Hi Guys,

Need help in coverage.I have written test class for below batch apex biut was able to achieve only 50% coverage.Pls help me to get 100% coverage.

global class BatchClassexample implements Database.Batchable<sObject> {
    
    global String query = 'SELECT Id,Name FROM Account where name=:filter ';
    global Database.QueryLocator start(Database.BatchableContext BC)
    {
        system.debug('inside methiod----');
        String filter='bBVINES';
        return Database.getQueryLocator(query);
    }
    global void execute(Database.BatchableContext BC, List<Account> scope)
    {
        //User u=[SELECT username from user where profileid='00e28000000sxOR'];
        system.debug('inside method 1---');
        for(Account a : scope)
        {
            a.Name = a.Name + 'By bhuvanBam';
        }
        system.debug(scope);	
        update scope;
        //system.runAs(u){}
    }
    global void finish(Database.BatchableContext BC) {
    }
}


//Test class
@isTest
   public class BatchClassexampleTestClass {
        public static testMethod void testRunAs(){        
        String filter='bBVINES';
        Test.startTest();
        BatchClassexample BC=new BatchClassexample();
         Account a=new Account(name='bBVINES');
            insert a;
            List<Account> alist=[Select name from Account where name like '%bBVINES%'];
            for(Account afor:alist){
               afor.name=afor.name+'Bhuvanbam';
            }
            update alist;
            User u=[SELECT username from user where profileid='00e28000000sxOR'];
           system.runAs(u){} 
            DataBase.executeBatch(BC,200);
           Test.stopTest();
       
        
       } 
          }