Create an Apex class that uses Batch Apex to update Lead records – Use Batch Apex

Create an Apex class that uses Batch Apex to update Lead records.

Create an Apex class that implements the Database.Batchable interface to update all Lead records in the org with a specific LeadSource. Write unit tests that achieve 100% code coverage for the class.

  • Create an Apex class called ‘LeadProcessor’ that uses the Database.Batchable interface.
  • Use a QueryLocator in the start method to collect all Lead records in the org.
  • The execute method must update all Lead records in the org with the LeadSource value of ‘Dreamforce’.
  • Create an Apex test class called ‘LeadProcessorTest’.
  • In the test class, insert 200 Lead records, execute the ‘LeadProcessor’ Batch class and test that all Lead records were updated correctly.
  • The unit tests must cover all lines of code included in the LeadProcessor class, resulting in 100% code coverage.
  • Run your test class at least once (via ‘Run All’ tests the Developer Console) before attempting to verify this challenge

Code Example:

LeadProcessor Apex Class:


global class LeadProcessor implements Database.Batchable <SObject> {
//Start Method
global Database.QueryLocator Start(Database.BatchableContext bc) {
String Query = ‘Select Id, LeadSource from Lead’;
return Database.getQueryLocator(Query);
//Execute Method
global void execute(Database.BatchableContext bc, List<Lead> Scope) {
if(Scope != null && !Scope.isEmpty()) {
for(Lead L : Scope) {
L.LeadSource = ‘DreamForce’;
update Scope;
//Finish Method
global void finish(Database.BatchableContext bc) {
Id BatchId = bc.getJobId();
system.debug(‘BatchId::’+ BatchId);




LeadProcessorTest – Test Class


public class LeadProcessorTest {
static void setup() {
List<Lead> Leads = new List<Lead>();
for(Integer i=0; i <100; i++) {
Leads.add(new lead(LastName = ‘LastName’+i, FirstName=’FirstName’+i, Email=’test’+i+’’, LeadSource=’Web’, Company=’TRP’));
insert Leads;

static testmethod void test() {
LeadProcessor lp =new LeadProcessor();
Id BatchId = Database.executeBatch(lp);
System.assertEquals([select count() from Lead Where LeadSource=’DreamForce’], 100);


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3x Salesforce MVP | Platform Champion | 18x Salesforce Certified | MuleSoft Certified | 8x Trailhead Ranger | TechForce Services | Sydney | Australia

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