feat: testing if popFromDeck throws in case of empty deck

src/test/java/hepia/DeckTest.java

@@ -17,4 +17,16 @@ public class DeckTest {
         int nbCards = 32; // valid number of cards for creating a deck of cards
         assertDoesNotThrow(() -> new Deck(nbCards));
     }
+
+    @Test
+    public void poppingFromEmptyDeck() {
+        int nbCards = 32;
+        Deck deck = new Deck(nbCards);
+
+        for (int i = 0; i < nbCards; i++) {
+            deck.removeFromDeck();
+        }
+
+        assertThrows(RuntimeException.class, deck::removeFromDeck);
+    }
 }

src/test/java/hepia/GameManagerTest.java

+package hepia;
+
+public class GameManagerTest {
+}