@isTest(seeAllData = True)
public with sharing class Test_scheduledEmailMessageCleanUp {

 static testMethod void Test_scheduledEmailMessageCleanUp(){
        Test.startTest();
        scheduledEmailMessageCleanUp objScheduler = new scheduledEmailMessageCleanUp();
        SchedulableContext sc=null;
        objScheduler.execute(sc);

        Test.stopTest();
}

}