registration' do
+      it 'does not call subscribe webhook' do
+        allow(twitter_client).to receive(:register_webhook).and_return(twitter_error_response)
+        webhook_subscribe_service.perform
+        expect(twitter_client).not_to have_received(:subscribe_webhook)
+      end
+    end
+  end
+end