From 54db27f3fa4340c0c392ed14dfb880f131e193eb Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 00:59:39 +0900
Subject: [PATCH 01/12] =?UTF-8?q?docs:=20=EC=BD=98=EC=86=94=20=EA=B8=B0?=
 =?UTF-8?q?=EB=B0=98=20=EB=A1=9C=EB=98=90=20=EA=B2=8C=EC=9E=84=20=EA=B8=B0?=
 =?UTF-8?q?=EB=8A=A5=20=EC=9A=94=EA=B5=AC=20=EC=82=AC=ED=95=AD=20=EC=9E=91?=
 =?UTF-8?q?=EC=84=B1?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/docs/REQUIREMENTS.md | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 src/docs/REQUIREMENTS.md

diff --git a/src/docs/REQUIREMENTS.md b/src/docs/REQUIREMENTS.md
new file mode 100644
index 000000000..1a0369d59
--- /dev/null
+++ b/src/docs/REQUIREMENTS.md
@@ -0,0 +1,29 @@
+# 기능 요구 사항
+
+## 1단계 - 콘솔 기반 로또 게임
+
+### 입출력
+-[ ] 사용자로부터 구입 금액을 입력받는다.
+-[ ] 사용자로부터 당첨 번호(6개)와 보너스 번호(1개)를 입력받는다.
+-[ ] 발행된 로또 번호들을 출력한다.
+-[ ] 등수별 당첨 개수를 출력한다.
+  - `3개 일치 (5,000원) - 1개` 의 형식으로 출력한다.
+-[ ] 총 수익률을 출력한다.
+  
+### 로또
+-[ ] 로또 1장의 가격은 1,000원이다.
+-[ ] 구입 금액에 따라 구입 금액에 해당하는 만큼 로또를 발행해야 한다.
+-[ ] 로또 1장은 1~45 범위의 중복되지 않은 6개의 숫자로 구성된다.
+
+### 로또 게임
+-[ ] 입력받은 당첨 번호와 보너스 번호를 검증한다.
+-[ ] 사용자가 구매한 로또 번호와 당첨 번호를 비교해 등수를 판정한다.
+-[ ] 당첨 기준 및 상금은 다음과 같다:
+  - 1등: 6개 번호 일치 / 2,000,000,000원
+  - 2등: 5개 번호 + 보너스 번호 일치 / 30,000,000원
+  - 3등: 5개 번호 일치 / 1,500,000원
+  - 4등: 4개 번호 일치 / 50,000원
+  - 5등: 3개 번호 일치 / 5,000원
+-[ ] 전체 당첨 결과를 집계한다.
+-[ ] 총 수익률을 계산한다. (총 당첨금 ÷ 구입 금액 * 100)
+  - 수익률은 소수점 셋째 자리에서 반올림하여 둘째 자리까지만 유지한다.

From 6424440c8040a4415c740691296b51c5152bebf4 Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 16:24:06 +0900
Subject: [PATCH 02/12] =?UTF-8?q?feat:=20=EA=B5=AC=EC=9E=85=20=EA=B8=88?=
 =?UTF-8?q?=EC=95=A1=EC=97=90=20=EB=94=B0=EB=9D=BC=20=EA=B5=AC=EC=9E=85=20?=
 =?UTF-8?q?=EA=B8=88=EC=95=A1=EC=97=90=20=ED=95=B4=EB=8B=B9=ED=95=98?=
 =?UTF-8?q?=EB=8A=94=20=EB=A7=8C=ED=81=BC=20=EB=A1=9C=EB=98=90=EB=A5=BC=20?=
 =?UTF-8?q?=EB=B0=9C=ED=96=89=20=ED=95=9C=EB=8B=A4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 __tests__/lotto.test.js  | 26 ++++++++++++++++++++++++++
 src/docs/REQUIREMENTS.md |  4 ++--
 src/errors/lottoError.js |  7 +++++++
 src/lotto.js             | 11 +++++++++++
 4 files changed, 46 insertions(+), 2 deletions(-)
 create mode 100644 __tests__/lotto.test.js
 create mode 100644 src/errors/lottoError.js
 create mode 100644 src/lotto.js

diff --git a/__tests__/lotto.test.js b/__tests__/lotto.test.js
new file mode 100644
index 000000000..06029a703
--- /dev/null
+++ b/__tests__/lotto.test.js
@@ -0,0 +1,26 @@
+import { getTicket } from '../src/lotto.js'
+import { LottoError } from '../src/errors/lottoError.js'
+
+describe('getTicket 함수 테스트', () => {
+  it('1,000원을 입력하면 1장을 발급한다', () => {
+    const money = 1000
+
+    expect(getTicket(money)).toBe(1)
+  })
+
+  it('1,000원 단위로 티켓을 발급하며, 2,500원을 입력하면 2장을 발급한다', () => {
+    const money = 2500
+
+    expect(getTicket(money)).toBe(2)
+  })
+
+  it('1,000원 미만은 에러를 발생시킨다', () => {
+    const money = 900
+
+    expect(() => getTicket(money)).toThrow(LottoError.TicketPriceTooLow())
+  })
+
+  it('금액을 입력하지 않으면 에러를 발생시킨다', () => {
+    expect(() => getTicket()).toThrow(LottoError.TicketPriceTooLow())
+  })
+})
\ No newline at end of file
diff --git a/src/docs/REQUIREMENTS.md b/src/docs/REQUIREMENTS.md
index 1a0369d59..bf72fc448 100644
--- a/src/docs/REQUIREMENTS.md
+++ b/src/docs/REQUIREMENTS.md
@@ -11,8 +11,8 @@
 -[ ] 총 수익률을 출력한다.
   
 ### 로또
--[ ] 로또 1장의 가격은 1,000원이다.
--[ ] 구입 금액에 따라 구입 금액에 해당하는 만큼 로또를 발행해야 한다.
+-[x] 로또 1장의 가격은 1,000원이다.
+-[x] 구입 금액에 따라 구입 금액에 해당하는 만큼 로또를 발행해야 한다.
 -[ ] 로또 1장은 1~45 범위의 중복되지 않은 6개의 숫자로 구성된다.
 
 ### 로또 게임
diff --git a/src/errors/lottoError.js b/src/errors/lottoError.js
new file mode 100644
index 000000000..624511638
--- /dev/null
+++ b/src/errors/lottoError.js
@@ -0,0 +1,7 @@
+function ticketPriceTooLow() {
+  return new Error('구매 금액은 최소 1,000원 이상이어야 합니다.')
+}
+
+export const LottoError = {
+  TicketPriceTooLow: ticketPriceTooLow,
+}
\ No newline at end of file
diff --git a/src/lotto.js b/src/lotto.js
new file mode 100644
index 000000000..9cbe9e8df
--- /dev/null
+++ b/src/lotto.js
@@ -0,0 +1,11 @@
+import { LottoError } from './errors/lottoError.js'
+
+const LOTTO_PRICE = 1000
+
+export function getTicket(money) {
+  if (!money || money < LOTTO_PRICE) {
+    throw LottoError.TicketPriceTooLow()
+  }
+
+  return Math.floor(money / LOTTO_PRICE)
+}
\ No newline at end of file

From 95fe914fccbc72778406594bd091c05b8757de8f Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 16:33:03 +0900
Subject: [PATCH 03/12] =?UTF-8?q?feat:=20=EB=A1=9C=EB=98=90=201=EC=9E=A5?=
 =?UTF-8?q?=EC=9D=80=201~45=20=EB=B2=94=EC=9C=84=EC=9D=98=20=EC=A4=91?=
 =?UTF-8?q?=EB=B3=B5=EB=90=98=EC=A7=80=20=EC=95=8A=EC=9D=80=206=EA=B0=9C?=
 =?UTF-8?q?=EC=9D=98=20=EC=88=AB=EC=9E=90=EB=A1=9C=20=EA=B5=AC=EC=84=B1?=
 =?UTF-8?q?=EB=90=9C=EB=8B=A4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 __tests__/lotto.test.js | 25 ++++++++++++++++++++++++-
 src/lotto.js            | 12 ++++++++++++
 2 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/__tests__/lotto.test.js b/__tests__/lotto.test.js
index 06029a703..39a9e0c83 100644
--- a/__tests__/lotto.test.js
+++ b/__tests__/lotto.test.js
@@ -1,4 +1,4 @@
-import { getTicket } from '../src/lotto.js'
+import { generateLottoNumber, getTicket } from '../src/lotto.js'
 import { LottoError } from '../src/errors/lottoError.js'
 
 describe('getTicket 함수 테스트', () => {
@@ -23,4 +23,27 @@ describe('getTicket 함수 테스트', () => {
   it('금액을 입력하지 않으면 에러를 발생시킨다', () => {
     expect(() => getTicket()).toThrow(LottoError.TicketPriceTooLow())
   })
+})
+
+describe('generateLottoNumber 함수 테스트', () => {
+  it('6개의 숫자로 구성된다', () => {
+    const numbers = generateLottoNumber()
+
+    expect(numbers).toHaveLength(6)
+  })
+
+  it('6개의 숫자는 중복되지 않는다', () => {
+    const numbers = new Set(generateLottoNumber())
+
+    expect(numbers.size).toBe(6)
+  })
+
+  it('1~45 범위의 숫자들로 구성된다', () => {
+    const numbers = generateLottoNumber()
+
+    numbers.forEach(number => {
+      expect(number).toBeGreaterThanOrEqual(1)
+      expect(number).toBeLessThanOrEqual(45)
+    })
+  })
 })
\ No newline at end of file
diff --git a/src/lotto.js b/src/lotto.js
index 9cbe9e8df..3d4765221 100644
--- a/src/lotto.js
+++ b/src/lotto.js
@@ -1,6 +1,7 @@
 import { LottoError } from './errors/lottoError.js'
 
 const LOTTO_PRICE = 1000
+const LOTTO_NUMBERS_LENGTH = 6
 
 export function getTicket(money) {
   if (!money || money < LOTTO_PRICE) {
@@ -8,4 +9,15 @@ export function getTicket(money) {
   }
 
   return Math.floor(money / LOTTO_PRICE)
+}
+
+export function generateLottoNumber() {
+  const numbers = new Set()
+
+  while (numbers.size < LOTTO_NUMBERS_LENGTH) {
+    const num = Math.floor(Math.random() * 45) + 1
+    numbers.add(num)
+  }
+
+  return Array.from(numbers)
 }
\ No newline at end of file

From c2c32c9a25c7dd7e08c00900a12577fb66c71cbd Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 16:38:27 +0900
Subject: [PATCH 04/12] =?UTF-8?q?feat:=20getTicket=20=EB=B0=98=ED=99=98?=
 =?UTF-8?q?=EA=B0=92=EC=9D=84=20=EB=A1=9C=EB=98=90=20=EB=B2=88=ED=98=B8=20?=
 =?UTF-8?q?=EB=B0=B0=EC=97=B4=EB=A1=9C=20=EB=B3=80=EA=B2=BD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 __tests__/lotto.test.js  | 4 ++--
 src/docs/REQUIREMENTS.md | 2 +-
 src/lotto.js             | 3 ++-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/__tests__/lotto.test.js b/__tests__/lotto.test.js
index 39a9e0c83..206c6caec 100644
--- a/__tests__/lotto.test.js
+++ b/__tests__/lotto.test.js
@@ -5,13 +5,13 @@ describe('getTicket 함수 테스트', () => {
   it('1,000원을 입력하면 1장을 발급한다', () => {
     const money = 1000
 
-    expect(getTicket(money)).toBe(1)
+    expect(getTicket(money)).toHaveLength(1)
   })
 
   it('1,000원 단위로 티켓을 발급하며, 2,500원을 입력하면 2장을 발급한다', () => {
     const money = 2500
 
-    expect(getTicket(money)).toBe(2)
+    expect(getTicket(money)).toHaveLength(2)
   })
 
   it('1,000원 미만은 에러를 발생시킨다', () => {
diff --git a/src/docs/REQUIREMENTS.md b/src/docs/REQUIREMENTS.md
index bf72fc448..683a7710e 100644
--- a/src/docs/REQUIREMENTS.md
+++ b/src/docs/REQUIREMENTS.md
@@ -13,7 +13,7 @@
 ### 로또
 -[x] 로또 1장의 가격은 1,000원이다.
 -[x] 구입 금액에 따라 구입 금액에 해당하는 만큼 로또를 발행해야 한다.
--[ ] 로또 1장은 1~45 범위의 중복되지 않은 6개의 숫자로 구성된다.
+-[x] 로또 1장은 1~45 범위의 중복되지 않은 6개의 숫자로 구성된다.
 
 ### 로또 게임
 -[ ] 입력받은 당첨 번호와 보너스 번호를 검증한다.
diff --git a/src/lotto.js b/src/lotto.js
index 3d4765221..2483785ee 100644
--- a/src/lotto.js
+++ b/src/lotto.js
@@ -8,7 +8,8 @@ export function getTicket(money) {
     throw LottoError.TicketPriceTooLow()
   }
 
-  return Math.floor(money / LOTTO_PRICE)
+  const ticketCount = Math.floor(money / LOTTO_PRICE)
+  return Array.from({ length: ticketCount }, () => generateLottoNumber())
 }
 
 export function generateLottoNumber() {

From 5e8718d6ba72d2272e9767dacb8ae364557cc11e Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 17:45:40 +0900
Subject: [PATCH 05/12] =?UTF-8?q?feat:=20=EC=82=AC=EC=9A=A9=EC=9E=90?=
 =?UTF-8?q?=EA=B0=80=20=EA=B5=AC=EB=A7=A4=ED=95=9C=20=EB=A1=9C=EB=98=90=20?=
 =?UTF-8?q?=EB=B2=88=ED=98=B8=EC=99=80=20=EB=8B=B9=EC=B2=A8=20=EB=B2=88?=
 =?UTF-8?q?=ED=98=B8=EB=A5=BC=20=EB=B9=84=EA=B5=90=ED=95=B4=20=EB=93=B1?=
 =?UTF-8?q?=EC=88=98=EB=A5=BC=20=ED=8C=90=EC=A0=95=ED=95=9C=EB=8B=A4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 __tests__/lottoGame.test.js | 39 +++++++++++++++++++++++++++++++++++++
 src/docs/REQUIREMENTS.md    |  6 +++---
 src/lottoGame.js            | 20 +++++++++++++++++++
 3 files changed, 62 insertions(+), 3 deletions(-)
 create mode 100644 __tests__/lottoGame.test.js
 create mode 100644 src/lottoGame.js

diff --git a/__tests__/lottoGame.test.js b/__tests__/lottoGame.test.js
new file mode 100644
index 000000000..91a7a6cb4
--- /dev/null
+++ b/__tests__/lottoGame.test.js
@@ -0,0 +1,39 @@
+import { getRank } from '../src/lottoGame.js'
+
+describe('getRank 함수 테스트', () => {
+  let winningNumbers
+  let winningBonusNumber
+
+  beforeEach(() => {
+    winningNumbers = [1, 2, 3, 4, 5, 6]
+    winningBonusNumber = 7
+  })
+
+  it('숫자 3개가 일치하면 5,000원을 받는다', () => {
+    const ticketNumbers = [1, 2, 3, 14, 15, 16]
+    const rank = getRank(ticketNumbers, winningNumbers, winningBonusNumber)
+
+    expect(rank.price).toBe(5_000)
+  })
+
+  it('보너스 번호 제외 숫자 5개가 일치하면 1,500,000원을 받는다', () => {
+    const ticketNumbers = [1, 2, 3, 4, 5, 16]
+    const rank = getRank(ticketNumbers, winningNumbers, winningBonusNumber)
+
+    expect(rank.price).toBe(1_500_000)
+  })
+
+  it('보너스 번호 포함 숫자 6개가 일치하면 30,000,000원을 받는다', () => {
+    const ticketNumbers = [1, 2, 3, 4, 5, 7]
+    const rank = getRank(ticketNumbers, winningNumbers, winningBonusNumber)
+
+    expect(rank.price).toBe(30_000_000)
+  })
+
+  it('숫자 6개가 전부 일치하면 2,000,000,000원을 받는다', () => {
+    const ticketNumbers = [1, 2, 3, 4, 5, 6]
+    const rank = getRank(ticketNumbers, winningNumbers, winningBonusNumber)
+
+    expect(rank.price).toBe(2_000_000_000)
+  })
+})
\ No newline at end of file
diff --git a/src/docs/REQUIREMENTS.md b/src/docs/REQUIREMENTS.md
index 683a7710e..74b5da64f 100644
--- a/src/docs/REQUIREMENTS.md
+++ b/src/docs/REQUIREMENTS.md
@@ -16,9 +16,9 @@
 -[x] 로또 1장은 1~45 범위의 중복되지 않은 6개의 숫자로 구성된다.
 
 ### 로또 게임
--[ ] 입력받은 당첨 번호와 보너스 번호를 검증한다.
--[ ] 사용자가 구매한 로또 번호와 당첨 번호를 비교해 등수를 판정한다.
--[ ] 당첨 기준 및 상금은 다음과 같다:
+-[x] 입력받은 당첨 번호와 보너스 번호를 검증한다.
+-[x] 사용자가 구매한 로또 번호와 당첨 번호를 비교해 등수를 판정한다.
+-[x] 당첨 기준 및 상금은 다음과 같다:
   - 1등: 6개 번호 일치 / 2,000,000,000원
   - 2등: 5개 번호 + 보너스 번호 일치 / 30,000,000원
   - 3등: 5개 번호 일치 / 1,500,000원
diff --git a/src/lottoGame.js b/src/lottoGame.js
new file mode 100644
index 000000000..0a8a1f2a4
--- /dev/null
+++ b/src/lottoGame.js
@@ -0,0 +1,20 @@
+const LOTTO_RANK_TABLE = [
+  { rank: 1, matchCount: 6, price: 2_000_000_000 },
+  { rank: 2, matchCount: 5, price: 30_000_000, bonus: true },
+  { rank: 3, matchCount: 5, price: 1_500_000 },
+  { rank: 4, matchCount: 4, price: 50_000 },
+  { rank: 5, matchCount: 3, price: 5_000 },
+]
+
+export function getRank(ticketNumbers, winningNumbers, winningBonusNumber) {
+  const matchCount = ticketNumbers.filter(num => winningNumbers.includes(num)).length;
+  const hasBonusNumber = ticketNumbers.includes(winningBonusNumber)
+
+  return LOTTO_RANK_TABLE.find(rank => {
+    if (rank.bonus) {
+      return hasBonusNumber && rank.matchCount === matchCount
+    }
+
+    return rank.matchCount === matchCount
+  })
+}
\ No newline at end of file

From fe9692f0e18ce5ca16643a8bda5dbb9fb6ef5bd9 Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 19:11:24 +0900
Subject: [PATCH 06/12] =?UTF-8?q?feat:=20=EA=B5=AC=EB=A7=A4=20=EA=B8=88?=
 =?UTF-8?q?=EC=95=A1=EA=B3=BC=20=EB=8B=B9=EC=B2=A8=EA=B8=88=EC=9C=BC?=
 =?UTF-8?q?=EB=A1=9C=20=EC=B4=9D=20=EC=88=98=EC=9D=B5=EB=A5=A0=EC=9D=84=20?=
 =?UTF-8?q?=EA=B3=84=EC=82=B0=ED=95=9C=EB=8B=A4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 __tests__/lottoGame.test.js | 18 +++++++++++++++++-
 src/docs/REQUIREMENTS.md    |  3 +--
 src/lottoGame.js            |  8 +++++++-
 3 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/__tests__/lottoGame.test.js b/__tests__/lottoGame.test.js
index 91a7a6cb4..0a6b26e52 100644
--- a/__tests__/lottoGame.test.js
+++ b/__tests__/lottoGame.test.js
@@ -1,4 +1,4 @@
-import { getRank } from '../src/lottoGame.js'
+import { calculateProfitRate, getRank } from '../src/lottoGame.js'
 
 describe('getRank 함수 테스트', () => {
   let winningNumbers
@@ -36,4 +36,20 @@ describe('getRank 함수 테스트', () => {
 
     expect(rank.price).toBe(2_000_000_000)
   })
+})
+
+describe('calculateProfitRate 함수 테스트', () => {
+  it('구매 금액과 당첨금으로 총 수익률을 계산한다', () => {
+    const purchaseAmount = 10_000
+    const totalWinnings = 50_000
+
+    expect(calculateProfitRate(purchaseAmount, totalWinnings)).toBe(500)
+  })
+
+  it('수익률은 소수점 셋째 자리에서 반올림하여 둘째 자리까지만 유지한다', () => {
+    const purchaseAmount = 30_000
+    const totalWinnings = 5_000
+
+    expect(calculateProfitRate(purchaseAmount, totalWinnings)).toBe(16.67)
+  })
 })
\ No newline at end of file
diff --git a/src/docs/REQUIREMENTS.md b/src/docs/REQUIREMENTS.md
index 74b5da64f..13aba2708 100644
--- a/src/docs/REQUIREMENTS.md
+++ b/src/docs/REQUIREMENTS.md
@@ -24,6 +24,5 @@
   - 3등: 5개 번호 일치 / 1,500,000원
   - 4등: 4개 번호 일치 / 50,000원
   - 5등: 3개 번호 일치 / 5,000원
--[ ] 전체 당첨 결과를 집계한다.
--[ ] 총 수익률을 계산한다. (총 당첨금 ÷ 구입 금액 * 100)
+-[x] 총 수익률을 계산한다. (총 당첨금 ÷ 구입 금액 * 100)
   - 수익률은 소수점 셋째 자리에서 반올림하여 둘째 자리까지만 유지한다.
diff --git a/src/lottoGame.js b/src/lottoGame.js
index 0a8a1f2a4..c353b9573 100644
--- a/src/lottoGame.js
+++ b/src/lottoGame.js
@@ -7,7 +7,7 @@ const LOTTO_RANK_TABLE = [
 ]
 
 export function getRank(ticketNumbers, winningNumbers, winningBonusNumber) {
-  const matchCount = ticketNumbers.filter(num => winningNumbers.includes(num)).length;
+  const matchCount = ticketNumbers.filter(num => winningNumbers.includes(num)).length
   const hasBonusNumber = ticketNumbers.includes(winningBonusNumber)
 
   return LOTTO_RANK_TABLE.find(rank => {
@@ -17,4 +17,10 @@ export function getRank(ticketNumbers, winningNumbers, winningBonusNumber) {
 
     return rank.matchCount === matchCount
   })
+}
+
+export function calculateProfitRate(purchaseAmount, totalWinnings) {
+  const rate = (totalWinnings / purchaseAmount) * 100
+
+  return Math.round(rate * 100) / 100
 }
\ No newline at end of file

From c8486c88ac1e5fdcdc8f4d421b19e3cce1b9ebfd Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 20:00:22 +0900
Subject: [PATCH 07/12] =?UTF-8?q?feat:=20=EC=BD=98=EC=86=94=20=EC=9E=85?=
 =?UTF-8?q?=EB=A0=A5=EC=9D=84=20=EC=B2=98=EB=A6=AC=ED=95=98=EB=8A=94=20rea?=
 =?UTF-8?q?dlineAsync=20=EC=9C=A0=ED=8B=B8=20=ED=95=A8=EC=88=98=20?=
 =?UTF-8?q?=EC=B6=94=EA=B0=80?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/utils/readlineAsync.js | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/utils/readlineAsync.js

diff --git a/src/utils/readlineAsync.js b/src/utils/readlineAsync.js
new file mode 100644
index 000000000..69f55c940
--- /dev/null
+++ b/src/utils/readlineAsync.js
@@ -0,0 +1,23 @@
+import readline from 'readline';
+
+export function readLineAsync(query) {
+  return new Promise((resolve, reject) => {
+    if (arguments.length !== 1) {
+      reject(new Error('arguments must be 1'));
+    }
+
+    if (typeof query !== 'string') {
+      reject(new Error('query must be string'));
+    }
+
+    const rl = readline.createInterface({
+      input: process.stdin,
+      output: process.stdout,
+    });
+
+    rl.question(query, (input) => {
+      rl.close();
+      resolve(input);
+    });
+  });
+}
\ No newline at end of file

From 730d0a647f2c366ea9266b37d1d5c941cf4b42a5 Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 20:15:48 +0900
Subject: [PATCH 08/12] =?UTF-8?q?refactor:=20LOTTO=5FRANK=5FTABLE=EC=9D=98?=
 =?UTF-8?q?=20price=EB=A5=BC=20prize=EB=A1=9C=20=EB=B3=80=EA=B2=BD?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 __tests__/lottoGame.test.js |  8 ++++----
 src/lottoGame.js            | 10 +++++-----
 2 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/__tests__/lottoGame.test.js b/__tests__/lottoGame.test.js
index 0a6b26e52..be76f11de 100644
--- a/__tests__/lottoGame.test.js
+++ b/__tests__/lottoGame.test.js
@@ -13,28 +13,28 @@ describe('getRank 함수 테스트', () => {
     const ticketNumbers = [1, 2, 3, 14, 15, 16]
     const rank = getRank(ticketNumbers, winningNumbers, winningBonusNumber)
 
-    expect(rank.price).toBe(5_000)
+    expect(rank.prize).toBe(5_000)
   })
 
   it('보너스 번호 제외 숫자 5개가 일치하면 1,500,000원을 받는다', () => {
     const ticketNumbers = [1, 2, 3, 4, 5, 16]
     const rank = getRank(ticketNumbers, winningNumbers, winningBonusNumber)
 
-    expect(rank.price).toBe(1_500_000)
+    expect(rank.prize).toBe(1_500_000)
   })
 
   it('보너스 번호 포함 숫자 6개가 일치하면 30,000,000원을 받는다', () => {
     const ticketNumbers = [1, 2, 3, 4, 5, 7]
     const rank = getRank(ticketNumbers, winningNumbers, winningBonusNumber)
 
-    expect(rank.price).toBe(30_000_000)
+    expect(rank.prize).toBe(30_000_000)
   })
 
   it('숫자 6개가 전부 일치하면 2,000,000,000원을 받는다', () => {
     const ticketNumbers = [1, 2, 3, 4, 5, 6]
     const rank = getRank(ticketNumbers, winningNumbers, winningBonusNumber)
 
-    expect(rank.price).toBe(2_000_000_000)
+    expect(rank.prize).toBe(2_000_000_000)
   })
 })
 
diff --git a/src/lottoGame.js b/src/lottoGame.js
index c353b9573..842ed50b4 100644
--- a/src/lottoGame.js
+++ b/src/lottoGame.js
@@ -1,9 +1,9 @@
 const LOTTO_RANK_TABLE = [
-  { rank: 1, matchCount: 6, price: 2_000_000_000 },
-  { rank: 2, matchCount: 5, price: 30_000_000, bonus: true },
-  { rank: 3, matchCount: 5, price: 1_500_000 },
-  { rank: 4, matchCount: 4, price: 50_000 },
-  { rank: 5, matchCount: 3, price: 5_000 },
+  { rank: 1, matchCount: 6, prize: 2_000_000_000 },
+  { rank: 2, matchCount: 5, prize: 30_000_000, bonus: true },
+  { rank: 3, matchCount: 5, prize: 1_500_000 },
+  { rank: 4, matchCount: 4, prize: 50_000 },
+  { rank: 5, matchCount: 3, prize: 5_000 },
 ]
 
 export function getRank(ticketNumbers, winningNumbers, winningBonusNumber) {

From 5dc4e3b9e1c3402bada3e0b6dbc4f94785a1f41c Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 20:55:31 +0900
Subject: [PATCH 09/12] =?UTF-8?q?feat:=20=EB=A1=9C=EB=98=90=20=EA=B2=8C?=
 =?UTF-8?q?=EC=9E=84=20=EC=9E=85=EC=B6=9C=EB=A0=A5=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

---
 src/docs/REQUIREMENTS.md | 10 +++---
 src/lotto.js             |  2 +-
 src/lottoGame.js         |  2 +-
 src/step1-index.js       | 68 +++++++++++++++++++++++++++++++++++++---
 4 files changed, 71 insertions(+), 11 deletions(-)

diff --git a/src/docs/REQUIREMENTS.md b/src/docs/REQUIREMENTS.md
index 13aba2708..7aecd8fbd 100644
--- a/src/docs/REQUIREMENTS.md
+++ b/src/docs/REQUIREMENTS.md
@@ -3,12 +3,12 @@
 ## 1단계 - 콘솔 기반 로또 게임
 
 ### 입출력
--[ ] 사용자로부터 구입 금액을 입력받는다.
--[ ] 사용자로부터 당첨 번호(6개)와 보너스 번호(1개)를 입력받는다.
--[ ] 발행된 로또 번호들을 출력한다.
--[ ] 등수별 당첨 개수를 출력한다.
+-[x] 사용자로부터 구입 금액을 입력받는다.
+-[x] 사용자로부터 당첨 번호(6개)와 보너스 번호(1개)를 입력받는다.
+-[x] 발행된 로또 번호들을 출력한다.
+-[x] 등수별 당첨 개수를 출력한다.
   - `3개 일치 (5,000원) - 1개` 의 형식으로 출력한다.
--[ ] 총 수익률을 출력한다.
+-[x] 총 수익률을 출력한다.
   
 ### 로또
 -[x] 로또 1장의 가격은 1,000원이다.
diff --git a/src/lotto.js b/src/lotto.js
index 2483785ee..7a5a9af4b 100644
--- a/src/lotto.js
+++ b/src/lotto.js
@@ -1,6 +1,6 @@
 import { LottoError } from './errors/lottoError.js'
 
-const LOTTO_PRICE = 1000
+export const LOTTO_PRICE = 1000
 const LOTTO_NUMBERS_LENGTH = 6
 
 export function getTicket(money) {
diff --git a/src/lottoGame.js b/src/lottoGame.js
index 842ed50b4..25f934777 100644
--- a/src/lottoGame.js
+++ b/src/lottoGame.js
@@ -1,4 +1,4 @@
-const LOTTO_RANK_TABLE = [
+export const LOTTO_RANK_TABLE = [
   { rank: 1, matchCount: 6, prize: 2_000_000_000 },
   { rank: 2, matchCount: 5, prize: 30_000_000, bonus: true },
   { rank: 3, matchCount: 5, prize: 1_500_000 },
diff --git a/src/step1-index.js b/src/step1-index.js
index 44313b450..9b16dd2e1 100644
--- a/src/step1-index.js
+++ b/src/step1-index.js
@@ -1,4 +1,64 @@
-/**
- * step 1의 시작점이 되는 파일입니다.
- * 브라우저 환경에서 사용하는 css 파일 등을 불러올 경우 정상적으로 빌드할 수 없습니다.
- */
+import { readLineAsync } from './utils/readlineAsync.js'
+import { getTicket, LOTTO_PRICE } from './lotto.js'
+import { calculateProfitRate, getRank, LOTTO_RANK_TABLE } from './lottoGame.js'
+
+async function start() {
+  const purchaseAmount = await readLineAsync('구입 금액을 입력해 주세요. ')
+  const tickets = getTicket(purchaseAmount)
+
+  printTicket(tickets)
+
+  let winningNumbers = await readLineAsync('당첨 번호를 입력해 주세요. ')
+  winningNumbers = winningNumbers.split(',').map(num => Number(num.trim()))
+  const bonusNumber = await readLineAsync('보너스 번호를 입력해 주세요. ')
+
+  printResults(tickets, winningNumbers, bonusNumber)
+}
+
+function printTicket(tickets) {
+  console.log(`${tickets.length}개를 구매했습니다.`)
+  tickets.forEach(ticket => console.log(ticket))
+}
+
+function printResults(tickets, winningNumbers, bonusNumber) {
+  const results = tickets.map(ticket => getRank(ticket, winningNumbers, bonusNumber)).filter(Boolean)
+
+  if (!results?.length) {
+    console.log('낙첨되었습니다.')
+    return
+  }
+
+  const stats = getRankStatistics(results)
+
+  console.log('당첨 통계')
+  console.log('--------------------')
+
+  let totalWinnings = 0
+  stats.forEach(({ matchCount, prize, bonus, count }) => {
+    totalWinnings += prize * count
+    console.log(`${matchCount}개 일치${bonus ? ', 보너스 볼 일치': ''} (${prize.toLocaleString()}원) - ${count.toLocaleString()}개`)
+  })
+
+  console.log(`총 수익률은 ${calculateProfitRate(tickets.length * LOTTO_PRICE, totalWinnings)}% 입니다.`)
+}
+
+function getRankStatistics(results) {
+  const stats = LOTTO_RANK_TABLE.map(rank => ({
+    ...rank,
+    count: 0,
+  }))
+
+  results.forEach(result => {
+    const rankIndex = stats.findIndex(rank =>
+      rank.matchCount === result.matchCount && rank.bonus === result.bonus
+    )
+
+    if (rankIndex !== -1) {
+      stats[rankIndex].count += 1
+    }
+  })
+
+  return stats.reverse()
+}
+
+await start()
\ No newline at end of file

From bb8cb74eeeaa64da6cc2ad482b7dbb12aef0040d Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 22:36:48 +0900
Subject: [PATCH 10/12] =?UTF-8?q?refactor:=20=EB=A1=9C=EB=98=90=20?=
 =?UTF-8?q?=EA=B2=8C=EC=9E=84=20=EC=9E=85=EC=B6=9C=EB=A0=A5=20=EB=8B=A8?=
 =?UTF-8?q?=EA=B3=84=EB=A5=BC=20=EB=A9=94=EC=84=9C=EB=93=9C=EB=A1=9C=20?=
 =?UTF-8?q?=EB=B6=84=EB=A6=AC=ED=95=98=EA=B3=A0=20=EC=B6=9C=EB=A0=A5=20?=
 =?UTF-8?q?=EB=A1=9C=EC=A7=81=EC=9D=84=20lottoPrint.js=EB=A1=9C=20?=
 =?UTF-8?q?=EC=9D=B4=EB=8F=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/lottoPrint.js  | 22 +++++++++++++++++++++
 src/step1-index.js | 49 +++++++++++++++++++++-------------------------
 2 files changed, 44 insertions(+), 27 deletions(-)
 create mode 100644 src/lottoPrint.js

diff --git a/src/lottoPrint.js b/src/lottoPrint.js
new file mode 100644
index 000000000..4ce8cb80a
--- /dev/null
+++ b/src/lottoPrint.js
@@ -0,0 +1,22 @@
+export function printTicket(tickets) {
+  console.log(`${tickets.length}개를 구매했습니다.`)
+  tickets.forEach(ticket => console.log(ticket))
+}
+
+export function printResults(stats, totalWinnings) {
+  if (!totalWinnings) {
+    console.log('낙첨되었습니다.')
+    return
+  }
+
+  console.log('당첨 통계')
+  console.log('--------------------')
+
+  stats.forEach(({ matchCount, prize, bonus, count }) => {
+    console.log(`${matchCount}개 일치${bonus ? ', 보너스 볼 일치': ''} (${prize.toLocaleString()}원) - ${count.toLocaleString()}개`)
+  })
+}
+
+export function printProfit(profitRate) {
+  console.log(`총 수익률은 ${profitRate.toLocaleString()}% 입니다.`)
+}
\ No newline at end of file
diff --git a/src/step1-index.js b/src/step1-index.js
index 9b16dd2e1..c0184e2ab 100644
--- a/src/step1-index.js
+++ b/src/step1-index.js
@@ -1,54 +1,49 @@
 import { readLineAsync } from './utils/readlineAsync.js'
 import { getTicket, LOTTO_PRICE } from './lotto.js'
 import { calculateProfitRate, getRank, LOTTO_RANK_TABLE } from './lottoGame.js'
+import { printProfit, printResults, printTicket } from './lottoPrint.js'
 
 async function start() {
-  const purchaseAmount = await readLineAsync('구입 금액을 입력해 주세요. ')
-  const tickets = getTicket(purchaseAmount)
-
+  const tickets = await getTickets()
   printTicket(tickets)
 
-  let winningNumbers = await readLineAsync('당첨 번호를 입력해 주세요. ')
-  winningNumbers = winningNumbers.split(',').map(num => Number(num.trim()))
-  const bonusNumber = await readLineAsync('보너스 번호를 입력해 주세요. ')
+  const { winningNumbers, winningBonusNumber } = await getWinningNumber()
+  const { stats, totalWinnings } = getStatistics(tickets, winningNumbers, winningBonusNumber)
+  printResults(stats, totalWinnings)
 
-  printResults(tickets, winningNumbers, bonusNumber)
+  const profitRate = calculateProfitRate(tickets.length * LOTTO_PRICE, totalWinnings)
+  printProfit(profitRate)
 }
 
-function printTicket(tickets) {
-  console.log(`${tickets.length}개를 구매했습니다.`)
-  tickets.forEach(ticket => console.log(ticket))
+async function getTickets() {
+  const purchaseAmount = await readLineAsync('구입 금액을 입력해 주세요. ')
+  return getTicket(purchaseAmount)
 }
 
-function printResults(tickets, winningNumbers, bonusNumber) {
-  const results = tickets.map(ticket => getRank(ticket, winningNumbers, bonusNumber)).filter(Boolean)
-
-  if (!results?.length) {
-    console.log('낙첨되었습니다.')
-    return
-  }
+async function getWinningNumber() {
+  let winningNumbers = await readLineAsync('당첨 번호를 입력해 주세요. ')
+  winningNumbers = winningNumbers.split(',').map(num => Number(num.trim()))
 
-  const stats = getRankStatistics(results)
+  const winningBonusNumber = await readLineAsync('보너스 번호를 입력해 주세요. ')
 
-  console.log('당첨 통계')
-  console.log('--------------------')
+  return { winningNumbers, winningBonusNumber: Number(winningBonusNumber) }
+}
 
-  let totalWinnings = 0
-  stats.forEach(({ matchCount, prize, bonus, count }) => {
-    totalWinnings += prize * count
-    console.log(`${matchCount}개 일치${bonus ? ', 보너스 볼 일치': ''} (${prize.toLocaleString()}원) - ${count.toLocaleString()}개`)
-  })
+function getStatistics(tickets, winningNumbers, winningBonusNumber) {
+  const results = tickets.map(ticket => getRank(ticket, winningNumbers, winningBonusNumber)).filter(Boolean)
 
-  console.log(`총 수익률은 ${calculateProfitRate(tickets.length * LOTTO_PRICE, totalWinnings)}% 입니다.`)
+  return getRankStatistics(results)
 }
 
 function getRankStatistics(results) {
+  let totalWinnings = 0
   const stats = LOTTO_RANK_TABLE.map(rank => ({
     ...rank,
     count: 0,
   }))
 
   results.forEach(result => {
+    totalWinnings += result.prize
     const rankIndex = stats.findIndex(rank =>
       rank.matchCount === result.matchCount && rank.bonus === result.bonus
     )
@@ -58,7 +53,7 @@ function getRankStatistics(results) {
     }
   })
 
-  return stats.reverse()
+  return { stats: stats.reverse(), totalWinnings }
 }
 
 await start()
\ No newline at end of file

From 08345b5210dbae7a5982bc0b62a0a1d103cac4d5 Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 22:38:43 +0900
Subject: [PATCH 11/12] =?UTF-8?q?refactor:=20getRankStatistics=20=EB=A9=94?=
 =?UTF-8?q?=EC=84=9C=EB=93=9C=EB=A5=BC=20lottoGame.js=EB=A1=9C=20=EC=9D=B4?=
 =?UTF-8?q?=EB=8F=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/lottoGame.js   | 25 +++++++++++++++++++++++--
 src/step1-index.js | 24 +-----------------------
 2 files changed, 24 insertions(+), 25 deletions(-)

diff --git a/src/lottoGame.js b/src/lottoGame.js
index 25f934777..67bb9fff5 100644
--- a/src/lottoGame.js
+++ b/src/lottoGame.js
@@ -1,4 +1,4 @@
-export const LOTTO_RANK_TABLE = [
+const LOTTO_RANK_TABLE = [
   { rank: 1, matchCount: 6, prize: 2_000_000_000 },
   { rank: 2, matchCount: 5, prize: 30_000_000, bonus: true },
   { rank: 3, matchCount: 5, prize: 1_500_000 },
@@ -23,4 +23,25 @@ export function calculateProfitRate(purchaseAmount, totalWinnings) {
   const rate = (totalWinnings / purchaseAmount) * 100
 
   return Math.round(rate * 100) / 100
-}
\ No newline at end of file
+}
+
+export function getRankStatistics(results) {
+  let totalWinnings = 0
+  const stats = LOTTO_RANK_TABLE.map(rank => ({
+    ...rank,
+    count: 0,
+  }))
+
+  results.forEach(result => {
+    totalWinnings += result.prize
+    const rankIndex = stats.findIndex(rank =>
+      rank.matchCount === result.matchCount && rank.bonus === result.bonus
+    )
+
+    if (rankIndex !== -1) {
+      stats[rankIndex].count += 1
+    }
+  })
+
+  return { stats: stats.reverse(), totalWinnings }
+}
diff --git a/src/step1-index.js b/src/step1-index.js
index c0184e2ab..7420aef72 100644
--- a/src/step1-index.js
+++ b/src/step1-index.js
@@ -1,6 +1,6 @@
 import { readLineAsync } from './utils/readlineAsync.js'
 import { getTicket, LOTTO_PRICE } from './lotto.js'
-import { calculateProfitRate, getRank, LOTTO_RANK_TABLE } from './lottoGame.js'
+import { calculateProfitRate, getRank, getRankStatistics } from './lottoGame.js'
 import { printProfit, printResults, printTicket } from './lottoPrint.js'
 
 async function start() {
@@ -31,29 +31,7 @@ async function getWinningNumber() {
 
 function getStatistics(tickets, winningNumbers, winningBonusNumber) {
   const results = tickets.map(ticket => getRank(ticket, winningNumbers, winningBonusNumber)).filter(Boolean)
-
   return getRankStatistics(results)
 }
 
-function getRankStatistics(results) {
-  let totalWinnings = 0
-  const stats = LOTTO_RANK_TABLE.map(rank => ({
-    ...rank,
-    count: 0,
-  }))
-
-  results.forEach(result => {
-    totalWinnings += result.prize
-    const rankIndex = stats.findIndex(rank =>
-      rank.matchCount === result.matchCount && rank.bonus === result.bonus
-    )
-
-    if (rankIndex !== -1) {
-      stats[rankIndex].count += 1
-    }
-  })
-
-  return { stats: stats.reverse(), totalWinnings }
-}
-
 await start()
\ No newline at end of file

From 75de2374ae3b767ab1acaa0076b05f801177d375 Mon Sep 17 00:00:00 2001
From: SEMIN-97 <jsemin.1021@gmail.com>
Date: Sun, 7 Sep 2025 22:39:47 +0900
Subject: [PATCH 12/12] =?UTF-8?q?fix:=20LOTTO=5FRANK=5FTABLE=202=EB=93=B1?=
 =?UTF-8?q?=20=EC=A1=B0=EA=B1=B4=20=EC=98=A4=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/lottoGame.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lottoGame.js b/src/lottoGame.js
index 67bb9fff5..735ffe2a0 100644
--- a/src/lottoGame.js
+++ b/src/lottoGame.js
@@ -1,6 +1,6 @@
 const LOTTO_RANK_TABLE = [
   { rank: 1, matchCount: 6, prize: 2_000_000_000 },
-  { rank: 2, matchCount: 5, prize: 30_000_000, bonus: true },
+  { rank: 2, matchCount: 6, prize: 30_000_000, bonus: true },
   { rank: 3, matchCount: 5, prize: 1_500_000 },
   { rank: 4, matchCount: 4, prize: 50_000 },
   { rank: 5, matchCount: 3, prize: 5_000 },