Extend DiscountChanged event

Author: lukaszreszke

ecommerce/pricing/lib/pricing/events.rb

@@ -70,6 +70,8 @@ class PercentageDiscountChanged < Infra::Event
     attribute :order_id, Infra::Types::UUID
     attribute :type, Infra::Types::String
     attribute :amount, Infra::Types::Price
+    attribute :base_total_value, Infra::Types::Price
+    attribute :total_value, Infra::Types::Price
   end
 
   class ProductMadeFreeForOrder < Infra::Event

ecommerce/pricing/lib/pricing/offer.rb

@@ -68,7 +68,9 @@ def change_discount(discount)
         data: {
           order_id: @id,
           type: discount.type,
-          amount: discount.value
+          amount: discount.value,
+          base_total_value: @list.base_sum,
+          total_value: @list.base_sum - @list.base_sum * (discount.value / 100)
         }
       )
     end

ecommerce/pricing/test/pricing_test.rb

@@ -189,7 +189,9 @@ def test_calculates_total_value_with_discount
           data: {
             order_id: order_id,
             type: Pricing::Discounts::GENERAL_DISCOUNT,
-            amount: 50
+            amount: 50,
+            base_total_value: 20,
+            total_value: 10
           }
         ),
         OrderTotalValueCalculated.new(
@@ -341,7 +343,9 @@ def test_changing_discount_possible_when_discount_is_set
           data: {
             order_id: order_id,
             type: Pricing::Discounts::GENERAL_DISCOUNT,
-            amount: 100
+            amount: 100,
+            base_total_value: 20,
+            total_value: 0
           }
         ),
         OrderTotalValueCalculated.new(
@@ -377,7 +381,9 @@ def test_changing_discount_possible_more_than_once
           data: {
             order_id: order_id,
             type: Pricing::Discounts::GENERAL_DISCOUNT,
-            amount: 100
+            amount: 100,
+            base_total_value: 20,
+            total_value: 0
           }
         ),
         OrderTotalValueCalculated.new(