Hi,
    I have written code for class named as "InvoiceTriggerhandler".this class corresponding test class named as "Invocie Triggerhandlertest".my test class in failing and i got the below  error "


Invoice Trigger Handler:

Public Class InvoiceTriggerHandler{
    
    Public Void OnAfterInsert(Map<id, Invoice__c> newInvoiceMap,Map<id, Invoice__c> oldInvoiceMap){
        
    }
    
    Public Void OnAfterUpdate(Map<id, Invoice__c> newInvoiceMap,Map<id, Invoice__c> oldInvoiceMap){
        if(RecursiveHandler.runITH_POOnce()) PlaceOrder(newInvoiceMap, oldInvoiceMap);
    }
    
    Private Void PlaceOrder(Map<id, Invoice__c> newInvoiceMap, Map<id, Invoice__c> oldInvoiceMap){
        List<id> invIdToPlaceOrders=new List<Id>();
        List<id> quoteIds=new List<Id>();
        for(Invoice__c inv:newInvoiceMap.values()){
            if(inv.Generate_order__c== True  && inv.Generate_order__c!=oldInvoiceMap.get(inv.Id).Generate_order__c){
                invIdToPlaceOrders.add(inv.id);
                quoteIds.add(inv.Quote__c);
            }
        }
        Map<id, Quote> qteMap=new Map<Id, Quote>([SELECT BillingCity,BillingCountry,BillingCountryCode,BillingLatitude,BillingLongitude,BillingName,BillingPostalCode,BillingState,BillingStateCode,BillingStreet,ContactId,Contact.FirstName,Contact.LastName,Description,Discount,Email,ExpirationDate,Fax,GrandTotal,Id,LineItemCount,Name,OpportunityId,Phone,Pricebook2Id,QuoteNumber,ShippingCity,ShippingCountry,ShippingCountryCode,ShippingHandling,ShippingLatitude,ShippingLongitude,ShippingName,ShippingPostalCode,ShippingState,ShippingStateCode,ShippingStreet,Status,Subtotal,Tax,TotalPrice,Dead_Line__c FROM Quote where id IN:quoteIds]);        
        List<Order> listOrderToInsert=new List<Order>();
        Order temp;
        Invoice__c inv;
        Quote qte;
        for(id invId:invIdToPlaceOrders){
            temp=new Order();
            inv=newInvoiceMap.get(invId);
            qte=qteMap.get(inv.Quote__c);
            temp.QuoteId=inv.Quote__c;
            temp.AccountId=inv.AccountID__c;
            temp.OpportunityId=inv.Opportunity__c;
            temp.billTocontactId=qte.ContactID;
            temp.billingStreet=qte.billingStreet;
            temp.billingCity=qte.billingCity;
            temp.billingState=qte.billingState;
            temp.billingCountry=qte.billingCountry;
            temp.BillingPostalCode=qte.BillingPostalCode;
            
            temp.ShippingStreet=qte.ShippingStreet;
            temp.ShippingCity=qte.ShippingCity;
            temp.ShippingState=qte.ShippingState;
            temp.ShippingCountry=qte.ShippingCountry;
            temp.ShippingPostalCode=qte.ShippingPostalCode; 
            temp.EffectiveDate=System.today();
            temp.Status='Initial Progress';
            temp.Invoice__c=invId;
            temp.Pricebook2Id=qte.Pricebook2Id;
            temp.EndDate=qte.Dead_Line__c;
            listOrderToInsert.add(temp);
        }
        if(listOrderToInsert.size()>0)
            insert listOrderToInsert;
    }
    
}
Invoice Triggerhandler Test:
---------------------------------------
@isTest(SeeAllData=true)

Public Class InvoiceTriggerHandlerTest{
    
    @isTest public Static void TestPlaceOrder(){
    
    Account a= new Account(Name='testprimary');
    insert a;
    Contact NewCon= New Contact ( LastName ='Test contact',Accountid =a.id);
    insert NewCon;
    
    Opportunity opp=New Opportunity(Name='Test Opportunity',Accountid=a.id,StageName='Closed Won',CloseDate=System.today());
    insert opp;
    
    
     
    Quote qt=[SELECT id,Name FROM Quote Limit 1];
    
   
    Product2 prod=[SELECT id,Category__c from Product2 where Exclude_Pricing_Matrix__c=false AND Category__c='Item Category: A' LIMIT 1];
    Id pbId=[SELECT id from PriceBook2 where name='Standard Price Book' LIMIT 1].id;
    id PBEId=[SELECT id from PricebookEntry where Product2Id=:prod.Id and Pricebook2Id=:pbId LIMIT 1].Id; 
    
    QuoteLineItem qli=new QuoteLineItem (quoteid=qt.id,PricebookEntryId=PBEId,Follow_Pricing_Matrix__c=TRUE,Capacity__c='64 MB',Description='Testing Description',Quantity=30,UnitPrice=100);
    insert qli;
    
    Order ord=New Order(Name='Test Opportunity',Quoteid=qt.id, Accountid=a.id,Opportunityid=opp.id,BillToContactid=NewCon.id,ShipToContactid=NewCon.id,Manufacturer_Email__c='Test@merfantz.com',Status ='shipping',EffectiveDate=System.today());
    insert ord;
    
    
    List<Order> listOrderToInsert=new List<Order>();
    Order qte = new Order();
    listOrderToInsert.add(ord);
    Test.StartTest();
    insert listOrderToInsert;
    Test.stopTest();
   }
}

Order Trigger Handler:
----------------------------------
Public Class OrderTriggerHandler{
    
    Public Void OnAfterInsert(Map<id, Order> newOrderMap){
        AddProducts(newOrderMap);    
    }
    
    Public Void OnAfterUpdate(Map<id, Order> newOrderMap,Map<id, Order> oldOrderMap){
        
    }
    
    Private Void AddProducts(Map<id, Order> newOrderMap){
        List<id> quoteIds=new List<Id>();
        for(Order ord:newOrderMap.values()){
            quoteIds.add(ord.QuoteId);
        }
        
        Map<id, Quote> qteMap=new Map<Id, Quote>([SELECT id,(SELECT id,Quantity,UnitPrice,Capacity__c, Pricebookentryid from QuoteLineItems) FROM Quote where id IN:quoteIds]);        
        List<OrderItem> listOrLIs=new List<OrderItem>();
        OrderItem OrLI;
        for(Order ord:newOrderMap.values()){  
                 
            for(QuoteLineItem qLI: qteMap.get(ord.Quoteid).QuoteLineItems){
                OrLI=new OrderItem();
                OrLI.PriceBookEntryId=qLI.PriceBookEntryId;
                OrLI.Orderid=ord.Id;
                OrLI.Capacity__c=qLI.Capacity__c;
                OrLI.Quantity=qLI.Quantity;
                OrLI.Unitprice=qLI.UnitPrice;
                listOrLIs.add(OrLI);
            }        
        }
       if(listOrLIs.size()>0) insert listOrLIs;
    }
    
}





Please help me anyone