I share my kata with bowling score, which was created in Java. It is available to anyone who wants to check it with code.
I am happy about comments.
Class BowlingGameScore {
private int[] pinsKnockedDown = new int[21];
private int currentRoll = 0;
void roll (int pinsKnockedDown) {
this.pinsKnockedDown[currentRoll++] = pinsKnockedDown;
}
int score () {
int total score = 0;
int rollNumber = 0;
for (int frameNumber = 0; frameNumber <10; frameNumber ++) {
int frame score;
if (isSpare (rollNumber)) {
frameScore = 10 + getSpareBonus (rollNumber);
rollNumber + = 2;
} else if (isStrike (pinsKnockedDown[rollNumber])) {
frameScore = 10 + getStrikeBonus (rollNumber);
rollNumber ++;
} else {
frameScore = pinsKnockedDown[rollNumber] + pinsKnockedDown[rollNumber + 1];
rollNumber + = 2;
}
total score + = frame score;
}
return total score;
}
private int getStrikeBonus (int roll) {
return pinsKnockedDown[roll + 1] + pinsKnockedDown[roll + 2];
}
private boolean isStrike (int roll) {
Discard == 10;
}
private int getSpareBonus (int roll) {
return pinsKnockedDown[roll + 2];
}
private boolean isSpare (int roll) {
return pinsKnockedDown[roll] + pinsKnockedDown[roll + 1] == 10;
}}
And his tests:
Class BowlingGameScoreTest {
private bowling game score game;
@BeforeEach
void setUp () {
game = new bowling game score ();
}
@Exam
Empty
game_no_pins_get_hit () {
rollMany (0, 20);
Assertions.assertEquals (0, game.score ());
}
@Exam
Empty
game_just_1_pin_get_hit () {
rollMany (1, 20);
Assertions.assertEquals (20, game.score ());
}
@Exam
Empty
game_with_1_spare () {
rollSpare ();
game.roll (3);
rollMany (0, 17);
Assertions.assertEquals (16, game.score ());
}
@Exam
Empty
game_with_1_strike () {
game.roll (10);
game.roll (3);
game.roll (4);
rollMany (0, 16);
Assertions.assertEquals (24, game.score ());
}
@Exam
Empty
game_of_strikes () {
rollMany (10, 12);
Assertions.assertEquals (300, game.score ());
}
@Exam
Empty
knockdown_nine_and_miss_ten_times () {
int firstRollPinsKnockedDown = 9;
int secondRollPinsKnockedDown = 0;
int repeatTimes = 10;
rollPair (repeatTimes, firstRollPinsKnockedDown, secondRollPinsKnockedDown);
Assertions.assertEquals (90, game.score ());
}
@Exam
Empty
knockdown_five_and_spare_ten_times_and_fice () {
rollPair (10, 5, 5);
game.roll (5);
Assertions.assertEquals (150, game.score ());
}
private void rollPair (int repeatTimes, int firstRollPinsKnockedDown, int secondRollPinsKnockedDown) {
for (int i = 0; i <repeatTimes; i ++) {
game.roll (firstRollPinsKnockedDown);
game.roll (secondRollPinsKnockedDown);
}
}
private void rollSpare () {
game.roll (5);
game.roll (5);
}
private void rollMany (int pins, int times) {
for (int i = 0; i <times; i ++) {
game.roll (pins);
}
}
}
