Hi,

Need help in writing Test Class for the below Apex Class which use AggregateResult.
Apex Code:
 

global class AccountProcessor {
    
    @future
    public static void countContacts(List<Id> AccntIds)
    {
        List<Account> list_of_Account = [select Id,sompaul__Number_of_Contacts__c from Account where Id IN: AccntIds];
        system.debug('List of accounts'+list_of_Account);
        List<Account> accountToBeUpdated = new List<Account>();
        Integer Contact_cnt=0;
        //Map<Id,Decimal> = new Map<Id,Decimal>();
        List<AggregateResult> agrRes = [select count(Id),Contact.Account.Id from Contact,Contact.Account where Contact.Account.Id IN : AccntIds group by Contact.Account.Id];
        system.debug('AggregateResult value:'+agrRes);
        
        for(AggregateResult ar: agrRes)
        {
            
            for(Account a:list_of_Account)
            {
                if(a.Id == ar.get('Id'))
                {
                    a.sompaul__Number_of_Contacts__c = (Decimal)ar.get('expr0');
                    accountToBeUpdated.add(a);
                }
            }
            system.debug('Account Data to be updtaed'+accountToBeUpdated);
            
        }
        if(!accountToBeUpdated.isEmpty())
        {
            update accountToBeUpdated;
        }
        
    }
}

Test Class for the above:

@IsTest
private class AccountProcessorTest {
    
    private static testMethod void testAccountProcessor()
    {
        List<Id> accntList = new List<Id>();
        accntList = createAccount();
        Test.startTest();
        AccountProcessor.countContacts(accntList);
        Test.stopTest();
    }
    private static List<Id> createAccount()
    {
        List<Id> accntList = new List<Id>();
        for(Integer i=0;i<10;i++)
        {
            Account a = new Account(Name='Test Account'+i);
            for(Integer j=0;j<5;j++)
            {
                Contact con = new Contact(LastName ='Test Contact'+j,AccountId=a.Id);
            }
            accntList.add(a.Id);
        }
        return accntList;
    }

}

Code Coverage: 50%. Below strike through codes do not fall under test coverage.

global class AccountProcessor {
    
    @future
    public static void countContacts(List<Id> AccntIds)
    {
        List<Account> list_of_Account = [select Id,sompaul__Number_of_Contacts__c from Account where Id IN: AccntIds];
        system.debug('List of accounts'+list_of_Account);
        List<Account> accountToBeUpdated = new List<Account>();
        Integer Contact_cnt=0;
        //Map<Id,Decimal> = new Map<Id,Decimal>();
        List<AggregateResult> agrRes = [select count(Id),Contact.Account.Id from Contact,Contact.Account where Contact.Account.Id IN : AccntIds group by Contact.Account.Id];
        system.debug('AggregateResult value:'+agrRes);
        
        for(AggregateResult ar: agrRes)
        {
            
            for(Account a:list_of_Account)
            {
                if(a.Id == ar.get('Id'))
                {
                    a.sompaul__Number_of_Contacts__c = (Decimal)ar.get('expr0');
                    accountToBeUpdated.add(a);
                }
            }
            system.debug('Account Data to be updtaed'+accountToBeUpdated);
            
        }
        if(!accountToBeUpdated.isEmpty())
        {
            update accountToBeUpdated;
        }
        
    }
}

Can somebody please help here.
Thanks in advance !!