Hello 
I am not getting code coverage for this class..anyone please help me
Class:
global class MERCVerificationServiceBatch implements Database.Batchable<sObject>, Database.AllowsCallouts {
    
    String query;
     Set<String> Loyalty_StatusLst;
    global MERCVerificationServiceBatch() {
        Loyalty_StatusLst = new Set<String>{Constants.LOYALTY_AVAILED ,Constants.LOYALTY_AVAILABLE};
        query = 'SELECT Id,Application_Id__c,Is_Customer_Interested__c,Loyalty_Status__c,MCM_Authorized__c  FROM genesis__Applications__c where genesis__CL_Product__r.Category__c = \'MFI\' and MCM_Authorized__c= false and Loyalty_Status__c IN :Loyalty_StatusLst';        
    }
    
    global Database.QueryLocator start(Database.BatchableContext BC) {
        return Database.getQueryLocator(query);
    }

    global void execute(Database.BatchableContext BC, List<genesis__Applications__c> scope) {
        //try{
            List<genesis__Applications__c> applicationLst =  MERCVerificationService.sendRequest(scope); 
            System.debug('1#####' + applicationLst);
            List<genesis__Applications__c> childAppLst = MERCVerificationService.updateChildApplications(applicationLst);
            System.debug('2#####' + childAppLst);
            if(!childAppLst.isEmpty()){
                GroupLoanService.MCMRenewalUpdateRequest req = new GroupLoanService.MCMRenewalUpdateRequest();
                for(genesis__Applications__c app : childAppLst){
                    GroupLoanService.cls_UpdateApplications applicationObj = new GroupLoanService.cls_UpdateApplications();
                    applicationObj.Application_Id = app.Application_Id__c ;
                    applicationObj.loanOnbordingStatus = Constants.LOYALTY_DISBURSEMENT_STATUS;
                    applicationObj.losId = app.Id;
                    applicationObj.disbursedDate = app.LMS_System_Date__c != null ? app.LMS_System_Date__c.format() : System.today().format();
                    req.Applications.add(applicationObj);
                }
                GroupLoanService.sendRequest(req);
                update childAppLst;
            }
            update applicationLst;
        //}catch(Exception e){
          //  System.debug('Exception occurs' + e);
        //}
    
    }
    
    global void finish(Database.BatchableContext BC) {
        
    }
    
}


Test Class: 
@isTest
Public class MERCVerificationServiceBatchTest {
            
            Public static testMethod void test() {
            
            List<genesis__Applications__c> applicationLs = new  List<genesis__Applications__c>();
            genesis__Applications__c gensis= new genesis__Applications__c();
            gensis.Application_Id__c='A12345678912345678';
            gensis.Is_Customer_Interested__c='MERC';
            gensis.Loyalty_Status__c='Loyalty Available';
            gensis.MCM_Authorized__c=false;
            gensis.genesis__Loan_Amount__c=98976;
            applicationLs.add(gensis);
            Insert applicationLs;
            System.debug('genesis__Applications__c===> '+applicationLs); 
            List<genesis__Applications__c> applicationLs1=[Select Application_Id__c,Is_Customer_Interested__c,Loyalty_Status__c,MCM_Authorized__c,genesis__Loan_Amount__c from genesis__Applications__c];
            Test.startTest();
            MERCVerificationServiceBatch MERC = new MERCVerificationServiceBatch();
            Id batchJobId=Database.executeBatch(MERC);
            Test.stopTest();
            }
}