I am trying to create a test for "after insert" on OrderItem.,
I have so far the following:


@isTest 
 public static testMethod void MyTestOrderItem()   { 
   List<Account> AccountList = new List<Account>();
   Account Account_0 = new Account( Name='NAME1');
   AccountList.add(Account_0);
   Account Account_1 = new Account( Name='NAME2');
   AccountList.add(Account_1);
   insert AccountList;


    Product2 p = new Product2();
    p.Name = ' Test Product ';
    p.Description='Test Product Entry 2';
    p.productCode = 'ABCD';
    p.isActive = true;
    insert p;


   PriceBook2 pb2Standard = [select Id from Pricebook2 where isStandard=true];
   Id pricebookId = pb2Standard.Id;

    // Insert PricebookEntry=
    PricebookEntry standardPrice = new PricebookEntry();
    standardPrice.Pricebook2Id = pricebookId;
    standardPrice.Product2Id = p.Id;
    standardPrice.UnitPrice = 1;
    standardPrice.IsActive = true;
    standardPrice.UseStandardPrice = false;
    insert standardPrice;


  List<Order> OrderList = new List<Order>();
  Order Order_0 = new Order(Pricebook2Id= pricebookId,  Status='Draft',Name='4TJI5',EffectiveDate=Date.Today(),AccountId=AccountList[0].Id);
  OrderList.add(Order_0);
  Order Order_1 = new Order(Pricebook2Id= pricebookId, Status='Draft',Name='0TXZU',EffectiveDate=Date.Today(),AccountId=AccountList[0].Id);
  OrderList.add(Order_1);
  insert OrderList;
 
  List<OrderItem> OrderItemList = new List<OrderItem>();
  OrderItem OrderItem_0 = new OrderItem(Product2id = p.id , PriceBookEntryId=standardPrice.Id, Description='FD3G8',OrderId=OrderList[0].Id);
  OrderItemList.add(OrderItem_0);
  OrderItem OrderItem_1 = new OrderItem( Product2id = p.id, PricebookEntryId=standardPrice.Id, Description='PB4DM',OrderId=OrderList[0].Id);
  OrderItemList.add(OrderItem_1);
  insert OrderItemList;
} 
}

Would this help in my unit test , or is there a simpler test for OrderItem ?