[LBP] 김태우 자동차 미션 1-3단계 제출합니다.

src/main/java/Car.java

@@ -0,0 +1,46 @@
+public class Car {
+    int position = 0;
+    public int carNumber;
+    public String carName;
+
+    public Car() {
+        this.position = 0;
+    }
+
+    public Car(int carNumber, String carName) {
+        this.carNumber = carNumber;
+        this.carName = carName;
+    }
+
+    public int getRandom() {
+        double randomValue = Math.random();
+        return (int) (randomValue * 9);
+    }
+
+    public boolean getStatus() {
+        int randomValue = getRandom();
+        boolean result = true;
+
+        if (randomValue <= 3) {
+            result = false;
+        }
+
+        return result;
+    }
+
+    public void tryMove() {
+        if(getStatus()) {
+            this.position++;
+        }
+    }
+
+    public int getPosition() {
+        return position;
+    }
+
+
+    public String getCarName() {
+        return carName;
+    }
+
+}

src/main/java/CarRace.java

@@ -0,0 +1,77 @@
+import java.util.*;
+import java.util.stream.Collectors;
+
+public class CarRace {
+    private final List<Car> cars = new ArrayList<>();
+    List<String> carNames;
+    int raceAttemptCount;
+    List<String> winnerCarNames;
+
+    public void receiveCarNamesInput() {
+        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 자동차의 이름을 반드시 입력해주세요.");
+        }
+        carNames = Arrays.asList(value.split(","));
+
+        if(carNames.stream().anyMatch(cn -> cn.length()>5)) {
+            throw new IllegalArgumentException("자동차 이름은 5글자 이하로 작성해주세요.");
+        }
+
+    }
+
+    public void recieveCarRaceAttemptCountInput() {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("시도할 회수는 몇회인가요?");
+        raceAttemptCount = scanner.nextInt();
+    }
+
+    public void makeCarObject(int sizeOfList) {
+        for(int i = 0; i < sizeOfList; i++) {
+            cars.add(new Car(i, carNames.get(i)));
+        }
+    }
+
+    public void moveCars() {
+        for (Car car : cars) {
+            car.tryMove();
+        }
+    }
+
+    public void doRace(int count) {
+        System.out.println("실행 결과");
+        for (int i = 0; i < count; i++) {
+            moveCars();
+            printRaceResult();
+        }
+    }
+
+    public void printRaceResult() {
+        for (Car car : cars) {
+            System.out.println(car.getCarName() + " : " + "-".repeat(car.getPosition()));
+        }
+        System.out.println();
+    }
+
+    public void setWinnerCarNames() {
+        int maxPosition = cars.stream()
+                .max(Comparator.comparingInt(Car::getPosition))
+                .orElseThrow(NoSuchElementException::new)
+                .getPosition();
+
+        winnerCarNames = cars.stream()
+                .filter(c -> c.getPosition() == maxPosition)
+                .map(Car::getCarName)
+                .collect(Collectors.toList());
+    }
+
+    public void printWinnerCarNames() {
+        System.out.print(String.join(", ", winnerCarNames));
+        System.out.println("가 최종 우승했습니다.");
+    }
+
+}

src/main/java/Main.java

@@ -0,0 +1,13 @@
+public class Main {
+    public static void main(String[] args) {
+        CarRace cr = new CarRace();
+
+        cr.receiveCarNamesInput();
+        cr.recieveCarRaceAttemptCountInput();
+        cr.makeCarObject(cr.carNames.size());
+        cr.doRace(cr.raceAttemptCount);
+        cr.setWinnerCarNames();
+        cr.printWinnerCarNames();
+    }
+
+}

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();
+        }
+    }
+
+}