Hi All,

I have the following trigger

trigger upsertmanagername on RMG_Employee_Allocation__c (after update)
{
   List<RMG_Employee_Master__c> opps = new List<RMG_Employee_Master__c>();
   List<ID> masterIds = new List<ID>();
   Map<ID, String> childDetailMap = new Map<ID, String>();
  
   for(RMG_Employee_Allocation__c c: Trigger.new)
    {
      masterIds.add(c.RMG_Employee_Code__c);
      childDetailMap.put(c.RMG_Employee_Code__c, (c.Manager_Name__c));
    }
 
   opps = [select id, Current_Manager__c from RMG_Employee_Master__c where id in :masterIds];
  
   for(RMG_Employee_Master__c rem: opps)
    {
      rem.Current_Manager__c = childDetailMap.get(rem.id);
      Update rem;
    }
  
   if(opps.size() > 0)
      Update opps;
}

And i have the following Apex Test class that has 100 % code covered in sandbox. But when i try deploying it to production i get an error: "Code coverage is 0% atleast 1% code coverage is required"

@isTest
private class Testupsertmanagername
{

   static testMethod void testTrigger()
   {
   RMG_Employee_Master__c rmg = new RMG_Employee_Master__c(Name='Test');
      insert rmg;
     
      RMG_Employee_Allocation__c rmgallo = new RMG_Employee_Allocation__c(
                                     Name='Test', Manager_Name__c='Unit Test',
                                     RMG_Employee_Code__c=rmg.id);
      insert rmgallo;
      update rmgallo;
     
      RMG_Employee_Master__c newrmg=[select Name, Current_Manager__c from RMG_Employee_Master__c where id = :rmgallo.id];
      System.assertEquals('Unit Test', newrmg.Current_Manager__c);
      }
      }

Please help