Hello,

I have written a test class. Its code coverage is 745. I want to increase its coverage.

Test class:
@isTest
private class CreateNewQuoteTest {
    private static testMethod void testManipulateOrders(){
       
        Pricebook2 customPB = new Pricebook2(Name='SDEC GBP Distributor Price Sheet', isActive=true);
        insert customPB;
       
        Account a = new Account();
        a.Name = 'Test Account';
        a.Price_Book__c = customPB.id ;
        insert a;
        
        Contact c = new Contact();
        c.LastName='test';
        insert c;

        Product2 p = new Product2();
        p.Name = 'Test Product ';
        p.Description='Test Product Entry 1';
        p.productCode = 'ABC';
        p.isActive = true;
        p.Family = 'Blackbox'; 
        insert p;

       Id pricebookId = Test.getStandardPricebookId();

        system.debug('standardPb--------------->test'+pricebookId);
        PricebookEntry standardPrice = new PricebookEntry();
        standardPrice.Pricebook2Id = pricebookId;
        standardPrice.Product2Id = p.Id;
        standardPrice.UnitPrice = 1;
        standardPrice.IsActive = true;
        standardPrice.UseStandardPrice = false;
        insert standardPrice ;    
      
        PricebookEntry custompbe2 = new PricebookEntry();
        custompbe2.Pricebook2Id = customPB.Id;
        custompbe2.Product2Id = p.Id;
        custompbe2.UnitPrice = 1;
        custompbe2.IsActive = true;
        custompbe2.UseStandardPrice = false;
        insert custompbe2 ;  
        
        Opportunity o = new Opportunity();
        o.Name = 'Opp';
        o.AccountId = a.Id;
        o.CloseDate= system.today();
        o.StageName = 'Proposal';
        insert o;
        update o;
             
        Quote q = new Quote();
        q.Name= o.Id;
        q.OpportunityId = o.Id;
        q.status = 'Draft'; 
        q.Pricebook2Id = customPB.id;
        insert q;
        
        Invoice__c i = new Invoice__c();
        i.Account__c = a.Id;
        i.Quote__c = q.Id;
        insert i;
        
        Delivery_Notes__c d = new Delivery_Notes__c();
        d.Account__c = a.id;
        d.Opportunity__c = o.Id;
        d.Quote__c = q.Id;
        insert d;
               
        test.StartTest();

        o.StageName = 'Closed Won';
        o.Invoice__r.size();
        system.debug('test---------o.StageName'+o.StageName);
        system.debug('test---------o.Invoice__r.size()'+o.Invoice__r.size());
       
        if(o.StageName  == 'Closed Won' && o.Invoice__r.size() == 0){
                Invoice__c i2 = new Invoice__c();
                system.debug('test---------Invoice'+i2);
        }
        update o;   
               test.StopTest();  

    } 
    
    private static testMethod void testManipulateOrders1(){
          
        Pricebook2 customPB = new Pricebook2(Name='SDEC GBP Distributor Price Sheet', isActive=true);
        insert customPB;
       
        Account a = new Account();
        a.Name = 'Test Account';
        a.Price_Book__c = customPB.id;
        insert a;
        
        Contact c = new Contact();
        c.LastName='test';
        insert c;

        Product2 p = new Product2();
        p.Name = 'Test Product ';
        p.Description='Test Product Entry 1';
        p.productCode = 'ABC';
        p.isActive = true;
        p.Family = 'Blackbox'; 
        insert p;

        Id pricebookId = Test.getStandardPricebookId();

        system.debug('standardPb--------------->test'+pricebookId);
        PricebookEntry standardPrice = new PricebookEntry();
        standardPrice.Pricebook2Id = pricebookId;
        standardPrice.Product2Id = p.Id;
        standardPrice.UnitPrice = 1;
        standardPrice.IsActive = true;
        standardPrice.UseStandardPrice = false;
        insert standardPrice ;    
      
        PricebookEntry custompbe2 = new PricebookEntry();
        custompbe2.Pricebook2Id = customPB.Id;
        custompbe2.Product2Id = p.Id;
        custompbe2.UnitPrice = 1;
        custompbe2.IsActive = true;
        custompbe2.UseStandardPrice = false;
        insert custompbe2 ;   
        
        Opportunity o = new Opportunity();
        o.Name = 'Test opportunity';
        o.AccountId = a.Id;
        o.CloseDate= system.today();
        o.StageName = 'Proposal';
        
        insert o;
        update o;
        
        Quote q = new Quote();
        q.Name= o.Id;
        q.OpportunityId = o.Id;
        q.status = 'Draft'; 
        q.Pricebook2Id = customPB.id;

        insert q;
        
        Invoice__c i = new Invoice__c();
        i.Account__c = a.Id;
        i.Quote__c = q.Id;
        insert i;
        
        Delivery_Notes__c d = new Delivery_Notes__c();
        d.Account__c = a.id;
        d.Opportunity__c = o.Id;
        d.Quote__c = q.Id;
        insert d;
        
       test.StartTest();
              
        o.StageName = 'Closed Won';
        o.Delivery_Notes__r.size();
        system.debug('test---------o.StageName'+o.StageName);
        system.debug('test---------o.Delivery_Notes__r.size()'+o.Delivery_Notes__r.size());
      
        if(o.StageName  == 'Closed Won' && o.Delivery_Notes__r.size() == 0)
                {
            Delivery_Notes__c newDelivery = new Delivery_Notes__c();
            system.debug('test---------Delivery'+newDelivery);
                }
           //update o;
           
          else if(o.StageName  != 'Closed Won' && o.Delivery_Notes__r.size() != 0)
          {
        system.debug('o.StageName  == Closed Won && o.Delivery_Notes__r.size() == 0');
           }

       test.StopTest(); 
      
    }

     private static testMethod void testManipulateOrders2(){
     
        Pricebook2 customPB = new Pricebook2(Name='SDEC GBP Distributor Price Sheet', isActive=true);
        insert customPB;
       
        Account a = new Account();
        a.Name = 'Test Account';
        a.Price_Book__c = customPB.id;
        insert a;
        
        Contact c = new Contact();
        c.LastName='test';
        insert c;

        Product2 p = new Product2();
        p.Name = 'Test Product ';
        p.Description='Test Product Entry 1';
        p.productCode = 'ABC';
        p.isActive = true;
        p.Family = 'Blackbox'; 
        insert p;

        Id pricebookId = Test.getStandardPricebookId();

        system.debug('standardPb--------------->test'+pricebookId);
        PricebookEntry standardPrice = new PricebookEntry();
        standardPrice.Pricebook2Id = pricebookId;
        standardPrice.Product2Id = p.Id;
        standardPrice.UnitPrice = 1;
        standardPrice.IsActive = true;
        standardPrice.UseStandardPrice = false;
        insert standardPrice ;    
      
        PricebookEntry custompbe2 = new PricebookEntry();
        custompbe2.Pricebook2Id = customPB.Id;
        custompbe2.Product2Id = p.Id;
        custompbe2.UnitPrice = 1;
        custompbe2.IsActive = true;
        custompbe2.UseStandardPrice = false;
        insert custompbe2 ;   
        
        Opportunity o = new Opportunity();
        o.Name = 'Test opportunity';
        o.AccountId = a.Id;
        o.CloseDate= system.today();
        o.StageName = 'Proposal';
        
        insert o;
   
        Quote q = new Quote();
        q.Name= o.Id;
        q.OpportunityId = o.Id;
        q.status = 'Draft'; 
        q.Pricebook2Id = customPB.id;

        insert q;
         
        Order od = new Order();
        od.Name = 'Test';
        od.AccountId = a.Id;
        od.status = 'Draft'; 
        od.Your_Order_Reference__c = '123';
        od.EffectiveDate = system.today();
        od.Pricebook2Id =customPB.Id;
        od.OpportunityId = o.Id;
        od.QuoteId= q.id;
        insert od;
       // update od;
        
        Invoice__c i = new Invoice__c();
        i.Account__c = a.Id;
        i.Quote__c = q.Id;
        insert i;
        
        Delivery_Notes__c d = new Delivery_Notes__c();
        d.Account__c = a.id;
        d.Opportunity__c = o.Id;
        d.Quote__c = q.Id;
        insert d;
        
        test.StartTest();
              
        od.status = 'Closed Won';
        od.Orders.size();
        system.debug('test--------- od.status'+ od.status);
        system.debug('test---------od.Orders.size()'+od.Orders.size());
      
        if( od.status  == 'Closed Won' && od.Orders.size() == 0)
                {
         Order newOrder = new Order();
         newOrder.AccountId = a.Id;
         newOrder.OpportunityId = o.Id;
       //  newOrder.QuoteId = q.SyncedQuoteId;
         newOrder.Status = 'Closed Won';
         newOrder.EffectiveDate = system.today();
         newOrder.Pricebook2Id = o.Pricebook2Id;
        insert newOrder;
            system.debug('test---------Order'+newOrder);
                }
       update od;

       test.StopTest(); 
      
    }
}


Trigger:


Its giving an error System.DmlException: Update failed. First exception on row 0 with id 0068E00000BqCLfQAN; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, CreateNewQuote: execution of AfterUpdate

caused by: System.DmlException: Insert failed. First exception on row 0; first error: CANNOT_INSERT_UPDATE_ACTIVATE_ENTITY, CreateInvoiceLineItem: execution of AfterInsert

caused by: System.QueryException: List has no rows for assignment to SObject

Thanks & regards,
Utz