Add oving 5

src/test/java/oving5/card/CardPredicateTest.java

@@ -0,0 +1,63 @@
+package oving5.card;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import java.util.List;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+public class CardPredicateTest {
+
+	private CardDeck deck;
+
+	@BeforeEach
+	public void setUp() {
+		deck = new CardDeck(10);
+	}
+
+	@Test
+	@DisplayName("Check that hasCard() works as expected")
+	public void testHasCard() {
+		assertThrows(IllegalArgumentException.class, () -> {
+			deck.hasCard(null);
+		}, "Predicate cannot be null");
+
+		assertTrue(deck.hasCard(c -> c.getSuit() == 'S'));
+		assertFalse(deck.hasCard(c -> c.getFace() == 13));
+		assertTrue(deck.hasCard(c -> c.getSuit() == 'S' && c.getFace() == 8));
+	}
+
+	@Test
+	@DisplayName("Check that getCardCount() works as expected")
+	public void testGetCardCount() {
+		assertThrows(IllegalArgumentException.class, () -> {
+			deck.getCardCount(null);
+		}, "Predicate cannot be null");
+
+		assertEquals(10, deck.getCardCount(c -> c.getSuit() == 'S'));
+		assertEquals(4, deck.getCardCount(c -> c.getFace() == 4));
+		assertEquals(1, deck.getCardCount(c -> c.getFace() == 4 && c.getSuit() == 'H'));
+	}
+
+	@Test
+	@DisplayName("Check that getCards() works as expected")
+	public void testGetCards() {
+		assertThrows(IllegalArgumentException.class, () -> {
+			deck.getCards(null);
+		}, "Predicate cannot be null");
+
+		Card card = new Card('S', 4);
+		Card card2 = new Card('S', 5);
+		List<Card> matching = List.of(card, card2);
+		assertEquals(matching.size(),
+				deck.getCards(c -> (c.getFace() == 4 || c.getFace() == 5) && c.getSuit() == 'S')
+						.size(),
+				"getCards should have returned two cards that were spades and had the numbers 4 "
+						+ "or 5");
+		assertEquals(10, deck.getCards(c -> c.getSuit() == 'S').size(),
+				"getCards should have returned 10 cards of the spades suit");
+	}
+}