Feature #1257 Warenkorb wird angezeigt, auch wenn er leer ist

app/controllers/carts_controller.rb

@@ -3,11 +3,11 @@ class CartsController < ApplicationController
 
   before_filter :generate_session, only: :edit
   before_filter :clear_session, only: :show # userhas the possibility to reset the session by continue buying
-  before_filter :set_cart
+  before_filter :set_cart, except: :empty_cart
   before_filter :dont_cache, only: [:edit, :update]
 
   before_filter :authorize_and_authenticate_user_on_cart, only: :show
-  skip_before_filter :authenticate_user!, only: :show
+  skip_before_filter :authenticate_user!, only: [:show, :empty_cart]
 
 
   def show
@@ -65,6 +65,11 @@ def update
     end
   end
 
+  def empty_cart
+    authorize Cart.new
+    render :empty_cart
+  end
+
   private
 
     def generate_session

app/policies/cart_policy.rb

@@ -34,4 +34,8 @@ def update?
     user == cart.user
   end
 
+  def empty_cart? cookie_id = nil
+    (!user && !cookie_id) || (user && !user.carts.open.any?)
+  end
+
 end

app/views/carts/empty_cart.html.slim

@@ -0,0 +1,4 @@
+h2
+  =t('cart.heading')
+.Content
+  = t('cart.texts.empty_cart')

app/views/layouts/partials/_header_nav.html.slim

@@ -34,3 +34,6 @@
         /     - current_cart.line_items.each do |line_item|
         /       = render "layouts/partials/header_nav_cart_item", line_item: line_item
         /     = link_to t('header.cart.button'), current_cart, class: 'Button'
+    - else
+      li
+        = link_to t('header.cart.title', count: 0), empty_cart_path, data: navigation_push

config/routes.rb

@@ -83,7 +83,9 @@
     end
   end
 
-  resources :carts, only: [:show,:edit,:update]
+  resources :carts, only: [:show, :edit, :update]
+
+  match '/empty_cart', to: 'carts#empty_cart', as: 'empty_cart', via: :get
 
   resources :line_items, only: [:create,:update,:destroy]
 
@@ -98,7 +100,7 @@
   resources :business_transactions, only: [:show] do
     resources :refunds, only: [ :new, :create ]
   end
-  match '/transactions/set_transport_ready/:id', to: 'business_transactions#set_transport_ready', as: 'set_transport_ready', via: [:get, :pos]
+  match '/transactions/set_transport_ready/:id', to: 'business_transactions#set_transport_ready', as: 'set_transport_ready', via: [:get, :post]
 
   get 'welcome/reconfirm_terms'
   post 'welcome/reconfirm_terms'

test/controllers/carts_controller_test.rb

@@ -0,0 +1,9 @@
+require_relative '../test_helper'
+
+describe CartsController do
+  it 'should render empty cart template when user has no cart' do
+    get :empty_cart
+    assert_response :success
+    assert_template :empty_cart
+  end
+end

test/features/cart_test.rb

@@ -8,6 +8,15 @@ def expect_cart_emails arg= :once
   CartMailer.expects(:buyer_email).returns(Mail::Message.new)
 end
 
+feature 'Empty cart' do
+  it 'header should show link to empty cart' do
+    visit root_path
+    page.html.must_include I18n.t('header.cart.title', count: 0)
+    click_link(I18n.t('header.cart.title', count: 0), match: :first)
+    page.must_have_content 'Dein Warenkorb ist leer.'
+  end
+end
+
 feature 'Adding an Article to the cart' do
 
   scenario 'anonymous user adds article to his cart' do

test/policies/cart_policy_test.rb

@@ -11,19 +11,22 @@
     it { subject.must_deny(:show)   }
     it { subject.must_deny(:edit)   }
     it { subject.must_deny(:update) }
+    it { subject.must_permit(:empty_cart) }
   end
 
   describe "for a random logged-in user" do
     let(:user) { FactoryGirl.create :user }
     it { subject.must_deny(:show)   }
     it { subject.must_deny(:edit)   }
     it { subject.must_deny(:update) }
+    it { subject.must_permit(:empty_cart) }
   end
 
   describe "for the owning user" do
     let(:user) { cart.user }
     it { subject.must_permit(:show)   }
     it { subject.must_permit(:edit)   }
     it { subject.must_permit(:update) }
+    it { subject.must_deny(:empty_cart) }
   end
 end