From 10f15f16d617c886fe071c9d9e17f1c7fe2e8a24 Mon Sep 17 00:00:00 2001
From: smileeeey <sumin416@naver.com>
Date: Sun, 16 Mar 2025 21:36:41 +0900
Subject: [PATCH 1/2] =?UTF-8?q?step3)=20=EC=9E=90=EB=8F=99=EC=B0=A8=20?=
 =?UTF-8?q?=EA=B2=BD=EC=A3=BC=20=EA=B2=8C=EC=9E=84=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                     |  6 ++
 build.gradle                                  |  1 +
 .../exception/NegativeNumberException.java    |  5 ++
 src/main/java/racingCar/CarRacingGame.java    | 62 +++++++++++++++++++
 src/main/java/racingCar/InputView.java        | 16 +++++
 src/main/java/racingCar/NumberVerifier.java   | 11 ++++
 src/main/java/racingCar/RacingCar.java        | 38 ++++++++++++
 src/main/java/racingCar/ResultView.java       | 14 +++++
 .../java/racingCar/CarRacingGameTest.java     | 40 ++++++++++++
 src/test/java/racingCar/RacingCarTest.java    | 37 +++++++++++
 10 files changed, 230 insertions(+)
 create mode 100644 src/main/java/exception/NegativeNumberException.java
 create mode 100644 src/main/java/racingCar/CarRacingGame.java
 create mode 100644 src/main/java/racingCar/InputView.java
 create mode 100644 src/main/java/racingCar/NumberVerifier.java
 create mode 100644 src/main/java/racingCar/RacingCar.java
 create mode 100644 src/main/java/racingCar/ResultView.java
 create mode 100644 src/test/java/racingCar/CarRacingGameTest.java
 create mode 100644 src/test/java/racingCar/RacingCarTest.java

diff --git a/README.md b/README.md
index c550c4c2a09..b6b76113d65 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,10 @@
 # 자동차 경주 게임
+
+## 기능 목록
+* 게임 참가자의 이름을 입력받는다. 이름의 구분자는 쉼표(,)이고, 이름이 5자가 넘어가면 NameLengthExceededException을 발생시키고 이름을 다시 입력받도록 한다.
+* 자동차별로 random값을 만들고, 그 숫자가 4 이상이면 전진한다.
+* 전진칸수가 최대값인 자동차가 우승자이다. 공동우승이 가능하다.
+
 ## 진행 방법
 * 자동차 경주 게임 요구사항을 파악한다.
 * 요구사항에 대한 구현을 완료한 후 자신의 github 아이디에 해당하는 브랜치에 Pull Request(이하 PR)를 통해 코드 리뷰 요청을 한다.
diff --git a/build.gradle b/build.gradle
index 6282254c4ce..57f1315cfd8 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,6 +11,7 @@ repositories {
 dependencies {
     testImplementation 'org.assertj:assertj-core:3.22.0'
     testImplementation 'org.junit.jupiter:junit-jupiter:5.8.2'
+    testImplementation 'org.mockito:mockito-core:4.8.1'
 }
 
 java {
diff --git a/src/main/java/exception/NegativeNumberException.java b/src/main/java/exception/NegativeNumberException.java
new file mode 100644
index 00000000000..89af88664f4
--- /dev/null
+++ b/src/main/java/exception/NegativeNumberException.java
@@ -0,0 +1,5 @@
+package exception;
+
+public class NegativeNumberException extends RuntimeException {
+    public NegativeNumberException() { super("negative number is not allowed."); }
+}
diff --git a/src/main/java/racingCar/CarRacingGame.java b/src/main/java/racingCar/CarRacingGame.java
new file mode 100644
index 00000000000..31c92424436
--- /dev/null
+++ b/src/main/java/racingCar/CarRacingGame.java
@@ -0,0 +1,62 @@
+package racingCar;
+
+public class CarRacingGame {
+    private final InputView inputView;
+    private final ResultView resultView;
+    private final NumberVerifier numberVerifier;
+
+    public CarRacingGame(InputView inputView, ResultView resultView, NumberVerifier numberVerifier) {
+        this.inputView = inputView;
+        this.resultView = resultView;
+        this.numberVerifier = numberVerifier;
+    }
+
+    public static void main(String[] args) {
+        InputView inputView = new InputView();
+        ResultView resultView = new ResultView();
+        NumberVerifier numberVerifier = new NumberVerifier();
+        CarRacingGame game = new CarRacingGame(inputView, resultView, numberVerifier);
+        game.startGame();
+    }
+
+    private void startGame() {
+        RacingCar[] cars = getParticipant();
+
+        play(cars, inputView.requestPlayCount());
+    }
+
+    private RacingCar[] getParticipant() {
+        while (true) {
+            int participantCount = inputView.requestParticipant();
+            try {
+                validateNum(participantCount);
+                return createRacingCars(participantCount);
+            } catch (NumberFormatException e) {
+                System.out.println(e.getMessage());
+                throw e;
+            }
+        }
+    }
+
+    void validateNum(int num) {
+        numberVerifier.verify(num);
+    }
+
+    RacingCar[] createRacingCars(int count) {
+        return new RacingCar[count];
+    }
+
+    private void play(RacingCar[] cars, int count) {
+        resultView.printResultTitle();
+        for (int i=0 ; i<count ; i++) {
+            moveCar(cars);
+            resultView.printPlay(cars);
+        }
+    }
+
+    private void moveCar(RacingCar[] cars) {
+        for (RacingCar car : cars) {
+            car.progress();
+        }
+    }
+}
diff --git a/src/main/java/racingCar/InputView.java b/src/main/java/racingCar/InputView.java
new file mode 100644
index 00000000000..539f53ca3ef
--- /dev/null
+++ b/src/main/java/racingCar/InputView.java
@@ -0,0 +1,16 @@
+package racingCar;
+
+import java.util.Scanner;
+
+public class InputView {
+    private static Scanner scanner = new Scanner(System.in);
+    int requestParticipant() {
+        System.out.println("자동차 대수는 몇 대 인가요?");
+        return Integer.parseInt(scanner.nextLine());
+    }
+
+    int requestPlayCount() {
+        System.out.println("시도할 회수는 몇 회 인가요?");
+        return Integer.parseInt(scanner.nextLine());
+    }
+}
diff --git a/src/main/java/racingCar/NumberVerifier.java b/src/main/java/racingCar/NumberVerifier.java
new file mode 100644
index 00000000000..c280394c49b
--- /dev/null
+++ b/src/main/java/racingCar/NumberVerifier.java
@@ -0,0 +1,11 @@
+package racingCar;
+
+import exception.NegativeNumberException;
+
+public class NumberVerifier {
+    void verify(int num) {
+        if (num <= 0) {
+            throw new NegativeNumberException();
+        }
+    }
+}
diff --git a/src/main/java/racingCar/RacingCar.java b/src/main/java/racingCar/RacingCar.java
new file mode 100644
index 00000000000..d0db043faf9
--- /dev/null
+++ b/src/main/java/racingCar/RacingCar.java
@@ -0,0 +1,38 @@
+package racingCar;
+
+import java.util.Random;
+
+public class RacingCar {
+    private int pos;
+
+    public RacingCar(int pos) {
+        this.pos = pos;
+    }
+
+    public int getPos() {
+        return pos;
+    }
+
+    public void setPos(int pos) {
+        this.pos = pos;
+    }
+
+    @Override
+    public String toString() {
+        return "RacingCar{" + "pos=" + pos + '}';
+    }
+
+    int makeRandomNum() {
+        return new Random().nextInt(10);
+    }
+
+    void progress() {
+        if (makeRandomNum() >= 4){
+            incPos();
+        }
+    }
+
+    protected void incPos() {
+        ++this.pos;
+    }
+}
diff --git a/src/main/java/racingCar/ResultView.java b/src/main/java/racingCar/ResultView.java
new file mode 100644
index 00000000000..16d94e092cb
--- /dev/null
+++ b/src/main/java/racingCar/ResultView.java
@@ -0,0 +1,14 @@
+package racingCar;
+
+public class ResultView {
+    void printResultTitle() {
+        System.out.println("실행 결과");
+    }
+
+    void printPlay(RacingCar[] cars) {
+        for (RacingCar car : cars) {
+            System.out.println("-".repeat(car.getPos()));
+        }
+        System.out.println();
+    }
+}
diff --git a/src/test/java/racingCar/CarRacingGameTest.java b/src/test/java/racingCar/CarRacingGameTest.java
new file mode 100644
index 00000000000..5935c422cc7
--- /dev/null
+++ b/src/test/java/racingCar/CarRacingGameTest.java
@@ -0,0 +1,40 @@
+package racingCar;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.mock;
+
+class CarRacingGameTest {
+    private CarRacingGame carRacingGame;
+    private RacingCar[] cars;
+
+    @BeforeEach
+    void setUp() {
+        InputView mockInputView = mock(InputView.class);
+        ResultView mockResultView = mock(ResultView.class);
+        NumberVerifier numberVerifier = mock(NumberVerifier.class);
+        carRacingGame = new CarRacingGame(mockInputView, mockResultView, numberVerifier);
+        cars = new RacingCar[3];
+    }
+
+    @Test
+    void testValidateNames_validNames() {
+        int TEST_COUNT = 3;
+        assertDoesNotThrow(() -> carRacingGame.validateNum(TEST_COUNT));
+    }
+
+    @Test
+    void testValidateNames_invalidNames() {
+        int TEST_COUNT = 3;
+        assertThrows(NumberFormatException.class, () -> carRacingGame.validateNum(TEST_COUNT));
+    }
+
+    @Test
+    void testCreateRacingCars() {
+        int TEST_COUNT = 3;
+        RacingCar[] createdCars = carRacingGame.createRacingCars(TEST_COUNT);
+        assertEquals(3, createdCars.length);
+    }
+}
diff --git a/src/test/java/racingCar/RacingCarTest.java b/src/test/java/racingCar/RacingCarTest.java
new file mode 100644
index 00000000000..b6100707e60
--- /dev/null
+++ b/src/test/java/racingCar/RacingCarTest.java
@@ -0,0 +1,37 @@
+package racingCar;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.mockito.Mockito.*;
+
+class RacingCarTest {
+
+    private RacingCar car;
+
+    @BeforeEach
+    void setUp() {
+        car = spy(new RacingCar(0));
+    }
+
+    @Test
+    void makeRandomNum() {
+        int random = car.makeRandomNum();
+        assertTrue(random >= 0 && random <= 9);
+    }
+
+    @Test
+    void progress() {
+        // given
+        doReturn(4).when(car).makeRandomNum();
+        int expected = car.getPos()+1;
+
+        // when
+        car.progress();
+
+        // then
+        assertEquals(expected, car.getPos());
+    }
+}

From d5b4466bced4de8b1e26f107a6acf2521e66a2e0 Mon Sep 17 00:00:00 2001
From: smileeeey <sumin416@naver.com>
Date: Thu, 20 Mar 2025 21:31:31 +0900
Subject: [PATCH 2/2] =?UTF-8?q?=EB=A6=AC=EB=B7=B0=20=EB=B0=98=EC=98=81?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/racingCar/CarRacingGame.java    | 18 +++++------
 src/main/java/racingCar/RacingCar.java        | 32 +++++++------------
 .../java/racingCar/RandomNumberGenerator.java | 10 ++++++
 src/main/java/racingCar/ResultView.java       |  2 +-
 .../java/racingCar/CarRacingGameTest.java     | 25 +++------------
 .../java/racingCar/NumberVerifierTest.java    | 28 ++++++++++++++++
 src/test/java/racingCar/RacingCarTest.java    | 19 +++--------
 .../racingCar/RandomNumberGeneratorTest.java  | 17 ++++++++++
 8 files changed, 86 insertions(+), 65 deletions(-)
 create mode 100644 src/main/java/racingCar/RandomNumberGenerator.java
 create mode 100644 src/test/java/racingCar/NumberVerifierTest.java
 create mode 100644 src/test/java/racingCar/RandomNumberGeneratorTest.java

diff --git a/src/main/java/racingCar/CarRacingGame.java b/src/main/java/racingCar/CarRacingGame.java
index 31c92424436..e253b77de35 100644
--- a/src/main/java/racingCar/CarRacingGame.java
+++ b/src/main/java/racingCar/CarRacingGame.java
@@ -26,15 +26,13 @@ private void startGame() {
     }
 
     private RacingCar[] getParticipant() {
-        while (true) {
-            int participantCount = inputView.requestParticipant();
-            try {
-                validateNum(participantCount);
-                return createRacingCars(participantCount);
-            } catch (NumberFormatException e) {
-                System.out.println(e.getMessage());
-                throw e;
-            }
+        int participantCount = inputView.requestParticipant();
+        try {
+            validateNum(participantCount);
+            return createRacingCars(participantCount);
+        } catch (NumberFormatException e) {
+            System.out.println(e.getMessage());
+            throw e;
         }
     }
 
@@ -48,7 +46,7 @@ RacingCar[] createRacingCars(int count) {
 
     private void play(RacingCar[] cars, int count) {
         resultView.printResultTitle();
-        for (int i=0 ; i<count ; i++) {
+        for (int i = 0; i < count; i++) {
             moveCar(cars);
             resultView.printPlay(cars);
         }
diff --git a/src/main/java/racingCar/RacingCar.java b/src/main/java/racingCar/RacingCar.java
index d0db043faf9..3f997defdb3 100644
--- a/src/main/java/racingCar/RacingCar.java
+++ b/src/main/java/racingCar/RacingCar.java
@@ -1,38 +1,30 @@
 package racingCar;
 
-import java.util.Random;
-
 public class RacingCar {
-    private int pos;
-
-    public RacingCar(int pos) {
-        this.pos = pos;
-    }
+    private int position;
+    private RandomNumberGenerator randomNumberGenerator;
 
-    public int getPos() {
-        return pos;
+    public RacingCar(int position, RandomNumberGenerator randomNumberGenerator) {
+        this.position = position;
+        this.randomNumberGenerator = randomNumberGenerator;
     }
 
-    public void setPos(int pos) {
-        this.pos = pos;
+    public int getPosition() {
+        return position;
     }
 
     @Override
     public String toString() {
-        return "RacingCar{" + "pos=" + pos + '}';
-    }
-
-    int makeRandomNum() {
-        return new Random().nextInt(10);
+        return "RacingCar{" + "position=" + position + '}';
     }
 
     void progress() {
-        if (makeRandomNum() >= 4){
-            incPos();
+        if (randomNumberGenerator.makeRandomNumber() >= 4){
+            incPosition();
         }
     }
 
-    protected void incPos() {
-        ++this.pos;
+    protected void incPosition() {
+        ++this.position;
     }
 }
diff --git a/src/main/java/racingCar/RandomNumberGenerator.java b/src/main/java/racingCar/RandomNumberGenerator.java
new file mode 100644
index 00000000000..366bbcaaf62
--- /dev/null
+++ b/src/main/java/racingCar/RandomNumberGenerator.java
@@ -0,0 +1,10 @@
+package racingCar;
+
+import java.util.Random;
+
+class RandomNumberGenerator{
+    final int RANDOM_NUMBER_BOUND = 10;
+    public int makeRandomNumber() {
+        return new Random().nextInt(RANDOM_NUMBER_BOUND);
+    }
+}
diff --git a/src/main/java/racingCar/ResultView.java b/src/main/java/racingCar/ResultView.java
index 16d94e092cb..0c0c7d5b018 100644
--- a/src/main/java/racingCar/ResultView.java
+++ b/src/main/java/racingCar/ResultView.java
@@ -7,7 +7,7 @@ void printResultTitle() {
 
     void printPlay(RacingCar[] cars) {
         for (RacingCar car : cars) {
-            System.out.println("-".repeat(car.getPos()));
+            System.out.println("-".repeat(car.getPosition()));
         }
         System.out.println();
     }
diff --git a/src/test/java/racingCar/CarRacingGameTest.java b/src/test/java/racingCar/CarRacingGameTest.java
index 5935c422cc7..819c1c50910 100644
--- a/src/test/java/racingCar/CarRacingGameTest.java
+++ b/src/test/java/racingCar/CarRacingGameTest.java
@@ -3,32 +3,17 @@
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
-import static org.junit.jupiter.api.Assertions.*;
-import static org.mockito.Mockito.mock;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 class CarRacingGameTest {
     private CarRacingGame carRacingGame;
-    private RacingCar[] cars;
 
     @BeforeEach
     void setUp() {
-        InputView mockInputView = mock(InputView.class);
-        ResultView mockResultView = mock(ResultView.class);
-        NumberVerifier numberVerifier = mock(NumberVerifier.class);
-        carRacingGame = new CarRacingGame(mockInputView, mockResultView, numberVerifier);
-        cars = new RacingCar[3];
-    }
-
-    @Test
-    void testValidateNames_validNames() {
-        int TEST_COUNT = 3;
-        assertDoesNotThrow(() -> carRacingGame.validateNum(TEST_COUNT));
-    }
-
-    @Test
-    void testValidateNames_invalidNames() {
-        int TEST_COUNT = 3;
-        assertThrows(NumberFormatException.class, () -> carRacingGame.validateNum(TEST_COUNT));
+        InputView inputView = new InputView();
+        ResultView resultView = new ResultView();
+        NumberVerifier numberVerifier = new NumberVerifier();
+        carRacingGame = new CarRacingGame(inputView, resultView, numberVerifier);
     }
 
     @Test
diff --git a/src/test/java/racingCar/NumberVerifierTest.java b/src/test/java/racingCar/NumberVerifierTest.java
new file mode 100644
index 00000000000..90797ba7972
--- /dev/null
+++ b/src/test/java/racingCar/NumberVerifierTest.java
@@ -0,0 +1,28 @@
+package racingCar;
+
+import exception.NegativeNumberException;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class NumberVerifierTest {
+
+    @Test
+    public void testVerify_WithPositiveNumber() {
+        NumberVerifier verifier = new NumberVerifier();
+        verifier.verify(5);
+    }
+
+    @Test
+    public void testVerify_WithZero_ShouldThrowException() {
+        NumberVerifier verifier = new NumberVerifier();
+        assertThrows(NegativeNumberException.class, () -> verifier.verify(0));
+    }
+
+    @Test
+    public void testVerify_WithNegativeNumber_ShouldThrowException() {
+        NumberVerifier verifier = new NumberVerifier();
+        assertThrows(NegativeNumberException.class, () -> verifier.verify(-1));
+    }
+}
+
diff --git a/src/test/java/racingCar/RacingCarTest.java b/src/test/java/racingCar/RacingCarTest.java
index b6100707e60..4000d782120 100644
--- a/src/test/java/racingCar/RacingCarTest.java
+++ b/src/test/java/racingCar/RacingCarTest.java
@@ -4,34 +4,25 @@
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.mockito.Mockito.*;
 
 class RacingCarTest {
 
     private RacingCar car;
+    RandomNumberGenerator mockGenerator = mock(RandomNumberGenerator.class);
 
     @BeforeEach
     void setUp() {
-        car = spy(new RacingCar(0));
-    }
-
-    @Test
-    void makeRandomNum() {
-        int random = car.makeRandomNum();
-        assertTrue(random >= 0 && random <= 9);
+        car = spy(new RacingCar(0, mockGenerator));
     }
 
     @Test
     void progress() {
-        // given
-        doReturn(4).when(car).makeRandomNum();
-        int expected = car.getPos()+1;
+        when(mockGenerator.makeRandomNumber()).thenReturn(4);
+        int expected = car.getPosition() + 1;
 
-        // when
         car.progress();
 
-        // then
-        assertEquals(expected, car.getPos());
+        assertEquals(expected, car.getPosition());
     }
 }
diff --git a/src/test/java/racingCar/RandomNumberGeneratorTest.java b/src/test/java/racingCar/RandomNumberGeneratorTest.java
new file mode 100644
index 00000000000..c2911f928ca
--- /dev/null
+++ b/src/test/java/racingCar/RandomNumberGeneratorTest.java
@@ -0,0 +1,17 @@
+package racingCar;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.*;
+
+class RandomNumberGeneratorTest {
+    @Test
+    public void testMakeRandomNumber_WithMock() {
+        RandomNumberGenerator mockGenerator = mock(RandomNumberGenerator.class);
+        when(mockGenerator.makeRandomNumber()).thenReturn(4);
+
+        assertEquals(4, mockGenerator.makeRandomNumber());
+        verify(mockGenerator).makeRandomNumber();
+    }
+}