Make all spec work, switch to thoughtbot way of integration testing

spec/features/suppliers/product_categories_spec.rb

@@ -0,0 +1,20 @@
+require 'spec_helper'
+feature 'Supplier product categories spec', %q{
+  In order to manage product categories 
+  As a confirmed supplier
+  I want to have control over product categories and associated products
+} do
+  background do
+    create_confirmed_supplier 'supplier@qwaiter.com'
+  end
+  context "GET #index" do
+    background do
+      @product_category = create :product_category, supplier: @supplier
+    end
+    scenario "I can see a drag handle having class .handle for sorting the product categories" do
+      login_supplier_as 'supplier@qwaiter.com'
+      visit '/supplier/product_categories'
+      page.should have_selector '.handle'
+    end
+  end
+end