Add track/{new,create} with file upload for the track

spec/controllers/tracks_controller_spec.rb

@@ -14,4 +14,58 @@ describe TracksController do
       assigns[:track].should == track
     end
   end
+
+  describe 'GET new' do
+    it 'assigns a new track as @track' do
+      get :new
+      assigns[:track].should be_a_new(Track)
+    end
+  end
+
+  describe 'POST create' do
+    let(:track) { mock_model(Track).as_null_object }
+    before { Track.stub(:new).and_return(track) }
+
+    it 'creates a new track' do
+      Track.should_receive(:new).
+        with(:name => 'Mega song').
+        and_return(track)
+      post :create, :track => valid_attributes
+    end
+
+    it 'saves the track' do
+      track.should_receive(:save)
+      post :create, :track => {}
+    end
+
+    it 'saves the file uploaded for the track' do
+      file = mock(Rack::Test::UploadedFile)
+      track.should_receive(:uploaded_file=).with(file)
+      post :create, :track => { :file => file }
+    end
+
+    context 'when the track saves successfully' do
+      it 'redirects to the track page' do
+        post :create, :track => valid_attributes
+        response.should redirect_to(track)
+      end
+    end
+
+    context 'when the track fails to save' do
+      before do
+        track.stub(:save).and_return(false)
+      end
+
+      it 'assigns the track as @track' do
+        post :create, :track => {}
+        assigns[:track].should == track
+      end
+
+      it 'renders the new template' do
+        post :create, :track => {}
+        response.should render_template('new')
+      end
+    end
+
+  end
 end

spec/models/track_spec.rb

@@ -15,4 +15,24 @@ describe Track do
 
     it { should_not be_valid }
   end
+
+  describe '#uploaded_file=' do
+    let(:track) { Track.new :name => 'Mega song' }
+
+    it 'saves an uploaded file' do
+      filepath = "#{Rails.root}/spec/fixtures/test.mp3"
+      file = mock(Rack::Test::UploadedFile)
+      file.stub(
+        :tempfile     => File.new(filepath),
+        :content_type => 'audio/mpeg'
+      )
+      track.uploaded_file = file
+      track.save
+      File.read("#{Rails.root}/data/tracks/#{track.id.to_s}").should == File.read(filepath)
+    end
+
+    after do
+      `rm -rf #{Rails.root}/data/tracks/*`
+    end
+  end
 end

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

@@ -21,4 +21,9 @@ describe 'playlists/index.html.haml' do
     render
     rendered.should have_selector('a', :text => 'Electro')
   end
+
+  it 'displays a link to create a new track' do
+    render
+    rendered.should have_selector('a', :text => 'Add a track')
+  end
 end

spec/views/tracks/new.html.haml_spec.rb

@@ -0,0 +1,35 @@
+require 'spec_helper'
+
+describe 'tracks/new.html.haml' do
+  let(:track) do
+    mock_model('Track').as_new_record.as_null_object
+  end
+
+  before do
+    assign :track, track
+  end
+
+  it 'renders a form to create a track' do
+    render
+    rendered.should have_selector("form[method=post][action='#{tracks_path}']")
+    rendered.should have_selector('input[type=submit]')
+  end
+
+  it 'renders a text field with a label for the playlists name' do
+    track.stub(:name => 'Mega song')
+    render
+    rendered.should \
+      have_selector("input[type=text][name='track[name]'][value='Mega song']")
+    rendered.should \
+      have_selector('label[for=track_name]', :text => 'Name')
+  end
+
+  it 'renders a file field with a label for the tracks file' do
+    render
+    rendered.should have_selector("form[enctype='multipart/form-data']")
+    rendered.should \
+      have_selector("input[type=file][name='track[file]']")
+    rendered.should \
+      have_selector('label[for=track_file]', :text => 'File')
+  end
+end