Add test to cover weight calculation bug #3072

spec/features/consumer/shopping/cart_spec.rb

@@ -83,6 +83,33 @@
       end
     end
 
+    describe "admin weight calculated fees" do
+      context 'order with 2 line items' do
+        let(:admin_fee) { create(:enterprise_fee, calculator: Calculator::Weight.new(preferred_per_kg: 1),
+          enterprise: order_cycle.coordinator, fee_type: 'admin') }
+
+        before do
+          product_fee.variants.first.update_attributes(unit_value: '2000.0')
+          product_tax.variants.first.update_attributes(unit_value: '5000.0')
+
+          add_enterprise_fee admin_fee
+
+          cart_service = CartService.new(order)
+          cart_service.populate(variants: { product_fee.variants.first.id => 3, product_tax.variants.first.id => 5 })
+          order.update_distribution_charge!
+
+          visit spree.cart_path
+        end
+
+        it 'shows the correct weight calculations' do
+          expect(page).to have_selector('#cart-detail')
+          expect(page).to have_selector '.cart-item-price',                 text: with_currency(2.86) # price + 1 * 2kg
+          expect(page).to have_selector '.cart-item-price',                 text: with_currency(115.0) # price + 1 * 5kg
+          expect(page).to have_selector '.order-total.grand-total',         text: with_currency(353.58) # above * 3 items
+        end
+      end
+    end
+
     describe "tax" do
       before do
         add_enterprise_fee enterprise_fee