// tests for the phone list classes
public class IPhListTest { 
  public IPhListTest () {}
  
  // Setup:
    // Phone entries:
    PhEntry wendy = new PhEntry("wendy", 1234); 
    PhEntry dan = new PhEntry("dan", 8768); 
    PhEntry pat = new PhEntry("pat", 6389); 
    PhEntry matt = new PhEntry("matt", 7999); 
    PhEntry judy = new PhEntry("judy", 1833); 
    PhEntry erna = new PhEntry("erna", 3325); 

    // Phone lists:
    IPhList mt = new MtPhList(); 
    IPhList mattlist = new ConsPhList(wendy, 
        new ConsPhList(dan, 
            new ConsPhList(pat,mt))); 
    IPhList danlist = new ConsPhList(matt, 
        new ConsPhList(judy, 
            new ConsPhList(erna,mt))); 
    IPhList roblist = new ConsPhList(wendy, 
        new ConsPhList(pat, 
            new ConsPhList(matt,mt))); 
 

  // run the tests and report the results
  public void runTests(){ 
 
    // changeNum 
    System.out.println("\nOriginal record for Wendy: \n" + wendy);
    System.out.println("\nA list that contains Wendy: \n" + mattlist);
    System.out.println("\nAnother list that contains Wendy: \n" + roblist);
       
    PhEntry wendy2 = wendy.changeNum(4321); 
    System.out.println("\nChanged record for Wendy: " + wendy2);
    System.out.println("\nA list that contains Wendy did not change: \n" + mattlist);
    System.out.println("\nAnother list that contains Wendy did not change: \n" + roblist);
  
    wendy.changeNum2(5555);
    System.out.println("\nChanged record for Wendy using mutation: " + wendy);
    System.out.println("\nA list that contains Wendy did change: \n" + mattlist);
    System.out.println("\nAnother list that contains Wendy did change: \n" + roblist);
    
    // test code: (this only illustrates what the test should check)
    System.out.println("\nTest wendy's phone number:\n"); 
    System.out.println("\nCurrent record: " + wendy);
    System.out.println("\nshould be:      " + (new PhEntry("wendy", 5555)));
 } 
  
  public static void main(String[] argv){ 
    IPhListTest phlt = new IPhListTest(); 
    phlt.runTests(); 
  } 
}