1  import java.util.Scanner;

  2  

  3  public class StampMachineTester

  4  {

  5     public static void main(String[] args)

  6     {

  7        StampMachine machine = new StampMachine();

  8        machine.insert(1);

  9        System.out.print("First class stamps: "); 

 10        System.out.println(machine.giveFirstClassStamps());

 11        System.out.println("Expected: 2");

 12        System.out.print("Penny stamps: "); 

 13        System.out.println(machine.givePennyStamps());

 14        System.out.println("Expected: 12");

 15     }

 16  }