Turn.java

// the turn that is handed to player so that it can play
class Turn implements ITurn {

    SPlayer player; 
    Die d;
    Action actionTaken;

    Turn(SPlayer player, Die d) {
		this.player = player; 
		this.d = d;
    }

    public static enum Action {
        ROLL,
        SKIP,
        HOLD,
        ROLLTWICE
    }

    // ------------------------------------------------------------------
    private boolean turnTaken = false;

    // check whether the player already performed an action 
    // effect: set done
    private void okayP() {
		if (turnTaken)
			player.cheat(); 
		turnTaken = true; 
    }

    public int roll() {
		okayP();

        actionTaken = Action.ROLL;

		int result = d.throw_die(); 
		player.record(result);
		return result;
    }

    public void skip() {
		okayP();
        actionTaken = Action.SKIP;
    }

    public void hold() {
        okayP();
        actionTaken = Action.HOLD;

        player.done = true;
    }

    public int rollTwice() {
        okayP();
        actionTaken = Action.ROLLTWICE;

        int result = d.throw_die() + d.throw_die();
        player.record(result);
        return result;
    }

    // ------------------------------------------------------------------
    // Examples: 

    // ------------------------------------------------------------------
    // Examples: 

    static MPlayer m1;
    static SPlayer s1;
    static Turn t1; 
    static Turn t2; 

    public static void createExamples() {
		if (m1 == null) {
			m1 = new MPlayer("test1");    
			s1 = new SPlayer(m1);         
			t1 = new Turn(s1, new Die()); 
			t2 = new Turn(s1, new Die());
		}
    }

    // ------------------------------------------------------------------
    // Tests: 

    public static void main(String argv[]) {
		SPlayer s1 = t1.player;
		m1.registerDisplay(TestIDisplay.testIDisplay); 

		int r1 = t1.roll(); 
		Tester.check(1 <= r1 && r1 <= 6,"roll 1"); 
		Tester.check(r1 == s1.sum,"roll 2"); 
    }
}