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Refactor scoreHand and compareHands into ScoringUtils

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This commit is contained in:
Dave Burke
2022-03-03 21:55:30 -06:00
parent 1f24d98a72
commit f7a257e6ae
4 changed files with 198 additions and 251 deletions
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143
10_Blackjack/java/test/ScoringUtilsTest.java Normal file
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import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.DisplayName;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.util.LinkedList;
public class ScoringUtilsTest {
@Test
@DisplayName("scoreHand should score aces as 1 when using 11 would bust")
public void scoreHandHardAce() {
// Given
LinkedList<Card> hand = new LinkedList<>();
hand.add(new Card(10, Card.Suit.SPADES));
hand.add(new Card(9, Card.Suit.SPADES));
hand.add(new Card(1, Card.Suit.SPADES));
// When
int result = ScoringUtils.scoreHand(hand);
// Then
assertEquals(20, result);
}
@Test
@DisplayName("scoreHand should score 3 aces as 13")
public void scoreHandMultipleAces() {
// Given
LinkedList<Card> hand = new LinkedList<>();
hand.add(new Card(1, Card.Suit.SPADES));
hand.add(new Card(1, Card.Suit.CLUBS));
hand.add(new Card(1, Card.Suit.HEARTS));
// When
int result = ScoringUtils.scoreHand(hand);
// Then
assertEquals(13, result);
}
@Test
@DisplayName("compareHands should return 1 meaning A beat B, 20 to 12")
public void compareHandsAWins() {
LinkedList<Card> handA = new LinkedList<>();
handA.add(new Card(10, Card.Suit.SPADES));
handA.add(new Card(10, Card.Suit.CLUBS));
LinkedList<Card> handB = new LinkedList<>();
handB.add(new Card(1, Card.Suit.SPADES));
handB.add(new Card(1, Card.Suit.CLUBS));
int result = ScoringUtils.compareHands(handA,handB);
assertEquals(1, result);
}
@Test
@DisplayName("compareHands should return -1 meaning B beat A, 18 to 4")
public void compareHandsBwins() {
LinkedList<Card> handA = new LinkedList<>();
handA.add(new Card(2, Card.Suit.SPADES));
handA.add(new Card(2, Card.Suit.CLUBS));
LinkedList<Card> handB = new LinkedList<>();
handB.add(new Card(5, Card.Suit.SPADES));
handB.add(new Card(6, Card.Suit.HEARTS));
handB.add(new Card(7, Card.Suit.CLUBS));
int result = ScoringUtils.compareHands(handA,handB);
assertEquals(-1, result);
}
@Test
@DisplayName("compareHands should return 1 meaning A beat B, natural Blackjack to Blackjack")
public void compareHandsAWinsWithNaturalBlackJack() {
//Hand A wins with natural BlackJack, B with Blackjack
LinkedList<Card> handA = new LinkedList<>();
handA.add(new Card(10, Card.Suit.SPADES));
handA.add(new Card(1, Card.Suit.CLUBS));
LinkedList<Card> handB = new LinkedList<>();
handB.add(new Card(6, Card.Suit.SPADES));
handB.add(new Card(7, Card.Suit.HEARTS));
handB.add(new Card(8, Card.Suit.CLUBS));
int result = ScoringUtils.compareHands(handA,handB);
assertEquals(1, result);
}
@Test
@DisplayName("compareHands should return -1 meaning B beat A, natural Blackjack to Blackjack")
public void compareHandsBWinsWithNaturalBlackJack() {
LinkedList<Card> handA = new LinkedList<>();
handA.add(new Card(6, Card.Suit.SPADES));
handA.add(new Card(7, Card.Suit.HEARTS));
handA.add(new Card(8, Card.Suit.CLUBS));
LinkedList<Card> handB = new LinkedList<>();
handB.add(new Card(10, Card.Suit.SPADES));
handB.add(new Card(1, Card.Suit.CLUBS));
int result = ScoringUtils.compareHands(handA,handB);
assertEquals(-1, result);
}
@Test
@DisplayName("compareHands should return 0, hand A and B tied with a Blackjack")
public void compareHandsTieBothBlackJack() {
LinkedList<Card> handA = new LinkedList<>();
handA.add(new Card(11, Card.Suit.SPADES));
handA.add(new Card(10, Card.Suit.CLUBS));
LinkedList<Card> handB = new LinkedList<>();
handB.add(new Card(10, Card.Suit.SPADES));
handB.add(new Card(11, Card.Suit.CLUBS));
int result = ScoringUtils.compareHands(handA,handB);
assertEquals(0, result);
}
@Test
@DisplayName("compareHands should return 0, hand A and B tie without a Blackjack")
public void compareHandsTieNoBlackJack() {
LinkedList<Card> handA = new LinkedList<>();
handA.add(new Card(10, Card.Suit.DIAMONDS));
handA.add(new Card(10, Card.Suit.HEARTS));
LinkedList<Card> handB = new LinkedList<>();
handB.add(new Card(10, Card.Suit.SPADES));
handB.add(new Card(10, Card.Suit.CLUBS));
int result = ScoringUtils.compareHands(handA,handB);
assertEquals(0, result);
}
}