Display tax in cart

app/views/spree/orders/_form.html.haml

@@ -56,3 +56,9 @@
           %td.text-right
             %h5.order-total.grand-total= @order.display_total
           %td
+
+        %tr
+          %td.text-right{colspan:"3"} (includes tax)
+          %td.text-right
+            %span.order-total.tax-total= display_checkout_tax_total(@order)
+          %td

spec/features/consumer/shopping/cart_spec.rb

@@ -0,0 +1,32 @@
+require 'spec_helper'
+
+feature "full-page cart", js: true do
+  include AuthenticationWorkflow
+  include WebHelper
+  include ShopWorkflow
+  include UIComponentHelper
+
+  describe "viewing the cart" do
+    describe "tax" do
+      let!(:zone) { create(:zone_with_member) }
+      let(:distributor) { create(:distributor_enterprise, with_payment_and_shipping: true) }
+      let(:supplier) { create(:supplier_enterprise) }
+      let!(:order_cycle) { create(:simple_order_cycle, suppliers: [supplier], distributors: [distributor], coordinator: create(:distributor_enterprise), variants: [product.master]) }
+      let(:enterprise_fee) { create(:enterprise_fee, amount: 11.00, tax_category: product.tax_category) }
+      let(:product) { create(:taxed_product, supplier: supplier, zone: zone, price: 110.00, tax_rate_amount: 0.1) }
+      let(:order) { create(:order, order_cycle: order_cycle, distributor: distributor) }
+
+      before do
+        add_enterprise_fee enterprise_fee
+        set_order order
+        add_product_to_cart
+        visit spree.cart_path
+      end
+
+      it "shows the total tax for the order, including product tax and tax on fees" do
+        save_screenshot '/home/rohan/ss.png', full: true
+        page.should have_selector '.tax-total', text: '11.00' # 10 + 1
+      end
+    end
+  end
+end