From c2a7f38a456600b32d7207888d11c7a60ae2dcc7 Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 16:51:25 +0900
Subject: [PATCH 01/19] =?UTF-8?q?docs(readme):=20=EA=B5=AC=ED=98=84=20?=
 =?UTF-8?q?=EA=B8=B0=EB=8A=A5=20=EB=AA=A9=EB=A1=9D=20=EC=9E=91=EC=84=B1?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 docs/README.md | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 docs/README.md

diff --git a/docs/README.md b/docs/README.md
new file mode 100644
index 00000000..47923ef1
--- /dev/null
+++ b/docs/README.md
@@ -0,0 +1,49 @@
+# 💪 프로젝트 개요
+
+숫자 야구 게임
+
+# 게임 설명
+
+- 기본적으로 1부터 9까지 서로 다른 수로 이루어진 3자리의 수를 맞추는 게임이다.
+- 같은 수가 같은 자리에 있으면 스트라이크, 다른 자리에 있으면 볼, 같은 수가 전혀 없으면 포볼 또는 낫싱이란 힌트를
+얻고, 그 힌트를 이용해서 먼저 상대방(컴퓨터)의 수를 맞추면 승리한다.
+- [예] 상대방(컴퓨터)의 수가 425일 때, 123을 제시한 경우 : 1스트라이크, 456을 제시한 경우 : 1스트라이크 1볼,
+789를 제시한 경우 : 낫싱
+- 위 숫자 야구게임에서 상대방의 역할을 컴퓨터가 한다. 컴퓨터는 1에서 9까지 서로 다른 임의의 수 3개를 선택한다. 게
+임 플레이어는 컴퓨터가 생각하고 있는 3개의 숫자를 입력하고, 컴퓨터는 입력한 숫자에 대한 결과를 출력한다.
+- 이 같은 과정을 반복해 컴퓨터가 선택한 3개의 숫자를 모두 맞히면 게임이 종료된다.
+- 게임을 종료한 후 게임을 다시 시작하거나 완전히 종료할 수 있다.
+- 사용자가 잘못된 값을 입력할 경우 [ERROR]로 시작하는 에러 메시지를 출력하고 게임을 계속 진행할 수 있어야 한다.
+
+# 📝 구현 기능 목록
+
+### 게임 준비 기능
+- [ ] 컴퓨터는 1에서 9까지 서로 다른 임의의 수 3개를 선택하고 저장한다.
+
+### 사용자 입력 기능
+- [ ] `숫자를 입력해주세요 :`를 출력한다.
+- [ ] 숫자 3개를 입력받는다.
+- [ ] 입력값을 검증한다.
+  - [ ] 빈 문자열이나 공백이면 에러를 반환한다.
+  - [ ] 입력이 숫자가 3개가 아니면 에러를 반환한다.
+  - [ ] 숫자에 0이 포함되어 있으면 에러를 반환한다.
+  - [ ] 서로 다른 숫자가 아니면 에러를 반환한다.
+  - [ ] 에러를 반환한 경우에는 에러 메시지를 출력한 후에 입력을 다시 받는다.
+
+### 게임 기능
+- [ ] 결과를 판단한다.
+  - [ ] 스트라이크와 볼 갯수를 센다.
+    - [ ] 같은 수가 같은 자리에 있으면 스트라이크를 추가한다.
+    - [ ] 같은 수가 다른 자리에 있으면 볼을 추가한다.
+  - [ ] 스트라이크와 볼이 없으면 낫싱으로 판단한다.
+- [ ] 결과를 출력한다.
+- [ ] 정답이 아니면 `숫자를 입력해주세요 :`를 출력하고 사용자에게 다시 입력을 받는다.
+
+### 게임 종료 기능
+- [ ] `3개의 숫자를 모두 맞히셨습니다! 게임 끝`를 출력하고 종료한다.
+- [ ] `게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.`를 출력한다.
+- [ ] 사용자에게 1 또는 2를 입력받는다.
+- [ ] 다른 값인 경우에는 에러를 반환한다.
+  - [ ] 에러를 반환한 경우에는 에러 메시지를 출력한 후에 입력을 다시 받는다.
+- [ ] 1을 입력받은 경우 게임 준비 기능부터 게임을 새로 시작한다.
+- [ ] 2를 입력받은 경우 게임을 종료한다.

From 59032d4abe803f91a6e0af1fb186222d88bc9272 Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 16:52:34 +0900
Subject: [PATCH 02/19] =?UTF-8?q?feat(InputView):=20=EC=82=AC=EC=9A=A9?=
 =?UTF-8?q?=EC=9E=90=20=EC=88=AB=EC=9E=90=20=EC=9E=85=EB=A0=A5=20=EA=B8=B0?=
 =?UTF-8?q?=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 docs/README.md                                |  5 ++--
 src/main/java/.gitkeep                        |  0
 src/main/java/baseball/Application.java       | 15 ++++++++++
 .../controller/BaseballController.java        | 29 +++++++++++++++++++
 .../global/exception/CustomException.java     | 13 +++++++++
 .../baseball/global/message/ErrorMessage.java | 16 ++++++++++
 .../baseball/global/message/InputMessage.java | 17 +++++++++++
 src/main/java/baseball/view/InputView.java    | 15 ++++++++++
 src/main/java/baseball/view/OutputView.java   |  7 +++++
 9 files changed, 115 insertions(+), 2 deletions(-)
 delete mode 100644 src/main/java/.gitkeep
 create mode 100644 src/main/java/baseball/Application.java
 create mode 100644 src/main/java/baseball/controller/BaseballController.java
 create mode 100644 src/main/java/baseball/global/exception/CustomException.java
 create mode 100644 src/main/java/baseball/global/message/ErrorMessage.java
 create mode 100644 src/main/java/baseball/global/message/InputMessage.java
 create mode 100644 src/main/java/baseball/view/InputView.java
 create mode 100644 src/main/java/baseball/view/OutputView.java

diff --git a/docs/README.md b/docs/README.md
index 47923ef1..a3ceb43d 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -21,12 +21,13 @@
 - [ ] 컴퓨터는 1에서 9까지 서로 다른 임의의 수 3개를 선택하고 저장한다.
 
 ### 사용자 입력 기능
-- [ ] `숫자를 입력해주세요 :`를 출력한다.
-- [ ] 숫자 3개를 입력받는다.
+- [x] `숫자를 입력해주세요 :`를 출력한다.
+- [x] 사용자에게 입력을 받는다.
 - [ ] 입력값을 검증한다.
   - [ ] 빈 문자열이나 공백이면 에러를 반환한다.
   - [ ] 입력이 숫자가 3개가 아니면 에러를 반환한다.
   - [ ] 숫자에 0이 포함되어 있으면 에러를 반환한다.
+  - [ ] 숫자 3개가 아니면 에러를 반환한다.
   - [ ] 서로 다른 숫자가 아니면 에러를 반환한다.
   - [ ] 에러를 반환한 경우에는 에러 메시지를 출력한 후에 입력을 다시 받는다.
 
diff --git a/src/main/java/.gitkeep b/src/main/java/.gitkeep
deleted file mode 100644
index e69de29b..00000000
diff --git a/src/main/java/baseball/Application.java b/src/main/java/baseball/Application.java
new file mode 100644
index 00000000..5287d248
--- /dev/null
+++ b/src/main/java/baseball/Application.java
@@ -0,0 +1,15 @@
+package baseball;
+
+import baseball.controller.BaseballController;
+import baseball.view.InputView;
+import baseball.view.OutputView;
+
+public class Application {
+    public static void main(String[] args) {
+        BaseballController baseballController = new BaseballController(
+                new InputView(),
+                new OutputView()
+        );
+        baseballController.run();
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/baseball/controller/BaseballController.java b/src/main/java/baseball/controller/BaseballController.java
new file mode 100644
index 00000000..4bb56097
--- /dev/null
+++ b/src/main/java/baseball/controller/BaseballController.java
@@ -0,0 +1,29 @@
+package baseball.controller;
+
+import baseball.global.exception.CustomException;
+import baseball.global.message.InputMessage;
+import baseball.view.InputView;
+import baseball.view.OutputView;
+
+public class BaseballController {
+    private final InputView inputView;
+    private final OutputView outputView;
+
+    public BaseballController(InputView inputView, OutputView outputView) {
+        this.inputView = inputView;
+        this.outputView = outputView;
+    }
+
+    public void run() {
+        requestNumbers();
+    }
+
+    private void requestNumbers() {
+        outputView.printlnMessage(InputMessage.INPUT_NUMBERS.getMessage());
+        try {
+            inputView.enterNumbers();
+        } catch (CustomException e) {
+
+        }
+    }
+}
diff --git a/src/main/java/baseball/global/exception/CustomException.java b/src/main/java/baseball/global/exception/CustomException.java
new file mode 100644
index 00000000..8fd4dfd1
--- /dev/null
+++ b/src/main/java/baseball/global/exception/CustomException.java
@@ -0,0 +1,13 @@
+package baseball.global.exception;
+
+import baseball.global.message.ErrorMessage;
+
+public class CustomException extends IllegalArgumentException {
+    private CustomException(ErrorMessage errorMessage) {
+        super(errorMessage.getMessage());
+    }
+
+    public static CustomException of(ErrorMessage errorMessage) {
+        return new CustomException(errorMessage);
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/baseball/global/message/ErrorMessage.java b/src/main/java/baseball/global/message/ErrorMessage.java
new file mode 100644
index 00000000..42e3f578
--- /dev/null
+++ b/src/main/java/baseball/global/message/ErrorMessage.java
@@ -0,0 +1,16 @@
+package baseball.global.message;
+
+public enum ErrorMessage {
+    ;
+
+    private final static String PREFIX = "[ERROR]";
+    private final String message;
+
+    ErrorMessage(String message) {
+        this.message = message;
+    }
+
+    public String getMessage() {
+        return PREFIX + " " + this.message;
+    }
+}
diff --git a/src/main/java/baseball/global/message/InputMessage.java b/src/main/java/baseball/global/message/InputMessage.java
new file mode 100644
index 00000000..a425cd1e
--- /dev/null
+++ b/src/main/java/baseball/global/message/InputMessage.java
@@ -0,0 +1,17 @@
+package baseball.global.message;
+
+public enum InputMessage {
+
+    INPUT_NUMBERS("숫자를 입력해주세요 :")
+    ;
+
+    private String message;
+
+    InputMessage(String message) {
+        this.message = message;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+}
diff --git a/src/main/java/baseball/view/InputView.java b/src/main/java/baseball/view/InputView.java
new file mode 100644
index 00000000..294776f3
--- /dev/null
+++ b/src/main/java/baseball/view/InputView.java
@@ -0,0 +1,15 @@
+package baseball.view;
+
+import java.io.Console;
+import java.util.Scanner;
+
+public class InputView {
+    public void enterNumbers() {
+        String input = readLine();
+    }
+
+    private String readLine() {
+        Scanner scanner = new Scanner(System.in);
+        return scanner.nextLine();
+    }
+}
diff --git a/src/main/java/baseball/view/OutputView.java b/src/main/java/baseball/view/OutputView.java
new file mode 100644
index 00000000..29033afd
--- /dev/null
+++ b/src/main/java/baseball/view/OutputView.java
@@ -0,0 +1,7 @@
+package baseball.view;
+
+public class OutputView {
+    public void printlnMessage(String message) {
+        System.out.println(message);
+    }
+}

From 9ec5388df79ecaca0d0691f4f9f5134f96ca851b Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 17:17:18 +0900
Subject: [PATCH 03/19] =?UTF-8?q?feat(InputView):=20=EC=82=AC=EC=9A=A9?=
 =?UTF-8?q?=EC=9E=90=20=EC=9E=85=EB=A0=A5=20=EA=B2=80=EC=A6=9D=20=EA=B8=B0?=
 =?UTF-8?q?=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 docs/README.md                                | 10 ++--
 .../baseball/global/message/ErrorMessage.java |  5 ++
 src/main/java/baseball/view/InputView.java    | 55 ++++++++++++++++++-
 3 files changed, 63 insertions(+), 7 deletions(-)

diff --git a/docs/README.md b/docs/README.md
index a3ceb43d..5c34865f 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -24,11 +24,11 @@
 - [x] `숫자를 입력해주세요 :`를 출력한다.
 - [x] 사용자에게 입력을 받는다.
 - [ ] 입력값을 검증한다.
-  - [ ] 빈 문자열이나 공백이면 에러를 반환한다.
-  - [ ] 입력이 숫자가 3개가 아니면 에러를 반환한다.
-  - [ ] 숫자에 0이 포함되어 있으면 에러를 반환한다.
-  - [ ] 숫자 3개가 아니면 에러를 반환한다.
-  - [ ] 서로 다른 숫자가 아니면 에러를 반환한다.
+  - [x] 빈 문자열이나 공백이면 에러를 반환한다.
+  - [x] 입력된 문자열의 길이가 3이 아니면 에러를 반환한다.
+  - [x] 3개 중에 하나라도 숫자가 아니면 에러를 반환한다. 
+  - [x] 숫자에 0이 포함되어 있으면 에러를 반환한다.
+  - [x] 서로 다른 숫자가 아니면 에러를 반환한다.
   - [ ] 에러를 반환한 경우에는 에러 메시지를 출력한 후에 입력을 다시 받는다.
 
 ### 게임 기능
diff --git a/src/main/java/baseball/global/message/ErrorMessage.java b/src/main/java/baseball/global/message/ErrorMessage.java
index 42e3f578..6fc813fb 100644
--- a/src/main/java/baseball/global/message/ErrorMessage.java
+++ b/src/main/java/baseball/global/message/ErrorMessage.java
@@ -1,6 +1,11 @@
 package baseball.global.message;
 
 public enum ErrorMessage {
+    BLANK_INPUT("빈 문자열이 입력되었습니다."),
+    INVALID_INPUT_LENGTH("3개를 입력해주세요"),
+    NON_DIGIT_CHARACTER_FOUND("모두 숫자로 입력해주세요"),
+    NON_POSITIVE_NUMBER_FOUND("모두 0보다 큰 양수로 입력해주세요."),
+    DUPLICATE_NUMBER_FOUND("서로 다른 숫자로 입력해주세요."),
     ;
 
     private final static String PREFIX = "[ERROR]";
diff --git a/src/main/java/baseball/view/InputView.java b/src/main/java/baseball/view/InputView.java
index 294776f3..49fe939e 100644
--- a/src/main/java/baseball/view/InputView.java
+++ b/src/main/java/baseball/view/InputView.java
@@ -1,11 +1,62 @@
 package baseball.view;
 
-import java.io.Console;
+import baseball.global.exception.CustomException;
+import baseball.global.message.ErrorMessage;
+
 import java.util.Scanner;
 
 public class InputView {
-    public void enterNumbers() {
+    public int[] enterNumbers() {
         String input = readLine();
+        validateStringFormat(input);
+        int[] nums = validateNumberFormat(input);
+        return nums;
+    }
+
+    private void validateStringFormat(String str) {
+        if (isEmptyOrBlank(str)) {
+            throw CustomException.of(ErrorMessage.BLANK_INPUT);
+        }
+        if (str.length() != 3) {
+            throw CustomException.of(ErrorMessage.INVALID_INPUT_LENGTH);
+        }
+    }
+
+    private int[] validateNumberFormat(String str) {
+        int[] nums = new int[3];
+        for (int i = 0; i < 3; i++) {
+            validateDigit(str.charAt(i));
+            int num = str.charAt(i) - '0';
+            validatePositiveNumber(num);
+        }
+        validateDuplicate(nums);
+        return nums;
+    }
+
+    private void validateDigit(char c) {
+        if (!Character.isDigit(c)) {
+            throw CustomException.of(ErrorMessage.NON_DIGIT_CHARACTER_FOUND);
+        }
+    }
+
+    private void validatePositiveNumber(int num) {
+        if (num <= 0) {
+            throw CustomException.of(ErrorMessage.NON_POSITIVE_NUMBER_FOUND);
+        }
+    }
+
+    private void validateDuplicate(int[] arr) {
+        if (hasDuplicate(arr)) {
+            throw CustomException.of(ErrorMessage.DUPLICATE_NUMBER_FOUND);
+        }
+    }
+
+    private boolean isEmptyOrBlank(String str) {
+        return str == null || str.isBlank();
+    }
+
+    public static boolean hasDuplicate(int[] arr) {
+        return arr[0] == arr[1] || arr[0] == arr[2] || arr[1] == arr[2];
     }
 
     private String readLine() {

From ec0ec0574bdb32b9777e402fcef54804423a8866 Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 17:23:04 +0900
Subject: [PATCH 04/19] =?UTF-8?q?feat(OuputView):=20=EC=97=90=EB=9F=AC?=
 =?UTF-8?q?=EB=A5=BC=20=EB=B0=98=ED=99=98=ED=95=9C=20=EA=B2=BD=EC=9A=B0?=
 =?UTF-8?q?=EC=97=90=20=EC=97=90=EB=9F=AC=20=EB=A9=94=EC=8B=9C=EC=A7=80=20?=
 =?UTF-8?q?=EC=B6=9C=EB=A0=A5=20=EB=B0=8F=20=EB=8B=A4=EC=8B=9C=20=EC=9E=85?=
 =?UTF-8?q?=EB=A0=A5=EB=B0=9B=EB=8F=84=EB=A1=9D=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 docs/README.md                                         |  4 ++--
 .../java/baseball/controller/BaseballController.java   | 10 +++++++---
 src/main/java/baseball/domain/Numbers.java             |  6 ++++++
 src/main/java/baseball/view/OutputView.java            |  9 +++++++++
 4 files changed, 24 insertions(+), 5 deletions(-)
 create mode 100644 src/main/java/baseball/domain/Numbers.java

diff --git a/docs/README.md b/docs/README.md
index 5c34865f..a0fd726c 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -23,13 +23,13 @@
 ### 사용자 입력 기능
 - [x] `숫자를 입력해주세요 :`를 출력한다.
 - [x] 사용자에게 입력을 받는다.
-- [ ] 입력값을 검증한다.
+- [x] 입력값을 검증한다.
   - [x] 빈 문자열이나 공백이면 에러를 반환한다.
   - [x] 입력된 문자열의 길이가 3이 아니면 에러를 반환한다.
   - [x] 3개 중에 하나라도 숫자가 아니면 에러를 반환한다. 
   - [x] 숫자에 0이 포함되어 있으면 에러를 반환한다.
   - [x] 서로 다른 숫자가 아니면 에러를 반환한다.
-  - [ ] 에러를 반환한 경우에는 에러 메시지를 출력한 후에 입력을 다시 받는다.
+  - [x] 에러를 반환한 경우에는 에러 메시지를 출력한 후에 입력을 다시 받는다.
 
 ### 게임 기능
 - [ ] 결과를 판단한다.
diff --git a/src/main/java/baseball/controller/BaseballController.java b/src/main/java/baseball/controller/BaseballController.java
index 4bb56097..fbf520d3 100644
--- a/src/main/java/baseball/controller/BaseballController.java
+++ b/src/main/java/baseball/controller/BaseballController.java
@@ -1,5 +1,6 @@
 package baseball.controller;
 
+import baseball.domain.Numbers;
 import baseball.global.exception.CustomException;
 import baseball.global.message.InputMessage;
 import baseball.view.InputView;
@@ -18,12 +19,15 @@ public void run() {
         requestNumbers();
     }
 
-    private void requestNumbers() {
+    private Numbers requestNumbers() {
         outputView.printlnMessage(InputMessage.INPUT_NUMBERS.getMessage());
         try {
-            inputView.enterNumbers();
+            Numbers numbers = new Numbers(inputView.enterNumbers());
+            outputView.printEmptyLine();
+            return numbers;
         } catch (CustomException e) {
-
+            outputView.printlnMessageWithEmptyLine(e.getMessage());
+            return requestNumbers();
         }
     }
 }
diff --git a/src/main/java/baseball/domain/Numbers.java b/src/main/java/baseball/domain/Numbers.java
new file mode 100644
index 00000000..2ceedd76
--- /dev/null
+++ b/src/main/java/baseball/domain/Numbers.java
@@ -0,0 +1,6 @@
+package baseball.domain;
+
+public class Numbers {
+    public Numbers(int[] arr) {
+    }
+}
diff --git a/src/main/java/baseball/view/OutputView.java b/src/main/java/baseball/view/OutputView.java
index 29033afd..266e7ef9 100644
--- a/src/main/java/baseball/view/OutputView.java
+++ b/src/main/java/baseball/view/OutputView.java
@@ -4,4 +4,13 @@ public class OutputView {
     public void printlnMessage(String message) {
         System.out.println(message);
     }
+
+    public void printEmptyLine() {
+        System.out.println();
+    }
+
+    public void printlnMessageWithEmptyLine(String message) {
+        printlnMessage(message);
+        printEmptyLine();
+    }
 }

From 6776d0b43d5373e8045a7d1a000aab351337f44d Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 17:35:18 +0900
Subject: [PATCH 05/19] =?UTF-8?q?feat(ComputerNumbers):=20=EC=BB=B4?=
 =?UTF-8?q?=ED=93=A8=ED=84=B0=EC=9D=98=20=EC=88=AB=EC=9E=90=EB=A5=BC=20?=
 =?UTF-8?q?=EC=83=9D=EC=84=B1=ED=95=98=EB=8A=94=20=EA=B8=B0=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 docs/README.md                                |  2 +-
 .../controller/BaseballController.java        |  4 +++-
 .../java/baseball/domain/ComputerNumbers.java | 24 +++++++++++++++++++
 src/main/java/baseball/domain/Number.java     |  9 +++++++
 src/main/java/baseball/domain/Numbers.java    | 13 ++++++++++
 .../java/baseball/domain/UserNumbers.java     |  4 ++++
 6 files changed, 54 insertions(+), 2 deletions(-)
 create mode 100644 src/main/java/baseball/domain/ComputerNumbers.java
 create mode 100644 src/main/java/baseball/domain/Number.java
 create mode 100644 src/main/java/baseball/domain/UserNumbers.java

diff --git a/docs/README.md b/docs/README.md
index a0fd726c..93ef8767 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -18,7 +18,7 @@
 # 📝 구현 기능 목록
 
 ### 게임 준비 기능
-- [ ] 컴퓨터는 1에서 9까지 서로 다른 임의의 수 3개를 선택하고 저장한다.
+- [x] 컴퓨터는 1에서 9까지 서로 다른 임의의 수 3개를 선택하고 저장한다.
 
 ### 사용자 입력 기능
 - [x] `숫자를 입력해주세요 :`를 출력한다.
diff --git a/src/main/java/baseball/controller/BaseballController.java b/src/main/java/baseball/controller/BaseballController.java
index fbf520d3..e02b2972 100644
--- a/src/main/java/baseball/controller/BaseballController.java
+++ b/src/main/java/baseball/controller/BaseballController.java
@@ -1,5 +1,6 @@
 package baseball.controller;
 
+import baseball.domain.ComputerNumbers;
 import baseball.domain.Numbers;
 import baseball.global.exception.CustomException;
 import baseball.global.message.InputMessage;
@@ -16,7 +17,8 @@ public BaseballController(InputView inputView, OutputView outputView) {
     }
 
     public void run() {
-        requestNumbers();
+        ComputerNumbers computerNumbers = new ComputerNumbers();
+        Numbers inputNumbers = requestNumbers();
     }
 
     private Numbers requestNumbers() {
diff --git a/src/main/java/baseball/domain/ComputerNumbers.java b/src/main/java/baseball/domain/ComputerNumbers.java
new file mode 100644
index 00000000..66fab256
--- /dev/null
+++ b/src/main/java/baseball/domain/ComputerNumbers.java
@@ -0,0 +1,24 @@
+package baseball.domain;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class ComputerNumbers {
+    private final Numbers numbers;
+
+    public ComputerNumbers() {
+        int[] randomNumbers = generateRandomNumbers();
+        this.numbers = new Numbers(randomNumbers);
+    }
+
+    private int[] generateRandomNumbers() {
+        List<Integer> allNumbers = new ArrayList<>();
+        for (int i = 1; i <= 9; i++) {
+            allNumbers.add(i);
+        }
+        Collections.shuffle(allNumbers);
+        int[] result = {allNumbers.get(0), allNumbers.get(1), allNumbers.get(2)};
+        return result;
+    }
+}
diff --git a/src/main/java/baseball/domain/Number.java b/src/main/java/baseball/domain/Number.java
new file mode 100644
index 00000000..8a542400
--- /dev/null
+++ b/src/main/java/baseball/domain/Number.java
@@ -0,0 +1,9 @@
+package baseball.domain;
+
+public class Number {
+    private final int num;
+
+    public Number(int num) {
+        this.num = num;
+    }
+}
diff --git a/src/main/java/baseball/domain/Numbers.java b/src/main/java/baseball/domain/Numbers.java
index 2ceedd76..c0e5348b 100644
--- a/src/main/java/baseball/domain/Numbers.java
+++ b/src/main/java/baseball/domain/Numbers.java
@@ -1,6 +1,19 @@
 package baseball.domain;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class Numbers {
+    private final List<Number> numbers;
+
     public Numbers(int[] arr) {
+        numbers = new ArrayList<>();
+        for (int num : arr) {
+            numbers.add(new Number(num));
+        }
+    }
+
+    private void result() {
+
     }
 }
diff --git a/src/main/java/baseball/domain/UserNumbers.java b/src/main/java/baseball/domain/UserNumbers.java
new file mode 100644
index 00000000..06ac46d4
--- /dev/null
+++ b/src/main/java/baseball/domain/UserNumbers.java
@@ -0,0 +1,4 @@
+package baseball.domain;
+
+public class UserNumbers {
+}

From 9c2bd7b50add6d73919bee75d2a3a57d77c1afed Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:02:03 +0900
Subject: [PATCH 06/19] =?UTF-8?q?feat(Result):=20=EA=B2=B0=EA=B3=BC?=
 =?UTF-8?q?=EB=A5=BC=20=ED=8C=90=EB=8B=A8=ED=95=98=EB=8A=94=20=EA=B8=B0?=
 =?UTF-8?q?=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 docs/README.md                                | 10 +++----
 .../controller/BaseballController.java        |  2 ++
 .../java/baseball/domain/ComputerNumbers.java |  8 ++++++
 src/main/java/baseball/domain/Number.java     |  4 +++
 src/main/java/baseball/domain/Numbers.java    | 17 +++++++++++
 src/main/java/baseball/domain/Result.java     | 28 +++++++++++++++++++
 src/main/java/baseball/domain/ResultType.java | 14 ++++++++++
 7 files changed, 78 insertions(+), 5 deletions(-)
 create mode 100644 src/main/java/baseball/domain/Result.java
 create mode 100644 src/main/java/baseball/domain/ResultType.java

diff --git a/docs/README.md b/docs/README.md
index 93ef8767..fbadaf55 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -32,11 +32,11 @@
   - [x] 에러를 반환한 경우에는 에러 메시지를 출력한 후에 입력을 다시 받는다.
 
 ### 게임 기능
-- [ ] 결과를 판단한다.
-  - [ ] 스트라이크와 볼 갯수를 센다.
-    - [ ] 같은 수가 같은 자리에 있으면 스트라이크를 추가한다.
-    - [ ] 같은 수가 다른 자리에 있으면 볼을 추가한다.
-  - [ ] 스트라이크와 볼이 없으면 낫싱으로 판단한다.
+- [x] 결과를 판단한다.
+  - [x] 스트라이크와 볼 갯수를 센다.
+    - [x] 같은 수가 같은 자리에 있으면 스트라이크를 추가한다.
+    - [x] 같은 수가 다른 자리에 있으면 볼을 추가한다.
+  - [x] 스트라이크와 볼이 없으면 낫싱으로 판단한다.
 - [ ] 결과를 출력한다.
 - [ ] 정답이 아니면 `숫자를 입력해주세요 :`를 출력하고 사용자에게 다시 입력을 받는다.
 
diff --git a/src/main/java/baseball/controller/BaseballController.java b/src/main/java/baseball/controller/BaseballController.java
index e02b2972..150a1b88 100644
--- a/src/main/java/baseball/controller/BaseballController.java
+++ b/src/main/java/baseball/controller/BaseballController.java
@@ -2,6 +2,7 @@
 
 import baseball.domain.ComputerNumbers;
 import baseball.domain.Numbers;
+import baseball.domain.Result;
 import baseball.global.exception.CustomException;
 import baseball.global.message.InputMessage;
 import baseball.view.InputView;
@@ -19,6 +20,7 @@ public BaseballController(InputView inputView, OutputView outputView) {
     public void run() {
         ComputerNumbers computerNumbers = new ComputerNumbers();
         Numbers inputNumbers = requestNumbers();
+        Result result = new Result(computerNumbers, inputNumbers);
     }
 
     private Numbers requestNumbers() {
diff --git a/src/main/java/baseball/domain/ComputerNumbers.java b/src/main/java/baseball/domain/ComputerNumbers.java
index 66fab256..f9b37026 100644
--- a/src/main/java/baseball/domain/ComputerNumbers.java
+++ b/src/main/java/baseball/domain/ComputerNumbers.java
@@ -21,4 +21,12 @@ private int[] generateRandomNumbers() {
         int[] result = {allNumbers.get(0), allNumbers.get(1), allNumbers.get(2)};
         return result;
     }
+
+    public Number get(int idx) {
+        return numbers.get(idx);
+    }
+
+    public boolean notContain(Number number) {
+        return numbers.notContain(number);
+    }
 }
diff --git a/src/main/java/baseball/domain/Number.java b/src/main/java/baseball/domain/Number.java
index 8a542400..3c90f774 100644
--- a/src/main/java/baseball/domain/Number.java
+++ b/src/main/java/baseball/domain/Number.java
@@ -6,4 +6,8 @@ public class Number {
     public Number(int num) {
         this.num = num;
     }
+
+    public boolean isSameValue(Number number) {
+        return this.num == number.num;
+    }
 }
diff --git a/src/main/java/baseball/domain/Numbers.java b/src/main/java/baseball/domain/Numbers.java
index c0e5348b..a4ee89c3 100644
--- a/src/main/java/baseball/domain/Numbers.java
+++ b/src/main/java/baseball/domain/Numbers.java
@@ -16,4 +16,21 @@ public Numbers(int[] arr) {
     private void result() {
 
     }
+
+    public Number get(int idx) {
+        return numbers.get(idx);
+    }
+
+    public boolean notContain(Number inputNumber) {
+        for (Number number: numbers) {
+            if (number.isSameValue(inputNumber)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public int size() {
+        return numbers.size();
+    }
 }
diff --git a/src/main/java/baseball/domain/Result.java b/src/main/java/baseball/domain/Result.java
new file mode 100644
index 00000000..1294d887
--- /dev/null
+++ b/src/main/java/baseball/domain/Result.java
@@ -0,0 +1,28 @@
+package baseball.domain;
+
+public class Result {
+
+    private final ResultType resultType;
+    private final int strike;
+    private final int ball;
+
+    public Result(ComputerNumbers computerNumbers, Numbers inputNumbers) {
+        int strike = 0;
+        int ball = 0;
+        for (int idx = 0; idx < inputNumbers.size(); idx++) {
+            Number number = inputNumbers.get(idx);
+            if (computerNumbers.notContain(number)) {
+                continue;
+            }
+            if (number.isSameValue(computerNumbers.get(idx))) {
+                strike++;
+                continue;
+            }
+            ball++;
+        }
+        this.strike = strike;
+        this.ball = ball;
+        this.resultType = ResultType.getResult(strike, ball);
+    }
+
+}
diff --git a/src/main/java/baseball/domain/ResultType.java b/src/main/java/baseball/domain/ResultType.java
new file mode 100644
index 00000000..9ed623be
--- /dev/null
+++ b/src/main/java/baseball/domain/ResultType.java
@@ -0,0 +1,14 @@
+package baseball.domain;
+
+public enum ResultType {
+    STRIKE_AND_BALL,
+    NOTHING
+    ;
+
+    public static ResultType getResult(int strike, int ball) {
+        if (strike == 0 && ball == 0) {
+            return NOTHING;
+        }
+        return STRIKE_AND_BALL;
+    }
+}

From e6ec55fda12f0d7bf609bd583b20112fac0f056a Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:11:48 +0900
Subject: [PATCH 07/19] =?UTF-8?q?feat(OutputView):=20=EC=8A=A4=ED=8A=B8?=
 =?UTF-8?q?=EB=9D=BC=EC=9D=B4=ED=81=AC=20=EB=B0=8F=20=EB=B3=BC=20=ED=9A=9F?=
 =?UTF-8?q?=EC=88=98=EB=A5=BC=20=EC=B6=9C=EB=A0=A5=ED=95=98=EB=8A=94=20?=
 =?UTF-8?q?=EA=B8=B0=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 docs/README.md                                |  2 +-
 .../controller/BaseballController.java        | 16 ++++++++++-
 src/main/java/baseball/domain/Result.java     | 11 ++++++++
 src/main/java/baseball/domain/ResultType.java | 10 ++++---
 src/main/java/baseball/view/OutputView.java   | 27 +++++++++++++++++++
 5 files changed, 61 insertions(+), 5 deletions(-)

diff --git a/docs/README.md b/docs/README.md
index fbadaf55..c27ce467 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -37,7 +37,7 @@
     - [x] 같은 수가 같은 자리에 있으면 스트라이크를 추가한다.
     - [x] 같은 수가 다른 자리에 있으면 볼을 추가한다.
   - [x] 스트라이크와 볼이 없으면 낫싱으로 판단한다.
-- [ ] 결과를 출력한다.
+- [x] 결과를 출력한다.
 - [ ] 정답이 아니면 `숫자를 입력해주세요 :`를 출력하고 사용자에게 다시 입력을 받는다.
 
 ### 게임 종료 기능
diff --git a/src/main/java/baseball/controller/BaseballController.java b/src/main/java/baseball/controller/BaseballController.java
index 150a1b88..4cb26ac6 100644
--- a/src/main/java/baseball/controller/BaseballController.java
+++ b/src/main/java/baseball/controller/BaseballController.java
@@ -3,6 +3,7 @@
 import baseball.domain.ComputerNumbers;
 import baseball.domain.Numbers;
 import baseball.domain.Result;
+import baseball.domain.ResultType;
 import baseball.global.exception.CustomException;
 import baseball.global.message.InputMessage;
 import baseball.view.InputView;
@@ -20,7 +21,6 @@ public BaseballController(InputView inputView, OutputView outputView) {
     public void run() {
         ComputerNumbers computerNumbers = new ComputerNumbers();
         Numbers inputNumbers = requestNumbers();
-        Result result = new Result(computerNumbers, inputNumbers);
     }
 
     private Numbers requestNumbers() {
@@ -34,4 +34,18 @@ private Numbers requestNumbers() {
             return requestNumbers();
         }
     }
+
+    private void checkResult(ComputerNumbers computerNumbers, Numbers inputNumbers) {
+        Result result = new Result(computerNumbers, inputNumbers);
+        outputView.printStrikeAndBall(result);
+        if (result.getResultType() == ResultType.THREE_STRIKE) {
+            outputView.printThreeStrikeResult(result);
+            return;
+        }
+        if (result.getResultType() == ResultType.STRIKE_AND_BALL) {
+
+            return;
+        }
+
+    }
 }
diff --git a/src/main/java/baseball/domain/Result.java b/src/main/java/baseball/domain/Result.java
index 1294d887..5c47a248 100644
--- a/src/main/java/baseball/domain/Result.java
+++ b/src/main/java/baseball/domain/Result.java
@@ -25,4 +25,15 @@ public Result(ComputerNumbers computerNumbers, Numbers inputNumbers) {
         this.resultType = ResultType.getResult(strike, ball);
     }
 
+    public ResultType getResultType() {
+        return resultType;
+    }
+
+    public int getStrike() {
+        return strike;
+    }
+
+    public int getBall() {
+        return ball;
+    }
 }
diff --git a/src/main/java/baseball/domain/ResultType.java b/src/main/java/baseball/domain/ResultType.java
index 9ed623be..f58c2a45 100644
--- a/src/main/java/baseball/domain/ResultType.java
+++ b/src/main/java/baseball/domain/ResultType.java
@@ -1,14 +1,18 @@
 package baseball.domain;
 
 public enum ResultType {
+    THREE_STRIKE,
     STRIKE_AND_BALL,
     NOTHING
     ;
 
     public static ResultType getResult(int strike, int ball) {
-        if (strike == 0 && ball == 0) {
-            return NOTHING;
+        if (strike == 3) {
+            return THREE_STRIKE;
         }
-        return STRIKE_AND_BALL;
+        if (strike != 0 || ball != 0) {
+            return STRIKE_AND_BALL;
+        }
+        return NOTHING;
     }
 }
diff --git a/src/main/java/baseball/view/OutputView.java b/src/main/java/baseball/view/OutputView.java
index 266e7ef9..87d920e3 100644
--- a/src/main/java/baseball/view/OutputView.java
+++ b/src/main/java/baseball/view/OutputView.java
@@ -1,5 +1,8 @@
 package baseball.view;
 
+import baseball.domain.Result;
+import baseball.domain.ResultType;
+
 public class OutputView {
     public void printlnMessage(String message) {
         System.out.println(message);
@@ -13,4 +16,28 @@ public void printlnMessageWithEmptyLine(String message) {
         printlnMessage(message);
         printEmptyLine();
     }
+
+    public void printStrikeAndBall(Result result) {
+        if (result.getResultType() == ResultType.STRIKE_AND_BALL) {
+            StringBuilder sb = new StringBuilder();
+            appendStrike(result, sb);
+            appendBall(result, sb);
+            printlnMessage(sb.toString());
+        }
+    }
+
+    private void appendStrike(Result result, StringBuilder sb) {
+        if (result.getStrike() != 0) {
+            sb.append(result.getStrike()).append("스트라이크");
+        }
+    }
+
+    private void appendBall(Result result, StringBuilder sb) {
+        if (result.getBall() != 0) {
+            if (!sb.isEmpty()) {
+                sb.append(" ");
+            }
+            sb.append(result.getBall()).append("볼");
+        }
+    }
 }

From 4b09589b02a0d02488f31c74bb6162a85cf5203f Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:29:20 +0900
Subject: [PATCH 08/19] =?UTF-8?q?feat(BaseballController):=20=EA=B2=8C?=
 =?UTF-8?q?=EC=9E=84=20=EC=A2=85=EB=A3=8C=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC?=
 =?UTF-8?q?=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 docs/README.md                                | 16 +++++------
 .../controller/BaseballController.java        | 28 +++++++++----------
 .../baseball/global/message/ErrorMessage.java |  1 +
 src/main/java/baseball/view/InputView.java    | 16 +++++++++++
 src/main/java/baseball/view/OutputView.java   |  7 ++++-
 5 files changed, 45 insertions(+), 23 deletions(-)

diff --git a/docs/README.md b/docs/README.md
index c27ce467..6a2a10a3 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -38,13 +38,13 @@
     - [x] 같은 수가 다른 자리에 있으면 볼을 추가한다.
   - [x] 스트라이크와 볼이 없으면 낫싱으로 판단한다.
 - [x] 결과를 출력한다.
-- [ ] 정답이 아니면 `숫자를 입력해주세요 :`를 출력하고 사용자에게 다시 입력을 받는다.
+- [x] 정답이 아니면 `숫자를 입력해주세요 :`를 출력하고 사용자에게 다시 입력을 받는다.
 
 ### 게임 종료 기능
-- [ ] `3개의 숫자를 모두 맞히셨습니다! 게임 끝`를 출력하고 종료한다.
-- [ ] `게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.`를 출력한다.
-- [ ] 사용자에게 1 또는 2를 입력받는다.
-- [ ] 다른 값인 경우에는 에러를 반환한다.
-  - [ ] 에러를 반환한 경우에는 에러 메시지를 출력한 후에 입력을 다시 받는다.
-- [ ] 1을 입력받은 경우 게임 준비 기능부터 게임을 새로 시작한다.
-- [ ] 2를 입력받은 경우 게임을 종료한다.
+- [x] `3개의 숫자를 모두 맞히셨습니다! 게임 끝`를 출력하고 종료한다.
+- [x] `게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.`를 출력한다.
+- [x] 사용자에게 1 또는 2를 입력받는다.
+- [x] 다른 값인 경우에는 에러를 반환한다.
+  - [x] 에러를 반환한 경우에는 에러 메시지를 출력한 후에 입력을 다시 받는다.
+- [x] 1을 입력받은 경우 게임 준비 기능부터 게임을 새로 시작한다.
+- [x] 2를 입력받은 경우 게임을 종료한다.
diff --git a/src/main/java/baseball/controller/BaseballController.java b/src/main/java/baseball/controller/BaseballController.java
index 4cb26ac6..b0c6240e 100644
--- a/src/main/java/baseball/controller/BaseballController.java
+++ b/src/main/java/baseball/controller/BaseballController.java
@@ -20,7 +20,21 @@ public BaseballController(InputView inputView, OutputView outputView) {
 
     public void run() {
         ComputerNumbers computerNumbers = new ComputerNumbers();
+        process(computerNumbers);
+    }
+
+    public void process(ComputerNumbers computerNumbers) {
         Numbers inputNumbers = requestNumbers();
+        Result result = new Result(computerNumbers, inputNumbers);
+        outputView.printlnStrikeAndBall(result);
+        if (result.getResultType() != ResultType.THREE_STRIKE) {
+            process(computerNumbers);
+            return;
+        }
+        outputView.printlnThreeStrike();
+        if (inputView.enterFinishType() == 1) {
+            run();
+        }
     }
 
     private Numbers requestNumbers() {
@@ -34,18 +48,4 @@ private Numbers requestNumbers() {
             return requestNumbers();
         }
     }
-
-    private void checkResult(ComputerNumbers computerNumbers, Numbers inputNumbers) {
-        Result result = new Result(computerNumbers, inputNumbers);
-        outputView.printStrikeAndBall(result);
-        if (result.getResultType() == ResultType.THREE_STRIKE) {
-            outputView.printThreeStrikeResult(result);
-            return;
-        }
-        if (result.getResultType() == ResultType.STRIKE_AND_BALL) {
-
-            return;
-        }
-
-    }
 }
diff --git a/src/main/java/baseball/global/message/ErrorMessage.java b/src/main/java/baseball/global/message/ErrorMessage.java
index 6fc813fb..43dcb3a2 100644
--- a/src/main/java/baseball/global/message/ErrorMessage.java
+++ b/src/main/java/baseball/global/message/ErrorMessage.java
@@ -6,6 +6,7 @@ public enum ErrorMessage {
     NON_DIGIT_CHARACTER_FOUND("모두 숫자로 입력해주세요"),
     NON_POSITIVE_NUMBER_FOUND("모두 0보다 큰 양수로 입력해주세요."),
     DUPLICATE_NUMBER_FOUND("서로 다른 숫자로 입력해주세요."),
+    INVALID_FINISH_INPUT("게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.")
     ;
 
     private final static String PREFIX = "[ERROR]";
diff --git a/src/main/java/baseball/view/InputView.java b/src/main/java/baseball/view/InputView.java
index 49fe939e..3ae30cd0 100644
--- a/src/main/java/baseball/view/InputView.java
+++ b/src/main/java/baseball/view/InputView.java
@@ -63,4 +63,20 @@ private String readLine() {
         Scanner scanner = new Scanner(System.in);
         return scanner.nextLine();
     }
+
+    public int enterFinishType() {
+        String input = readLine();
+        if (input.length() != 1) {
+            throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
+        }
+        char c = input.charAt(0);
+        if (!Character.isDigit(c)) {
+            throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
+        }
+        int num = input.charAt(0) - '0';
+        if (num != 0 && num != 1) {
+            throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
+        }
+        return num;
+    }
 }
diff --git a/src/main/java/baseball/view/OutputView.java b/src/main/java/baseball/view/OutputView.java
index 87d920e3..e2ff8e61 100644
--- a/src/main/java/baseball/view/OutputView.java
+++ b/src/main/java/baseball/view/OutputView.java
@@ -17,7 +17,7 @@ public void printlnMessageWithEmptyLine(String message) {
         printEmptyLine();
     }
 
-    public void printStrikeAndBall(Result result) {
+    public void printlnStrikeAndBall(Result result) {
         if (result.getResultType() == ResultType.STRIKE_AND_BALL) {
             StringBuilder sb = new StringBuilder();
             appendStrike(result, sb);
@@ -40,4 +40,9 @@ private void appendBall(Result result, StringBuilder sb) {
             sb.append(result.getBall()).append("볼");
         }
     }
+
+    public void printlnThreeStrike() {
+        System.out.println("3개의 숫자를 모두 맞히셨습니다! 게임 끝");
+        System.out.println("게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.");
+    }
 }

From 52ca44a784b9871cbde444977ebfc003f0ae5003 Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:31:05 +0900
Subject: [PATCH 09/19] =?UTF-8?q?refac(InputMessage):=20=EC=88=AB=EC=9E=90?=
 =?UTF-8?q?=20=EC=9E=85=EB=A0=A5=20=EC=95=88=EB=82=B4=20=EB=A9=94=EC=8B=9C?=
 =?UTF-8?q?=EC=A7=80=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/baseball/controller/BaseballController.java | 2 +-
 src/main/java/baseball/global/message/InputMessage.java   | 2 +-
 src/main/java/baseball/view/OutputView.java               | 4 ++++
 3 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/main/java/baseball/controller/BaseballController.java b/src/main/java/baseball/controller/BaseballController.java
index b0c6240e..db493453 100644
--- a/src/main/java/baseball/controller/BaseballController.java
+++ b/src/main/java/baseball/controller/BaseballController.java
@@ -38,7 +38,7 @@ public void process(ComputerNumbers computerNumbers) {
     }
 
     private Numbers requestNumbers() {
-        outputView.printlnMessage(InputMessage.INPUT_NUMBERS.getMessage());
+        outputView.printMessage(InputMessage.INPUT_NUMBERS.getMessage());
         try {
             Numbers numbers = new Numbers(inputView.enterNumbers());
             outputView.printEmptyLine();
diff --git a/src/main/java/baseball/global/message/InputMessage.java b/src/main/java/baseball/global/message/InputMessage.java
index a425cd1e..fd41ed23 100644
--- a/src/main/java/baseball/global/message/InputMessage.java
+++ b/src/main/java/baseball/global/message/InputMessage.java
@@ -2,7 +2,7 @@
 
 public enum InputMessage {
 
-    INPUT_NUMBERS("숫자를 입력해주세요 :")
+    INPUT_NUMBERS("숫자를 입력해주세요 : ")
     ;
 
     private String message;
diff --git a/src/main/java/baseball/view/OutputView.java b/src/main/java/baseball/view/OutputView.java
index e2ff8e61..2bb315a8 100644
--- a/src/main/java/baseball/view/OutputView.java
+++ b/src/main/java/baseball/view/OutputView.java
@@ -8,6 +8,10 @@ public void printlnMessage(String message) {
         System.out.println(message);
     }
 
+    public void printMessage(String message) {
+        System.out.print(message);
+    }
+
     public void printEmptyLine() {
         System.out.println();
     }

From a5e57b1b8b8a7c25d22b599e81ad5010644269b3 Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:32:56 +0900
Subject: [PATCH 10/19] =?UTF-8?q?refac(InputView):=20=EC=9E=85=EB=A0=A5?=
 =?UTF-8?q?=EB=90=9C=20=EC=88=AB=EC=9E=90=20=EC=A0=80=EC=9E=A5=EC=95=88?=
 =?UTF-8?q?=EB=90=98=EB=8A=94=20=EC=98=A4=EB=A5=98=20=ED=95=B4=EA=B2=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/baseball/view/InputView.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/main/java/baseball/view/InputView.java b/src/main/java/baseball/view/InputView.java
index 3ae30cd0..435940f4 100644
--- a/src/main/java/baseball/view/InputView.java
+++ b/src/main/java/baseball/view/InputView.java
@@ -28,6 +28,7 @@ private int[] validateNumberFormat(String str) {
             validateDigit(str.charAt(i));
             int num = str.charAt(i) - '0';
             validatePositiveNumber(num);
+            nums[i] = num;
         }
         validateDuplicate(nums);
         return nums;

From d13b35552d10092eebbd7a254fc1438ade6639dd Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:35:04 +0900
Subject: [PATCH 11/19] =?UTF-8?q?refac(InputView):=20=EA=B2=8C=EC=9E=84=20?=
 =?UTF-8?q?=EC=A2=85=EB=A3=8C=EC=8B=9C=20=EC=9E=85=EB=A0=A5=EB=B0=9B?=
 =?UTF-8?q?=EB=8A=94=20=EC=88=AB=EC=9E=90=20=EB=A1=9C=EC=A7=81=20=EC=97=90?=
 =?UTF-8?q?=EB=9F=AC=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/baseball/view/InputView.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/baseball/view/InputView.java b/src/main/java/baseball/view/InputView.java
index 435940f4..d0d23a14 100644
--- a/src/main/java/baseball/view/InputView.java
+++ b/src/main/java/baseball/view/InputView.java
@@ -75,7 +75,7 @@ public int enterFinishType() {
             throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
         }
         int num = input.charAt(0) - '0';
-        if (num != 0 && num != 1) {
+        if (num != 1 && num != 2) {
             throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
         }
         return num;

From 1c8267464bc330cbc1170917af7893d1a1ffc83d Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:39:11 +0900
Subject: [PATCH 12/19] =?UTF-8?q?refac(Numbers):=20=EC=82=AC=EC=9A=A9?=
 =?UTF-8?q?=ED=95=98=EC=A7=80=20=EC=95=8A=EB=8A=94=20=EB=A9=94=EC=86=8C?=
 =?UTF-8?q?=EB=93=9C=20=EC=82=AD=EC=A0=9C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/baseball/domain/Numbers.java     | 4 ----
 src/main/java/baseball/domain/UserNumbers.java | 4 ----
 2 files changed, 8 deletions(-)
 delete mode 100644 src/main/java/baseball/domain/UserNumbers.java

diff --git a/src/main/java/baseball/domain/Numbers.java b/src/main/java/baseball/domain/Numbers.java
index a4ee89c3..219a7078 100644
--- a/src/main/java/baseball/domain/Numbers.java
+++ b/src/main/java/baseball/domain/Numbers.java
@@ -13,10 +13,6 @@ public Numbers(int[] arr) {
         }
     }
 
-    private void result() {
-
-    }
-
     public Number get(int idx) {
         return numbers.get(idx);
     }
diff --git a/src/main/java/baseball/domain/UserNumbers.java b/src/main/java/baseball/domain/UserNumbers.java
deleted file mode 100644
index 06ac46d4..00000000
--- a/src/main/java/baseball/domain/UserNumbers.java
+++ /dev/null
@@ -1,4 +0,0 @@
-package baseball.domain;
-
-public class UserNumbers {
-}

From 7855fb5359d208f22035fecd5a537b03a7509a27 Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:44:32 +0900
Subject: [PATCH 13/19] =?UTF-8?q?refac(InputView):=20=EB=A9=94=EC=86=8C?=
 =?UTF-8?q?=EB=93=9C=20=EC=9C=84=EC=B9=98=20=EB=B3=80=EA=B2=BD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/baseball/view/InputView.java | 35 +++++++++++-----------
 1 file changed, 18 insertions(+), 17 deletions(-)

diff --git a/src/main/java/baseball/view/InputView.java b/src/main/java/baseball/view/InputView.java
index d0d23a14..39426b64 100644
--- a/src/main/java/baseball/view/InputView.java
+++ b/src/main/java/baseball/view/InputView.java
@@ -6,6 +6,7 @@
 import java.util.Scanner;
 
 public class InputView {
+
     public int[] enterNumbers() {
         String input = readLine();
         validateStringFormat(input);
@@ -13,6 +14,22 @@ public int[] enterNumbers() {
         return nums;
     }
 
+    public int enterFinishType() {
+        String input = readLine();
+        if (input.length() != 1) {
+            throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
+        }
+        char c = input.charAt(0);
+        if (!Character.isDigit(c)) {
+            throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
+        }
+        int num = input.charAt(0) - '0';
+        if (num != 1 && num != 2) {
+            throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
+        }
+        return num;
+    }
+
     private void validateStringFormat(String str) {
         if (isEmptyOrBlank(str)) {
             throw CustomException.of(ErrorMessage.BLANK_INPUT);
@@ -56,7 +73,7 @@ private boolean isEmptyOrBlank(String str) {
         return str == null || str.isBlank();
     }
 
-    public static boolean hasDuplicate(int[] arr) {
+    private static boolean hasDuplicate(int[] arr) {
         return arr[0] == arr[1] || arr[0] == arr[2] || arr[1] == arr[2];
     }
 
@@ -64,20 +81,4 @@ private String readLine() {
         Scanner scanner = new Scanner(System.in);
         return scanner.nextLine();
     }
-
-    public int enterFinishType() {
-        String input = readLine();
-        if (input.length() != 1) {
-            throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
-        }
-        char c = input.charAt(0);
-        if (!Character.isDigit(c)) {
-            throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
-        }
-        int num = input.charAt(0) - '0';
-        if (num != 1 && num != 2) {
-            throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
-        }
-        return num;
-    }
 }

From d0dcf1d04381ab0545fce5a1267bd17a16721883 Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:47:30 +0900
Subject: [PATCH 14/19] =?UTF-8?q?refac(OutputView):=20=EA=B8=B0=EC=A1=B4?=
 =?UTF-8?q?=20=EB=A9=94=EC=86=8C=EB=93=9C=20=EC=82=AC=EC=9A=A9=ED=95=98?=
 =?UTF-8?q?=EB=8F=84=EB=A1=9D=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/baseball/view/OutputView.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/java/baseball/view/OutputView.java b/src/main/java/baseball/view/OutputView.java
index 2bb315a8..ea5b1e03 100644
--- a/src/main/java/baseball/view/OutputView.java
+++ b/src/main/java/baseball/view/OutputView.java
@@ -46,7 +46,7 @@ private void appendBall(Result result, StringBuilder sb) {
     }
 
     public void printlnThreeStrike() {
-        System.out.println("3개의 숫자를 모두 맞히셨습니다! 게임 끝");
-        System.out.println("게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.");
+        printlnMessage("3개의 숫자를 모두 맞히셨습니다! 게임 끝");
+        printlnMessage("게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.");
     }
 }

From 77ce253edb5f36a64564decb3705fd41055dceb0 Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:48:39 +0900
Subject: [PATCH 15/19] =?UTF-8?q?refac(OutputView):=20=EC=8A=A4=ED=8A=B8?=
 =?UTF-8?q?=EB=9D=BC=EC=9D=B4=ED=81=AC=20=EB=B3=BC=20=EC=B6=9C=EB=A0=A5=20?=
 =?UTF-8?q?=EB=A1=9C=EC=A7=81=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/baseball/view/OutputView.java | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/main/java/baseball/view/OutputView.java b/src/main/java/baseball/view/OutputView.java
index ea5b1e03..b4e4a842 100644
--- a/src/main/java/baseball/view/OutputView.java
+++ b/src/main/java/baseball/view/OutputView.java
@@ -22,12 +22,10 @@ public void printlnMessageWithEmptyLine(String message) {
     }
 
     public void printlnStrikeAndBall(Result result) {
-        if (result.getResultType() == ResultType.STRIKE_AND_BALL) {
-            StringBuilder sb = new StringBuilder();
-            appendStrike(result, sb);
-            appendBall(result, sb);
-            printlnMessage(sb.toString());
-        }
+        StringBuilder sb = new StringBuilder();
+        appendStrike(result, sb);
+        appendBall(result, sb);
+        printlnMessage(sb.toString());
     }
 
     private void appendStrike(Result result, StringBuilder sb) {

From 57d0c3871ff5ab9c083740fa8b2a829baf343aca Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:52:54 +0900
Subject: [PATCH 16/19] =?UTF-8?q?refac(InputView):=20=EB=A9=94=EC=86=8C?=
 =?UTF-8?q?=EB=93=9C=20=EB=B6=84=EB=A6=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/baseball/view/InputView.java | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/main/java/baseball/view/InputView.java b/src/main/java/baseball/view/InputView.java
index 39426b64..a76a6c69 100644
--- a/src/main/java/baseball/view/InputView.java
+++ b/src/main/java/baseball/view/InputView.java
@@ -16,11 +16,12 @@ public int[] enterNumbers() {
 
     public int enterFinishType() {
         String input = readLine();
-        if (input.length() != 1) {
-            throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
-        }
-        char c = input.charAt(0);
-        if (!Character.isDigit(c)) {
+        int num = parseFinishType(input);
+        return num;
+    }
+
+    private int parseFinishType(String input) {
+        if (input.length() != 1 || !Character.isDigit(input.charAt(0))) {
             throw CustomException.of(ErrorMessage.INVALID_FINISH_INPUT);
         }
         int num = input.charAt(0) - '0';

From f680c1f005dc04877434a3b7978d25ec792b748a Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Wed, 28 Jan 2026 18:56:35 +0900
Subject: [PATCH 17/19] =?UTF-8?q?refac(OutputView):=20=EC=B6=9C=EB=A0=A5?=
 =?UTF-8?q?=20=EB=A1=9C=EC=A7=81=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/baseball/view/OutputView.java | 29 ++++++++++++---------
 1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/src/main/java/baseball/view/OutputView.java b/src/main/java/baseball/view/OutputView.java
index b4e4a842..f1bda9d8 100644
--- a/src/main/java/baseball/view/OutputView.java
+++ b/src/main/java/baseball/view/OutputView.java
@@ -23,28 +23,31 @@ public void printlnMessageWithEmptyLine(String message) {
 
     public void printlnStrikeAndBall(Result result) {
         StringBuilder sb = new StringBuilder();
-        appendStrike(result, sb);
-        appendBall(result, sb);
+        appendStrike(result.getStrike(), sb);
+        appendBall(result.getBall(), sb);
+        if (sb.isEmpty()) {
+            printlnMessage("낫싱");
+        }
         printlnMessage(sb.toString());
     }
 
-    private void appendStrike(Result result, StringBuilder sb) {
-        if (result.getStrike() != 0) {
-            sb.append(result.getStrike()).append("스트라이크");
+    public void printlnThreeStrike() {
+        printlnMessage("3개의 숫자를 모두 맞히셨습니다! 게임 끝");
+        printlnMessage("게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.");
+    }
+
+    private void appendStrike(int strike, StringBuilder sb) {
+        if (strike != 0) {
+            sb.append(strike).append("스트라이크");
         }
     }
 
-    private void appendBall(Result result, StringBuilder sb) {
-        if (result.getBall() != 0) {
+    private void appendBall(int ball, StringBuilder sb) {
+        if (ball != 0) {
             if (!sb.isEmpty()) {
                 sb.append(" ");
             }
-            sb.append(result.getBall()).append("볼");
+            sb.append(ball).append("볼");
         }
     }
-
-    public void printlnThreeStrike() {
-        printlnMessage("3개의 숫자를 모두 맞히셨습니다! 게임 끝");
-        printlnMessage("게임을 새로 시작하려면 1, 종료하려면 2를 입력하세요.");
-    }
 }

From 4452c1b24153527516963fb42c7ea4ac547c8813 Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Mon, 2 Feb 2026 18:47:38 +0900
Subject: [PATCH 18/19] =?UTF-8?q?refac(OutputView):=20=EC=B6=9C=EB=A0=A5?=
 =?UTF-8?q?=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/baseball/controller/BaseballController.java | 3 +--
 src/main/java/baseball/view/OutputView.java               | 7 ++++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/main/java/baseball/controller/BaseballController.java b/src/main/java/baseball/controller/BaseballController.java
index db493453..e0312d6f 100644
--- a/src/main/java/baseball/controller/BaseballController.java
+++ b/src/main/java/baseball/controller/BaseballController.java
@@ -41,10 +41,9 @@ private Numbers requestNumbers() {
         outputView.printMessage(InputMessage.INPUT_NUMBERS.getMessage());
         try {
             Numbers numbers = new Numbers(inputView.enterNumbers());
-            outputView.printEmptyLine();
             return numbers;
         } catch (CustomException e) {
-            outputView.printlnMessageWithEmptyLine(e.getMessage());
+            outputView.printlnMessage(e.getMessage());
             return requestNumbers();
         }
     }
diff --git a/src/main/java/baseball/view/OutputView.java b/src/main/java/baseball/view/OutputView.java
index f1bda9d8..54c46f4e 100644
--- a/src/main/java/baseball/view/OutputView.java
+++ b/src/main/java/baseball/view/OutputView.java
@@ -22,12 +22,13 @@ public void printlnMessageWithEmptyLine(String message) {
     }
 
     public void printlnStrikeAndBall(Result result) {
+        if (result.getResultType() == ResultType.NOTHING) {
+            printlnMessage("낫싱");
+            return;
+        }
         StringBuilder sb = new StringBuilder();
         appendStrike(result.getStrike(), sb);
         appendBall(result.getBall(), sb);
-        if (sb.isEmpty()) {
-            printlnMessage("낫싱");
-        }
         printlnMessage(sb.toString());
     }
 

From 25e0a8a361730f3c69924cd93f4acef5a5b2f55b Mon Sep 17 00:00:00 2001
From: YouTaegeun <dbxorms2310@naver.com>
Date: Fri, 6 Feb 2026 18:48:35 +0900
Subject: [PATCH 19/19] =?UTF-8?q?test(NumberTest):=20=EB=8F=84=EB=A9=94?=
 =?UTF-8?q?=EC=9D=B8=20=ED=85=8C=EC=8A=A4=ED=8A=B8=20=EC=BD=94=EB=93=9C=20?=
 =?UTF-8?q?=EC=83=9D=EC=84=B1?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../baseball/domain/ComputerNumbersTest.java  | 27 +++++++++
 src/test/java/baseball/domain/NumberTest.java | 24 ++++++++
 .../java/baseball/domain/NumbersTest.java     | 48 +++++++++++++++
 src/test/java/baseball/domain/ResultTest.java | 59 +++++++++++++++++++
 .../java/baseball/domain/ResultTypeTest.java  | 30 ++++++++++
 5 files changed, 188 insertions(+)
 create mode 100644 src/test/java/baseball/domain/ComputerNumbersTest.java
 create mode 100644 src/test/java/baseball/domain/NumberTest.java
 create mode 100644 src/test/java/baseball/domain/NumbersTest.java
 create mode 100644 src/test/java/baseball/domain/ResultTest.java
 create mode 100644 src/test/java/baseball/domain/ResultTypeTest.java

diff --git a/src/test/java/baseball/domain/ComputerNumbersTest.java b/src/test/java/baseball/domain/ComputerNumbersTest.java
new file mode 100644
index 00000000..e0c528c4
--- /dev/null
+++ b/src/test/java/baseball/domain/ComputerNumbersTest.java
@@ -0,0 +1,27 @@
+package baseball.domain;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+class ComputerNumbersTest {
+
+    @Test
+    void notContain_returnsFalse_forExistingNumberInstance() {
+        ComputerNumbers computerNumbers = new ComputerNumbers();
+
+        Number existingNumber = computerNumbers.get(0);
+
+        assertThat(computerNumbers.notContain(existingNumber)).isFalse();
+    }
+
+    @Test
+    void get_throwsIndexOutOfBounds_whenIndexIsInvalid() {
+        ComputerNumbers computerNumbers = new ComputerNumbers();
+
+        assertThatThrownBy(() -> computerNumbers.get(3))
+                .isInstanceOf(IndexOutOfBoundsException.class)
+                .hasMessageMatching("Index[: ]\\d+.*(Size|length)[: ]\\d+");
+    }
+}
diff --git a/src/test/java/baseball/domain/NumberTest.java b/src/test/java/baseball/domain/NumberTest.java
new file mode 100644
index 00000000..077a5bd7
--- /dev/null
+++ b/src/test/java/baseball/domain/NumberTest.java
@@ -0,0 +1,24 @@
+package baseball.domain;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class NumberTest {
+
+    @Test
+    void isSameValue_returnsTrue_whenValuesMatch() {
+        Number number = new Number(5);
+        Number sameValue = new Number(5);
+
+        assertThat(number.isSameValue(sameValue)).isTrue();
+    }
+
+    @Test
+    void isSameValue_returnsFalse_whenValuesDoNotMatch() {
+        Number number = new Number(5);
+        Number differentValue = new Number(7);
+
+        assertThat(number.isSameValue(differentValue)).isFalse();
+    }
+}
diff --git a/src/test/java/baseball/domain/NumbersTest.java b/src/test/java/baseball/domain/NumbersTest.java
new file mode 100644
index 00000000..9c1d2bae
--- /dev/null
+++ b/src/test/java/baseball/domain/NumbersTest.java
@@ -0,0 +1,48 @@
+package baseball.domain;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+
+class NumbersTest {
+
+    @Test
+    void size_returnsLengthOfInputArray() {
+        Numbers numbers = new Numbers(new int[]{1, 2, 3});
+
+        assertThat(numbers.size()).isEqualTo(3);
+    }
+
+    @Test
+    void get_returnsNumberAtIndex() {
+        Numbers numbers = new Numbers(new int[]{1, 2, 3});
+
+        Number number = numbers.get(0);
+
+        assertThat(number.isSameValue(new Number(1))).isTrue();
+    }
+
+    @Test
+    void notContain_returnsFalse_whenNumberExists() {
+        Numbers numbers = new Numbers(new int[]{1, 2, 3});
+
+        assertThat(numbers.notContain(new Number(2))).isFalse();
+    }
+
+    @Test
+    void notContain_returnsTrue_whenNumberDoesNotExist() {
+        Numbers numbers = new Numbers(new int[]{1, 2, 3});
+
+        assertThat(numbers.notContain(new Number(9))).isTrue();
+    }
+
+    @Test
+    void get_throwsIndexOutOfBounds_whenIndexIsInvalid() {
+        Numbers numbers = new Numbers(new int[]{1, 2});
+
+        assertThatExceptionOfType(IndexOutOfBoundsException.class)
+                .isThrownBy(() -> numbers.get(2))
+                .withMessageMatching("Index[: ]\\d+.*(Size|length)[: ]\\d+");
+    }
+}
diff --git a/src/test/java/baseball/domain/ResultTest.java b/src/test/java/baseball/domain/ResultTest.java
new file mode 100644
index 00000000..e268cd33
--- /dev/null
+++ b/src/test/java/baseball/domain/ResultTest.java
@@ -0,0 +1,59 @@
+package baseball.domain;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ResultTest {
+
+    private ComputerNumbers fixedComputerNumbers(int[] values) {
+        Numbers numbers = new Numbers(values);
+        return new ComputerNumbers() {
+            @Override
+            public Number get(int idx) {
+                return numbers.get(idx);
+            }
+
+            @Override
+            public boolean notContain(Number number) {
+                return numbers.notContain(number);
+            }
+        };
+    }
+
+    @Test
+    void result_countsThreeStrike_whenAllMatchInPosition() {
+        ComputerNumbers computerNumbers = fixedComputerNumbers(new int[]{1, 2, 3});
+        Numbers inputNumbers = new Numbers(new int[]{1, 2, 3});
+
+        Result result = new Result(computerNumbers, inputNumbers);
+
+        assertThat(result.getStrike()).isEqualTo(3);
+        assertThat(result.getBall()).isEqualTo(0);
+        assertThat(result.getResultType()).isEqualTo(ResultType.THREE_STRIKE);
+    }
+
+    @Test
+    void result_countsStrikeAndBall_whenValuesMatchDifferentPositions() {
+        ComputerNumbers computerNumbers = fixedComputerNumbers(new int[]{1, 2, 3});
+        Numbers inputNumbers = new Numbers(new int[]{1, 3, 2});
+
+        Result result = new Result(computerNumbers, inputNumbers);
+
+        assertThat(result.getStrike()).isEqualTo(1);
+        assertThat(result.getBall()).isEqualTo(2);
+        assertThat(result.getResultType()).isEqualTo(ResultType.STRIKE_AND_BALL);
+    }
+
+    @Test
+    void result_countsNothing_whenNoValuesMatch() {
+        ComputerNumbers computerNumbers = fixedComputerNumbers(new int[]{1, 2, 3});
+        Numbers inputNumbers = new Numbers(new int[]{4, 5, 6});
+
+        Result result = new Result(computerNumbers, inputNumbers);
+
+        assertThat(result.getStrike()).isEqualTo(0);
+        assertThat(result.getBall()).isEqualTo(0);
+        assertThat(result.getResultType()).isEqualTo(ResultType.NOTHING);
+    }
+}
diff --git a/src/test/java/baseball/domain/ResultTypeTest.java b/src/test/java/baseball/domain/ResultTypeTest.java
new file mode 100644
index 00000000..1128f8a9
--- /dev/null
+++ b/src/test/java/baseball/domain/ResultTypeTest.java
@@ -0,0 +1,30 @@
+package baseball.domain;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class ResultTypeTest {
+
+    @Test
+    void getResult_returnsThreeStrike_whenStrikeIsThree() {
+        ResultType result = ResultType.getResult(3, 0);
+
+        assertEquals(ResultType.THREE_STRIKE, result);
+        assertThat(result).isEqualTo(ResultType.THREE_STRIKE);
+    }
+
+    @Test
+    void getResult_returnsStrikeAndBall_whenAnyStrikeOrBall() {
+        assertThat(ResultType.getResult(1, 0)).isEqualTo(ResultType.STRIKE_AND_BALL);
+        assertThat(ResultType.getResult(0, 2)).isEqualTo(ResultType.STRIKE_AND_BALL);
+    }
+
+    @Test
+    void getResult_returnsNothing_whenNoStrikeAndNoBall() {
+        ResultType result = ResultType.getResult(0, 0);
+
+        assertEquals(ResultType.NOTHING, result);
+    }
+}