Refactored code in DeckOfCards class with import Random, Created test class...

Refactored code in DeckOfCards class with import Random, Created test class DeckOfCardsTest, added more javadoc

src/main/java/edu/ntnu/idatt2003/DeckOfCards.java

@@ -3,13 +3,15 @@ package edu.ntnu.idatt2003;
 import java.util.Collections;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Random;
 
 /**
  * En kortstokk bestående av 52 kort.
+
  */
 public class DeckOfCards {
     private final List<PlayingCard> cards = new ArrayList<>();
-
+    private final Random random = new Random();
 
     public DeckOfCards() {
         char[] suits = { 'S', 'H', 'D', 'C' };
@@ -19,10 +21,10 @@ public class DeckOfCards {
             }
         }
     }
-
     /**
      * Blander kortene i kortstokken.
      */
+
     public void shuffle() {
         Collections.shuffle(cards);
     }
@@ -35,17 +37,23 @@ public class DeckOfCards {
      * @throws IllegalArgumentException hvis det ikke er nok kort til å dele ut ønsket antall.
      */
     public List<PlayingCard> dealHand(int n) {
-        if (n > cards.size()) {
-            throw new IllegalArgumentException("Not enough cards in the deck to deal the hand.");
+        if (n < 1 || n > cards.size()) {
+            throw new IllegalArgumentException("Invalid number of cards to deal.");
         }
 
         List<PlayingCard> hand = new ArrayList<>();
         for (int i = 0; i < n; i++) {
-            hand.add(cards.remove(cards.size() - 1));
+            int index = random.nextInt(cards.size());
+            hand.add(cards.remove(index));
         }
         return hand;
     }
 
+    /**
+     * Returnerer antall kort som er igjen i kortstokken.
+     * @return antall kort som er igjen i kortstokken.
+     */
+
     public int cardsLeft() {
         return cards.size();
     }