Hi,

I am trying to run the test class for the below apex class, but I am getting issue attempt to de-reference a null object:

at line "ownerids.add(AssetRecord.OwnerId)".

Even though I am able to see the value at line   system.debug('**** AssetRecords OwnerId ' + AssetRecord.OwnerId);

APEX CLASS:

------------------

global class OpportunitiesAmounts implements
                                    Database.Batchable<SObject>{
 
 private final List<Id> ownerids;

 private final String template = 'Sample Template';
 private static Map<Id,Id> opportunityrevenueMap = new Map<Id,Id>();
 private static Map<Id,string> EquipmentrevenueMap = new Map<Id,string>();
 
 global Database.queryLocator
                         start(Database.BatchableContext ctx){
  string query = 'select Id, Equipment_Title__c, Total_Revenue__c from Equipment__c  where Total_Revenue__c >= 100000' ;                  
  return Database.getQueryLocator(query);                       
  }                                                      
 
 global void execute(Database.BatchableContext BC, List<sObject> scope)
  {
   for(Sobject EquipmentItem : scope )
   {
    EquipmentrevenueMap.put(string.valueof(EquipmentItem.get('Id')), string.valueof(EquipmentItem.get('Equipment_title__c')));
   }
  List<Opportunity> opportunityEquipmentList = [select Id, Equipment__c, Asset__c from Opportunity
                                   where Equipment__c IN :EquipmentrevenueMap.KeySet()];                                                                
  for(Opportunity opportunityItem : opportunityEquipmentList)
  {
   opportunityrevenueMap.put(opportunityItem.Asset__c,opportunityItem.Id);
  }  
  for(Asset__c AssetRecord : [select Id, OwnerId,Name from Asset__c
                                    where Id in :opportunityrevenueMap.KeySet()])  {
                                    
    system.debug('**** AssetRecords Id ' + AssetRecord.Id);
    system.debug('**** AssetRecords Name ' + AssetRecord.Name);
    system.debug('**** AssetRecords OwnerId ' + AssetRecord.OwnerId);
                                 
    ownerids.add(AssetRecord.OwnerId);
  }
 
  if(ownerids.size() > 0) {  
   Messaging.MassEmailMessage mail = new Messaging.MassEmailMessage();
   mail.setTargetObjectIds(ownerids);
   mail.setTemplateId([select Id from EmailTemplate where Name = :template].Id);
   Messaging.SendEmail(new Messaging.MassEmailMessage[] { mail });
  }    
  }

  global void finish(Database.BatchableContext BC)
  {
  }
   
 }

Note: Infact I am populating owner id value with UserInfo.getUserId() in test class and the system.debug('**** AssetRecords OwnerId ' + AssetRecord.OwnerId) also displays the same id.

Please help me on resolving this issue.

Thanks,

JBabu.