Hi

I wrote a trigger on opportunity to update a custom field called discount program 
 

trigger NewDiscountProgramUpdate on Opportunity (After Insert, Before Update) 
{
// ******** Trigger Created By Sudhir ************  
// Loop through the incoming records

  list<opportunity> opp = new list<opportunity>();


for (Opportunity o : Trigger.new) {       
    
        
   // Check for Deal Reg Not Null
 if ( o.FORCE_NSP__c == NULL && o.discount_program__c <> 'NSP' && o.Deal_Registration__c <> NULL ) 
   {
     if ( o.Partner_Driven__c == 'Yes'  && o.Partner_Led__c == 'No' && o.K_12__c == 'No'  ) 
      {
        o.discount_program__c = 'DEALREG/PI';
        o.Abbv_Discount_Program__c = 'DR/PI';        
      }
     else if ( o.Partner_Driven__c == 'No'  && o.Partner_Led__c == 'Yes' && o.K_12__c == 'No'  ) 
     {
        o.discount_program__c = 'DEALREG/PL';
        o.Abbv_Discount_Program__c = 'DR/PL';    
     }
     else if ( o.Partner_Driven__c == 'Yes'  && o.Partner_Led__c == 'Yes' && o.K_12__c == 'No'  ) 
     {
       o.discount_program__c = 'DEALREG/PI/PL';
       o.Abbv_Discount_Program__c = 'DR/PI/PL';  
     }
     else if ( o.Partner_Driven__c == 'No'  && o.Partner_Led__c == 'No' && o.K_12__c == 'Yes' ) 
     {
       o.discount_program__c = 'DEALREG/K-12';
       o.Abbv_Discount_Program__c = 'DR/K12';    
     }
     else if ( o.Partner_Driven__c == 'Yes'  && o.Partner_Led__c == 'No' && o.K_12__c == 'Yes' )
     {
       o.discount_program__c = 'DEALREG/PI/K-12';
       o.Abbv_Discount_Program__c = 'DR/PI/K12';    
     }
     else if (   o.Partner_Driven__c == 'No'  && o.Partner_Led__c == 'Yes' && o.K_12__c == 'Yes'  )
     {
       o.discount_program__c = 'DEALREG/PL/K-12';
       o.Abbv_Discount_Program__c = 'DR/PL/K12';   
     }
     else if ( o.Partner_Driven__c == 'Yes'  && o.Partner_Led__c == 'Yes' && o.K_12__c == 'Yes' )
     {
       o.discount_program__c = 'DEALREG/PI/PL/K-12';
       o.Abbv_Discount_Program__c = 'DR/PI/PL/K12';   
     }
    else  
     {
     o.discount_program__c = 'DEALREG';
     o.Abbv_Discount_Program__c = 'DR';     
     } 
    }
     opp.add(o);
 }   
     
 
}

For the above trigger I wrote a test class to get code coverage its showing only 14% Please suggest me how to get more code coverage please suggest me how to modify the code
 

@isTest(SeeAllData = true)
private class   Test_Insert_Opp {

    public static testmethod void testopp()
    {    
      
 test.startTest();

Opportunity opp = new Opportunity (Name='Test Opp', closeDate=system.today(),recordtypeId = '0123000000094yH',
                                    accountId = '0013000000DULXG',ForecastCategoryName = 'Pipeline',Government_Contract__c = 'None',
                                    StageName ='Renewal',Type='Existing Customer',Pricebook2Id='01s60000000AKxZAAW',
                                    Primary_Competitor__c = 'No Competitor', LeadSource='Renewal', 
                                    ownerid='00560000001vfE5AAI',Channel_Source__c='Distributor',Discount_Program__c='NSP'
                                    ); 
                                     
        insert opp;

 test.stopTest();

} 

}

Thanks
Sudhir