refactoring and integration tests

PracticeCalendar.Domain/Common/DomainEventBase.cs

@@ -3,5 +3,6 @@
     public class DomainEventBase
     {
         public DateTime EventDate { get; protected set; } = DateTime.UtcNow;
+        public bool IsPublished { get; set; }
     }
 }

PracticeCalendar.Domain/Common/DomainEventNotification.cs

@@ -0,0 +1,14 @@
+using MediatR;
+
+namespace PracticeCalendar.Domain.Common
+{
+    public class DomainEventNotification<TDomainEvent> : INotification where TDomainEvent : DomainEventBase
+    {
+        public TDomainEvent DomainEvent { get; }
+
+        public DomainEventNotification(TDomainEvent domainEvent)
+        {
+            DomainEvent = domainEvent;
+        }
+    }
+}

PracticeCalendar.Domain/Common/Interfaces/IDomainEventService.cs

@@ -0,0 +1,7 @@
+namespace PracticeCalendar.Domain.Common.Interfaces
+{
+    public interface IDomainEventService
+    {
+        Task Publish(DomainEventBase domainEvent);
+    }
+}