List<MasterCopy__c> masterCopyList = new List<MasterCopy__c>([Select Name,DateUpdate__c, Opening_Balance__c, Closing_Balance__c, Master_Code__c, Master_Name__c from MasterCopy__c]);
    List<MasterCopy__c> upsertMasterList = new List<MasterCopy__c>();
    MasterCopy__c masterCopyInsert;
    List<MasterTest__c> masterTestList = new List<MasterTest__c>([Select Date__c, Opening_Balance__c, Master_Code__c, Name, Closing_Balance__c from MasterTest__c]);
    if(trigger.isBefore && trigger.isInsert  ){
        for(MasterTest__c masterTest : trigger.new){
            masterTest.EntryDate__c = masterTest.Date__c;
            masterTest.To_Date__c = masterTest.Date__c;
            masterTest.From_Date__c = masterTest.Date__c;
            
            
            masterTest.Closing_Balance__c = masterTest.Opening_Balance__c;
        }
    }