diff --git a/README.md b/README.md
index 90a5236..2b5e2a2 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,52 @@
 # 미션 - 자동차 경주 게임
 
+## 📋 기능 구현 목록
+- 사용자 입력 요구문 출력
+- 사용자 입력 
+  - 예외 처리
+  - 플레이어 생성
+  
+- 경주 게임 실행
+  - 무작위 수 생성
+  - 4이상 인지 비교
+  - 1초 간격두고 라운드 결과 출력
+  
+- 우승자 판별
+  - 우승자 출력
+  
+## 🚬 클래스와 메서드?
+- Application
+- Receiver
+  - receiveName
+  - receiveNumber
+- Printer
+  - printMessage
+- GamePlayer
+  - run
+  - judgeToMove
+  - makeArrayAfterGettingName
+  - makeCountAfterGettingNumber
+  - launchAllRound
+  - checkWhoIsWinner
+- Generator
+  - generateRandomNumber
+- Car
+  - getPosition
+  - getName
+  - moveForward
+- Validate
+  - validateName(s)
+    - inputNothing(s)
+    - inputCommaInARow(s)
+    - inputCharactersOtherThanName(s)
+    - startWithComma(s)
+    - endWithComma(s)
+    - over5Characters(s)
+    - inputSameName(s))
+  - validateNumber(s)
+- Message
+
+
 ## 🚀 기능 요구사항
 
 - 주어진 횟수 동안 n대의 자동차는 전진 또는 멈출 수 있다.
diff --git a/build.gradle b/build.gradle
index a40e892..5730ddc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,7 +11,7 @@ repositories {
 
 dependencies {
     testCompile("org.assertj:assertj-core:3.14.0")
-    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.0'
+    testCompile('org.junit.jupiter:junit-jupiter:5.6.0')
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine'
 }
 
diff --git a/src/main/java/Application.java b/src/main/java/Application.java
new file mode 100644
index 0000000..cc58b44
--- /dev/null
+++ b/src/main/java/Application.java
@@ -0,0 +1,8 @@
+import domain.GamePlayer;
+
+public class Application {
+    public static void main(String[] args){
+        GamePlayer gamePlayer = new GamePlayer();
+        gamePlayer.run();
+    }
+}
diff --git a/src/main/java/domain/Car.java b/src/main/java/domain/Car.java
index e5b4a0a..f3e992f 100644
--- a/src/main/java/domain/Car.java
+++ b/src/main/java/domain/Car.java
@@ -8,5 +8,15 @@ public Car(String name) {
         this.name = name;
     }
 
-    // 추가 기능 구현
+    public int getPosition() {
+        return this.position;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public void moveForward() {
+        this.position++;
+    }
 }
diff --git a/src/main/java/domain/CarManager.java b/src/main/java/domain/CarManager.java
new file mode 100644
index 0000000..5f37ddc
--- /dev/null
+++ b/src/main/java/domain/CarManager.java
@@ -0,0 +1,19 @@
+package domain;
+
+import io.Receiver;
+
+public class CarManager {
+    private final Receiver receiver = new Receiver();
+
+    public Car[] produceCar(){
+        String[] listOfName = receiver.receiveName();
+
+        Car[] cars = new Car[listOfName.length];
+        for (int i = 0; i < listOfName.length; i++)
+            cars[i] = new Car(listOfName[i]);
+
+        return cars;
+    }
+
+
+}
diff --git a/src/main/java/domain/GamePlayer.java b/src/main/java/domain/GamePlayer.java
new file mode 100644
index 0000000..dcb5a95
--- /dev/null
+++ b/src/main/java/domain/GamePlayer.java
@@ -0,0 +1,54 @@
+package domain;
+
+import io.Printer;
+import io.Receiver;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class GamePlayer {
+    private final int WINNER_CONDITION = 4;
+    private final Printer printer = new Printer();
+    private final Receiver receiver = new Receiver();
+    private final Generator generator= new Generator();
+    private final CarManager carManager = new CarManager();
+    private final Referee referee = new Referee();
+
+    public void judgeToMove(Car car, int randomNumber) {
+        if (randomNumber >= WINNER_CONDITION)
+            car.moveForward();
+    }
+
+    public int receiveRepeatCount() {
+        printer.printGeneralMessage("INPUT_COUNT");
+        return receiver.receiveNumber();
+    }
+
+    public void launchAllRound(Car[] cars, int countRound) {
+        for (int i = 0; i < countRound; i++) {
+            for (Car car : cars) {
+                judgeToMove(car, generator.generateRandomNumber());
+                printer.printProgressWithSymbol(car.getName(), car.getPosition());
+            }
+            printer.printGeneralMessage("DEFAULT_SPACE");
+
+            try {
+                Thread.sleep(500);
+            } catch (InterruptedException e) {
+                e.printStackTrace(); 
+            }
+        }
+    }
+
+    public void run() {
+        printer.printGeneralMessage("INPUT_NAMEOFCAR");
+        Car[] cars = carManager.produceCar();
+        int countRound = receiveRepeatCount();
+
+        printer.printGeneralMessage("OPERATION_RESULT");
+        launchAllRound(cars, countRound);
+
+        List<Car> winner = referee.checkWinner(cars);
+        printer.printWinner(printer.makeWinnerToString(winner));
+    }
+}
diff --git a/src/main/java/domain/Generator.java b/src/main/java/domain/Generator.java
new file mode 100644
index 0000000..cca5a5a
--- /dev/null
+++ b/src/main/java/domain/Generator.java
@@ -0,0 +1,9 @@
+package domain;
+
+public class Generator {
+    private static final int MAX_LIMIT_NUMBER = 10;
+
+    public int generateRandomNumber() {
+        return (int) ((Math.random() * 10000) % MAX_LIMIT_NUMBER);
+    }
+}
diff --git a/src/main/java/domain/Referee.java b/src/main/java/domain/Referee.java
new file mode 100644
index 0000000..9055474
--- /dev/null
+++ b/src/main/java/domain/Referee.java
@@ -0,0 +1,32 @@
+package domain;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class Referee {
+    private int maxNumber = 0;
+    private final List<Car> result = new ArrayList<>();
+
+    public List<Car> checkWinner(Car[] cars) {
+        findMaxNumber(cars);
+        judgeWinner(cars);
+        return result;
+    }
+
+    public void findMaxNumber(Car[] cars) {
+        int firstPlacePosition = maxNumber;
+
+        for (Car car : cars) {
+            if (car.getPosition() > firstPlacePosition)
+                firstPlacePosition = car.getPosition();
+        }
+        maxNumber = firstPlacePosition;
+    }
+
+    public void judgeWinner(Car[] cars) {
+        for (Car car : cars) {
+            if (car.getPosition() == maxNumber)
+                result.add(car);
+        }
+    }
+}
diff --git a/src/main/java/domain/Validator.java b/src/main/java/domain/Validator.java
new file mode 100644
index 0000000..2c7dce5
--- /dev/null
+++ b/src/main/java/domain/Validator.java
@@ -0,0 +1,103 @@
+package domain;
+
+import io.Printer;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public class Validator implements ValidatorInterface {
+    private static final int MAX_NAME_SIZE = 5;
+    private static final String ONLY_NUMBER = "^[0-9]+$";
+    private static final String COMMA_IN_A_ROW = "^(,,)+$";
+    private static final String OTHER_THAN_CHARACTER = "^[a-zA-Z,]+$";
+
+    Printer printer = new Printer();
+
+    @Override
+    public boolean isCorrectName(String s) {
+        return inputNothing(s)
+                && inputCommaInARow(s)
+                && inputOtherThanCharacter(s)
+                && startWithComma(s)
+                && endWithComma(s)
+                && overSizeCharacters(s)
+                && inputSameName(s);
+    }
+
+    @Override
+    public boolean validateNumber(String s) {
+        return s.matches(ONLY_NUMBER);
+    }
+
+    @Override
+    public boolean inputNothing(String s) {
+        if (s.equals("")) {
+            printer.printExceptionMessage("INPUT_NOTHING");
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean inputCommaInARow(String s) {
+        if (Pattern.matches(COMMA_IN_A_ROW, s)) {
+            printer.printExceptionMessage("INPUT_COMMA_IN_A_ROW");
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean startWithComma(String s) {
+        if (s.charAt(0) == ',') {
+            printer.printExceptionMessage("START_WITH_COMMA");
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean endWithComma(String s) {
+        if (s.charAt(s.length() - 1) == ',') {
+            printer.printExceptionMessage("END_WITH_COMMA");
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean inputOtherThanCharacter(String s) {
+        if (!Pattern.matches(OTHER_THAN_CHARACTER, s)) {
+            printer.printExceptionMessage("INPUT_OTHER_THAN_CHARACTERS");
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean inputSameName(String s) {
+        List<String> CAR_NAME_LIST = Arrays.asList(s.split(","));
+        int sizeOfNameList = CAR_NAME_LIST.size();
+
+        for (int i = 0; i < sizeOfNameList; i++) {
+            if (CAR_NAME_LIST.subList(i + 1, sizeOfNameList).contains(CAR_NAME_LIST.get(i))) {
+                printer.printExceptionMessage("INPUT_SAME_NAME");
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public boolean overSizeCharacters(String s) {
+        String[] splitName = s.split(",");
+        for (String i : splitName)
+            if (i.length() > MAX_NAME_SIZE) {
+                printer.printExceptionMessage("OVER_SIZE_CHARACTERS");
+                return false;
+            }
+        return true;
+    }
+
+}
diff --git a/src/main/java/domain/ValidatorInterface.java b/src/main/java/domain/ValidatorInterface.java
new file mode 100644
index 0000000..365a78f
--- /dev/null
+++ b/src/main/java/domain/ValidatorInterface.java
@@ -0,0 +1,21 @@
+package domain;
+
+public interface ValidatorInterface {
+    boolean isCorrectName(String s);
+
+    boolean validateNumber(String s);
+
+    boolean inputNothing(String s);
+
+    boolean inputCommaInARow(String s);
+
+    boolean startWithComma(String s);
+
+    boolean endWithComma(String s);
+
+    boolean inputOtherThanCharacter(String s);
+
+    boolean inputSameName(String s);
+
+    boolean overSizeCharacters(String s);
+}
diff --git a/src/main/java/empty.txt b/src/main/java/empty.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/src/main/java/io/Message.java b/src/main/java/io/Message.java
new file mode 100644
index 0000000..fd404c6
--- /dev/null
+++ b/src/main/java/io/Message.java
@@ -0,0 +1,42 @@
+package io;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class Message implements MessageInterface {
+    Map<String, String> generalMessageList = new HashMap<String, String>();
+    Map<String, String> exceptionMessageList = new HashMap<String, String>();
+
+    public Message() {
+        this.exceptionMessageList();
+        this.generalMessageList();
+    }
+    private void generalMessageList() {
+        generalMessageList.put("INPUT_NAMEOFCAR", "경주할 자동차 이름을 입력하세요. (이름은 쉼표(,) 기준으로 구분)");
+        generalMessageList.put("INPUT_COUNT", "시도할 회수는 몇회인가요?");
+        generalMessageList.put("OPERATION_RESULT", "실행 결과");
+        generalMessageList.put("FIANL_WINNER", "가 최종 우승했습니다.");
+        generalMessageList.put("DEFAULT_SPACE", "");
+    }
+
+    private void exceptionMessageList() {
+        exceptionMessageList.put("INPUT_NOTHING", "아무 문자도 입력되지 않았습니다.");
+        exceptionMessageList.put("INPUT_COMMA_IN_A_ROW", "쉼표(,)가 연속으로 입력되었습니다.");
+        exceptionMessageList.put("INPUT_OTHER_THAN_CHARACTERS", "영어와 쉼표(,) 이외의 다른 문자가 입력되었습니다.");
+        exceptionMessageList.put("START_WITH_COMMA", "쉼표(,)로 시작합니다.");
+        exceptionMessageList.put("END_WITH_COMMA", "쉼표(,)로 끝납니다.");
+        exceptionMessageList.put("INPUT_SAME_NAME", "같은 이름이 입력되었습니다.");
+        exceptionMessageList.put("OVER_SIZE_CHARACTERS", "이름이 5자 이상입니다.");
+        exceptionMessageList.put("INPUT_CHARACTERS_OTHER_THAN_DIGIT", "숫자 이외의 다른 문자가 입력되었습니다.");
+    }
+
+    @Override
+    public String selectMessageFromGeneral(String Keyword) {
+        return generalMessageList.get(Keyword);
+    }
+
+    @Override
+    public String selectMessageFromException(String Keyword) {
+        return exceptionMessageList.get(Keyword);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/io/MessageInterface.java b/src/main/java/io/MessageInterface.java
new file mode 100644
index 0000000..e1b5c90
--- /dev/null
+++ b/src/main/java/io/MessageInterface.java
@@ -0,0 +1,14 @@
+package io;
+
+public interface MessageInterface {
+
+    private void generalMessageList() {
+    }
+
+    private void exceptionMessageList() {
+    }
+
+    String selectMessageFromGeneral(String Keyword);
+
+    String selectMessageFromException(String Keyword);
+}
diff --git a/src/main/java/io/Printer.java b/src/main/java/io/Printer.java
new file mode 100644
index 0000000..8225381
--- /dev/null
+++ b/src/main/java/io/Printer.java
@@ -0,0 +1,43 @@
+package io;
+
+import domain.Car;
+
+import java.util.List;
+
+public class Printer {
+    private Message message = new Message();
+
+    private static String DEFAULT_SYMBOL = "-";
+
+    public void printProgressWithSymbol(String name, int position) {
+        String result = "";
+        for(int i = 0;i < position;i++)
+            result += DEFAULT_SYMBOL;
+
+        System.out.printf("%5s : %s\n", name, result);
+    }
+
+    public String makeWinnerToString(List<Car> cars) {
+        String winner = cars.get(0).getName();
+
+        if(cars.size() > 1) {
+            for(int i = 1;i<cars.size();i++) {
+                winner += ", " + cars.get(i).getName();
+            }
+        }
+
+        return winner;
+    }
+
+    public void printWinner(String winner) {
+        System.out.println(winner + message.selectMessageFromGeneral("FIANL_WINNER"));
+    }
+
+    public void printGeneralMessage(String s){
+        System.out.println(message.selectMessageFromGeneral(s));
+    }
+
+    public void printExceptionMessage(String s){
+        System.out.println(message.selectMessageFromException(s));
+    }
+}
diff --git a/src/main/java/io/Receiver.java b/src/main/java/io/Receiver.java
new file mode 100644
index 0000000..f51b559
--- /dev/null
+++ b/src/main/java/io/Receiver.java
@@ -0,0 +1,29 @@
+package io;
+
+import domain.Validator;
+
+import java.util.Scanner;
+
+public class Receiver {
+    private static final String SPLIT_DELIMITER = ",";
+    boolean reEnter = false;
+    String inputLine = "";
+    Scanner scanner = new Scanner(System.in);
+    Validator validator = new Validator();
+
+    public String[] receiveName() {
+        do{
+            inputLine = scanner.nextLine();
+            reEnter = validator.isCorrectName(inputLine);
+        }while (!reEnter);
+        return inputLine.split(SPLIT_DELIMITER);
+    }
+
+    public int receiveNumber() {
+        do{
+            inputLine = scanner.nextLine();
+            reEnter = validator.validateNumber(inputLine);
+        }while (!reEnter);
+        return Integer.parseInt(inputLine);
+    }
+}
diff --git a/src/test/java/domain/CarTest.java b/src/test/java/domain/CarTest.java
new file mode 100644
index 0000000..9a5e686
--- /dev/null
+++ b/src/test/java/domain/CarTest.java
@@ -0,0 +1,30 @@
+package domain;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class CarTest {
+    private final String DEFAULT_NAME = "Kim";
+    Car car;
+
+    @BeforeEach
+    void setUp() { car = new Car(DEFAULT_NAME);
+    }
+
+    @Test
+    void getPositionTest() {
+        assertThat(0).isEqualTo(car.getPosition());
+        car.moveForward();
+        assertThat(1).isEqualTo(car.getPosition());
+        car.moveForward();
+        assertThat(2).isEqualTo(car.getPosition());
+    }
+
+    @Test
+    void getName() {
+        assertThat(DEFAULT_NAME).isEqualTo(car.getName());
+    }
+
+}
\ No newline at end of file
diff --git a/src/test/java/domain/GamePlayerTest.java b/src/test/java/domain/GamePlayerTest.java
new file mode 100644
index 0000000..09e3e68
--- /dev/null
+++ b/src/test/java/domain/GamePlayerTest.java
@@ -0,0 +1,57 @@
+package domain;
+
+import io.Printer;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+import java.io.PrintStream;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class GamePlayerTest {
+    private final ByteArrayOutputStream outputStreamCaptor = new ByteArrayOutputStream();
+    GamePlayer gameplayer;
+    Printer printer;
+
+    @BeforeEach
+    void setUp() {
+        System.setOut(new PrintStream(outputStreamCaptor));
+        gameplayer = new GamePlayer();
+    }
+
+    @Test
+    void checkWhoIsWinnerTest() {
+        List<Car> cars = new ArrayList<>();
+        Car car1 = new Car("kim");
+        Car car2 = new Car("park");
+        cars.add(car1);
+        cars.add(car2);
+        Car[] carArray = new Car[]{car1, car2};
+
+        assertThat(cars).isEqualTo(gameplayer.checkWhoIsWinner(carArray));
+    }
+
+
+    @Test
+    void makeCountAfterGettingNumberTest() {
+        String input = "5";
+        InputStream stdin = System.in;
+        int result;
+
+        try {
+            System.setIn(new ByteArrayInputStream(input.getBytes()));
+            gameplayer = new GamePlayer();
+            result = gameplayer.receiveRepeatCount();
+        } finally {
+            System.setIn(stdin);
+        }
+
+        int expected = 5;
+        assertThat(expected).isEqualTo(result);
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/domain/GeneratorTest.java b/src/test/java/domain/GeneratorTest.java
new file mode 100644
index 0000000..fcc70d2
--- /dev/null
+++ b/src/test/java/domain/GeneratorTest.java
@@ -0,0 +1,20 @@
+package domain;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class GeneratorTest {
+    Generator generator;
+
+    @BeforeEach
+    void setUp() {
+        generator = new Generator();
+    }
+
+    @Test
+    void generateRandomNumberTest() {
+        assertThat(generator.generateRandomNumber()).isBetween(0, 9);
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/domain/ValidatorTest.java b/src/test/java/domain/ValidatorTest.java
new file mode 100644
index 0000000..3348019
--- /dev/null
+++ b/src/test/java/domain/ValidatorTest.java
@@ -0,0 +1,82 @@
+package domain;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ValidatorTest {
+
+    private final String NORMAL_INPUT_FOR_NAME = "Park,Song,Kim,Jay";
+    private final String NORMAL_INPUT_FOR_NUMBER = "5";
+    Validator vd;
+
+    @BeforeEach
+    void setup() {
+        vd = new Validator();
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"123,!@a,BDs5", ",,asd,asd,", NORMAL_INPUT_FOR_NAME})
+        //이름 유효성 체크
+    void validateNameTest(String s) {
+        assertThat(vd.isCorrectName(s)).isEqualTo(false);
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"it's not a number", "what else?", NORMAL_INPUT_FOR_NUMBER})
+        //숫자 유효성 체크
+    void validateNumberTest(String s) {
+        assertThat(vd.validateNumber(s)).isEqualTo(false);
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"", NORMAL_INPUT_FOR_NAME})
+        //입력에 아무것도 없을 경우
+    void inputNothingTest(String s) {
+        assertThat(vd.inputNothing(s)).isEqualTo(false);
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {",,,,,,", "kim,song,,park", NORMAL_INPUT_FOR_NAME})
+        //쉼표(,)가 연속으로 나올 경우
+    void inputCommaInARowTest(String s) {
+        assertThat(vd.inputCommaInARow(s)).isEqualTo(false);
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {",Kim,Park,Song", ",,Park,Song,Kim", NORMAL_INPUT_FOR_NAME})
+        //쉼표(,)로 시작할 경우
+    void startWithCommaTest(String s) {
+        assertThat(vd.startWithComma(s)).isEqualTo(false);
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"hobihobi,hoho,hoho,", "asdfgg,asdfghj,zxcvbn,,,", NORMAL_INPUT_FOR_NAME})
+        //쉼표(,)로 끝날 경우
+    void endWithCommaTest(String s) {
+        assertThat(vd.endWithComma(s)).isEqualTo(false);
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"hobㅁ,hoho,hoho", "asd5,asdfghj,zxcvbn", NORMAL_INPUT_FOR_NAME})
+        //입력에 영문, 쉼표(,) 이외의 문자가 있을 경우
+    void inputCharactersOtherThanNameTest(String s) {
+        assertThat(vd.inputOtherThanCharacter(s)).isEqualTo(false);
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"hobihobi,hoho,hoho", "asdfgg,asdfgg,zxcvbn", NORMAL_INPUT_FOR_NAME})
+        //같은 이름이 있을 경우
+    void inputSameNameTest(String s) {
+        assertThat(vd.inputSameName(s)).isEqualTo(false);
+    }
+
+    @ParameterizedTest
+    //이름이 5글자 이상을 경우
+    @ValueSource(strings = {"hobihobi,hoho,hoho", "asdfgg,asdfghj,zxcvbn", NORMAL_INPUT_FOR_NAME})
+    void overSizeCharacterTest(String s) {
+        assertThat(vd.overSizeCharacters(s)).isEqualTo(false);
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/empty.txt b/src/test/java/empty.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/src/test/java/io/MessageTest.java b/src/test/java/io/MessageTest.java
new file mode 100644
index 0000000..93c99e3
--- /dev/null
+++ b/src/test/java/io/MessageTest.java
@@ -0,0 +1,28 @@
+package io;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class MessageTest {
+
+    Message message;
+
+    @BeforeEach
+    void setUp() {
+        message = new Message();
+    }
+
+    @Test
+    void selectMessageFromGeneral() {
+        String result = "경주할 자동차 이름을 입력하세요. (이름은 쉼표(,) 기준으로 구분)";
+        assertThat(message.selectMessageFromGeneral("INPUT_NAMEOFCAR")).isEqualTo(result);
+    }
+
+    @Test
+    void selectMessageFromException() {
+        String result = "아무 문자도 입력되지 않았습니다.";
+        assertThat(message.selectMessageFromException("INPUT_NOTHING")).isEqualTo(result);
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/io/PrinterTest.java b/src/test/java/io/PrinterTest.java
new file mode 100644
index 0000000..1f08a85
--- /dev/null
+++ b/src/test/java/io/PrinterTest.java
@@ -0,0 +1,62 @@
+package io;
+
+import domain.Car;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class PrinterTest {
+    private final ByteArrayOutputStream outputStreamCaptor = new ByteArrayOutputStream();
+    Printer printer;
+    List<Car> cars = new ArrayList<>();
+
+    @BeforeEach
+    void setUp() {
+        System.setOut(new PrintStream(outputStreamCaptor));
+        printer = new Printer();
+    }
+
+    @Test
+    void printProgressWithSymbolTest() {
+        printer.printProgressWithSymbol("kim", 5);
+        assertEquals("kim : -----", outputStreamCaptor.toString().trim());
+    }
+
+    @Test
+    void makeWinnerToStringTest() {
+        Car car1 = new Car("kim");
+        Car car2 = new Car("park");
+        cars.add(car1);
+        cars.add(car2);
+
+        String result = printer.makeWinnerToString(cars);
+        assertThat(result).isEqualTo("kim, park");
+    }
+
+    @Test
+    void printWinnerTest() {
+        printer.printWinner("hobi, nonus");
+        assertEquals("hobi, nonus가 최종 우승했습니다.", outputStreamCaptor.toString().trim());
+
+    }
+
+    @Test
+    void printGeneralMessageTest() {
+        printer.printGeneralMessage("INPUT_COUNT");
+        assertEquals("시도할 회수는 몇회인가요?", outputStreamCaptor.toString().trim());
+
+    }
+
+    @Test
+    void printExceptionMessageTest() {
+        printer.printExceptionMessage("INPUT_NOTHING");
+        assertEquals("아무 문자도 입력되지 않았습니다.", outputStreamCaptor.toString().trim());
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/io/ReceiverTest.java b/src/test/java/io/ReceiverTest.java
new file mode 100644
index 0000000..6919d06
--- /dev/null
+++ b/src/test/java/io/ReceiverTest.java
@@ -0,0 +1,46 @@
+package io;
+
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayInputStream;
+import java.io.InputStream;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class ReceiverTest {
+    @Test
+    void receiveNameTest() {
+        String input = "kim,park,song";
+        InputStream stdin = System.in;
+        String[] result;
+
+        try {
+            System.setIn(new ByteArrayInputStream(input.getBytes()));
+            Receiver receiver = new Receiver();
+            result = receiver.receiveName();
+        } finally {
+            System.setIn(stdin);
+        }
+
+        String[] expected = {"kim", "park", "song"};
+        assertThat(expected).isEqualTo(result);
+    }
+
+    @Test
+    void receiveNumberTest() {
+        String input = "5";
+        InputStream stdin = System.in;
+        int result;
+
+        try {
+            System.setIn(new ByteArrayInputStream(input.getBytes()));
+            Receiver receiver = new Receiver();
+            result = receiver.receiveNumber();
+        } finally {
+            System.setIn(stdin);
+        }
+
+        int expected = 5;
+        assertThat(expected).isEqualTo(result);
+    }
+}
\ No newline at end of file