[Step 3] 자동차 경주

src/main/java/CarRacingGame/CarRacingGame.java

@@ -0,0 +1,15 @@
+package CarRacingGame;
+
+public class CarRacingGame {
+    static CarRacingGameUtils cars = new CarRacingGameUtils();
+
+    public static void main(String[] args) {
+
+        int numberOfCars = InputView.inputNumberOfCars();
+        int numberOfAttempts = InputView.inputNumberOfAttempts();
+
+        cars.initialCarSettings(numberOfCars);
+        cars.printMovingCars(numberOfAttempts);
+    }
+}
+

src/main/java/CarRacingGame/CarRacingGameUtils.java

@@ -0,0 +1,44 @@
+package CarRacingGame;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Random;
+
+public class CarRacingGameUtils {
+    public Map<String, String> cars;
+
+    //    TODO. 초기 차 인풋을 받고 차의 이동거리가 1인 상태에서 시작하는지,
+    //     차의 이동거리가 0 인상태에서 시작되는 것인지 확인 필요
+    public Map<String, String> initialCarSettings(Integer numberOfCars) {
+        cars = new HashMap<>();
+        for (int carNum = 1; carNum <= numberOfCars; carNum++) {
+            cars.put("car" + carNum, "-");
+        }
+        return cars;
+    }
+
+    public void printMovingCars(int numberOfAttempts) {
+        System.out.println("실행 결과");
+        for (int attempt = 0; attempt < numberOfAttempts; attempt++) {
+            PrintView.printCars(cars);
+            moveCars();
+            System.out.println();
+        }
+    }
+
+    public void moveCars() {
+        cars.forEach((carNumber, currentPosition) -> {
+            String newPosition = makeDistanceOfCars(currentPosition);
+            cars.put(carNumber, newPosition);
+        });
+    }
+
+    public String makeDistanceOfCars(String currentPosition) {
+        Random random = new Random();
+        int randomValue = random.nextInt(10);
+        if (randomValue >= 4) {
+            currentPosition += "-";
+        }
+        return currentPosition;
+    }
+}

src/main/java/CarRacingGame/InputView.java

@@ -0,0 +1,25 @@
+package CarRacingGame;
+
+import java.util.Scanner;
+
+public class InputView {
+    private static final Scanner scanner = new Scanner(System.in);
+
+    public static int inputNumberOfCars() {
+        System.out.println("자동차 대수는 몇 대 인가요?");
+        int numberOfCars = scanner.nextInt();
+        if (numberOfCars <= 0) {
+            throw new IllegalArgumentException("Number of cars should be positive");
+        }
+        return numberOfCars;
+    }
+
+    public static int inputNumberOfAttempts() {
+        System.out.println("시도할 회수는 몇 회 인가요?");
+        int numberOfAttempts = scanner.nextInt();
+        if (numberOfAttempts <= 0) {
+            throw new IllegalArgumentException("Number of attempts should be positive");
+        }
+        return numberOfAttempts;
+    }
+}

src/main/java/CarRacingGame/PrintView.java

@@ -0,0 +1,12 @@
+package CarRacingGame;
+
+import java.util.Map;
+
+public class PrintView {
+
+    public static void printCars(Map<String, String> cars) {
+        cars.forEach((car, position) -> {
+            System.out.println(position);
+        });
+    }
+}

src/main/java/StringAddCalculator/StringCalculatorUtils.java

@@ -5,17 +5,20 @@
 
 public class StringCalculatorUtils {
 
+    private static final String DELEMETER = ",|:";
+
     public static String[] splitStringCalculator(String inputs) {
-        String DELEMETER = ",|:";
         String splitedString = inputs;
+        String currentDelimeter = DELEMETER;
 
         if (inputs.startsWith("//")) {
             int separatorIndex = inputs.indexOf("\n");
-            DELEMETER = inputs.substring(2, separatorIndex);
+            currentDelimeter = inputs.substring(2, separatorIndex);  // 사용자 정의 구분자를 currentDelimeter에 저장
             splitedString = inputs.substring(separatorIndex + 1);
         }
 
-        return splitedString.split(DELEMETER);
+        return splitedString.split(currentDelimeter);
+
     }
     public static List<Integer> convertInputs(String[] inputs) {
         List<Integer> result = new ArrayList<>();
@@ -29,7 +32,7 @@ public static List<Integer> convertInputs(String[] inputs) {
     private static int toPositiveInteger(String input) {
         int number = Integer.parseInt(input);
         if (number < 0) {
-            throw new RuntimeException("There is wrong value included: " + input);
+            throw new IllegalArgumentException("There is wrong value included: " + input);
         }
         return number;
     }

src/test/java/CarRacingUtilsTest.java

@@ -0,0 +1,39 @@
+import CarRacingGame.CarRacingGameUtils;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class CarRacingUtilsTest {
+
+    private CarRacingGameUtils carRacingGameUtils;
+
+    @BeforeEach
+    public void setUp() {
+        carRacingGameUtils = new CarRacingGameUtils();
+    }
+
+    @Test
+    @DisplayName("Set the numbers of the cars and check proper numbers of items")
+    public void testInitialCarSettings() {
+        carRacingGameUtils.initialCarSettings(3);
+        Map<String, String> cars = carRacingGameUtils.initialCarSettings(3);
+        assertEquals(3, cars.size());
+
+    }
+
+    @Test
+    @DisplayName("Set the numbers of the cars and check cars move properly")
+    public void testMoveCars() {
+        int numberOfCars = 2;
+        carRacingGameUtils.initialCarSettings(numberOfCars);
+        carRacingGameUtils.moveCars();
+        carRacingGameUtils.cars.forEach((car, position) -> {
+            assertTrue(position.equals("-") || position.equals("--"));
+        });
+    }
+}