add some style refactoring

app/services/fees/subscription_service.rb

@@ -57,21 +57,13 @@ def initialize_fee(new_amount_cents)
       units = adjusted_fee.units
       unit_amount_cents = adjusted_fee.unit_amount_cents.round
       amount_cents = adjusted_fee.adjusted_units? ? (units * new_amount_cents) : (units * unit_amount_cents)
-      Fee.new(
-        invoice:,
-        subscription:,
-        amount_cents: amount_cents.round,
-        amount_currency: plan.amount_currency,
-        fee_type: :subscription,
-        invoiceable_type: 'Subscription',
-        invoiceable: subscription,
-        units:,
-        properties: boundaries.to_h,
-        payment_status: :pending,
-        taxes_amount_cents: 0,
-        unit_amount_cents: adjusted_fee.adjusted_units? ? new_amount_cents : unit_amount_cents,
-        invoice_display_name: adjusted_fee.invoice_display_name,
-      )
+
+      base_fee.amount_cents = amount_cents.round
+      base_fee.units = units
+      base_fee.unit_amount_cents = adjusted_fee.adjusted_units? ? new_amount_cents : unit_amount_cents
+      base_fee.invoice_display_name = adjusted_fee.invoice_display_name
+
+      base_fee
     end
 
     def adjusted_fee

spec/scenarios/invoices/adjusted_subscription_fees_spec.rb

@@ -30,7 +30,7 @@
   around { |test| lago_premium!(&test) }
 
   context 'with adjusted units' do
-    it 'creates invoice numbers correctly' do
+    it 'creates invoices correctly' do
       # NOTE: Jul 19th: create the subscription
       travel_to(subscription_at) do
         create_subscription(
@@ -84,7 +84,7 @@
   context 'with adjusted amount' do
     let(:unit_amount_cents) { 15_000 }
 
-    it 'creates invoice numbers correctly' do
+    it 'creates invoices correctly' do
       # NOTE: Jul 19th: create the subscription
       travel_to(subscription_at) do
         create_subscription(