Pass dependencies to ReservationProcess in the constructor

Previous way was required when processes could be run from background job.
Passing dependencies in the constructor is usually preferrable and more testable.

ecommerce/processes/lib/processes.rb

@@ -130,7 +130,7 @@ def enable_three_plus_one_free_process(event_store, command_bus)
 
     def enable_reservation_process(event_store, command_bus)
       event_store.subscribe(
-        ReservationProcess.new,
+        ReservationProcess.new(event_store, command_bus),
         to: [
           Ordering::OrderSubmitted,
           Fulfillment::OrderCancelled,

ecommerce/processes/lib/processes/reservation_process.rb

@@ -2,9 +2,9 @@ module Processes
   class ReservationProcess
     include Infra::Retry
 
-    def initialize
-      @event_store = Configuration.event_store
-      @command_bus = Configuration.command_bus
+    def initialize(event_store, command_bus)
+      @event_store = event_store
+      @command_bus = command_bus
     end
     attr_accessor :event_store, :command_bus
 

ecommerce/processes/test/reservation_process_test.rb

@@ -5,7 +5,7 @@ class ReservationProcessTest < Test
     cover "Processes::ReservationProcess*"
 
     def test_happy_path
-      process = ReservationProcess.new
+      process = ReservationProcess.new(event_store, command_bus)
       assert_success_event do
         given([order_submitted]).each { |event| process.call(event) }
       end
@@ -31,8 +31,7 @@ def call(command)
     def test_rejects_order_and_compensates_stock_when_sth_is_unavailable
       failing_command = Inventory::Reserve.new(product_id: product_id, quantity: 1)
       enhanced_command_bus = EnhancedFakeCommandBus.new(command_bus, failing_command => Inventory::InventoryEntry::InventoryNotAvailable)
-      process = ReservationProcess.new
-      process.command_bus = enhanced_command_bus
+      process = ReservationProcess.new(event_store, enhanced_command_bus)
 
       assert_failure_event do
         given([order_submitted]).each { |event| process.call(event) }
@@ -46,7 +45,7 @@ def test_rejects_order_and_compensates_stock_when_sth_is_unavailable
     end
 
     def test_release_stock_when_order_is_cancelled
-      process = ReservationProcess.new
+      process = ReservationProcess.new(event_store, command_bus)
       given([order_submitted]).each { |event| process.call(event) }
 
       command_bus.clear_all_received
@@ -58,7 +57,7 @@ def test_release_stock_when_order_is_cancelled
     end
 
     def test_dispatch_stock_when_order_is_confirmed
-      process = ReservationProcess.new
+      process = ReservationProcess.new(event_store, command_bus)
       given([order_submitted]).each { |event| process.call(event) }
 
       command_bus.clear_all_received