gray.ts

README.md

@@ -5,3 +5,17 @@
 
 ## 과제 제출 과정
 * [과제 제출 방법](https://github.com/next-step/nextstep-docs/tree/master/ent-precourse)
+
+## 기능 구현 list
+* [x] 랜덤 숫자 생성
+* [x] 숫자 입력받기
+* [x] 스트라이크, 볼 등 결과 계산 후 출력
+* [x] 숫자를 맞췄을 경우 종료 또는 재시작
+* [x] 기능 테스트
+
+## 기타 요구사항
+* indent depth가 2를 넘기지 않기
+* stream api를 사용하지 않기
+* `else` 예약어 사용하지 않기
+* 함수(또는 메소드)가 10라인을 넘기지 않기
+

src/main/java/Application.java

@@ -0,0 +1,6 @@
+public class Application {
+    public static void main(String[] args) {
+        BaseballGame game = new BaseballGame();
+        game.start();
+    }
+}

src/main/java/BaseballGame.java

@@ -0,0 +1,97 @@
+import java.util.Random;
+import java.util.Scanner;
+
+
+class BaseballGame {
+    private String answerNumber;
+    private final int numberLength;
+    private final Scanner sc;
+    private final Random random;
+    private GameStatus gameStatus;
+
+    BaseballGame() {
+        numberLength = 3;
+        sc = new Scanner(System.in);
+        random = new Random();
+        gameStatus = GameStatus.IN_GAME;
+    }
+
+    void start() {
+        while (gameStatus == GameStatus.IN_GAME) {
+            setRandomNumber();
+            guessNumber();
+            System.out.println("3개의 숫자를 모두 맞히셨습니다! 게임 종료");
+            System.out.println("게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.");
+            handleMenuSelect();
+        }
+    }
+
+    void setRandomNumber() {
+        char[] numbers = {'1', '2', '3', '4', '5', '6', '7', '8', '9'};
+        char[] results = new char[numberLength];
+        for (int i = 0; i < numberLength; i++) {
+            int j = random.nextInt(9 - i);
+            results[i] = numbers[j];
+            swap(numbers, j, 8 - i);
+        }
+        answerNumber = new String(results);
+    }
+
+    // for test
+    void setSpecificNumber(String number) {
+        answerNumber = number;
+    }
+
+    private void guessNumber() {
+        Result result;
+        do {
+            System.out.print("숫자를 입력해주세요 : ");
+            String submitNumber = sc.next();
+            result = getResult(submitNumber);
+            System.out.println(result.resultString());
+        } while (!result.isCorrect());
+    }
+
+    Result getResult(String submitNumber) {
+        return new Result(answerNumber, submitNumber);
+    }
+
+    private void handleMenuSelect() {
+        MenuItem menu;
+        do {
+            menu = getMenuItem();
+        } while (menu == MenuItem.WRONG_INPUT);
+        if (menu == MenuItem.EXIT) {
+            gameStatus = GameStatus.TERMINATED;
+        }
+    }
+
+    private MenuItem getMenuItem() {
+        String menuNumber = sc.next();
+        if (menuNumber.equals("1")) {
+            return MenuItem.START;
+        } else if (menuNumber.equals("2")) {
+            return MenuItem.EXIT;
+        }
+        return MenuItem.WRONG_INPUT;
+    }
+
+    private void swap(char[] arr, int i, int j) {
+        char temp = arr[i];
+        arr[i] = arr[j];
+        arr[j] = temp;
+    }
+}
+
+
+enum GameStatus {
+    IN_GAME,
+    TERMINATED,
+}
+
+
+enum MenuItem {
+    START,
+    EXIT,
+    WRONG_INPUT,
+}

src/main/java/Result.java

@@ -0,0 +1,58 @@
+class Result {
+    int strike;
+    int ball;
+    int numberLength;
+
+    Result(String answerNumber, String submitNumber) {
+        numberLength = answerNumber.length();
+        for (int i = 0; i < numberLength; i++) {
+            checkIndex(answerNumber, submitNumber.charAt(i), i);
+        }
+    }
+
+    private void checkIndex(String answerNumber, char n, int idx) {
+        if (answerNumber.charAt(idx) == n) {
+            addStrike();
+        }
+        else if (answerNumber.indexOf(n) != -1) {
+            addBall();
+        }
+    }
+
+    void addStrike() {
+        strike += 1;
+    }
+
+    void addBall() {
+        ball += 1;
+    }
+
+    boolean isNothing() {
+        return strike == 0 && ball == 0;
+    }
+
+    boolean isCorrect() {
+        return strike == numberLength;
+    }
+
+    String strikeString() {
+        if (strike == 0) {
+            return "";
+        }
+        return String.format("%d 스트라이크 ", strike);
+    }
+
+    String ballString() {
+        if (ball == 0) {
+            return "";
+        }
+        return String.format("%d볼", ball);
+    }
+
+    String resultString() {
+        if (isNothing()) {
+            return "낫싱";
+        }
+        return strikeString() + ballString();
+    }
+}

src/test/java/JudgeTest.java

@@ -0,0 +1,54 @@
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+
+public class JudgeTest {
+    BaseballGame game;
+
+    JudgeTest() {
+        game = new BaseballGame();
+        game.setSpecificNumber("836");
+    }
+
+    @Test
+    @DisplayName("Test: 1 Strike")
+    void oneStrikeTest() {
+        Result result = game.getResult("132");
+        assertThat(result.strike == 1 && result.ball == 0)
+                .isTrue();
+    }
+
+    @Test
+    @DisplayName("Test: 1 Ball")
+    void oneBallTest() {
+        Result result = game.getResult("123");
+        assertThat(result.strike == 0 && result.ball == 1)
+                .isTrue();
+    }
+
+    @Test
+    @DisplayName("Test: 1 Strike 1 Ball")
+    void oneStrikeOneBallTest() {
+        Result result = game.getResult("823");
+        assertThat(result.strike == 1 && result.ball == 1)
+                .isTrue();
+    }
+
+    @Test
+    @DisplayName("Test: Nothing")
+    void nothingTest() {
+        Result result = game.getResult("124");
+        assertThat(result.isNothing())
+                .isTrue();
+    }
+
+    @Test
+    @DisplayName("Test: Correct answer")
+    void correctTest() {
+        Result result = game.getResult("836");
+        assertThat(result.isCorrect())
+                .isTrue();
+    }
+}