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Topics#ApexArpita Kaushik's Question
Arpita Kaushik asked in #Apex
Dec 27, 2016, 7:36 PM

Test Class error - Null pointer Exception

I have the following Batch Job and corresponding test class

Batch Job:

global class WBStrategyBatch implements Database.Batchable<sObject>{

    public String query;

    public static final String QUERY_STRING = 'Select Id, Name, Market_Value_Total__c, (select Id, Name, Market_Value_for_Strategy_Total__c from WB_Accounts__r where Account_Status__c=\'Active\') from WB_Strategy__c where Id IN (Select Strategy__c from WB_Account__c)';

    

    global database.querylocator start(Database.BatchableContext BC)

  {

      return Database.getQueryLocator(query);

  }

  

  global void execute(Database.BatchableContext BC, List<sObject> scope)

  {

    decimal totalMarketValue=0;

    

    for (sObject obj: scope){

      totalMarketValue = 0;

      WB_Strategy__c wbStrategy = (WB_Strategy__c)obj;

      for (WB_Account__c wbAcc: wbStrategy.WB_Accounts__r){

        totalMarketValue = totalMarketValue + wbAcc.Market_Value_for_Strategy_Total__c;

      }

      wbStrategy.Market_Value_Total__c = totalMarketValue;

      update wbStrategy;

    }

      

  }

  

    global void finish(Database.BatchableContext BC)

  {

    System.debug('WB Strategy Groups Batch finished.');

  }

  

}

Test Class:

@isTest

private class WBStrategyBatchTest {

    public static testMethod void testWBStrategy(){

   

    String query = 'Select Id, Name, Market_Value_Total__c, (select Id, Name, Market_Value_for_Strategy_Total__c from WB_Accounts__r where Account_Status__c=\'Active\') from WB_Strategy__c where Id IN (Select Strategy__c from WB_Account__c) LIMIT 2';

   

     WB_Strategy__c[] wbStrgy = new List<WB_Strategy__c>();

    

           WB_Strategy__c wb1 = new WB_Strategy__c(Name='WBStrategy', Market_Value_Total__c=100);  

              

           wbStrgy.add(wb1);

    

     insert wbStrgy;

    

     Test.startTest();

     WBStrategyBatch wb = new WBStrategyBatch();

      Database.executeBatch(wb);

    

     Test.stopTest();

  } 

                     

}

While running the test class I am receiving the following error

System.NullPointerException: Argument 1 cannot be null

Please help

 
1 answer
  1. Amit Chaudhary (Info Services)
    Dec 27, 2016, 11:55 PM

    Update your test class like below

    @isTest
    private class WBStrategyBatchTest 
    {
        public static testMethod void testWBStrategy()
    	{
            WB_Strategy__c wb1 = new WB_Strategy__c(Name='WBStrategy', Market_Value_Total__c=100); 
    		// add all required field	
    		insert wb1;
    		WB_Account__c obj = new WB_Account__c();
    		// add all required field
    		obj.Strategy__c = wb1.id;
    		insert obj;
    		Test.startTest();
    			WBStrategyBatch wb = new WBStrategyBatch();
    			Database.executeBatch(wb);
    		Test.stopTest();
    	} 
    }

    If you will get any issue please post with screen shot

     
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