Feat: detect language of the message content (#6660)

spec/lib/integrations/google_translate/detect_language_service_spec.rb

@@ -0,0 +1,44 @@
+require 'rails_helper'
+require 'google/cloud/translate/v3'
+
+describe Integrations::GoogleTranslate::DetectLanguageService do
+  let(:account) { create(:account) }
+  let(:message) { create(:message, account: account, content: 'muchas muchas gracias') }
+  let(:hook) { create(:integrations_hook, :google_translate, account: account) }
+  let(:translate_client) { double }
+
+  before do
+    allow(::Google::Cloud::Translate).to receive(:translation_service).and_return(translate_client)
+    allow(translate_client).to receive(:detect_language).and_return(::Google::Cloud::Translate::V3::DetectLanguageResponse
+      .new({ languages: [{ language_code: 'es', confidence: 0.71875 }] }))
+  end
+
+  describe '#perform' do
+    it 'detects and updates the conversation language' do
+      described_class.new(hook: hook, message: message).perform
+      expect(translate_client).to have_received(:detect_language)
+      expect(message.conversation.reload.additional_attributes['conversation_language']).to eq('es')
+    end
+
+    it 'will not update the conversation language if it is already present' do
+      message.conversation.update!(additional_attributes: { conversation_language: 'en' })
+      described_class.new(hook: hook, message: message).perform
+      expect(translate_client).not_to have_received(:detect_language)
+      expect(message.conversation.reload.additional_attributes['conversation_language']).to eq('en')
+    end
+
+    it 'will not update the conversation language if the message is not incoming' do
+      message.update!(message_type: :outgoing)
+      described_class.new(hook: hook, message: message).perform
+      expect(translate_client).not_to have_received(:detect_language)
+      expect(message.conversation.reload.additional_attributes['conversation_language']).to be_nil
+    end
+
+    it 'will not execute if the message content is blank' do
+      message.update!(content: nil)
+      described_class.new(hook: hook, message: message).perform
+      expect(translate_client).not_to have_received(:detect_language)
+      expect(message.conversation.reload.additional_attributes['conversation_language']).to be_nil
+    end
+  end
+end