From 96ca9c99ba56bcdf6212c44b2401ae60b8f7a80f Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 16:03:01 +0900
Subject: [PATCH 01/20] =?UTF-8?q?docs:=20=EA=B5=AC=ED=98=84=ED=95=A0=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

---
 README.md | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

diff --git a/README.md b/README.md
index 15bb106b5..fe4dbdb85 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,67 @@
 # javascript-lotto-precourse
+# 3주차 - 로또
+
+## ⚙️ 간단한 프로젝트 실행 흐름
+1. 안내 문구를 출력한다.
+2. 로또 구입 금액을 입력받아 검증한다.(1,000원 단위)
+3. 구입 장수만큼 로또를 발행하고 오름차순으로 출력한다.
+4. 당첨 번호(6개, 쉼표 구분)를 입력받아 검증한다.
+5. 보너스 번호(1개)를 입력받아 검증한다.
+6. 구매 로또 vs 담청 번호를 비교해 등수별 개수를 계산한다.
+7. 총 수익률(소수점 둘째 자리 반올림)을 출력한다.
+8. 게임을 종료한다.
+(사용자가 잘못된 값을 입력할 경우 "[ERROR]로 시작하는 메시지와 함께 Error 발생 + 해당 메시지 출력 후 다음 해당 지점부터 다시 입력을 받는다.)
+
+
+## ⚠️ 고려사항
+- 로또 번호의 숫자 범위는 1~45이다.
+- 로또 번호 6개와 보너스 번호 1개는 중복되지 않는다.
+- 로또 구입 금액 입력 시, 그 금액에 해당하는 만큼 로또를 발행해야 한다.
+- 로또 1장 가격 : 1,000원
+
+
+## 🔧 구현할 기능 목록
+### 1. util
+- parser(문자열 -> 자료형 변환)
+    - [ ] parseAmount : 구입 금액 문자열 -> 정수
+    - [ ] parseWinningNumbers : 로또 담청 번호 문자열 -> 정수 배열
+    - [ ] parseBonusNumber : 보너스 번호 문자열 -> 정수
+
+- validator(입력 규칙 검증)
+    - [ ] validateAmount : 정수 여부, 1000원 단위, 최소 1000원
+    - [ ] validateTicketNumbers : 길이 6, 1~45, 중복 없음
+    - [ ] validateWinningNumbers : 길이 6, 1~45, 중복 없음
+    - [ ] validateBonusNumber : 1~45, 당첨 번호와 중복 불가
+
+- format(출력 포맷)
+    - [ ] formatTicket : `[1, 2, 5, 14, 22, 45]` 문자열화
+    - [ ] formatRate : 소수점 둘째 자리 반올림 퍼센트 `"62.5%"`
+
+
+### 2. domain
+- Lotto 클래스 : 생성자에서 번호 검증
+- Ranks, Prizes 상수 : 등수 규칙 및 상금 테이블
+
+
+### 3. service
+- LottoService
+    - [ ] issueTickets : 금액 -> 정수 계산, Random Api 통한 티켓 발행
+    - [ ] evaluate : 로또 번호 일치 개수 계산, 등수 판정, 집계 및 수익률 반환
+- matchCounter : 교집합 개수 판정
+- rankResolver : 보너스 포함 판정
+
+
+### 4. io
+- [ ] InputView
+- [ ] OutputView
+- [ ] 공통 에러 처리
+
+
+### 5. App.js
+- [ ] 모든 모듈 연동
+- [ ] `App.run()` 실행 흐름 완성
+
+
+### 6. test
+- [ ] LottoTest.js : 테스트 코드 추가 및 테스트
+- [ ] ApplicationTest.js : 테스트 코드 실행
\ No newline at end of file

From 5397573ecd251cd730b0db265c54182a8e07d0ca Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 16:32:11 +0900
Subject: [PATCH 02/20] =?UTF-8?q?feat:=20parse=20=ED=95=A8=EC=88=98=20?=
 =?UTF-8?q?=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 src/util/parser.js | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/util/parser.js

diff --git a/src/util/parser.js b/src/util/parser.js
new file mode 100644
index 000000000..8e1898397
--- /dev/null
+++ b/src/util/parser.js
@@ -0,0 +1,23 @@
+export function parseAmount(amountStr) {
+    const amount = String(amountStr ?? "").trim();
+    if (!/^\d+$/.test(amount)) {
+        throw new Error("[Error] 구입 금액은 숫자여야 합니다.");
+    }
+    return Number(amount);
+}
+
+export function parseWinningNumbers(numbersStr) {
+    const numbers = String(numbersStr ?? "").trim().split(",").map(num => num.trim());
+    if (numbers.length !== 6 || !numbers.every(num => /^\d+$/.test(num))) {
+        throw new Error("[Error] 당첨 번호는 쉼표로 구분된 6개의 숫자여야 합니다.");
+    }
+    return numbers.map(Number);
+}
+
+export function parseBonusNumber(bonusStr) {
+    const bonus = String(bonusStr ?? "").trim();
+    if (!/^\d+$/.test(bonus)) {
+        throw new Error("[Error] 보너스 번호는 숫자여야 합니다.");
+    }
+    return Number(bonus);
+}

From e13ad9b9678cf50b5982dbe9877d13e5e65083ec Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 17:27:06 +0900
Subject: [PATCH 03/20] =?UTF-8?q?feat:=20=EB=A1=9C=EB=98=90=20=EC=83=81?=
 =?UTF-8?q?=EC=88=98=20=EC=B6=94=EA=B0=80=20=EB=B0=8F=20=EC=9C=A0=ED=9A=A8?=
 =?UTF-8?q?=EC=84=B1=20=EA=B2=80=EC=82=AC=20=EB=A1=9C=EC=A7=81=20=EC=B6=94?=
 =?UTF-8?q?=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/constants.js      |  4 ++++
 src/util/validator.js | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 src/constants.js
 create mode 100644 src/util/validator.js

diff --git a/src/constants.js b/src/constants.js
new file mode 100644
index 000000000..23440546b
--- /dev/null
+++ b/src/constants.js
@@ -0,0 +1,4 @@
+export const LOTTO_MIN = 1;
+export const LOTTO_MAX = 45;
+export const LOTTO_SIZE = 6;
+export const LOTTO_PRICE = 1000;
\ No newline at end of file
diff --git a/src/util/validator.js b/src/util/validator.js
new file mode 100644
index 000000000..6e6663362
--- /dev/null
+++ b/src/util/validator.js
@@ -0,0 +1,39 @@
+import { LOTTO_MIN, LOTTO_MAX, LOTTO_SIZE, LOTTO_PRICE } from "../constants.js";
+
+const inRange = (number) => Number.isInteger(number) && LOTTO_MIN <= number && number <= LOTTO_MAX;
+
+export const validateAmount = (amount) => {
+    if (!Number.isInteger(amount)) {
+        throw new Error("[Error] 구입 금액은 숫자여야 합니다.");
+    }
+    if (amount < LOTTO_PRICE || amount % LOTTO_PRICE !== 0) {
+        throw new Error("[Error] 구입 금액은 1000원 단위여야 합니다.");
+    }
+    return amount;
+}
+
+export const validateWinningNumbers = (numbers) => {
+    if (!Array.isArray(numbers) || numbers.length !== LOTTO_SIZE) {
+        throw new Error("[Error] 로또 번호는 6개의 숫자여야 합니다.");
+    }
+    if (!numbers.some(number => !inRange(number))) {
+        throw new Error(`[Error] 로또 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
+    }
+    const uniqueNumbers = new Set(numbers);
+    if (uniqueNumbers.size !== numbers.length) {
+        throw new Error("[Error] 로또 번호는 중복될 수 없습니다.");
+    }
+    return numbers;
+}
+
+
+export const validateBonusNumber = (bonusNumber, winningNumbers) => {
+    if (!inRange(bonusNumber)) {
+        throw new Error(`[Error] 보너스 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
+    }
+    const winningNumbers = new Set(winningNumbers);
+    if (winningNumbers.includes(bonusNumber)) {
+        throw new Error("[Error] 보너스 번호는 당첨 번호와 중복될 수 없습니다.");
+    }
+    return bonusNumber;
+}
\ No newline at end of file

From 9621a22fdb7babeec24f651c8ef95928168d7f7c Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 17:27:35 +0900
Subject: [PATCH 04/20] =?UTF-8?q?docs:=20=EA=B5=AC=ED=98=84=ED=95=A0=20?=
 =?UTF-8?q?=EA=B8=B0=EB=8A=A5=20=EC=88=98=EC=A0=95=20=EB=B0=8F=20=EC=99=84?=
 =?UTF-8?q?=EB=A3=8C=20=EC=9E=91=EC=97=85=20=EC=B2=B4=ED=81=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index fe4dbdb85..1a4cf08c6 100644
--- a/README.md
+++ b/README.md
@@ -23,15 +23,14 @@
 ## 🔧 구현할 기능 목록
 ### 1. util
 - parser(문자열 -> 자료형 변환)
-    - [ ] parseAmount : 구입 금액 문자열 -> 정수
-    - [ ] parseWinningNumbers : 로또 담청 번호 문자열 -> 정수 배열
-    - [ ] parseBonusNumber : 보너스 번호 문자열 -> 정수
+    - [X] parseAmount : 구입 금액 문자열 -> 정수
+    - [X] parseWinningNumbers : 로또 담청 번호 문자열 -> 정수 배열
+    - [X] parseBonusNumber : 보너스 번호 문자열 -> 정수
 
 - validator(입력 규칙 검증)
-    - [ ] validateAmount : 정수 여부, 1000원 단위, 최소 1000원
-    - [ ] validateTicketNumbers : 길이 6, 1~45, 중복 없음
-    - [ ] validateWinningNumbers : 길이 6, 1~45, 중복 없음
-    - [ ] validateBonusNumber : 1~45, 당첨 번호와 중복 불가
+    - [X] validateAmount : 정수 여부, 1000원 단위, 최소 1000원
+    - [X] validateWinningNumbers : 길이 6, 1~45, 중복 없음
+    - [X] validateBonusNumber : 1~45, 당첨 번호와 중복 불가
 
 - format(출력 포맷)
     - [ ] formatTicket : `[1, 2, 5, 14, 22, 45]` 문자열화

From d03328f688659cef989736a12beb6740b7a2315b Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 17:33:19 +0900
Subject: [PATCH 05/20] =?UTF-8?q?feat:=20=EC=B6=9C=EB=A0=A5=20=ED=98=95?=
 =?UTF-8?q?=EC=8B=9D=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/util/format.js | 6 ++++++
 1 file changed, 6 insertions(+)
 create mode 100644 src/util/format.js

diff --git a/src/util/format.js b/src/util/format.js
new file mode 100644
index 000000000..c08d712c4
--- /dev/null
+++ b/src/util/format.js
@@ -0,0 +1,6 @@
+export const formatTicket = (numbers) => `[${numbers.join(", ")}]`;
+
+export const formatRate = (value) => {
+  const rounded = Math.round(value * 10) / 10;
+  return `${rounded}%`;
+};

From 32a08f395c6c6e997856b3a1f5bef23b0aba9f7f Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 18:53:34 +0900
Subject: [PATCH 06/20] =?UTF-8?q?feat:=20=EB=A1=9C=EB=98=90=20=ED=81=B4?=
 =?UTF-8?q?=EB=9E=98=EC=8A=A4=20=EA=B2=BD=EB=A1=9C=20=EC=9D=B4=EB=8F=99=20?=
 =?UTF-8?q?=EB=B0=8F=20=EC=B6=94=EA=B0=80=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

---
 README.md           |  8 ++++----
 src/Lotto.js        | 18 ------------------
 src/domain/Lotto.js | 30 ++++++++++++++++++++++++++++++
 3 files changed, 34 insertions(+), 22 deletions(-)
 delete mode 100644 src/Lotto.js
 create mode 100644 src/domain/Lotto.js

diff --git a/README.md b/README.md
index 1a4cf08c6..9c81ce36a 100644
--- a/README.md
+++ b/README.md
@@ -33,13 +33,13 @@
     - [X] validateBonusNumber : 1~45, 당첨 번호와 중복 불가
 
 - format(출력 포맷)
-    - [ ] formatTicket : `[1, 2, 5, 14, 22, 45]` 문자열화
-    - [ ] formatRate : 소수점 둘째 자리 반올림 퍼센트 `"62.5%"`
+    - [X] formatTicket : `[1, 2, 5, 14, 22, 45]` 문자열화
+    - [X] formatRate : 소수점 둘째 자리 반올림 퍼센트 `"62.5%"`
 
 
 ### 2. domain
-- Lotto 클래스 : 생성자에서 번호 검증
-- Ranks, Prizes 상수 : 등수 규칙 및 상금 테이블
+- [X] Lotto 클래스 : 생성자에서 번호 검증
+- [ ] Ranks, Prizes 상수 : 등수 규칙 및 상금 테이블
 
 
 ### 3. service
diff --git a/src/Lotto.js b/src/Lotto.js
deleted file mode 100644
index cb0b1527e..000000000
--- a/src/Lotto.js
+++ /dev/null
@@ -1,18 +0,0 @@
-class Lotto {
-  #numbers;
-
-  constructor(numbers) {
-    this.#validate(numbers);
-    this.#numbers = numbers;
-  }
-
-  #validate(numbers) {
-    if (numbers.length !== 6) {
-      throw new Error("[ERROR] 로또 번호는 6개여야 합니다.");
-    }
-  }
-
-  // TODO: 추가 기능 구현
-}
-
-export default Lotto;
diff --git a/src/domain/Lotto.js b/src/domain/Lotto.js
new file mode 100644
index 000000000..d0c9eae61
--- /dev/null
+++ b/src/domain/Lotto.js
@@ -0,0 +1,30 @@
+import { LOTTO_MIN, LOTTO_MAX, LOTTO_SIZE } from "../constants.js";
+
+class Lotto {
+  #numbers;
+
+  constructor(numbers) {
+    this.#validate(numbers);
+    this.#numbers = [...numbers].sort((a, b) => a - b);
+  }
+
+  #validate(numbers) {
+    if (!Array.isArray(numbers) || numbers.length !== LOTTO_SIZE) {
+      throw new Error("[ERROR] 로또 번호는 6개여야 합니다.");
+    }
+    const isRange = (number) => Number.isInteger(number) && LOTTO_MIN <= number && number <= LOTTO_MAX;
+    if (numbers.some(number => !isRange(number))) {
+      throw new Error(`[ERROR] 로또 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
+    }
+    const set = new Set(numbers);
+    if (set.size !== numbers.length) {
+      throw new Error("[ERROR] 로또 번호는 중복될 수 없습니다.");
+    }
+  }
+
+  getNumbers() {
+    return [...this.#numbers];
+  }
+}
+
+export default Lotto;

From 394c3b1ed3af0118767645870d0bb9a89f035abd Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 19:03:39 +0900
Subject: [PATCH 07/20] =?UTF-8?q?feat:=20Rank,=20Prize=20=EC=83=81?=
 =?UTF-8?q?=EC=88=98=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/constants.js | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/constants.js b/src/constants.js
index 23440546b..10bbe877d 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -1,4 +1,22 @@
 export const LOTTO_MIN = 1;
 export const LOTTO_MAX = 45;
 export const LOTTO_SIZE = 6;
-export const LOTTO_PRICE = 1000;
\ No newline at end of file
+export const LOTTO_PRICE = 1000;
+
+// 등수/상금 테이블
+export const PRIZE = {
+    FIRST: 2000000000, // 6개
+    SECOND: 30000000, // 5개 + 보너스
+    THIRD: 1500000, // 5개
+    FOURTH: 50000, // 4개
+    FIFTH: 5000, // 3개
+};
+
+// 출력 라벨
+export const RANK_LABEL = {
+  FIFTH:  "3개 일치 (5,000원)",
+  FOURTH: "4개 일치 (50,000원)",
+  THIRD:  "5개 일치 (1,500,000원)",
+  SECOND: "5개 일치, 보너스 볼 일치 (30,000,000원)",
+  FIRST:  "6개 일치 (2,000,000,000원)",
+};
\ No newline at end of file

From 3e2c92f11c5b4037bb3355a432ce9b725ea8e3cc Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 19:15:22 +0900
Subject: [PATCH 08/20] =?UTF-8?q?feat:=20=EB=A1=9C=EB=98=90=20=EB=9E=9C?=
 =?UTF-8?q?=EB=8D=A4=20=EB=B0=9C=ED=96=89=20=EA=B8=B0=EB=8A=A5=20=EC=B6=94?=
 =?UTF-8?q?=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                   |  4 ++--
 src/service/lottoService.js | 13 +++++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)
 create mode 100644 src/service/lottoService.js

diff --git a/README.md b/README.md
index 9c81ce36a..afbeb56e9 100644
--- a/README.md
+++ b/README.md
@@ -39,12 +39,12 @@
 
 ### 2. domain
 - [X] Lotto 클래스 : 생성자에서 번호 검증
-- [ ] Ranks, Prizes 상수 : 등수 규칙 및 상금 테이블
+- [X] Ranks, Prizes 상수 : 등수 규칙 및 상금 테이블
 
 
 ### 3. service
 - LottoService
-    - [ ] issueTickets : 금액 -> 정수 계산, Random Api 통한 티켓 발행
+    - [X] issueTickets : 금액 -> 정수 계산, Random Api 통한 티켓 발행
     - [ ] evaluate : 로또 번호 일치 개수 계산, 등수 판정, 집계 및 수익률 반환
 - matchCounter : 교집합 개수 판정
 - rankResolver : 보너스 포함 판정
diff --git a/src/service/lottoService.js b/src/service/lottoService.js
new file mode 100644
index 000000000..ab5e77fae
--- /dev/null
+++ b/src/service/lottoService.js
@@ -0,0 +1,13 @@
+import {MissionUtils} from '@woowacourse/mission-utils';
+import { LOTTO_MIN, LOTTO_MAX, LOTTO_SIZE, LOTTO_PRICE, PRIZE } from "../constants.js";
+import Lotto from "../domain/Lotto.js";
+
+const sortAscending = (arr) => [...arr].sort((a, b) => a - b);
+
+export const issueTickets = (amount) => {
+    const count = amount / LOTTO_PRICE;
+    return Array.from({ length: count }, () => {
+        const numbers = MissionUtils.Random.pickUniqueNumbersInRange(LOTTO_MIN, LOTTO_MAX, LOTTO_SIZE);
+        return new Lotto(sortAscending(numbers));
+    });
+};
\ No newline at end of file

From cde0545cde2b1ebc0c85a08ac3ce1481b4d513d7 Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 19:46:52 +0900
Subject: [PATCH 09/20] =?UTF-8?q?fix:=20=EB=A1=9C=EB=98=90=20=EB=B0=9C?=
 =?UTF-8?q?=ED=96=89=20=EA=B8=B0=EB=8A=A5=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/service/lottoService.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/service/lottoService.js b/src/service/lottoService.js
index ab5e77fae..8ec56bda8 100644
--- a/src/service/lottoService.js
+++ b/src/service/lottoService.js
@@ -6,8 +6,10 @@ const sortAscending = (arr) => [...arr].sort((a, b) => a - b);
 
 export const issueTickets = (amount) => {
     const count = amount / LOTTO_PRICE;
-    return Array.from({ length: count }, () => {
+    const tickets = [];
+    for (let i = 0; i < count; i += 1) {
         const numbers = MissionUtils.Random.pickUniqueNumbersInRange(LOTTO_MIN, LOTTO_MAX, LOTTO_SIZE);
-        return new Lotto(sortAscending(numbers));
-    });
+        tickets.push(new Lotto(sortAscending(numbers)));
+    }
+    return tickets;
 };
\ No newline at end of file

From f0e2132f3ce0c6c7dcc58e64ffa7b0891325c228 Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 19:50:41 +0900
Subject: [PATCH 10/20] =?UTF-8?q?feat:=20=EA=B5=90=EC=A7=91=ED=95=A9=20?=
 =?UTF-8?q?=EC=B0=BE=EA=B8=B0=20=EA=B8=B0=EB=8A=A5=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                   |  4 ++--
 src/service/lottoService.js | 11 +++++++++++
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index afbeb56e9..7166c6736 100644
--- a/README.md
+++ b/README.md
@@ -45,9 +45,9 @@
 ### 3. service
 - LottoService
     - [X] issueTickets : 금액 -> 정수 계산, Random Api 통한 티켓 발행
+    - [X] matchCounter : 교집합 개수 판정
+    - [ ] rankResolver : 보너스 포함 판정
     - [ ] evaluate : 로또 번호 일치 개수 계산, 등수 판정, 집계 및 수익률 반환
-- matchCounter : 교집합 개수 판정
-- rankResolver : 보너스 포함 판정
 
 
 ### 4. io
diff --git a/src/service/lottoService.js b/src/service/lottoService.js
index 8ec56bda8..59f26f139 100644
--- a/src/service/lottoService.js
+++ b/src/service/lottoService.js
@@ -12,4 +12,15 @@ export const issueTickets = (amount) => {
         tickets.push(new Lotto(sortAscending(numbers)));
     }
     return tickets;
+};
+
+export const matchCounter = (ticket, winningNumbers) => {
+    const winSet = new Set(winningNumbers);
+    let count = 0;
+    for (const n of ticket) {
+        if (winSet.has(n)) {
+            count += 1;
+        }
+    }
+    return count;
 };
\ No newline at end of file

From 3f9b59748881a0f1b218621b2d50e9e44ad8016f Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 19:53:31 +0900
Subject: [PATCH 11/20] =?UTF-8?q?feat:=20=EB=B3=B4=EB=84=88=EC=8A=A4=20?=
 =?UTF-8?q?=ED=8C=90=EC=A0=95=20=EA=B8=B0=EB=8A=A5=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                   |  2 +-
 src/service/lottoService.js | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 7166c6736..e2e02b370 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@
 - LottoService
     - [X] issueTickets : 금액 -> 정수 계산, Random Api 통한 티켓 발행
     - [X] matchCounter : 교집합 개수 판정
-    - [ ] rankResolver : 보너스 포함 판정
+    - [X] rankResolver : 보너스 포함 판정
     - [ ] evaluate : 로또 번호 일치 개수 계산, 등수 판정, 집계 및 수익률 반환
 
 
diff --git a/src/service/lottoService.js b/src/service/lottoService.js
index 59f26f139..309507a54 100644
--- a/src/service/lottoService.js
+++ b/src/service/lottoService.js
@@ -23,4 +23,14 @@ export const matchCounter = (ticket, winningNumbers) => {
         }
     }
     return count;
+};
+
+export const rankResolver = (ticketNumbers, winningNumbers, bonusNumber) => {
+    const matchCount = matchCounter(ticketNumbers, winningNumbers);
+    if (matchCount === 6) return 'FIRST';
+    if (matchCount === 5 && ticketNumbers.includes(bonusNumber)) return 'SECOND';
+    if (matchCount === 5) return 'THIRD';
+    if (matchCount === 4) return 'FOURTH';
+    if (matchCount === 3) return 'FIFTH';
+    return 'NONE';
 };
\ No newline at end of file

From ac1c6bcd8f2ec25381a06a49d7f231bf7bf62a3b Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 19:58:55 +0900
Subject: [PATCH 12/20] =?UTF-8?q?feat:=20=EB=A1=9C=EB=98=90=20=EB=B2=88?=
 =?UTF-8?q?=ED=98=B8=20=EC=9D=BC=EC=B9=98=20=EA=B0=9C=EC=88=98=20=EA=B3=84?=
 =?UTF-8?q?=EC=82=B0=20=EB=B0=8F=20=EB=93=B1=EC=88=98=20=ED=8C=90=EC=A0=95?=
 =?UTF-8?q?,=20=EC=A7=91=EA=B3=84=20=EB=B0=8F=20=EC=88=98=EC=9D=B5?=
 =?UTF-8?q?=EB=A5=A0=20=EB=B0=98=ED=99=98=20=EA=B8=B0=EB=8A=A5=20=EC=B6=94?=
 =?UTF-8?q?=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                   |  2 +-
 src/service/lottoService.js | 23 ++++++++++++++++++++++-
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index e2e02b370..156d819dc 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@
     - [X] issueTickets : 금액 -> 정수 계산, Random Api 통한 티켓 발행
     - [X] matchCounter : 교집합 개수 판정
     - [X] rankResolver : 보너스 포함 판정
-    - [ ] evaluate : 로또 번호 일치 개수 계산, 등수 판정, 집계 및 수익률 반환
+    - [X] evaluate : 로또 번호 일치 개수 계산, 등수 판정, 집계 및 수익률 반환
 
 
 ### 4. io
diff --git a/src/service/lottoService.js b/src/service/lottoService.js
index 309507a54..4cb764060 100644
--- a/src/service/lottoService.js
+++ b/src/service/lottoService.js
@@ -33,4 +33,25 @@ export const rankResolver = (ticketNumbers, winningNumbers, bonusNumber) => {
     if (matchCount === 4) return 'FOURTH';
     if (matchCount === 3) return 'FIFTH';
     return 'NONE';
-};
\ No newline at end of file
+};
+
+const computeTotalPrize = (rankCounts) => {
+    let total = 0;
+    total += rankCounts.FIRST * PRIZE.FIRST;
+    total += rankCounts.SECOND * PRIZE.SECOND;
+    total += rankCounts.THIRD * PRIZE.THIRD;
+    total += rankCounts.FOURTH * PRIZE.FOURTH;
+    total += rankCounts.FIFTH * PRIZE.FIFTH;
+    return total;
+};
+
+export const evaluate = (tickets, winningNumbers, bonusNumber) => {
+    const rankCounts = { FIRST: 0, SECOND: 0, THIRD: 0, FOURTH: 0, FIFTH: 0};
+    for (const ticket of tickets) {
+        const rank = rankResolver(ticket.getNumbers(), winningNumbers, bonusNumber);
+        if (counts[rank] !== undefined) counts[rank] += 1;
+    }
+    return { counts: rankCounts, totalPrize: computeTotalPrize(rankCounts) };
+};
+
+export default { issueTickets, matchCounter, rankResolver, evaluate };
\ No newline at end of file

From a13438de5bfc7e139b436a5cd4fab94c90768916 Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 20:10:21 +0900
Subject: [PATCH 13/20] =?UTF-8?q?feat:=20=EA=B3=B5=ED=86=B5=20=EC=97=90?=
 =?UTF-8?q?=EB=9F=AC=20=EC=B2=98=EB=A6=AC=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md       |  2 +-
 src/io/error.js | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 src/io/error.js

diff --git a/README.md b/README.md
index 156d819dc..99f8cc40a 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,7 @@
 ### 4. io
 - [ ] InputView
 - [ ] OutputView
-- [ ] 공통 에러 처리
+- [X] 공통 에러 처리
 
 
 ### 5. App.js
diff --git a/src/io/error.js b/src/io/error.js
new file mode 100644
index 000000000..ec7b63f8c
--- /dev/null
+++ b/src/io/error.js
@@ -0,0 +1,20 @@
+import { MissionUtils } from '@woowacourse/mission-utils';
+
+export const printError = (error) => {
+    let raw = error;
+    if (raw === null || raw === undefined) {
+        raw = "";
+    }
+
+    let msg;
+    if (raw && typeof raw.message === 'string') {
+        msg = raw.message;
+    } else {
+        msg = String(raw);
+    }
+
+    if (!msg.startsWith("[ERROR]")) {
+        msg = `[ERROR] ${msg}`;
+    }
+    MissionUtils.Console.print(msg);
+};
\ No newline at end of file

From 1d6215ace98b695750d11d8985e0271d603ec71d Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 20:18:41 +0900
Subject: [PATCH 14/20] =?UTF-8?q?feat:=20InputView=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md           |  2 +-
 src/io/inputView.js | 39 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+), 1 deletion(-)
 create mode 100644 src/io/inputView.js

diff --git a/README.md b/README.md
index 99f8cc40a..4990966ff 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@
 
 
 ### 4. io
-- [ ] InputView
+- [X] InputView
 - [ ] OutputView
 - [X] 공통 에러 처리
 
diff --git a/src/io/inputView.js b/src/io/inputView.js
new file mode 100644
index 000000000..a20393585
--- /dev/null
+++ b/src/io/inputView.js
@@ -0,0 +1,39 @@
+import { MissionUtils } from '@woowacourse/mission-utils';
+import { parseAmount, parseWinningNumbers, parseBonusNumber } from "../util/parser.js";
+import { validateAmoun, validateWinningNumbers, validateBonusNumber } from '../util/validator.js';
+import { printError } from './error.js';
+
+const ask = (question) => MissionUtils.Console.readLineAsync(question);
+
+export const askPurchaseAmount = async () => {
+    while (true) {
+        try {
+            const amountStr = await ask("구입금액을 입력해 주세요.\n");
+            return validateAmount(parseAmount(amountStr));
+        } catch (error) {
+            printError(error);
+        }
+    }
+};
+
+export const askWinningNumbers = async () => {
+    while (true) {
+        try {
+            const numbersStr = await ask("\n당첨 번호를 입력해 주세요.\n");
+            return validateWinningNumbers(parseWinningNumbers(numbersStr));
+        } catch (error) {
+            printError(error);
+        }
+    }
+};
+
+export const askBonusNumber = async (winningNumbers) => {
+    while (true) {
+        try {
+            const bonusStr = await ask("\n보너스 번호를 입력해 주세요.\n");
+            return validateBonusNumber(parseBonusNumber(bonusStr), winningNumbers);
+        } catch (error) {
+            printError(error);
+        }
+    }
+};
\ No newline at end of file

From d0c72cfabbfbde6e9c7bff483fcc4783024bd511 Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 20:28:58 +0900
Subject: [PATCH 15/20] =?UTF-8?q?feat:=20outView=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md         |  2 +-
 src/io/outView.js | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 src/io/outView.js

diff --git a/README.md b/README.md
index 4990966ff..f039c9c94 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@
 
 ### 4. io
 - [X] InputView
-- [ ] OutputView
+- [X] OutputView
 - [X] 공통 에러 처리
 
 
diff --git a/src/io/outView.js b/src/io/outView.js
new file mode 100644
index 000000000..742e10254
--- /dev/null
+++ b/src/io/outView.js
@@ -0,0 +1,21 @@
+import { MissionUtils } from '@woowacourse/mission-utils';
+import { formatTicket, formatRate } from '../util/format.js';
+import { RANK_LABEL } from '../constants.js';
+
+export const printIssuedTickets = (tickets) => {
+    MissionUtils.Console.print(`\n${tickets.length}개를 구매했습니다.`);
+    for (const ticket of tickets) {
+        MissionUtils.Console.print(formatTicket(ticket.getNumbers()));
+    }
+};
+
+export const printEvaluationResults = (rankCounts, totalPrize, purchaseAmount) => {
+    MissionUtils.Console.print('\n당첨 통계\n---');
+    MissionUtils.Console.print(`${RANK_LABEL.FIRST} (${RANK_LABEL.FIRST}원) - ${rankCounts.FIRST}개`);
+    MissionUtils.Console.print(`${RANK_LABEL.SECOND} (${RANK_LABEL.SECOND}원) - ${rankCounts.SECOND}개`);
+    MissionUtils.Console.print(`${RANK_LABEL.THIRD} (${RANK_LABEL.THIRD}원) - ${rankCounts.THIRD}개`);
+    MissionUtils.Console.print(`${RANK_LABEL.FOURTH} (${RANK_LABEL.FOURTH}원) - ${rankCounts.FOURTH}개`);
+    MissionUtils.Console.print(`${RANK_LABEL.FIFTH} (${RANK_LABEL.FIFTH}원) - ${rankCounts.FIFTH}개`);
+    const rate = (totalPrize / purchaseAmount) * 100;
+    MissionUtils.Console.print(`총 수익률은 ${formatRate(rate)}입니다.`);
+};
\ No newline at end of file

From 5ff174728f4fc8be2f1f94fb6d6eb0cc609bceee Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 23:06:03 +0900
Subject: [PATCH 16/20] =?UTF-8?q?feat:=20App.js=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/App.js | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/App.js b/src/App.js
index 091aa0a5d..ae1376dd5 100644
--- a/src/App.js
+++ b/src/App.js
@@ -1,5 +1,20 @@
+import { askPurchaseAmount, askWinningNumbers, askBonusNumber} from "./io/inputView.js";
+import { printIssuedTickets, printEvaluationResults } from "./io/outView.js";
+import { issueTickets, evaluate } from "./service/lottoService.js";
+
+
 class App {
-  async run() {}
+  async run() {
+    const amount = await askPurchaseAmount();
+    const tickets = issueTickets(amount);
+    printIssuedTickets(tickets);
+
+    const winningNumbers = await askWinningNumbers();
+    const bonusNumber = await askBonusNumber(winningNumbers);
+
+    const { counts, totalPrize } = evaluate(tickets, winningNumbers, bonusNumber);
+    printEvaluationResults(counts, totalPrize, amount);
+  }
 }
 
 export default App;

From 893c8da31c0dbffc642135aa1ad4f9aa0620b247 Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 23:18:54 +0900
Subject: [PATCH 17/20] =?UTF-8?q?fix:=20=EB=B9=8C=EB=93=9C=20=EC=98=A4?=
 =?UTF-8?q?=EB=A5=98=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/io/inputView.js         |  2 +-
 src/io/outView.js           | 21 +++++++++++++--------
 src/service/lottoService.js |  5 +++--
 src/util/parser.js          | 10 ++++++----
 src/util/validator.js       |  9 ++++-----
 5 files changed, 27 insertions(+), 20 deletions(-)

diff --git a/src/io/inputView.js b/src/io/inputView.js
index a20393585..3285e36d8 100644
--- a/src/io/inputView.js
+++ b/src/io/inputView.js
@@ -1,6 +1,6 @@
 import { MissionUtils } from '@woowacourse/mission-utils';
 import { parseAmount, parseWinningNumbers, parseBonusNumber } from "../util/parser.js";
-import { validateAmoun, validateWinningNumbers, validateBonusNumber } from '../util/validator.js';
+import { validateAmount, validateWinningNumbers, validateBonusNumber } from '../util/validator.js';
 import { printError } from './error.js';
 
 const ask = (question) => MissionUtils.Console.readLineAsync(question);
diff --git a/src/io/outView.js b/src/io/outView.js
index 742e10254..e9a86ef98 100644
--- a/src/io/outView.js
+++ b/src/io/outView.js
@@ -2,6 +2,8 @@ import { MissionUtils } from '@woowacourse/mission-utils';
 import { formatTicket, formatRate } from '../util/format.js';
 import { RANK_LABEL } from '../constants.js';
 
+const RANK_ORDER = ['FIFTH', 'FOURTH', 'THIRD', 'SECOND', 'FIRST'];
+
 export const printIssuedTickets = (tickets) => {
     MissionUtils.Console.print(`\n${tickets.length}개를 구매했습니다.`);
     for (const ticket of tickets) {
@@ -10,12 +12,15 @@ export const printIssuedTickets = (tickets) => {
 };
 
 export const printEvaluationResults = (rankCounts, totalPrize, purchaseAmount) => {
-    MissionUtils.Console.print('\n당첨 통계\n---');
-    MissionUtils.Console.print(`${RANK_LABEL.FIRST} (${RANK_LABEL.FIRST}원) - ${rankCounts.FIRST}개`);
-    MissionUtils.Console.print(`${RANK_LABEL.SECOND} (${RANK_LABEL.SECOND}원) - ${rankCounts.SECOND}개`);
-    MissionUtils.Console.print(`${RANK_LABEL.THIRD} (${RANK_LABEL.THIRD}원) - ${rankCounts.THIRD}개`);
-    MissionUtils.Console.print(`${RANK_LABEL.FOURTH} (${RANK_LABEL.FOURTH}원) - ${rankCounts.FOURTH}개`);
-    MissionUtils.Console.print(`${RANK_LABEL.FIFTH} (${RANK_LABEL.FIFTH}원) - ${rankCounts.FIFTH}개`);
-    const rate = (totalPrize / purchaseAmount) * 100;
-    MissionUtils.Console.print(`총 수익률은 ${formatRate(rate)}입니다.`);
+    MissionUtils.Console.print('\n당첨 통계');
+    MissionUtils.Console.print('---');
+    for (const r of RANK_ORDER) {
+    let c = 0;
+    if (rankCounts && rankCounts[r] !== undefined) {
+      c = rankCounts[r];
+    }
+    MissionUtils.Console.print(`${RANK_LABEL[r]} - ${c}개`);
+  }
+  const rate = (totalPrize / purchaseAmount) * 100;
+  MissionUtils.Console.print(`총 수익률은 ${formatRate(rate)}입니다.`);
 };
\ No newline at end of file
diff --git a/src/service/lottoService.js b/src/service/lottoService.js
index 4cb764060..9c6477e5a 100644
--- a/src/service/lottoService.js
+++ b/src/service/lottoService.js
@@ -49,9 +49,10 @@ export const evaluate = (tickets, winningNumbers, bonusNumber) => {
     const rankCounts = { FIRST: 0, SECOND: 0, THIRD: 0, FOURTH: 0, FIFTH: 0};
     for (const ticket of tickets) {
         const rank = rankResolver(ticket.getNumbers(), winningNumbers, bonusNumber);
-        if (counts[rank] !== undefined) counts[rank] += 1;
+        if (rankCounts[rank] !== undefined) rankCounts[rank] += 1;
     }
-    return { counts: rankCounts, totalPrize: computeTotalPrize(rankCounts) };
+    const totalPrize = computeTotalPrize(rankCounts);
+    return { rankCounts, totalPrize };
 };
 
 export default { issueTickets, matchCounter, rankResolver, evaluate };
\ No newline at end of file
diff --git a/src/util/parser.js b/src/util/parser.js
index 8e1898397..ea3b6fba6 100644
--- a/src/util/parser.js
+++ b/src/util/parser.js
@@ -1,15 +1,17 @@
+import { LOTTO_SIZE } from "../constants.js";
+
 export function parseAmount(amountStr) {
     const amount = String(amountStr ?? "").trim();
     if (!/^\d+$/.test(amount)) {
-        throw new Error("[Error] 구입 금액은 숫자여야 합니다.");
+        throw new Error("[ERROR] 구입 금액은 숫자여야 합니다.");
     }
     return Number(amount);
 }
 
 export function parseWinningNumbers(numbersStr) {
     const numbers = String(numbersStr ?? "").trim().split(",").map(num => num.trim());
-    if (numbers.length !== 6 || !numbers.every(num => /^\d+$/.test(num))) {
-        throw new Error("[Error] 당첨 번호는 쉼표로 구분된 6개의 숫자여야 합니다.");
+    if (numbers.length !== LOTTO_SIZE || numbers.every(num => !/^\d+$/.test(num))) {
+        throw new Error(`[ERROR] 당첨 번호는 쉼표로 구분된 ${LOTTO_MAX}개의 숫자여야 합니다.`);
     }
     return numbers.map(Number);
 }
@@ -17,7 +19,7 @@ export function parseWinningNumbers(numbersStr) {
 export function parseBonusNumber(bonusStr) {
     const bonus = String(bonusStr ?? "").trim();
     if (!/^\d+$/.test(bonus)) {
-        throw new Error("[Error] 보너스 번호는 숫자여야 합니다.");
+        throw new Error("[ERROR] 보너스 번호는 숫자여야 합니다.");
     }
     return Number(bonus);
 }
diff --git a/src/util/validator.js b/src/util/validator.js
index 6e6663362..13c892d58 100644
--- a/src/util/validator.js
+++ b/src/util/validator.js
@@ -14,9 +14,9 @@ export const validateAmount = (amount) => {
 
 export const validateWinningNumbers = (numbers) => {
     if (!Array.isArray(numbers) || numbers.length !== LOTTO_SIZE) {
-        throw new Error("[Error] 로또 번호는 6개의 숫자여야 합니다.");
+        throw new Error(`[Error] 로또 번호는 ${LOTTO_MIN}개의 숫자여야 합니다.`);
     }
-    if (!numbers.some(number => !inRange(number))) {
+    if (numbers.some(number => !inRange(number))) {
         throw new Error(`[Error] 로또 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
     }
     const uniqueNumbers = new Set(numbers);
@@ -26,13 +26,12 @@ export const validateWinningNumbers = (numbers) => {
     return numbers;
 }
 
-
 export const validateBonusNumber = (bonusNumber, winningNumbers) => {
     if (!inRange(bonusNumber)) {
         throw new Error(`[Error] 보너스 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
     }
-    const winningNumbers = new Set(winningNumbers);
-    if (winningNumbers.includes(bonusNumber)) {
+    const winSet = new Set(winningNumbers);
+    if (winSet.has(bonusNumber)) {
         throw new Error("[Error] 보너스 번호는 당첨 번호와 중복될 수 없습니다.");
     }
     return bonusNumber;

From 2d7fda79e984361dc982c2b81abef8ba325ba093 Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 23:32:17 +0900
Subject: [PATCH 18/20] =?UTF-8?q?fix:=20=EC=97=90=EB=9F=AC=20=ED=91=9C?=
 =?UTF-8?q?=EA=B8=B0=20=EC=A4=91=EB=B3=B5=20=EB=AC=B8=EC=A0=9C=20=EC=88=98?=
 =?UTF-8?q?=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 __tests__/LottoTest.js      |  2 +-
 src/domain/Lotto.js         |  6 +++---
 src/service/lottoService.js |  2 +-
 src/util/parser.js          |  6 +++---
 src/util/validator.js       | 14 +++++++-------
 5 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/__tests__/LottoTest.js b/__tests__/LottoTest.js
index 409aaf69b..e207eb128 100644
--- a/__tests__/LottoTest.js
+++ b/__tests__/LottoTest.js
@@ -1,4 +1,4 @@
-import Lotto from "../src/Lotto";
+import Lotto from "../src/domain/Lotto";
 
 describe("로또 클래스 테스트", () => {
   test("로또 번호의 개수가 6개가 넘어가면 예외가 발생한다.", () => {
diff --git a/src/domain/Lotto.js b/src/domain/Lotto.js
index d0c9eae61..19c1f9ce4 100644
--- a/src/domain/Lotto.js
+++ b/src/domain/Lotto.js
@@ -10,15 +10,15 @@ class Lotto {
 
   #validate(numbers) {
     if (!Array.isArray(numbers) || numbers.length !== LOTTO_SIZE) {
-      throw new Error("[ERROR] 로또 번호는 6개여야 합니다.");
+      throw new Error("로또 번호는 6개여야 합니다.");
     }
     const isRange = (number) => Number.isInteger(number) && LOTTO_MIN <= number && number <= LOTTO_MAX;
     if (numbers.some(number => !isRange(number))) {
-      throw new Error(`[ERROR] 로또 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
+      throw new Error(`로또 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
     }
     const set = new Set(numbers);
     if (set.size !== numbers.length) {
-      throw new Error("[ERROR] 로또 번호는 중복될 수 없습니다.");
+      throw new Error("로또 번호는 중복될 수 없습니다.");
     }
   }
 
diff --git a/src/service/lottoService.js b/src/service/lottoService.js
index 9c6477e5a..2f314686e 100644
--- a/src/service/lottoService.js
+++ b/src/service/lottoService.js
@@ -52,7 +52,7 @@ export const evaluate = (tickets, winningNumbers, bonusNumber) => {
         if (rankCounts[rank] !== undefined) rankCounts[rank] += 1;
     }
     const totalPrize = computeTotalPrize(rankCounts);
-    return { rankCounts, totalPrize };
+    return { counts: rankCounts, totalPrize };
 };
 
 export default { issueTickets, matchCounter, rankResolver, evaluate };
\ No newline at end of file
diff --git a/src/util/parser.js b/src/util/parser.js
index ea3b6fba6..980f7cd55 100644
--- a/src/util/parser.js
+++ b/src/util/parser.js
@@ -3,7 +3,7 @@ import { LOTTO_SIZE } from "../constants.js";
 export function parseAmount(amountStr) {
     const amount = String(amountStr ?? "").trim();
     if (!/^\d+$/.test(amount)) {
-        throw new Error("[ERROR] 구입 금액은 숫자여야 합니다.");
+        throw new Error("구입 금액은 숫자여야 합니다.");
     }
     return Number(amount);
 }
@@ -11,7 +11,7 @@ export function parseAmount(amountStr) {
 export function parseWinningNumbers(numbersStr) {
     const numbers = String(numbersStr ?? "").trim().split(",").map(num => num.trim());
     if (numbers.length !== LOTTO_SIZE || numbers.every(num => !/^\d+$/.test(num))) {
-        throw new Error(`[ERROR] 당첨 번호는 쉼표로 구분된 ${LOTTO_MAX}개의 숫자여야 합니다.`);
+        throw new Error(`당첨 번호는 쉼표로 구분된 ${LOTTO_MAX}개의 숫자여야 합니다.`);
     }
     return numbers.map(Number);
 }
@@ -19,7 +19,7 @@ export function parseWinningNumbers(numbersStr) {
 export function parseBonusNumber(bonusStr) {
     const bonus = String(bonusStr ?? "").trim();
     if (!/^\d+$/.test(bonus)) {
-        throw new Error("[ERROR] 보너스 번호는 숫자여야 합니다.");
+        throw new Error("보너스 번호는 숫자여야 합니다.");
     }
     return Number(bonus);
 }
diff --git a/src/util/validator.js b/src/util/validator.js
index 13c892d58..50c2bafca 100644
--- a/src/util/validator.js
+++ b/src/util/validator.js
@@ -4,35 +4,35 @@ const inRange = (number) => Number.isInteger(number) && LOTTO_MIN <= number && n
 
 export const validateAmount = (amount) => {
     if (!Number.isInteger(amount)) {
-        throw new Error("[Error] 구입 금액은 숫자여야 합니다.");
+        throw new Error("구입 금액은 숫자여야 합니다.");
     }
     if (amount < LOTTO_PRICE || amount % LOTTO_PRICE !== 0) {
-        throw new Error("[Error] 구입 금액은 1000원 단위여야 합니다.");
+        throw new Error("구입 금액은 1000원 단위여야 합니다.");
     }
     return amount;
 }
 
 export const validateWinningNumbers = (numbers) => {
     if (!Array.isArray(numbers) || numbers.length !== LOTTO_SIZE) {
-        throw new Error(`[Error] 로또 번호는 ${LOTTO_MIN}개의 숫자여야 합니다.`);
+        throw new Error(`로또 번호는 ${LOTTO_MIN}개의 숫자여야 합니다.`);
     }
     if (numbers.some(number => !inRange(number))) {
-        throw new Error(`[Error] 로또 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
+        throw new Error(`로또 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
     }
     const uniqueNumbers = new Set(numbers);
     if (uniqueNumbers.size !== numbers.length) {
-        throw new Error("[Error] 로또 번호는 중복될 수 없습니다.");
+        throw new Error("로또 번호는 중복될 수 없습니다.");
     }
     return numbers;
 }
 
 export const validateBonusNumber = (bonusNumber, winningNumbers) => {
     if (!inRange(bonusNumber)) {
-        throw new Error(`[Error] 보너스 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
+        throw new Error(`보너스 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
     }
     const winSet = new Set(winningNumbers);
     if (winSet.has(bonusNumber)) {
-        throw new Error("[Error] 보너스 번호는 당첨 번호와 중복될 수 없습니다.");
+        throw new Error("보너스 번호는 당첨 번호와 중복될 수 없습니다.");
     }
     return bonusNumber;
 }
\ No newline at end of file

From 0567c011e8212ca553f7a2f2b40fa6d433a5f755 Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 23:37:05 +0900
Subject: [PATCH 19/20] =?UTF-8?q?fix:=20=EA=B2=BD=EB=A1=9C=20=EC=88=98?=
 =?UTF-8?q?=EC=A0=95=20=EB=B0=8F=20=ED=85=8C=EC=8A=A4=ED=8A=B8=20=EC=98=A4?=
 =?UTF-8?q?=EB=A5=98=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 __tests__/LottoTest.js      |  2 +-
 src/Lotto.js                | 30 ++++++++++++++++++++++++++++++
 src/domain/Lotto.js         |  6 +++---
 src/service/lottoService.js |  2 +-
 src/util/parser.js          |  8 ++++----
 src/util/validator.js       |  2 +-
 6 files changed, 40 insertions(+), 10 deletions(-)
 create mode 100644 src/Lotto.js

diff --git a/__tests__/LottoTest.js b/__tests__/LottoTest.js
index e207eb128..409aaf69b 100644
--- a/__tests__/LottoTest.js
+++ b/__tests__/LottoTest.js
@@ -1,4 +1,4 @@
-import Lotto from "../src/domain/Lotto";
+import Lotto from "../src/Lotto";
 
 describe("로또 클래스 테스트", () => {
   test("로또 번호의 개수가 6개가 넘어가면 예외가 발생한다.", () => {
diff --git a/src/Lotto.js b/src/Lotto.js
new file mode 100644
index 000000000..cf2aa0d7d
--- /dev/null
+++ b/src/Lotto.js
@@ -0,0 +1,30 @@
+import { LOTTO_MIN, LOTTO_MAX, LOTTO_SIZE } from "./constants.js";
+
+class Lotto {
+  #numbers;
+
+  constructor(numbers) {
+    this.#validate(numbers);
+    this.#numbers = [...numbers].sort((a, b) => a - b);
+  }
+
+  #validate(numbers) {
+    if (!Array.isArray(numbers) || numbers.length !== LOTTO_SIZE) {
+      throw new Error("[ERROR] 로또 번호는 6개여야 합니다.");
+    }
+    const isRange = (number) => Number.isInteger(number) && LOTTO_MIN <= number && number <= LOTTO_MAX;
+    if (numbers.some(number => !isRange(number))) {
+      throw new Error(`[ERROR] 로또 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
+    }
+    const set = new Set(numbers);
+    if (set.size !== numbers.length) {
+      throw new Error("[ERROR] 로또 번호는 중복될 수 없습니다.");
+    }
+  }
+
+  getNumbers() {
+    return [...this.#numbers];
+  }
+}
+
+export default Lotto;
diff --git a/src/domain/Lotto.js b/src/domain/Lotto.js
index 19c1f9ce4..d0c9eae61 100644
--- a/src/domain/Lotto.js
+++ b/src/domain/Lotto.js
@@ -10,15 +10,15 @@ class Lotto {
 
   #validate(numbers) {
     if (!Array.isArray(numbers) || numbers.length !== LOTTO_SIZE) {
-      throw new Error("로또 번호는 6개여야 합니다.");
+      throw new Error("[ERROR] 로또 번호는 6개여야 합니다.");
     }
     const isRange = (number) => Number.isInteger(number) && LOTTO_MIN <= number && number <= LOTTO_MAX;
     if (numbers.some(number => !isRange(number))) {
-      throw new Error(`로또 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
+      throw new Error(`[ERROR] 로또 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);
     }
     const set = new Set(numbers);
     if (set.size !== numbers.length) {
-      throw new Error("로또 번호는 중복될 수 없습니다.");
+      throw new Error("[ERROR] 로또 번호는 중복될 수 없습니다.");
     }
   }
 
diff --git a/src/service/lottoService.js b/src/service/lottoService.js
index 2f314686e..f6f04377c 100644
--- a/src/service/lottoService.js
+++ b/src/service/lottoService.js
@@ -1,6 +1,6 @@
 import {MissionUtils} from '@woowacourse/mission-utils';
 import { LOTTO_MIN, LOTTO_MAX, LOTTO_SIZE, LOTTO_PRICE, PRIZE } from "../constants.js";
-import Lotto from "../domain/Lotto.js";
+import Lotto from "../Lotto.js";
 
 const sortAscending = (arr) => [...arr].sort((a, b) => a - b);
 
diff --git a/src/util/parser.js b/src/util/parser.js
index 980f7cd55..b0576e0f9 100644
--- a/src/util/parser.js
+++ b/src/util/parser.js
@@ -9,11 +9,11 @@ export function parseAmount(amountStr) {
 }
 
 export function parseWinningNumbers(numbersStr) {
-    const numbers = String(numbersStr ?? "").trim().split(",").map(num => num.trim());
-    if (numbers.length !== LOTTO_SIZE || numbers.every(num => !/^\d+$/.test(num))) {
-        throw new Error(`당첨 번호는 쉼표로 구분된 ${LOTTO_MAX}개의 숫자여야 합니다.`);
+    const tokens = String(numbersStr ?? "").trim().split(",").map(num => num.trim());
+    if (tokens.length !== LOTTO_SIZE || tokens.some(token => !/^\d+$/.test(token))) {
+        throw new Error(`당첨 번호는 쉼표로 구분된 ${LOTTO_SIZE}개의 숫자여야 합니다.`);
     }
-    return numbers.map(Number);
+    return tokens.map(Number);
 }
 
 export function parseBonusNumber(bonusStr) {
diff --git a/src/util/validator.js b/src/util/validator.js
index 50c2bafca..23faf7359 100644
--- a/src/util/validator.js
+++ b/src/util/validator.js
@@ -14,7 +14,7 @@ export const validateAmount = (amount) => {
 
 export const validateWinningNumbers = (numbers) => {
     if (!Array.isArray(numbers) || numbers.length !== LOTTO_SIZE) {
-        throw new Error(`로또 번호는 ${LOTTO_MIN}개의 숫자여야 합니다.`);
+        throw new Error(`로또 번호는 ${LOTTO_SIZE}개의 숫자여야 합니다.`);
     }
     if (numbers.some(number => !inRange(number))) {
         throw new Error(`로또 번호는 ${LOTTO_MIN}부터 ${LOTTO_MAX} 사이의 숫자여야 합니다.`);

From bcb1be4c20b75e2c6b8108ba040b907f31f77087 Mon Sep 17 00:00:00 2001
From: suhyun113 <163711629+suhyun113@users.noreply.github.com>
Date: Mon, 3 Nov 2025 23:51:15 +0900
Subject: [PATCH 20/20] =?UTF-8?q?feat:=20=ED=85=8C=EC=8A=A4=ED=8A=B8=20?=
 =?UTF-8?q?=EC=BD=94=EB=93=9C=20=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 __tests__/LottoTest.js   | 50 ++++++++++++++++++++++++++++++++++++++--
 __tests__/ServiceTest.js | 38 ++++++++++++++++++++++++++++++
 2 files changed, 86 insertions(+), 2 deletions(-)
 create mode 100644 __tests__/ServiceTest.js

diff --git a/__tests__/LottoTest.js b/__tests__/LottoTest.js
index 409aaf69b..621345ac2 100644
--- a/__tests__/LottoTest.js
+++ b/__tests__/LottoTest.js
@@ -7,12 +7,58 @@ describe("로또 클래스 테스트", () => {
     }).toThrow("[ERROR]");
   });
 
-  // TODO: 테스트가 통과하도록 프로덕션 코드 구현
   test("로또 번호에 중복된 숫자가 있으면 예외가 발생한다.", () => {
     expect(() => {
       new Lotto([1, 2, 3, 4, 5, 5]);
     }).toThrow("[ERROR]");
   });
 
-  // TODO: 추가 기능 구현에 따른 테스트 코드 작성
+  test("범위 밖(0 포함)이면 예외", () => {
+    expect(() => {
+      new Lotto([0, 2, 3, 4, 5, 6]);
+    }).toThrow("[ERROR]");
+  });
+
+  test("범위 밖(46 포함)이면 예외", () => {
+    expect(() => {
+      new Lotto([1, 2, 3, 4, 5, 46]);
+    }).toThrow("[ERROR]");
+  });
+
+  test("정수가 아니면(소수 포함) 예외", () => {
+    expect(() => {
+      new Lotto([1, 2, 3, 4, 5, 6.5]);
+    }).toThrow("[ERROR]");
+  });
+
+  test("정수가 아니면(문자열 포함) 예외", () => {
+    expect(() => {
+      // 문자열 '1' 포함 → 정수 아님 → 예외
+      new Lotto(["1", 2, 3, 4, 5, 6]);
+    }).toThrow("[ERROR]");
+  });
+
+  test("내부 저장은 오름차순으로 정렬된다.", () => {
+    const lotto = new Lotto([6, 1, 3, 2, 5, 4]);
+    expect(lotto.getNumbers()).toEqual([1, 2, 3, 4, 5, 6]);
+  });
+
+  test("getNumbers는 불변성을 보장한다(복사본 반환).", () => {
+    const lotto = new Lotto([1, 2, 3, 4, 5, 6]);
+    const arr = lotto.getNumbers();
+    arr[0] = 999;
+    expect(lotto.getNumbers()).toEqual([1, 2, 3, 4, 5, 6]);
+  });
+
+  test("경계값 1과 45는 유효하다.", () => {
+    expect(() => {
+      new Lotto([1, 3, 10, 20, 30, 45]);
+    }).not.toThrow();
+  });
+
+  test("로또 번호의 개수가 6개 미만이면 예외가 발생한다.", () => {
+    expect(() => {
+      new Lotto([1, 2, 3, 4, 5]);
+    }).toThrow("[ERROR]");
+  });
 });
diff --git a/__tests__/ServiceTest.js b/__tests__/ServiceTest.js
new file mode 100644
index 000000000..c9a779162
--- /dev/null
+++ b/__tests__/ServiceTest.js
@@ -0,0 +1,38 @@
+import { rankResolver, evaluate } from "../src/service/lottoService.js";
+import Lotto from "../src/Lotto";
+import { PRIZE } from "../src/constants.js";
+
+describe("서비스 로직 테스트", () => {
+  test("rankResolver: 5개 + 보너스 일치면 SECOND", () => {
+    const ticket = new Lotto([1, 2, 3, 4, 5, 7]); // 보너스 7 포함
+    const winning = [1, 2, 3, 4, 5, 6];
+    const bonus = 7;
+    const rank = rankResolver(ticket.getNumbers(), winning, bonus);
+    expect(rank).toBe("SECOND");
+  });
+
+  test("evaluate: 집계/상금 합계 계산", () => {
+    const tickets = [
+      new Lotto([1, 2, 3, 4, 5, 6]),    // FIRST
+      new Lotto([1, 2, 3, 4, 5, 7]),    // SECOND (보너스 7)
+      new Lotto([1, 2, 3, 4, 10, 11]),  // FOURTH
+      new Lotto([1, 2, 3, 20, 21, 22]), // FIFTH
+      new Lotto([40, 41, 42, 43, 44, 45]), // NONE
+    ];
+    const winning = [1, 2, 3, 4, 5, 6];
+    const bonus = 7;
+
+    const { counts, totalPrize } = evaluate(tickets, winning, bonus);
+
+    expect(counts).toEqual({
+      FIRST: 1,
+      SECOND: 1,
+      THIRD: 0,
+      FOURTH: 1,
+      FIFTH: 1,
+    });
+
+    const expected = PRIZE.FIRST + PRIZE.SECOND + PRIZE.FOURTH + PRIZE.FIFTH;
+    expect(totalPrize).toBe(expected);
+  });
+});