Add latest added tracks list on the home page

spec/controllers/home_controller_spec.rb

@@ -7,5 +7,12 @@ describe HomeController do
       get :index
       assigns[:playlists].should == [playlist]
     end
+
+    it 'assigns latest tracks as @tracks' do
+      track1 = Factory.create(:track, :created_at => '2011-07-27 19:13:42')
+      track2 = Factory.create(:track, :created_at => '2011-07-27 19:58:57')
+      get :index
+      assigns[:tracks].should == Track.latest
+    end
   end
 end

spec/models/track_spec.rb

@@ -56,4 +56,12 @@ describe Track do
       `rm -f #{Rails.root}/data/tracks/*`
     end
   end
+
+  describe '.latest' do
+    it 'returns latest tracks in descending creation date order' do
+      track1 = Factory.create(:track, :created_at => '2011-07-27 19:13:42')
+      track2 = Factory.create(:track, :created_at => '2011-07-27 19:58:57')
+      Track.latest.should == [track2, track1]
+    end
+  end
 end

spec/views/home/index.html.haml_spec.rb

@@ -5,6 +5,9 @@ describe 'home/index.html.haml' do
     assign :playlists, [
       mock_model('Playlist', :name => 'Electro')
     ]
+    assign :tracks, [
+      mock_model('Track', :name => 'Mega song')
+    ]
   end
 
   it 'displays a list of playlists' do
@@ -16,4 +19,9 @@ describe 'home/index.html.haml' do
     render
     rendered.should have_selector('a', :text => 'Add a track')
   end
+
+  it 'displays a list of tracks' do
+    render
+    rendered.should have_selector('ul>li', :text => 'Mega song')
+  end
 end