public void NotificationRepository_DeleteById_ThrowsExceptionWhenIdNotFound()
{
//arrange
INotificationRepo nr = GetInMemoryNotificationRepository();
//assert
Assert.ThrowsAny <ArgumentNullException>(() => nr.DeleteById(0));
}
public void NotificationRepository_DeleteById_DeletesNotification()
{
//arrange
INotificationRepo nr = GetInMemoryNotificationRepository();
//act
nr.Add(notification);
nr.DeleteById(1); //NotificationId should be 1
//assert
Assert.ThrowsAny <ArgumentNullException>(() => nr.GetById(1));
}