import tester.*;
@Example //declares this class to be an example class
class Song {
  String title;
  String artist;
  int duration;
  int rating;
  boolean released;
  
  public Song(){
    this.title = "Nothing";
    this.artist = "No One";
    this.duration = 0;
    this.rating = 0;
    this.released = false;
  }
  
  public Song(String title, String artist, int dur, int rate, boolean released){
    this.title = title;
    this.artist = artist;
    this.duration = dur;
    this.rating = rate;
    this.released = released;
  }
  
  //change the title of this Song
  public void changeName(String title){
    this.title = title;
  }
  
  //calculate the cost of this song
  public int cost(){
    if(this.released){
      return 2 * this.rating; 
    }
    return 0;
  }
  
  //will be run as a test
  @TestMethod
  public void doSomeStuff(Tester t){
    t.checkExpect(true, "hahaha");
  }
  
  //will also be run as a test
  public void testCost(Tester t){
    if(this.released){
      t.checkExpect(this.cost(), 2 * this.rating, "TestCost");
    } else{
      t.checkExpect(this.cost(), 0, "TestCost");
    }
  }

  //also run as a test
  public void tests(Tester abc) {
    testCost(abc);
  }
}