Step5 - 자동차 경주(리팩토링) 및 피드백 반영

src/main/java/racingcar/RacingGame.java

@@ -1,12 +1,15 @@
 package racingcar;
 
+import racingcar.domain.Car;
+import racingcar.domain.Winner;
+import racingcar.utils.RandomNumber;
+import racingcar.view.InputView;
+import racingcar.view.ResultView;
+
 import java.util.Collections;
 import java.util.List;
-import java.util.Random;
 
 public class RacingGame {
-    private static final int MAX_VALUE = 10;
-
     public static void main(String[] args) {
         InputView inputView = new InputView();
         ResultView resultView = new ResultView();
@@ -23,18 +26,16 @@ public static void main(String[] args) {
         Collections.reverse(cars);
 
         Winner winner = Winner.of(Winner.resultPointOfFirst(cars));
+        System.out.println(winner.firstResultPoint());
 
-        winner.extracted(resultView, cars, winner);
+        winner.winnerSelection(resultView, cars);
     }
 
     public static void printAll(List<Car> cars) {
+        RandomNumber randomNumber = new RandomNumber();
         ResultView resultView = new ResultView();
         for(Car car: cars) {
-            Random random = new Random();
-
-            int randomNumber = random.nextInt(MAX_VALUE);
-            int moveNumber = car.move(randomNumber);
-
+            int moveNumber = car.move(randomNumber.producedRandomNumber());
             resultView.print(car.getName(), moveNumber);
         }
         System.out.println();

src/main/java/racingcar/Car.java → src/main/java/racingcar/domain/Car.java

@@ -1,4 +1,4 @@
-package racingcar;
+package racingcar.domain;
 
 import java.util.ArrayList;
 import java.util.List;

src/main/java/racingcar/domain/Name.java

@@ -0,0 +1,18 @@
+package racingcar.domain;
+
+public class Name {
+    private static final int LIMIT_CAR_NAME_LENGTH = 5;
+    private String carName;
+
+    private Name(String carName) {
+        this.carName = carName;
+    }
+
+    public static Name validateByName(String carName) {
+        if(carName.length() >= LIMIT_CAR_NAME_LENGTH) {
+            throw new IllegalArgumentException("이름은 5글자가 최대입니다.");
+        }
+        return new Name(carName);
+    }
+
+}

src/main/java/racingcar/Winner.java → src/main/java/racingcar/domain/Winner.java

@@ -1,4 +1,6 @@
-package racingcar;
+package racingcar.domain;
+
+import racingcar.view.ResultView;
 
 import java.util.List;
 import java.util.stream.Collectors;
@@ -14,6 +16,12 @@ public static Winner of(int firstResultPoint) {
         return new Winner(firstResultPoint);
     }
 
+    public static int resultPointOfFirst(List<Car> cars) {
+        return cars.stream().map(Car::getMoveSpace)
+                            .max(Integer::compareTo)
+                            .get();
+    }
+
     public int firstResultPoint() {
         return getFirstResultPoint();
     }
@@ -22,17 +30,11 @@ private int getFirstResultPoint() {
         return firstResultPoint;
     }
 
-    public void extracted(ResultView resultView, List<Car> cars, Winner winner) {
+    public void winnerSelection(ResultView resultView, List<Car> cars) {
         List<Car> winners = cars.stream()
-                .filter(car -> car.getMoveSpace() == winner.firstResultPoint())
+                .filter(car -> car.getMoveSpace() == firstResultPoint())
                 .collect(Collectors.toList());
 
         resultView.getWinner(winners);
     }
-
-    public static int resultPointOfFirst(List<Car> cars) {
-        return cars.stream().map(Car::getMoveSpace)
-                            .max(Integer::compareTo)
-                            .get();
-    }
 }

src/main/java/racingcar/utils/RandomNumber.java

@@ -0,0 +1,19 @@
+package racingcar.utils;
+
+import java.util.Random;
+
+public class RandomNumber {
+    private static final int MAX_VALUE = 10;
+
+    private int randomNumber;
+
+    public int producedRandomNumber() {
+        randomNumber = createRandomNum();
+        return randomNumber;
+    }
+
+    private int createRandomNum() {
+        Random random = new Random();
+        return random.nextInt(MAX_VALUE);
+    }
+}

src/main/java/racingcar/InputView.java → src/main/java/racingcar/view/InputView.java

@@ -1,4 +1,6 @@
-package racingcar;
+package racingcar.view;
+
+import racingcar.domain.Name;
 
 import java.util.Scanner;
 
@@ -7,7 +9,6 @@
  */
 public class InputView {
     private static final Scanner sc = new Scanner(System.in);
-    private static final int LIMIT_CAR_NAME_LENGTH = 5;
 
     public String[] insertCarNames() {
         System.out.println("경주할 자동차 이름을 입력하세요");
@@ -24,18 +25,11 @@ public String[] splitCarName(String text) {
     private String[] createNameOfCarsArray(String text) {
         String[] cars = text.split(",");
         for (int i = 0; i < cars.length; i++) {
-            carLengthValidate(cars[i]);
+            Name.validateByName(cars[i]);
         }
         return text.split(",");
     }
 
-    private void carLengthValidate(String car) {
-        if (car.length() > LIMIT_CAR_NAME_LENGTH) {
-            throw new IllegalArgumentException("이름은 5글자가 최대입니다.");
-        }
-    }
-
-
     public int getNumberOfTry() {
         System.out.println("시도할 횟수는 몇 회 인가요?");
         return sc.nextInt();

src/main/java/racingcar/ResultView.java → src/main/java/racingcar/view/ResultView.java

@@ -1,4 +1,6 @@
-package racingcar;
+package racingcar.view;
+
+import racingcar.domain.Car;
 
 import java.util.List;
 

src/test/java/racingcar/CarTest.java

@@ -3,6 +3,8 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
+import racingcar.domain.Car;
+import racingcar.view.InputView;
 
 import java.util.List;
 import java.util.Random;

src/test/java/racingcar/RacingGameTest.java

@@ -2,6 +2,7 @@
 
 import org.junit.jupiter.api.DisplayName;
 import org.junit.jupiter.api.Test;
+import racingcar.domain.Car;
 
 import java.util.List;