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public class Dog {
    
    private static Dog bestInShow = null;
    private String name;
    
    public static void setBestInShow(Dog b) {
	bestInShow = b;
    }
    
    public static Dog getBestInShow() {
	return bestInShow;
    }
    
    public Dog(String name) { this.name = name;}
    
    public static void main(String [] args) {
	
	Dog d1 = new Dog("Ace");
	Dog d2 = new Dog("Buddy");
	Dog d3 = new Dog("Coco");
	Dog d4 = new Dog("Daisy");
	Dog d5 = new Dog("Eddie");
	Dog d6 = d2;   
	
	setBestInShow(d4);       
	d4 = d1;                 
	d2 = d3;                 
	d6 = null;               
	d5 = null;               
	d4 = null;               
	d3 = null;               
	d2 = null;               
	d1 = null;               
	setBestInShow(null);     
    }
}

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import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.junit.Test;


public class LottoPickTest {

    @Test
    public void test_sortNumbers() {
	LottoPick lp = new LottoPick(new int [] {15,2,7,3});
	lp.sortNumbers();
	assertEquals(new LottoPick(new int [] {2,3,7,15}), lp);
    }
	    
    @Test
    public void test_unique_1() {
	LottoPick lp = new LottoPick(new int [] {3,5,3,7});
	assertFalse(lp.unique());
	assertEquals(new LottoPick(new int [] {3,3,5,7}), lp);
    }

    @Test
    public void test_unique_2() {
	LottoPick lp = new LottoPick(new int [] {3,5,2,7});
	assertEquals(new LottoPick(new int [] {3,5,2,7}), lp);	
	assertTrue(lp.unique());
	assertEquals(new LottoPick(new int [] {2,3,5,7}), lp);
    }

    @Test
    public void test_matches_1() {
	LottoPick lp1 = new LottoPick(new int [] {4,15,6,21,9,11});
	LottoPick lp2 = new LottoPick(new int [] {17,6,3,21,13,14});
	assertEquals(2, LottoPick.numMatched(lp1,lp2));
    }
	    
   @Test
    public void test_matches_2() {
	    LottoPick lp1 = new LottoPick(new int [] {3,6,9,12,15,18});
	    LottoPick lp2 = new LottoPick(new int [] {2,4,8,10,14,16});
	    assertEquals(0, LottoPick.numMatched(lp1,lp2));
   }

    @Test
    public void test_matches_3() {
	    LottoPick lp1 = new LottoPick(new int [] {3,6,9,12,15,18});
	    LottoPick lp2 = new LottoPick(lp1); // cheating :-)
	    assertEquals(6, LottoPick.numMatched(lp1,lp2));
    }

}