Implement ping/pong endpoint in API

app/controllers/api/application_controller.rb

@@ -21,6 +21,10 @@ module API
       head :ok
     end
 
+    def ping
+      render json: { pong: 'ok' }
+    end
+
     def authenticate!
       head :unauthorized if current_user.nil?
     end

config/routes.rb

@@ -2,6 +2,7 @@ Rails.application.routes.draw do
   root 'home#index'
 
   namespace :api do
+    get '/ping' => 'application#ping'
     resources :sounds, only: [:show]
     resources :tracks, only: [:index]
     resources :playlists, only: [:index, :create]

spec/integration/api/application_spec.rb

@@ -0,0 +1,13 @@
+describe 'API application' do
+  include AcceptanceHelpers
+
+  before { api_sign_in }
+
+  describe 'ping endpoint' do
+    before { get api_ping_path, format: json }
+
+    it 'responds with a pong' do
+      expect(json).to eq({ pong: 'ok' })
+    end
+  end
+end