[그리디] 이고은 자동차 경주 미션 1,2 단계 제출합니다.

README.md

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+# 자동차 경주
+
+## 설명
+1. 자동차 이름 입력받기
+2. 4이상-> 전진, 4미만->멈춤
+
+## 조건
+1. indent(인덴트, 들여쓰기) depth를 2를 넘지 않도록
+2. 3항 연산자, else, switch/case 모두 금지
+3. 함수(메서드) 길이 15라인 넘지 않도록
+4. 함수가 한 가지 일만 할 수 있게

src/main/java/.gitkeep

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+

src/main/java/Car.java

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+public class Car {
+    private static final int MOVE_THRESHOLD = 4;
+
+   private String name;
+   private int position=0;
+
+   public Car(String name){
+         this.name=name;
+   } //자동차 이름 규칙 강제화
+
+    public String getName(){
+            return name;
+    }
+
+    public int getPosition(){
+            return position;
+    }
+
+    public void move(int randomNumber){
+        if(randomNumber>=MOVE_THRESHOLD){
+              position++;
+       }
+    }
+}

src/main/java/Cars.java

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+import java.util.List;
+
+public class Cars {
+    private final List<Car> cars;
+
+    public Cars(List<Car> carList) {
+        this.cars = carList;
+    }
+
+    public StringBuilder findWinnerNames() {
+        int maxPosition = findMaxPosition();
+        return buildWinnerNames(maxPosition);
+    }
+
+    private int findMaxPosition() {
+        int maxPosition = 0;
+        for (Car car : cars) {
+            maxPosition = Math.max(maxPosition, car.getPosition());
+        }
+        return maxPosition;
+    }
+
+    private StringBuilder buildWinnerNames(int maxPosition) {
+        StringBuilder winnerNames = new StringBuilder();
+        for (Car car : cars) {
+            appendWinnerName(car, maxPosition, winnerNames);
+        }
+        return winnerNames;
+    }
+
+    private void appendWinnerName(Car car, int maxPosition, StringBuilder winnerNames) {
+        if (car.getPosition() == maxPosition) {
+            winnerNames.append(car.getName());
+        }
+    }
+
+    public Car[] getCars() {
+        return cars.toArray(new Car[0]);
+    }
+}

src/main/java/MoveCondition.java

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+import java.util.Random;
+
+public class MoveCondition {
+
+    public void randomMove(Car car){
+        Random random = new Random();
+
+        int randomNumber = random.nextInt(10); // 0부터 9까지의 랜덤 숫자 생성
+        System.out.println("랜덤변수 : " + randomNumber);
+        car.move(randomNumber);
+    }
+}

src/main/java/RaceController.java

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+public class RaceController {
+    public void startRace(Cars car, int rounds) {
+        MoveCondition moveCondition = new MoveCondition();
+
+        for (int round = 0; round < rounds; round++) {
+            runRound(car, moveCondition);
+        }
+        System.out.println();
+    }
+
+    private void runRound(Cars cars, MoveCondition moveCondition) {
+        for (Car car : cars.getCars()) {
+            moveCondition.randomMove(car);
+        }
+
+        for (Car car : cars.getCars()) {
+            String dashes = "-".repeat(car.getPosition());
+            System.out.println(car.getName() + " : " + dashes);
+        }
+        System.out.println();
+    }
+}

src/main/java/RaceStart.java

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+import java.util.Scanner;
+import java.util.Arrays;
+
+public class RaceStart {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        int rounds = scanner.nextInt(); //라운드 횟수 입력
+        int n = scanner.nextInt(); // 차 갯수 입력
+        Car[] cars = new Car[n];
+
+        for (int i = 0; i < n; i++) {
+            String name = scanner.next();
+            cars[i] = new Car(name);
+        }
+
+        Cars carsList = new Cars(Arrays.asList(cars));
+
+        RaceController raceController = new RaceController();
+        raceController.startRace(carsList, rounds);
+
+        Winner winner = new Winner();
+        winner.findWinner(carsList);
+
+        scanner.close();
+    }
+}

src/main/java/Winner.java

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+public class Winner {
+
+    public void findWinner(Cars cars) {
+        StringBuilder result = cars.findWinnerNames();
+        System.out.println(result + "가 최종 우승했습니다.");
+    }
+}

src/test/java/TestRace.java

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+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class TestRace {
+
+    @Test
+    @DisplayName("4이상 일때만 전진하는지 확인")
+    void CarMove(){
+        //given
+        Car f1 = new Car("f1");
+        //when
+        f1.move(4);
+        //then
+        assertThat(f1.getPosition()).isEqualTo(1);
+    }
+
+    void CarStop(){
+        //given
+        Car f1 = new Car("f1");
+        //when
+        f1.move(3);
+        //then
+        assertThat(f1.getPosition()).isEqualTo(0);
+    }
+}