Pijnwis

I have created below batch apex class. I have also created test class for this. But this test class is only covering 27% of batch apex class. Also, it is not calling execute method of batch apex class.

Batch Apex class:

global class LeadDuplicateRemove implements Database.Batchable < sObject > {


    global Database.QueryLocator start(Database.BatchableContext bc) {
        return Database.getQueryLocator('select Id, CreatedDate, Phone, Status, Email from Lead Where convertedbusiness__c != null and LeadAudit__c = null  and isDeleted = false order by CreatedDate ASC Limit 1');
    }

    global void execute(Database.BatchableContext bc, List < Lead > scope) {
        for (Lead lead: scope) {
            Database.QueryLocator leadQueryLocator = Database.getQueryLocator([Select Id, CreatedDate, Phone, Status, Email from Lead where convertedbusiness__c != null and LeadAudit__c = '1' and isDeleted = false order by CreatedDate ASC Limit 1]);

            Database.QueryLocatorIterator iterator = leadQueryLocator.iterator();
            while (iterator.hasNext()) {
                Lead leadObj = (Lead) iterator.next();

                if(lead.ConvertedBusiness__c == leadObj.ConvertedBusiness__c){
                    lead.ConvertedBusiness__c = null;
                }
            }
        } 
    }
    global void finish(Database.BatchableContext bc) {
    }
}

Test class:

@isTest global class LeadDuplicateRemoveTest {
    @testSetup 
    global static void setup() {

        Lead lead1 = new Lead(LastName='testlead1 ', RAF_Nurture_Campaign__c = 'None',
                              company='test', Email='testemai@email.com.invalid',Phone = '1111111111',Status ='Completed');

        insert lead1;
        insert new Lead(LastName='testlead1', RAF_Nurture_Campaign__c = 'None',
                               company='Vtest', Email='testemai@email.com.invalid',Phone = '222222',Status ='Open');

    }
    @isTest global static void TestRun() {         
        Test.startTest();
        Database.executeBatch(new LeadDuplicateRemove());
        Test.stopTest();

    }

}