Add basic playlists management

* Index of playlists
* Create a new playlist
* Basic playlist model with mandatory name

app/controllers/playlists_controller.rb

@@ -0,0 +1,18 @@
+class PlaylistsController < ApplicationController
+  def index
+    @playlists = Playlist.all
+  end
+
+  def new
+    @playlist = Playlist.new
+  end
+
+  def create
+    @playlist = Playlist.new params[:playlist]
+    if @playlist.save
+      redirect_to :action => 'index'
+    else
+      render :action => 'new'
+    end
+  end
+end

app/models/playlist.rb

@@ -0,0 +1,3 @@
+class Playlist < ActiveRecord::Base
+  validates_presence_of :name
+end

app/views/playlists/index.html.haml

@@ -0,0 +1,4 @@
+= link_to 'Create playlist', new_playlist_path
+%ul
+  - @playlists.each do |p|
+    %li= p.name

app/views/playlists/new.html.haml

@@ -0,0 +1,4 @@
+= form_for @playlist do |f|
+  = f.label :name
+  = f.text_field :name
+  = f.submit 'Create'

config/routes.rb

@@ -1,58 +1,3 @@
 Scube::Application.routes.draw do
-  # The priority is based upon order of creation:
+  resources :playlists
-  # first created -> highest priority.
-
-  # Sample of regular route:
-  #   match 'products/:id' => 'catalog#view'
-  # Keep in mind you can assign values other than :controller and :action
-
-  # Sample of named route:
-  #   match 'products/:id/purchase' => 'catalog#purchase', :as => :purchase
-  # This route can be invoked with purchase_url(:id => product.id)
-
-  # Sample resource route (maps HTTP verbs to controller actions automatically):
-  #   resources :products
-
-  # Sample resource route with options:
-  #   resources :products do
-  #     member do
-  #       get 'short'
-  #       post 'toggle'
-  #     end
-  #
-  #     collection do
-  #       get 'sold'
-  #     end
-  #   end
-
-  # Sample resource route with sub-resources:
-  #   resources :products do
-  #     resources :comments, :sales
-  #     resource :seller
-  #   end
-
-  # Sample resource route with more complex sub-resources
-  #   resources :products do
-  #     resources :comments
-  #     resources :sales do
-  #       get 'recent', :on => :collection
-  #     end
-  #   end
-
-  # Sample resource route within a namespace:
-  #   namespace :admin do
-  #     # Directs /admin/products/* to Admin::ProductsController
-  #     # (app/controllers/admin/products_controller.rb)
-  #     resources :products
-  #   end
-
-  # You can have the root of your site routed with "root"
-  # just remember to delete public/index.html.
-  # root :to => "welcome#index"
-
-  # See how all your routes lay out with "rake routes"
-
-  # This is a legacy wild controller route that's not recommended for RESTful applications.
-  # Note: This route will make all actions in every controller accessible via GET requests.
-  # match ':controller(/:action(/:id(.:format)))'
 end

db/migrate/20110711195337_create_playlists.rb

@@ -0,0 +1,13 @@
+class CreatePlaylists < ActiveRecord::Migration
+  def self.up
+    create_table :playlists do |t|
+      t.string :name
+
+      t.timestamps
+    end
+  end
+
+  def self.down
+    drop_table :playlists
+  end
+end

db/schema.rb

@@ -10,6 +10,12 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 0) do
+ActiveRecord::Schema.define(:version => 20110711195337) do
+
+  create_table "playlists", :force => true do |t|
+    t.string   "name"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
 
 end

features/playlists.feature

@@ -0,0 +1,18 @@
+Feature: Playlists
+
+  So that tracks can be grouped in lists
+  As a listener
+  I want to manage some playlists
+
+  Scenario: List playlists
+    Given Foo and Bar playlists
+    When I am on the playlists page
+    Then I should see "Foo" within "ul>li"
+    And I should see "Bar" within "ul>li+li"
+
+  Scenario: Create playlist
+    Given I am on the playlists page
+    When I follow "Create playlist"
+    And I fill in "Name" with "Electro"
+    And I press "Create"
+    Then I should see "Electro" within "ul>li"

features/step_definitions/playlists_step.rb

@@ -0,0 +1,4 @@
+Given /^Foo and Bar playlists$/ do
+  @foo = Playlist.create!(:name => 'Foo')
+  @bar = Playlist.create!(:name => 'Bar')
+end

spec/controllers/playlists_controller_spec.rb

@@ -0,0 +1,67 @@
+require 'spec_helper'
+
+describe PlaylistsController do
+  def valid_attributes
+    {
+      :name => 'Electro'
+    }
+  end
+
+  describe "GET index" do
+    it 'assigns all playlists as @playlists' do
+      playlist = Playlist.create! valid_attributes
+      get :index
+      assigns[:playlists].should == [playlist]
+    end
+  end
+
+  describe "GET new" do
+    it 'assigns a new playlist as @playlist' do
+      get :new
+      assigns[:playlist].should be_a_new(Playlist)
+    end
+  end
+
+  describe "POST create" do
+    let(:playlist) { mock_model(Playlist).as_null_object }
+
+    before do
+      Playlist.stub(:new).and_return(playlist)
+    end
+
+    it 'creates a new playlist' do
+      Playlist.should_receive(:new).
+        with('name' => 'Electro').
+        and_return(playlist)
+      post :create, :playlist => { 'name' => 'Electro' }
+    end
+
+    it 'saves the playlist' do
+      playlist.should_receive(:save)
+      post :create
+    end
+
+    context 'when the playlist saves successfully' do
+      it 'redirects to the playlists index' do
+        post :create
+        response.should redirect_to(:action => 'index')
+      end
+    end
+
+    context 'when the playlist fails to save' do
+      before do
+        playlist.stub(:save).and_return(false)
+      end
+
+      it 'assigns the playlist as @playlist' do
+        post :create
+        assigns[:playlist].should eq(playlist)
+      end
+
+      it 'renders the new template' do
+        post :create
+        response.should render_template('new')
+      end
+    end
+  end
+end

spec/models/playlist_spec.rb

@@ -0,0 +1,18 @@
+require 'spec_helper'
+
+describe Playlist do
+  subject { playlist }
+  let(:playlist) { Playlist.new :name => 'Electro' }
+
+  context "with valid attributes" do
+    it { should be_valid }
+  end
+
+  context "when name empty" do
+    before do
+      playlist.name = ''
+    end
+
+    it { should_not be_valid }
+  end
+end

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

@@ -0,0 +1,22 @@
+require 'spec_helper'
+
+describe 'playlists/index.html.haml' do
+  before do
+    assign :playlists, [
+      double('Playlist', :name => 'Foo'),
+      double('Playlist', :name => 'Bar')
+    ]
+  end
+
+  it 'displays a list of playlists' do
+    render
+    rendered.should have_selector('ul>li', :count => 2)
+    rendered.should have_selector('ul>li', :text => 'Foo')
+    rendered.should have_selector('ul>li+li', :text => 'Bar')
+  end
+
+  it 'displays a link to create a new playlist' do
+    render
+    rendered.should have_selector('a', :text => 'Create playlist')
+  end
+end

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

@@ -0,0 +1,26 @@
+require 'spec_helper'
+
+describe 'playlists/new.html.haml' do
+  let(:playlist) do
+    mock_model('Playlist').as_new_record.as_null_object
+  end
+
+  before do
+    assign :playlist, playlist
+  end
+
+  it 'renders a form to create a playlist' do
+    render
+    rendered.should have_selector("form[method=post][action='#{playlists_path}']")
+    rendered.should have_selector('input[type=submit]')
+  end
+
+  it 'renders a text field with a label for the playlists name' do
+    playlist.stub(:name => 'Electro')
+    render
+    rendered.should \
+      have_selector("input[type=text][name='playlist[name]'][value=Electro]")
+    rendered.should \
+      have_selector("label[for=playlist_name]", :text => 'Name')
+  end
+end