omin.ju

README.md

@@ -5,3 +5,12 @@
 
 ## 과제 제출 과정
 * [과제 제출 방법](https://github.com/next-step/nextstep-docs/tree/master/ent-precourse)
+
+## 구현할 기능
+* 랜덤 숫자 생성
+  * 길이는 3, 중복 X
+* 숫자 입력 후 랜덤 숫자와 비교
+  * 숫자와 위치가 같으면 스트라이크
+  * 수자는 같은데 위치가 다르면 볼
+  * 모두 맞으면 게임 종료
+* 각 게임이 끝나면 다시하기 s가능

src/main/java/Main.java

@@ -0,0 +1,10 @@
+import game.Game;
+
+public class Main {
+    public static void main(String[] args){
+        Game game = new Game();
+        do {
+            game.start();
+        } while (game.checkGameAgain());
+    }
+}

src/main/java/console/Console.java

@@ -0,0 +1,47 @@
+package console;
+
+import game.Score;
+
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class Console {
+
+    private static final String ASK_GAME_AGAIN = "게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.";
+    private static final String INPUT_NUMBER = "숫자를 입력해주세요 : ";
+    private static final String GAME_END = "3개의 숫자를 모두 맞히셨습니다! 게임 종료";
+    private final Scanner scanner;
+
+    public Console() {
+        this.scanner = new Scanner(System.in);
+    }
+
+    public int getGameMenu(){
+        System.out.println(ASK_GAME_AGAIN);
+        return scanner.nextInt();
+    }
+
+    public ArrayList<Integer> getPlayerAnswer(){
+        System.out.println(INPUT_NUMBER);
+        ArrayList<Integer> playerAnswer = new ArrayList<>();
+        String input = scanner.next();
+        String[] splitNumber = input.split("");
+        for(int idx = 0; idx < 3; idx++){
+            playerAnswer.add(Integer.parseInt(splitNumber[idx]));
+        }
+        return playerAnswer;
+    }
+
+    public void printScore(Score score){
+        if (score.getStrike() != 0)
+            System.out.println(String.format("%d 스트라이크", score.getStrike()));
+        if (score.getBall() != 0)
+            System.out.println(String.format("%d 볼", score.getBall()));
+        if (score.getStrike() == 0 && score.getBall() == 0)
+            System.out.println("낫싱");
+    }
+
+    public void printGameEnd(){
+        System.out.println(GAME_END);
+    }
+}

src/main/java/console/Menu.java

@@ -0,0 +1,16 @@
+package console;
+
+public enum Menu {
+    DO_GAME(1),
+    EXIT_GAME(2);
+
+    private final int menuNumber;
+
+    Menu(int menuNumber) {
+        this.menuNumber = menuNumber;
+    }
+
+    public static boolean isDoGame(int menuNumber) {
+        return DO_GAME.menuNumber == menuNumber;
+    }
+}

src/main/java/game/Game.java

@@ -0,0 +1,70 @@
+package game;
+
+
+import console.Console;
+import console.Menu;
+
+import java.util.ArrayList;
+import java.util.Collections;
+
+public class Game {
+
+    private final Console console;
+    private ArrayList<Integer> answer;
+
+    public Game() {
+        this.console = new Console();
+        answer = new ArrayList<>(3);
+    }
+
+    public void start(){
+        makeRandomNumber();
+        while(true) {
+            ArrayList<Integer> playerAnswer = console.getPlayerAnswer();
+            Score score = new Score(0, 0);
+            setScore(playerAnswer, score);
+            console.printScore(score);
+            if (score.getStrike() == 3)
+                break;
+        }
+        console.printGameEnd();
+    }
+
+    private void setScore(ArrayList<Integer> playerAnswer, Score score) {
+        setStrikeCount(playerAnswer, score);
+        for (int idx = 0; idx < 3; idx++) {
+            setBallCount(playerAnswer, score, idx);
+        }
+    }
+
+    private void setBallCount(ArrayList<Integer> playerAnswer, Score score, int idx){
+        for (int compIdx = 0; compIdx < 3; compIdx++){
+            if (compIdx != idx && answer.get(compIdx) == playerAnswer.get(idx))
+                score.plusBall();
+        }
+    }
+
+    private void setStrikeCount(ArrayList<Integer> playerAnswer, Score score){
+        for (int idx = 0; idx < 3; idx++){
+            if (answer.get(idx) == playerAnswer.get(idx)) {
+                score.plusStrike();
+            }
+        }
+    }
+
+    private void makeRandomNumber() {
+        answer.clear();
+        ArrayList<Integer> numbers = new ArrayList<>();
+        for (int i = 1; i <= 9; i++) {
+            numbers.add(i);
+        }
+        Collections.shuffle(numbers);
+        for (int idx = 0; idx < 3; idx++) {
+            answer.add(numbers.get(idx));
+        }
+    }
+
+    public boolean checkGameAgain(){
+        return Menu.isDoGame(console.getGameMenu());
+    }
+}

src/main/java/game/Score.java

@@ -0,0 +1,27 @@
+package game;
+
+public class Score {
+    private int ball;
+    private int strike;
+
+    public Score(int ball, int strike) {
+        this.ball = ball;
+        this.strike = strike;
+    }
+
+    public int getBall() {
+        return ball;
+    }
+
+    public void plusBall() {
+        this.ball++;
+    }
+
+    public int getStrike() {
+        return strike;
+    }
+
+    public void plusStrike() {
+        this.strike++;
+    }
+}

src/test/java/game/GameTest.java

@@ -0,0 +1,42 @@
+package game;
+
+import org.junit.jupiter.api.Test;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class GameTest {
+
+    Game game = new Game();
+
+    @Test
+    void testRandomNumberSizeIs3() throws Exception {
+        Method method = Game.class.getDeclaredMethod("makeRandomNumber");
+        method.setAccessible(true);
+        Field field = Game.class.getDeclaredField("answer");
+        field.setAccessible(true);
+
+        ArrayList<Integer> array = (ArrayList<Integer>)field.get(game);
+        method.invoke(game);
+        assertThat(array.size()).isEqualTo(3);
+    }
+
+    @Test
+    void testRandomNumberIsNotDuplicated() throws Exception {
+        Method method = Game.class.getDeclaredMethod("makeRandomNumber");
+        method.setAccessible(true);
+        Field field = Game.class.getDeclaredField("answer");
+        field.setAccessible(true);
+
+        ArrayList<Integer> array = (ArrayList<Integer>)field.get(game);
+        method.invoke(game);
+
+        Set<Integer> set = new HashSet<>(array);
+        assertThat(set.size()).isEqualTo(array.size());
+    }
+}