Chore: Routine Bugfixes and enhancements (#979)

- Fix slack scopes
- Docs for authentication
Fixes: #704 , #973

spec/services/facebook/send_on_facebook_service_spec.rb

@@ -0,0 +1,60 @@
+require 'rails_helper'
+
+describe Facebook::SendOnFacebookService do
+  subject(:send_reply_service) { described_class.new(message: message) }
+
+  before do
+    allow(Facebook::Messenger::Subscriptions).to receive(:subscribe).and_return(true)
+    allow(bot).to receive(:deliver)
+  end
+
+  let!(:account) { create(:account) }
+  let(:bot) { class_double('FacebookBot::Bot').as_stubbed_const }
+  let!(:widget_inbox) { create(:inbox, account: account) }
+  let!(:facebook_channel) { create(:channel_facebook_page, account: account) }
+  let!(:facebook_inbox) { create(:inbox, channel: facebook_channel, account: account) }
+  let!(:contact) { create(:contact, account: account) }
+  let(:contact_inbox) { create(:contact_inbox, contact: contact, inbox: facebook_inbox) }
+  let(:conversation) { create(:conversation, contact: contact, inbox: facebook_inbox, contact_inbox: contact_inbox) }
+
+  describe '#perform' do
+    context 'without reply' do
+      it 'if message is private' do
+        create(:message, message_type: 'outgoing', private: true, inbox: facebook_inbox, account: account)
+        expect(bot).not_to have_received(:deliver)
+      end
+
+      it 'if inbox channel is not facebook page' do
+        create(:message, message_type: 'outgoing', inbox: widget_inbox, account: account)
+        expect(bot).not_to have_received(:deliver)
+      end
+
+      it 'if message is not outgoing' do
+        create(:message, message_type: 'incoming', inbox: facebook_inbox, account: account)
+        expect(bot).not_to have_received(:deliver)
+      end
+
+      it 'if message has an FB ID' do
+        create(:message, message_type: 'outgoing', inbox: facebook_inbox, account: account, source_id: SecureRandom.uuid)
+        expect(bot).not_to have_received(:deliver)
+      end
+    end
+
+    context 'with reply' do
+      it 'if message is sent from chatwoot and is outgoing' do
+        create(:message, message_type: :incoming, inbox: facebook_inbox, account: account, conversation: conversation)
+        create(:message, message_type: 'outgoing', inbox: facebook_inbox, account: account, conversation: conversation)
+        expect(bot).to have_received(:deliver)
+      end
+
+      it 'if message with attachment is sent from chatwoot and is outgoing' do
+        create(:message, message_type: :incoming, inbox: facebook_inbox, account: account, conversation: conversation)
+        message = build(:message, message_type: 'outgoing', inbox: facebook_inbox, account: account, conversation: conversation)
+        attachment = message.attachments.new(account_id: message.account_id, file_type: :image)
+        attachment.file.attach(io: File.open(Rails.root.join('spec/assets/avatar.png')), filename: 'avatar.png', content_type: 'image/png')
+        message.save!
+        expect(bot).to have_received(:deliver)
+      end
+    end
+  end
+end