Question

in java

Write a test class with two unit tests that test different cases for the hasSeq() function described below:

class Hand {

    // Add Card to Hand
    public void add(Card card);

    // Returns true if hand has 3 Card’s of consecutive ranks of the same suit

    // “consecutive” would mean something like 9, 10 and 11
     public boolean hasSeq();

}

class Card {

    // return suit of card: Spades, Hearts, Diamonds or Clubs

    public String suit();

    // return rank of card: rank of 2-10 is just the number,

    // 11 for Jack, 12 for Queen, 13 for King, 14 for Ace

    public int rank();

}

class TestHand { // Your test code goes here

Answer 1

1.

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

class Hand {
        private List<Card> handCardList = new ArrayList<>();
    // Add Card to Hand
    public void add(Card card) {
        this.handCardList.add(card);
    }
    
    // Returns true if hand has 3 Card’s of consecutive ranks of the same suit
    // “consecutive” would mean something like 9, 10 and 11
     public boolean hasSeq() {
         Collections.sort(handCardList);
         for(int i = 0 ; i < handCardList.size() -2 ; i++) {
                         if(handCardList.get(i).suit().equals(handCardList.get(i+1).suit()) && 
                                 handCardList.get(i).suit().equals(handCardList.get(i+2).suit()) &&
                                 (handCardList.get(i+1).rank() == (handCardList.get(i).rank()+1)) &&
                                                (handCardList.get(i+2).rank() == (handCardList.get(i).rank()+2))) {
                         return true;
                         }
                 }
         
         return false;
     }
}

2.

class Card implements Comparable<Card>{
        private String suit;
        
        private int rank;
        
        public Card(String suit,int rank) {
                this.suit = suit;
                this.rank = rank;
        }
        
    // return suit of card: Spades, Hearts, Diamonds or Clubs
    public String suit() {
                return this.suit;
        }
    // return rank of card: rank of 2-10 is just the number,
    // 11 for Jack, 12 for Queen, 13 for King, 14 for Ace
    public int rank() {
        return this.rank;
    }
    
    @Override
    public int compareTo(Card card) {
        if (this.suit == card.suit) {
            return Integer.valueOf(this.rank).compareTo(Integer.valueOf(card.rank));
        } else {
            return card.rank - card.rank;
        }
    }
}

3.

class TestHand { // Your test code goes here
        
        public static void main(String args[]) {
                TestHand testHand = new TestHand();
                testHand.testHandHasSeqTrue();
                testHand.testHandHasSeqFalse();
                
        }
        
        public void testHandHasSeqTrue() {
                Hand hand = new Hand();
                Card card1 = new Card("Spade",2);
                Card card2 = new Card("Spade",3);
                Card card3 = new Card("Spade",4);
                hand.add(card1);
                hand.add(card3);
                hand.add(card2);
                boolean result = hand.hasSeq();
                System.out.println("UnitTest Case 1 Hand hasSeq returning true :" + result);
        }
        
        public void testHandHasSeqFalse() {
                Hand hand = new Hand();
                Card card1 = new Card("Spade",1);
                Card card2 = new Card("Spade",5);
                Card card3 = new Card("Spade",6);
                hand.add(card1);
                hand.add(card3);
                hand.add(card2);
                boolean result = hand.hasSeq();
                System.out.println("UnitTest Case 2 Hand hasSeq returning false :" + result);
        }
}