Extracted MoneySplitter to its own file

Author: andrzejkrzywda

rails_application/.mutant.yml

@@ -45,7 +45,7 @@ matcher:
     - Processes::OrderConfirmation#stream_name
     - Processes::Test*
     - Processes::ReleasePaymentProcess*
-    - Processes::MoneySplitter*
+    - Processes::Invoices::MoneySplitter*
     - Processes::SyncShipmentFromPricing*
     - Processes::SyncInventoryFromOrdering*
     - Processes::NotifyPaymentsAboutOrderValue*

rails_application/app/processes/processes/invoice_generation.rb

@@ -1,3 +1,5 @@
+require_relative 'invoices/money_splitter'
+
 module Processes
   class InvoiceGeneration
     include Infra::ProcessManager.with_state { Invoice }
@@ -58,7 +60,7 @@ def apply(event)
 
     def create_invoice_items_for_product(product_id, quantity, discounted_amount)
       vat_rate = @vat_rate_catalog.vat_rate_for(product_id)
-      unit_prices = MoneySplitter.new(discounted_amount, quantity).call
+      unit_prices = Invoices::MoneySplitter.new(discounted_amount, quantity).call
       unit_prices.tally.each do |unit_price, quantity|
         command_bus.call(
           Invoicing::AddInvoiceItem.new(
@@ -152,30 +154,4 @@ def discounted_value
     end
   end
 
-  class MoneySplitter
-    def initialize(amount, quantity)
-      @amount = amount
-      @weights = Array.new(quantity, 1)
-    end
-
-    def call
-      distributed_amounts = []
-      total_weight = @weights.sum.to_d
-      @weights.each do |weight|
-        if total_weight.eql?(0)
-          distributed_amounts << 0
-          next
-        end
-
-        p = weight / total_weight
-        distributed_amount = (p * @amount).round(2)
-        distributed_amounts << distributed_amount
-        total_weight -= weight
-        @amount -= distributed_amount
-      end
-
-      distributed_amounts
-    end
-  end
-
 end

rails_application/app/processes/processes/invoices/money_splitter.rb

@@ -0,0 +1,29 @@
+module Processes
+  module Invoices
+    class MoneySplitter
+      def initialize(amount, quantity)
+        @amount = amount
+        @weights = Array.new(quantity, 1)
+      end
+
+      def call
+        distributed_amounts = []
+        total_weight = @weights.sum.to_d
+        @weights.each do |weight|
+          if total_weight.eql?(0)
+            distributed_amounts << 0
+            next
+          end
+
+          p = weight / total_weight
+          distributed_amount = (p * @amount).round(2)
+          distributed_amounts << distributed_amount
+          total_weight -= weight
+          @amount -= distributed_amount
+        end
+
+        distributed_amounts
+      end
+    end
+  end
+end

rails_application/test/processes/money_splitter_test.rb

@@ -1,13 +1,16 @@
 require "test_helper"
 
 module Processes
-  class MoneySplitterTest < Minitest::Test
-    cover "Processes::MoneySplitter"
+  module Invoices
+    class MoneySplitterTest < Minitest::Test
+      cover "Processes::Invoicing::MoneySplitter"
 
-    def test_splitting_money_without_losing_cents
-      assert_equal([0.01, 0.01, 0.01], MoneySplitter.new(0.03, 3).call)
-      assert_equal([0.01, 0.02], MoneySplitter.new(0.03, 2).call.sort)
-      assert_equal([0, 0, 0.01, 0.01, 0.01], MoneySplitter.new(0.03, 5).call.sort)
+      def test_splitting_money_without_losing_cents
+        assert_equal([0.01, 0.01, 0.01], MoneySplitter.new(0.03, 3).call)
+        assert_equal([0.01, 0.02], MoneySplitter.new(0.03, 2).call.sort)
+        assert_equal([0, 0, 0.01, 0.01, 0.01], MoneySplitter.new(0.03, 5).call.sort)
+      end
     end
   end
-end
+end
+