Implement tracks/show in AP

app/controllers/api/tracks_controller.rb

@@ -3,5 +3,9 @@ module API
     def index
       @tracks = Track.all
     end
+
+    def show
+      @track = Track.find(params[:id])
+    end
   end
 end

app/views/api/tracks/show.rabl

@@ -0,0 +1,4 @@
+object @track
+
+attribute :id
+attribute :name

config/routes.rb

@@ -7,7 +7,7 @@ Rails.application.routes.draw do
     resources :playlists, only: %i[index show create]
     resources :sessions, only: :create
     resources :sounds, only: :show
-    resources :tracks, only: :index
+    resources :tracks, only: %i[index show]
     match '*all', to: 'application#not_found', via: :all
   end
 

spec/integration/api/tracks_spec.rb

@@ -20,4 +20,14 @@ describe 'API tracks' do
       }
     ]
   end
+
+  it 'shows a track' do
+    track = create :track
+    get api_track_path track, format: :json
+
+    expect(json).to match(
+      id:   track.id,
+      name: track.name
+    )
+  end
 end