Cosmetics

app/helpers/checkout_helper.rb

@@ -44,8 +44,11 @@ module CheckoutHelper
   end
 
   def display_checkout_taxes_hash(order)
-    OrderTaxAdjustmentsFetcher.new(order).totals.each_with_object({}) do |(tax_rate, tax_amount), hash|
-      hash[number_to_percentage(tax_rate.amount * 100, precision: 1)] = Spree::Money.new tax_amount, currency: order.currency
+    totals = OrderTaxAdjustmentsFetcher.new(order).totals
+
+    totals.each_with_object({}) do |(tax_rate, tax_amount), hash|
+      hash[number_to_percentage(tax_rate.amount * 100, precision: 1)] =
+        Spree::Money.new tax_amount, currency: order.currency
     end
   end
 

app/services/order_tax_adjustments_fetcher.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This class will be used to get Tax Adjustments related to an order,
 # and proceed basic calcultation over them.
 
@@ -8,11 +10,7 @@ class OrderTaxAdjustmentsFetcher
 
   def totals
     all.each_with_object({}) do |adjustment, hash|
-      tax_rates = TaxRateFinder.tax_rates_of(adjustment)
-      tax_rates_hash = Hash[tax_rates.collect do |tax_rate|
-        tax_amount = tax_rates.one? ? adjustment.included_tax : tax_rate.compute_tax(adjustment.amount)
-        [tax_rate, tax_amount]
-      end]
+      tax_rates_hash = tax_rates_hash(adjustment)
       hash.update(tax_rates_hash) { |_tax_rate, amount1, amount2| amount1 + amount2 }
     end
   end
@@ -23,6 +21,21 @@ class OrderTaxAdjustmentsFetcher
 
   def all
     order.adjustments.with_tax +
-      order.line_items.includes(:adjustments).map { |li| li.adjustments.with_tax }.flatten
+      order.line_items.includes(:adjustments).map { |li|
+        li.adjustments.with_tax
+      }.flatten
   end
-end
+
+  def tax_rates_hash(adjustment)
+    tax_rates = TaxRateFinder.tax_rates_of(adjustment)
+
+    Hash[tax_rates.collect do |tax_rate|
+      tax_amount = if tax_rates.one?
+                     adjustment.included_tax
+                   else
+                     tax_rate.compute_tax(adjustment.amount)
+                   end
+      [tax_rate, tax_amount]
+    end]
+  end
+end