Hi All,

I have written the below trigger to create a Task on the Account record when the field (OneSource__OSKeyID__c) is Null.

This works great (please be gentle as I'm still learning) and I have created a Test Trigger, however, there is one line of code that is stopping me from getting 100% coverage on this trigger.

The one line is this: 

    setAccount.add(objTask.WhatId);

If someone could help I would be very grateful.

Kev

Trigger

trigger AssignOneSourceTask on Account (after insert) 
{
     Set<Id> setAccount = new Set<Id>();
        for(Task objTask: [Select Id, WhatId from Task where WhatId In: trigger.new and Subject = 'OSKey ID Missing on Account'])
        setAccount.add(objTask.WhatId);
        List<Task> taskList = new List<Task>();
        for(integer i=0; i<trigger.new.size(); i++)
        {
            if(!setAccount.contains(trigger.new[i].Id))
                if (trigger.new[i].OneSource__OSKeyID__c == NULL) 
     {
     Task t = new Task(
     Subject = 'OSKey ID Missing on Account',
     WhatId = trigger.new[i].id,
     Description = 'Please update OSKey ID on Account Record',
     Priority = 'Normal',
     Status = 'Not Started',
     IsReminderSet = True,
     ReminderDateTime = System.now()+1,
     ActivityDate = Date.today()+2,
     OwnerId = '005E0000000YhNn');
     
     taskList.add(t);
     setAccount.add(trigger.new[i].Id);
     }
     }
 if(!taskList.isEmpty())
    insert taskList;
}

Test Trigger 

@isTest
public with sharing class TriggerTest_Account_OneSourceID {
	public static testmethod void testAccount_NoOneSourceID() {
		System.debug('VistageDebug: entering TriggerTest_Account_OneSourceID');
		//Create Test Account
		Account testAccounts = new Account(Name='ACCOUNT_NAME');
		Insert testAccounts;
		
		List<Task> taskList = [SELECT id, ActivityDate, subject from Task WHERE whatId = :testAccounts.id];
        System.assertEquals(1,taskList.size());     
		System.assertEquals('OSKey ID Missing on Account',taskList[0].Subject);
		
	}
	
}