How To Format Helper Class In Trigger Handler Framework?

Question

I am trying to implement the Trigger Handler Framework as seen here: https://www.salesforceben.com/the-salesforce-trigger-handler-framework/. It uses the following model 'Helper + Interface + Handler + Trigger'. I have saved the Trigger, the Handler, the Interface, and Helper and am trying to update the Helper file in order to create a simple Before Update trigger on the Account object.

Account Trigger Helper class:

public without sharing class AccountTriggerHelper {
public AccountTriggerHelper() {
    System.debug('Inside AccountTriggerHelper Constructor');
}
public void doTask1(List<Account> newAccounts) {
   List<Account> accountList = new List<Account>();
   for(Account acc : newAccounts){
   acc.Phone = '222-222-2222';
   accountList.add(acc);
   }
   UPDATE accountList;
   System.debug('Inside Task 1');
}

Account Trigger Handler class:

public without sharing class AccountTriggerHandler implements TriggerHandler {
private boolean triggerIsExecuting;
private integer triggerSize;
public AccountTriggerHelper helper;
public AccountTriggerHandler(boolean triggerIsExecuting, integer triggerSize) {
    this.triggerIsExecuting = triggerIsExecuting;
    this.triggerSize = triggerSize;
    this.helper = new AccountTriggerHelper();
}
public void beforeInsert(List<Account> newAccounts) {
    helper.doTask1();
    helper.doTask2();
}

However, I am getting the following error:

Method does not exist or incorrect signature: void doTask1() from the type AccountTriggerHelper

Answer 1

The doTask1 method defined at AccountTriggerHelper expects a List but you're not passing any as argument when you call it from the beforeInsert method.

Instead you should have:

public void beforeInsert(List<Account> newAccounts) {
    helper.doTask1(newAccounts);
}