Add oving 4

src/test/java/oving4/card/CardDeckTest.java

@@ -0,0 +1,59 @@
+package oving4.card;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+public class CardDeckTest {
+
+	private CardDeck cardDeck;
+
+	private static void checkDeck(CardDeck deck, String deckAsString) {
+		String[] toStrings = deckAsString.split(",");
+		assertEquals(toStrings.length, deck.getCardCount(),
+				"CardDeck does not have the correct size");
+
+		int i = 0;
+
+		for (String toString : toStrings) {
+			Card card = deck.getCard(i);
+			String cardString = String.valueOf(card.getSuit()) + card.getFace();
+			assertEquals(toString, cardString,
+					String.format("Card at position %d was incorrect. CardDeck should have been %s",
+							i + 1, toStrings));
+			i++;
+		}
+	}
+
+	@BeforeEach
+	public void setUp() {
+		cardDeck = new CardDeck(2);
+	}
+
+	@Test
+	@DisplayName("Check that CardDeck is initialized to S1,S2,H1,H2,D1,D2,C1,C2")
+	public void testConstructor() {
+		CardDeckTest.checkDeck(cardDeck, "S1,S2,H1,H2,D1,D2,C1,C2");
+	}
+
+	@Test
+	@DisplayName("Check that CardDeck is shuffled to S1,D1,S2,D2,H1,C1,H2,C2")
+	public void testShufflePerfectly() {
+		cardDeck.shufflePerfectly();
+		CardDeckTest.checkDeck(cardDeck, "S1,D1,S2,D2,H1,C1,H2,C2");
+	}
+
+	@Test
+	@DisplayName("Check that deal gives out the last three cards")
+	public void testDeal() {
+		CardHand hand = new CardHand();
+		cardDeck.deal(hand, 3);
+		CardDeckTest.checkDeck(cardDeck, "S1,S2,H1,H2,D1");
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			cardDeck.deal(null, 1);
+		}, "Cannot deal to null");
+	}
+}