game.java

import lombok.AllArgsConstructor;
import static java.lang.Math.*;

@AllArgsConstructor
public class Game {
    private Player p1;
    private Player p2;

    private static final int DEUCE_POINT = 3;
    private static final String DEUCE = " Deuce ";
    private static final String[] B4_DEUCE_RESULTS = { " Love ", " Fifteen ", " Thirty ", " Forty " };
    private static final String[] AFTER_DEUCE_RESULTS = { DEUCE, " Advantage ", " Win " };

    public String printResult() {
        if (max(p1.getPoints(), p2.getPoints()) > DEUCE_POINT) {
            return getAfterDeuce().trim();
        }
        if (p1.getPoints() == p2.getPoints()) {
            return getEqualResult(p1.getPoints(), p2.getPoints()).trim();
        }
        return (B4_DEUCE_RESULTS[p1.getPoints()] + ":" + B4_DEUCE_RESULTS[p2.getPoints()]).trim();
    }

    private String getAfterDeuce() {
        String name = p1.getPoints() > p2.getPoints() ? p1.getName() : p2.getName();
        int diff = abs(p1.getPoints() - p2.getPoints());
        return (diff == 0 ? "" : name + " ") + AFTER_DEUCE_RESULTS[min(diff, AFTER_DEUCE_RESULTS.length - 1)];
    }

    private String getEqualResult(int point1, int point2) {
        assert point1 == point2;
        return (point1 >= DEUCE_POINT) ? DEUCE : B4_DEUCE_RESULTS[p1.getPoints()] + " ALL";
    }
}

test.java

package io.aviatar.condax.faulttelex.parser.tennis;

import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class GameTest {
    private Player p1 = new Player("Kai");
    private Player p2 = new Player("Dirk");
    private Game game = new Game(p1, p2);

    @Before
    public void reset() {
        p1.setPoints(0);
        p2.setPoints(0);
    }

    @Test
    public void test_0_0() {

        String r = game.printResult();
        assertEquals("Love  ALL", r);
    }

    @Test
    public void test_0_15() {
        p1.setPoints(0);
        p2.setPoints(1);
        String r = game.printResult();
        assertEquals("Love : Fifteen", r);
    }

    @Test
    public void test_15_15() {
        p1.setPoints(1);
        p2.setPoints(1);
        String r = game.printResult();
        assertEquals("Fifteen  ALL", r);
    }

    @Test
    public void test_15_30() {
        p1.setPoints(1);
        p2.setPoints(2);
        String r = game.printResult();
        assertEquals("Fifteen : Thirty", r);
    }

    @Test
    public void test_40_40() {
        p1.setPoints(3);
        p2.setPoints(3);
        String r = game.printResult();
        assertEquals("Deuce", r);
    }

    @Test
    public void test_40_45() {
        p1.setPoints(3);
        p2.setPoints(4);
        String r = game.printResult();
        assertEquals(p2.getName() + "  Advantage", r);
    }

    @Test
    public void test_45_40() {
        p1.setPoints(4);
        p2.setPoints(3);
        String r = game.printResult();
        assertEquals(p1.getName() + "  Advantage", r);
    }

    @Test
    public void test_x_x_deuce() {
        p1.setPoints(30);
        p2.setPoints(30);
        String r = game.printResult();
        assertEquals("Deuce", r);
    }

    @Test
    public void test_70_50() {
        p1.setPoints(6);
        p2.setPoints(4);
        String r = game.printResult();
        assertEquals(p1.getName() + "  Win", r);
    }

    @Test
    public void test_0_50() {
        p1.setPoints(0);
        p2.setPoints(5);
        String r = game.printResult();
        assertEquals(p2.getName() + "  Win", r);
    }
}