[LBP] 박세은 자동차 미션 1-3단계 제출합니다.

src/main/java/Car.java

@@ -0,0 +1,26 @@
+import java.util.Random;
+
+public class Car {
+    private int position = 0;
+    private String carName;
+
+    public Car(String carName) {
+        this.carName = carName;
+    }
+
+    public void tryMove() {
+        Random rand = new Random();
+        if (rand.nextInt(10) > 3) {
+            this.position++;
+        }
+    }
+
+    public int getPosition() {
+        return position;
+    }
+
+    public String getCarName() {
+        return carName;
+    }
+
+}

src/main/java/CarRace.java

@@ -0,0 +1,52 @@
+import java.util.*;
+import java.util.stream.Collectors;
+
+public class CarRace {
+    private final List<Car> cars = new ArrayList<>();
+    private List<String> carNames;
+    private int raceAttemptCount;
+    private List<String> winnerCarNames;
+    private final CarRaceResultPrinter printer = new CarRaceResultPrinter();
+
+    public void initializeRace() {
+        carNames = CarRaceInputHandler.getCarNames();
+        raceAttemptCount = CarRaceInputHandler.getRaceAttemptCount();
+        makeCarObjects();
+    }
+
+    private void makeCarObjects() {
+        for (String name : carNames) {
+            cars.add(new Car(name));
+        }
+    }
+
+    public void startRace() {
+        for (int i = 0; i < raceAttemptCount; i++) {
+            moveCars();
+            printer.printRaceResult(cars);
+        }
+        determineWinners();
+        printer.printWinnerCarNames(winnerCarNames);
+    }
+
+    private void moveCars() {
+        for (Car car : cars) {
+            car.tryMove();
+        }
+    }
+
+    private int getMaxPosition() {
+        return cars.stream()
+                .mapToInt(Car::getPosition)
+                .max()
+                .orElseThrow(NoSuchElementException::new);
+    }
+
+    private void determineWinners() {
+        winnerCarNames = cars.stream()
+                .filter(car -> car.getPosition() == getMaxPosition())
+                .map(Car::getCarName)
+                .collect(Collectors.toUnmodifiableList());
+    }
+
+}

src/main/java/CarRaceInputHandler.java

@@ -0,0 +1,41 @@
+import java.util.Arrays;
+import java.util.List;
+import java.util.Scanner;
+import java.util.stream.Collectors;
+
+public class CarRaceInputHandler {
+    private static final int MAX_CAR_NAME_LENGTH = 5;
+
+    public static List<String> getCarNames() {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("경주할 자동차 이름을 입력하세요(이름은 쉼표(,)를 기준으로 구분).");
+        String value = scanner.nextLine();
+
+        if (value.isEmpty()) {
+            throw new IllegalArgumentException("경주할 자동차 이름을 반드시 입력해주세요.");
+        }
+
+        List<String> carNames = Arrays.stream(value.split(","))
+                .map(String::trim)
+                .filter(name -> !name.isEmpty())
+                .distinct()
+                .collect(Collectors.toList());
+
+        if (carNames.isEmpty()) {
+            throw new IllegalArgumentException("경주할 자동차 이름을 올바르게 입력해주세요.");
+        }
+
+        if (carNames.stream().anyMatch(name -> name.length() > MAX_CAR_NAME_LENGTH)) {
+            throw new IllegalArgumentException("자동차 이름은 5글자 이하로 작성해주세요.");
+        }
+
+        return carNames;
+    }
+
+    public static int getRaceAttemptCount() {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("시도할 회수는 몇회인가요?");
+        return scanner.nextInt();
+    }
+
+}

src/main/java/CarRaceResultPrinter.java

@@ -0,0 +1,17 @@
+import java.util.List;
+
+public class CarRaceResultPrinter {
+    public void printRaceResult(List<Car> cars) {
+        for (Car car : cars) {
+            System.out.println(car.getCarName() + " : " + "-".repeat(car.getPosition()));
+        }
+        System.out.println();
+    }
+
+    public void printWinnerCarNames(List<String> winnerCarNames) {
+        System.out.println("실행 결과");
+        System.out.print(String.join(", ", winnerCarNames));
+        System.out.println("가 최종 우승했습니다.");
+    }
+
+}

src/main/java/Main.java

@@ -0,0 +1,8 @@
+public class Main {
+    public static void main(String[] args) {
+        CarRace carRace = new CarRace();
+        carRace.initializeRace();
+        carRace.startRace();
+    }
+
+}

src/test/java/CarRaceTest.java

@@ -0,0 +1,34 @@
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import java.util.ArrayList;
+import java.util.Arrays;
+import static org.assertj.core.api.AssertionsForClassTypes.assertThatCode;
+
+public class CarRaceTest {
+
+//    private final CarRace cr = new CarRace();
+//    private final Car car = new Car();
+
+//    @Nested
+//    class testRace {
+//
+//        @Test
+//        @DisplayName("랜덤 값에 따라 true, false 반환하고 doesNotThrowAnyException 예외 발생 여부를 확인한다.")
+//        void shouldReturnStatusOfCarRaceTest() {
+//            System.out.println("3이하 false, 4이상 true : " + car.getStatus());
+//            assertThatCode(car::getStatus).doesNotThrowAnyException();
+//        }
+//
+//        @Test
+//        @DisplayName("자동차 경주 결과를 반환하고 doesNotThrowAnyException 예외 발생 여부를 확인한다.")
+//        void shouldReturnResultOfCarRaceTest() {
+//            cr.carNames = new ArrayList<>(Arrays.asList("neo", "brie", "brown"));
+//            cr.raceAttemptCount = 5;
+//            cr.makeCarObject(cr.carNames.size());
+//            cr.doRace(cr.raceAttemptCount);
+//            assertThatCode(cr::setWinnerCarNames).doesNotThrowAnyException();
+//        }
+//    }
+
+}