Implement track/index action for API

spec/integration/api/tracks_spec.rb

@@ -0,0 +1,28 @@
+require 'spec_helper'
+
+feature 'API tracks' do
+  include UserIntegrationHelpers
+
+  background do
+    api_sign_in
+  end
+
+  scenario 'lists tracks' do
+    track_1 = Factory.create(:track_with_sound, :name => 'Track 1')
+    track_2 = Factory.create(:track, :name => 'Track 2')
+
+    get api_tracks_path, :format => :json
+
+    response.body.should == [
+      {
+        :id => track_1.id,
+        :name => 'Track 1',
+        :sound_url => api_sound_url(track_1.sound)
+      },
+      {
+        :id => track_2.id,
+        :name => 'Track 2'
+      }
+    ].to_json
+  end
+end