Hi, 

  I wrote a trigger which is working as expected for the requirement my problem is with the test class I wrote a test class which is giving only 54% code coverage I need suggest on the lines which are not covered in the trigger 
 

trigger GenQuoteApproval on QuoteLineItem (After Insert, After Update, After Delete) {

  Decimal LineMaxDiscount;
  Decimal LineMaxACV;
  Decimal SubLineMaxDiscount;
  Decimal SubLineMaxACV;
  Decimal SerLineMaxDiscount;
  Decimal SerLineMaxACV;
  Decimal TraLineMaxDiscount;
  Decimal TraLineMaxACV;
  Map<ID, Quote> ParentQuote = new Map<ID, Quote>();
  String SALREPID;
  String MRGID;
  String SALID;
  String CFOID;
  String SERID;
  String TRAID;
  String Level;
  Integer GSublevel1Count;
  Integer GSublevel2Count;
  Integer GSublevel3Count;
  Integer GSublevel4Count;
  Integer GSerlevel1Count;
  Integer GSerlevel2Count;
  Integer GSerlevel3Count;
  Decimal SubscriptionTerm;
  Integer GTralevel1Count;
  Integer GTralevel2Count;
  Integer GTralevel3Count;
 
Try 
{
if ( Trigger.isAfter)
  {
 List<Id> listIds = new List<Id>();
 //Set<Id> listIds = new Set<Id>();

 List<Quote> QuotetList = new List<Quote>();

 /* Get Quote ID */
 for (QuoteLineItem childquoteline :  Trigger.new)
 {
        listIds.add(childquoteline.QuoteId);
    }

 ParentQuote = new Map<Id, Quote>([SELECT id,Level_1__c,Level_2__c,Level_3__c,Level_4__c FROM Quote WHERE ID IN :listIds]);


  /* Get service list of all quote id */
  list<id> serviceid = new list<id>();
  for(QuoteLineItem getserviceid : [select id  from  QuoteLineItem
                                     where quoteid in :listIds and
                                           product2.Productcode  like 'CBSVC%'] )
   {
      serviceid.add(getserviceid.id);

   }

  /* Get subscription list of all quote id */
  list<id> subscriptionid = new list<id>();
  for(QuoteLineItem getsubscriptionid : [select id  from  QuoteLineItem
                                     where quoteid in :listIds and
                                           Subscription_Terms__c <> 0] )
   {
      subscriptionid.add(getsubscriptionid.id);

   }

 /* Subscription Discount and ACV */
    List<AggregateResult> MaxSubscription = [select max(Discount_Percent__c) SubQuoteLineMaxDiscount,sum(f_ACV__c) SubQuoteLineMaxACV
                                                   from  QuoteLineItem
                                                   where quoteid in :listIds and Subscription_Terms__c <> 0 and
                                                         ID not in :serviceid
                                                 ];

  for (AggregateResult SubQuoteMaxDiscount : MaxSubscription)
  {
  SubLineMaxDiscount = (Decimal)SubQuoteMaxDiscount.get('SubQuoteLineMaxDiscount');
  SubLineMaxACV = (Decimal)SubQuoteMaxDiscount.get('SubQuoteLineMaxACV');
  }

   system.debug('Subscription Line Discount  :' + SubLineMaxDiscount);
   system.debug('Subscription Line ACV  :' + SubLineMaxACV);

   /* Service Discount and ACV */
  List<AggregateResult> MaxService = [select max(Discount_Percent__c) SerQuoteLineMaxDiscount,SUM(f_ACV__c) SerQuoteLineMaxACV
                                      from  QuoteLineItem
                                      where quoteid in :listIds and product2.Productcode  like 'CBSVC%' and
                                            id not in :subscriptionid];

  for (AggregateResult SerQuoteMaxDiscount : MaxService)
  {
  SerLineMaxDiscount = (Decimal)SerQuoteMaxDiscount.get('SerQuoteLineMaxDiscount');
  SerLineMaxACV = (Decimal)SerQuoteMaxDiscount.get('SerQuoteLineMaxACV');
  }

   system.debug('Service Line Discount  :' + SerLineMaxDiscount);
   system.debug('Service Line ACV  :' + SerLineMaxACV);
   
   
   /* Training Discount and ACV */
  List<AggregateResult> MaxTraining = [select max(Discount_Percent__c) SerQuoteLineMaxDiscount,SUM(f_ACV__c) TraQuoteLineMaxACV
                                      from  QuoteLineItem
                                      where quoteid in :listIds and product2.Productcode  like 'T%' and
                                            id not in :subscriptionid];

  for (AggregateResult TraQuoteMaxDiscount : MaxTraining)
  {
  TraLineMaxDiscount = (Decimal)TraQuoteMaxDiscount.get('TraQuoteLineMaxDiscount');
  TraLineMaxACV = (Decimal)TraQuoteMaxDiscount.get('TraQuoteLineMaxACV');
  }

   system.debug('Training Line Discount  :' + TraLineMaxDiscount);
   system.debug('Training Line ACV  :' + TraLineMaxACV);
   

  Opportunity Opp = [select ownerid
                    from opportunity
                    where
                    id in (select OpportunityId from quote where id in :listIds) ];

  system.debug(listIds);
  
  SubscriptionTerm = ApprovalUtils.GetSubscriptionTerm(listIds);
  

  system.debug('Get New Subscription Term' + SubscriptionTerm);
  
  /* Get Manager ID */
  User Usr = [select managerid from user where id = :opp.ownerid];

 /* Subscription Query to get level 1..4 values */
   if ( SubscriptionTerm != null &&
        SubLineMaxACV != null &&
        SubLineMaxDiscount != null)
   {
       GSublevel1Count = ApprovalUtils.SubLevel1(SubscriptionTerm , SubLineMaxACV , SubLineMaxDiscount);

       system.debug('Subscription Level1 :' + GSublevel1Count);

       GSublevel2Count = ApprovalUtils.SubLevel2(SubscriptionTerm , SubLineMaxACV , SubLineMaxDiscount);

       system.debug('Subscription Level2 :' + GSublevel2Count);

       GSublevel3Count = ApprovalUtils.SubLevel3(SubscriptionTerm , SubLineMaxACV , SubLineMaxDiscount);

       system.debug('Subscription Level3 :' + GSublevel3Count);

       GSublevel4Count = ApprovalUtils.SubLevel4(SubscriptionTerm , SubLineMaxACV , SubLineMaxDiscount);

       system.debug('Subscription Level4 :' + GSublevel4Count);

        
   }    
   
      /* Service Query to get level 1..4 values */
   if (SerLineMaxACV != null && SerLineMaxDiscount != null)
    {
       GSerlevel1Count = ApprovalUtils.SerLevel1(SerLineMaxACV,SerLineMaxDiscount);

       system.debug('Service Level1 :' + GSerlevel1Count);

        GSerlevel2Count = ApprovalUtils.SerLevel2(SerLineMaxACV,SerLineMaxDiscount);

       system.debug('Service Level2 :' + GSerlevel2Count);

        GSerlevel3Count = ApprovalUtils.SerLevel3(SerLineMaxACV,SerLineMaxDiscount);

       system.debug('Service Level3 :' + GSerlevel3Count);
    } 
    
        /* Training Query to get level 1..4 values */
   if (TraLineMaxACV != null && TraLineMaxDiscount != null)
    {
        GTralevel1Count = ApprovalUtils.TraLevel1(TraLineMaxACV,TraLineMaxDiscount);

       system.debug('Training Level1 :' + GTralevel1Count);

        GTralevel2Count = ApprovalUtils.TraLevel2(TraLineMaxACV,TraLineMaxDiscount);

       system.debug('Training Level2 :' + GTralevel2Count);

        GTralevel3Count = ApprovalUtils.TraLevel3(TraLineMaxACV,TraLineMaxDiscount);

       system.debug('Training Level3 :' + GTralevel3Count);
    }
   
   If( GSublevel1Count >= 1  || GSerlevel1Count >= 1 ||  GTralevel1Count >= 1 )
     {
      SALREPID = Opp.OwnerId;
      SERID = '0053400000839zg';
      TRAID = '00580000006GbpI';
      }   
     
     
    If (GSublevel2Count >= 1 || GSerlevel2Count >= 1 || GTralevel2Count >= 1 )
    {
      SALREPID = NULL;
      MRGID = Usr.managerid;
      SERID = '0053400000839zg';
      TRAID = '00580000006GbpI';
    }
       
    
    /* Future here you may have to change for amount > 1000000 if its going only to SVP */
   If ( GSublevel3Count >= 1 || GSerlevel3Count >= 1 || GTralevel3Count >= 1)
      {
      SALREPID = NULL;
      MRGID = Usr.managerid;
      SALID = '00580000007jaoA';
      SERID = '0053400000839zg';
      TRAID = '00580000006GbpI';
      }
      
    If ( GSublevel4Count >= 1 )
    {
    SALREPID = NULL;
    MRGID = Usr.managerid;
    SALID = '00580000007jaoA';
    CFOID = '00580000006HV0w';
    Level = '4sub';
    }  
  
    //system.debug('Which Level :' + Level);
    system.debug('Sales Rep :' + SALREPID);
    system.debug('Manager :' + MRGID);
    system.debug('Sales Ops :' + SALID);
    system.debug('CEO CFO :'  + CFOID);

for (QuoteLineItem gqtl : Trigger.new)
 {
   Quote MyParentQuote = ParentQuote.get(gqtl.QuoteId);

    MyParentQuote.Level_1__c = SALREPID;
    MyParentQuote.Level_2__c=MRGID;
    MyParentQuote.Level_3__c=SALID;
    MyParentQuote.Level_4__c=CFOID;
    MyParentQuote.Level_5_Service__c = SERID;
    MyParentQuote.Level_6_Training__c = TRAID;
 
  }

  update ParentQuote.values();

 }
}

catch(Exception e) {
    System.debug('The following exception has occurred: ' + e.getMessage());    
}
  
}

In trigger line 157 to 243 code is not covered in above trigger which is high lighting red in color below is the test class which i have written which is giving only 54% code coverage please suggest me how to get 100% code coverage 

Test class

@istest(seealldata=true)
public class ApprovalUtils_Test_New{
    @isTest(SeeAllData=true) // required for using the standard pricebook, unfortunately
    public static void ApprovalUtilsTest() {
        Decimal SubscriptionTerm;
        
                 ApprovalUtils.SubLevel1(1,0,0);
                 ApprovalUtils.SubLevel2(1,0,10);
                 ApprovalUtils.SubLevel3(1,0,11);
                 ApprovalUtils.SubLevel4(1,0,41);
               
                 ApprovalUtils.SerLevel1(1,1);
                 ApprovalUtils.SerLevel2(1,10);
                 ApprovalUtils.SerLevel3(1,41);
                 
                 ApprovalUtils.TraLevel1(1,1);
                 ApprovalUtils.TraLevel2(1,10);
                 ApprovalUtils.TraLevel3(1,41);
                 
        
      Profile pf = [SELECT Id FROM Profile WHERE Name='Standard User']; 
      
       User u2 = new User(Alias = 'newUser', Email='newuser@testorg.com', 
         EmailEncodingKey='UTF-8', LastName='Testing', LanguageLocaleKey='en_US', 
         LocaleSidKey='en_US', ProfileId = pf.Id, 
         TimeZoneSidKey='America/Los_Angeles', UserName='newuser@testorg.com');         
                 
        Account a = new Account(Name = 'Test Account');
        insert a;

        Opportunity o = new Opportunity(Name = 'Test Opp', StageName = 'Test Stage', CloseDate = Date.today(), AccountId = a.Id);
        insert o;

        Pricebook2 pb = [select Id from Pricebook2 where IsStandard = true limit 1];

        Product2 p = new Product2(Name = 'T-Product', isActive = true);
        insert p;

        PricebookEntry pbe = new PricebookEntry(Pricebook2Id = pb.Id, Product2Id = p.Id, UnitPrice = 1, isActive = true);
        insert pbe;

        Quote q = new Quote(Name = 'Test Quote', OpportunityId = o.Id, PriceBook2Id = pb.Id);
        insert q;

        QuoteLineItem qli = new QuoteLineItem(QuoteId = q.Id, PriceBookEntryId = pbe.Id, Quantity = 1, UnitPrice = 100,
                       Subscription_Terms__c=1,Number_of_Nodes__c=1);
        insert qli;
        
                     
    }
     
    }

Thanks
Sudhir