From 8058a8930453439bec8da27f2d63cf33f348d041 Mon Sep 17 00:00:00 2001 From: AWESOMEDEV Date: Mon, 20 Jul 2026 08:39:01 +0900 Subject: [PATCH] =?UTF-8?q?test(component):=20React=20=EC=BB=B4=ED=8F=AC?= =?UTF-8?q?=EB=84=8C=ED=8A=B8=20=ED=85=8C=EC=8A=A4=ED=8A=B8=20=EB=8F=84?= =?UTF-8?q?=EC=9E=85=20(Testing=20Library,=2013=EA=B0=9C)?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 단위(순수함수)와 E2E(전체 흐름) 사이 '부품 렌더링' 층을 메운다(jsdom). - Badge(3): 코드값→한국어 라벨/색 매핑, 미지값 폴백(방어적 기본값) - ProgressBar(4): 백분율 계산·반올림, 0 나눗셈 방어(NaN 방지), 막대 너비 - CodeEditor(6): 제어 입력 왕복, 줄번호 minRows 보장/증가, Tab 공백2칸 삽입, 텍스트 선택 후 Tab 커서 위치(selectionStart+2 회귀 방지 — 과거 버그 못 박기) 세팅: @testing-library/react+jest-dom+user-event+jsdom, 파일별 @vitest-environment, 매 테스트 후 cleanup(globals 미사용 시 DOM 누적 방지). 프론트 테스트 9→22. coverage 게이트·lint·build 통과. Co-Authored-By: Claude Opus 4.8 --- frontend/package-lock.json | 759 +++++++++++++++++++ frontend/package.json | 5 + frontend/src/components/Badge.test.jsx | 28 + frontend/src/components/CodeEditor.test.jsx | 65 ++ frontend/src/components/ProgressBar.test.jsx | 30 + frontend/src/test/setup.js | 15 + frontend/vite.config.js | 4 + 7 files changed, 906 insertions(+) create mode 100644 frontend/src/components/Badge.test.jsx create mode 100644 frontend/src/components/CodeEditor.test.jsx create mode 100644 frontend/src/components/ProgressBar.test.jsx create mode 100644 frontend/src/test/setup.js diff --git a/frontend/package-lock.json b/frontend/package-lock.json index 67c6906..214df58 100644 --- a/frontend/package-lock.json +++ b/frontend/package-lock.json @@ -17,15 +17,48 @@ "devDependencies": { "@eslint/js": "^9.17.0", "@playwright/test": "1.49.1", + "@testing-library/dom": "^10.4.0", + "@testing-library/jest-dom": "^6.6.3", + "@testing-library/react": "^16.1.0", + "@testing-library/user-event": "^14.5.2", "@vitejs/plugin-react": "^4.3.4", "@vitest/coverage-v8": "^4.1.10", "eslint": "^9.17.0", "eslint-plugin-react-hooks": "^5.1.0", "globals": "^15.14.0", + "jsdom": "^26.0.0", "vite": "^6.0.7", "vitest": "^4.1.10" } }, + "node_modules/@adobe/css-tools": { + "version": "4.5.0", + "resolved": "https://registry.npmjs.org/@adobe/css-tools/-/css-tools-4.5.0.tgz", + "integrity": "sha512-6OzddxPio9UiWTCemp4N8cYLV2ZN1ncRnV1cVGtve7dhPOtRkleRyx32GQCYSwDYgaHU3USMm84tNsvKzRCa1Q==", + "dev": true, + "license": "MIT" + }, + "node_modules/@asamuzakjp/css-color": { + "version": "3.2.0", + "resolved": "https://registry.npmjs.org/@asamuzakjp/css-color/-/css-color-3.2.0.tgz", + "integrity": "sha512-K1A6z8tS3XsmCMM86xoWdn7Fkdn9m6RSVtocUrJYIwZnFVkng/PvkEoWtOWmP+Scc6saYWHWZYbndEEXxl24jw==", + "dev": true, + "license": "MIT", + "dependencies": { + "@csstools/css-calc": "^2.1.3", + "@csstools/css-color-parser": "^3.0.9", + "@csstools/css-parser-algorithms": "^3.0.4", + "@csstools/css-tokenizer": "^3.0.3", + "lru-cache": "^10.4.3" + } + }, + "node_modules/@asamuzakjp/css-color/node_modules/lru-cache": { + "version": "10.4.3", + "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-10.4.3.tgz", + "integrity": "sha512-JNAzZcXrCt42VGLuYz0zfAzDfAvJWW6AfYlDBQyDV5DClI2m5sAmK+OIO7s59XfsRsWHp02jAJrRadPRGTt6SQ==", + "dev": true, + "license": "ISC" + }, "node_modules/@babel/code-frame": { "version": "7.29.7", "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.29.7.tgz", @@ -260,6 +293,16 @@ "@babel/core": "^7.0.0-0" } }, + "node_modules/@babel/runtime": { + "version": "7.29.7", + "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.29.7.tgz", + "integrity": "sha512-Nq8OhGWiZIZGV6hLHoyAKLLcJihP/xFeBMGJoUrxTX2psI8dCifzLhZISFb+VWS3wFMRDmCGw5R+dOySCqPLhw==", + "dev": true, + "license": "MIT", + "engines": { + "node": ">=6.9.0" + } + }, "node_modules/@babel/template": { "version": "7.29.7", "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.29.7.tgz", @@ -318,6 +361,121 @@ "node": ">=18" } }, + "node_modules/@csstools/color-helpers": { + "version": "5.1.0", + "resolved": "https://registry.npmjs.org/@csstools/color-helpers/-/color-helpers-5.1.0.tgz", + "integrity": "sha512-S11EXWJyy0Mz5SYvRmY8nJYTFFd1LCNV+7cXyAgQtOOuzb4EsgfqDufL+9esx72/eLhsRdGZwaldu/h+E4t4BA==", + "dev": true, + "funding": [ + { + "type": "github", + "url": "https://github.com/sponsors/csstools" + }, + { + "type": "opencollective", + "url": "https://opencollective.com/csstools" + } + ], + "license": "MIT-0", + "engines": { + "node": ">=18" + } + }, + "node_modules/@csstools/css-calc": { + "version": "2.1.4", + "resolved": "https://registry.npmjs.org/@csstools/css-calc/-/css-calc-2.1.4.tgz", + "integrity": "sha512-3N8oaj+0juUw/1H3YwmDDJXCgTB1gKU6Hc/bB502u9zR0q2vd786XJH9QfrKIEgFlZmhZiq6epXl4rHqhzsIgQ==", + "dev": true, + "funding": [ + { + "type": "github", + "url": 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"sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==", + "dev": true, + "license": "MIT" + }, "node_modules/yallist": { "version": "3.1.1", "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz", diff --git a/frontend/package.json b/frontend/package.json index a730dec..435fa48 100644 --- a/frontend/package.json +++ b/frontend/package.json @@ -22,11 +22,16 @@ "devDependencies": { "@eslint/js": "^9.17.0", "@playwright/test": "1.49.1", + "@testing-library/dom": "^10.4.0", + "@testing-library/jest-dom": "^6.6.3", + "@testing-library/react": "^16.1.0", + "@testing-library/user-event": "^14.5.2", "@vitejs/plugin-react": "^4.3.4", "@vitest/coverage-v8": "^4.1.10", "eslint": "^9.17.0", "eslint-plugin-react-hooks": "^5.1.0", "globals": "^15.14.0", + "jsdom": "^26.0.0", "vite": "^6.0.7", "vitest": "^4.1.10" } diff --git a/frontend/src/components/Badge.test.jsx b/frontend/src/components/Badge.test.jsx new file mode 100644 index 0000000..6831119 --- /dev/null +++ b/frontend/src/components/Badge.test.jsx @@ -0,0 +1,28 @@ +// @vitest-environment jsdom +import { describe, it, expect } from 'vitest' +import { render, screen } from '@testing-library/react' +import Badge from './Badge.jsx' + +// 이 파일이 하는 일: Badge 컴포넌트가 "코드값 → 한국어 라벨 + 색"을 올바로 그리는지, +// 그리고 표에 없는 값이 와도 죽지 않고 안전하게 처리하는지(폴백) 검증한다. + +describe('Badge', () => { + it('알려진 상태값을 한국어 라벨로 보여준다', () => { + render() + expect(screen.getByText('통과')).toBeInTheDocument() + }) + + it('상태에 맞는 색 클래스를 붙인다', () => { + render() + const badge = screen.getByText('제출됨') + expect(badge).toHaveClass('badge', 'badge-amber') + }) + + it('변환표에 없는 값이 와도 죽지 않고 원래 값을 그대로 보여준다(폴백)', () => { + // 학습 포인트: 서버에 새 상태가 생겨도 화면이 깨지지 않아야 한다는 "방어적 기본값"을 못 박는다. + render() + const badge = screen.getByText('ALIEN_STATUS') + expect(badge).toBeInTheDocument() + expect(badge).toHaveClass('badge-primary') // 기본 색으로 대체 + }) +}) diff --git a/frontend/src/components/CodeEditor.test.jsx b/frontend/src/components/CodeEditor.test.jsx new file mode 100644 index 0000000..97d3b9b --- /dev/null +++ b/frontend/src/components/CodeEditor.test.jsx @@ -0,0 +1,65 @@ +// @vitest-environment jsdom +import { describe, it, expect, vi } from 'vitest' +import { useState } from 'react' +import { render, screen, fireEvent } from '@testing-library/react' +import userEvent from '@testing-library/user-event' +import CodeEditor from './CodeEditor.jsx' + +// 이 파일이 하는 일: 코드 에디터의 "제어된 입력", 줄번호, Tab 들여쓰기(+커서 위치 버그 수정)를 +// 실제 DOM(jsdom)에서 눌러 보며 검증한다. + +// CodeEditor는 제어 컴포넌트(value를 부모가 쥔다)라, 실제처럼 상태를 쥔 껍데기로 감싸 테스트한다. +function Harness({ initial = '', minRows }) { + const [value, setValue] = useState(initial) + return +} + +describe('CodeEditor', () => { + it('전달받은 값을 textarea에 보여준다', () => { + render( {}} />) + expect(screen.getByRole('textbox')).toHaveValue('print(1)') + }) + + it('타이핑하면 부모 상태가 갱신돼 글자가 누적된다(제어 왕복)', async () => { + const user = userEvent.setup() + render() + const textarea = screen.getByRole('textbox') + await user.type(textarea, 'hello') + expect(textarea).toHaveValue('hello') + }) + + it('줄번호는 최소 minRows개를 보장한다(빈 값이어도 창이 안 쪼그라듦)', () => { + const { container } = render( {}} minRows={5} />) + const lines = container.querySelectorAll('.code-editor__gutter > div') + expect(lines).toHaveLength(5) + }) + + it('줄 수가 minRows보다 많으면 줄 수만큼 줄번호가 늘어난다', () => { + const { container } = render( {}} minRows={2} />) + const lines = container.querySelectorAll('.code-editor__gutter > div') + expect(lines).toHaveLength(4) // 4줄 > minRows 2 + }) + + it('Tab을 누르면 브라우저 기본동작 대신 공백 2칸을 커서 위치에 끼워 넣는다', () => { + const onChange = vi.fn() + render() + const textarea = screen.getByRole('textbox') + textarea.setSelectionRange(1, 1) // 커서를 a와 b 사이에 둔다 + fireEvent.keyDown(textarea, { key: 'Tab' }) + expect(onChange).toHaveBeenCalledWith('a b') // a + 공백2 + b + }) + + it('텍스트를 선택한 채 Tab을 누르면 선택 영역이 공백 2칸으로 치환되고 커서가 그 뒤에 온다', async () => { + // 학습 포인트: 예전엔 커서를 selectionEnd+2로 잘못 계산해, 선택 후 Tab이면 커서가 밀렸다. + // 올바른 값은 selectionStart+2. 이 회귀를 못 박는 테스트다. + render() + const textarea = screen.getByRole('textbox') + textarea.setSelectionRange(1, 3) // 'bc'를 선택 + fireEvent.keyDown(textarea, { key: 'Tab' }) + expect(textarea).toHaveValue('a d') // 선택('bc')이 공백 2칸으로 치환 + + await new Promise((resolve) => requestAnimationFrame(resolve)) // 커서 이동은 다음 프레임에 + expect(textarea.selectionStart).toBe(3) // selectionStart(1) + 2 — 버그판이면 5였다 + expect(textarea.selectionEnd).toBe(3) + }) +}) diff --git a/frontend/src/components/ProgressBar.test.jsx b/frontend/src/components/ProgressBar.test.jsx new file mode 100644 index 0000000..0a0ac9e --- /dev/null +++ b/frontend/src/components/ProgressBar.test.jsx @@ -0,0 +1,30 @@ +// @vitest-environment jsdom +import { describe, it, expect } from 'vitest' +import { render, screen } from '@testing-library/react' +import ProgressBar from './ProgressBar.jsx' + +// 이 파일이 하는 일: 진행률 계산(반올림)과 0 나눗셈 방어, 막대 너비를 검증한다. + +describe('ProgressBar', () => { + it('진행률을 백분율로 계산해 표시한다', () => { + render() + expect(screen.getByText('3 / 4 (75%)')).toBeInTheDocument() + }) + + it('소수점은 반올림한다', () => { + render() // 33.33... → 33 + expect(screen.getByText('1 / 3 (33%)')).toBeInTheDocument() + }) + + it('total이 0이면 NaN이 아니라 0%를 보여준다(0 나눗셈 방어)', () => { + // 학습 포인트: total/0은 NaN이 되어 "NaN%"가 찍히는 사고 — 이 방어를 못 박는다. + render() + expect(screen.getByText('0 / 0 (0%)')).toBeInTheDocument() + }) + + it('채워진 막대의 너비가 진행률과 같다', () => { + const { container } = render() // 25% + const fill = container.querySelector('.progress-fill') + expect(fill).toHaveStyle({ width: '25%' }) + }) +}) diff --git a/frontend/src/test/setup.js b/frontend/src/test/setup.js new file mode 100644 index 0000000..aec9241 --- /dev/null +++ b/frontend/src/test/setup.js @@ -0,0 +1,15 @@ +// 이 파일이 하는 일: 컴포넌트 테스트가 시작되기 전에 한 번 실행되는 준비 코드. +// +// 학습 포인트: @testing-library/jest-dom은 "화면 요소용 단언(matcher)"을 추가한다. +// 예: expect(el).toBeInTheDocument(), toHaveClass(...), toHaveValue(...). +// 이걸 불러와 둬야 컴포넌트 테스트에서 이런 읽기 쉬운 단언들을 쓸 수 있다. +import '@testing-library/jest-dom/vitest' +import { afterEach } from 'vitest' +import { cleanup } from '@testing-library/react' + +// 학습 포인트: 각 테스트가 그린 화면을 다음 테스트로 넘기지 않도록, 매 테스트 후 DOM을 비운다. +// (vitest globals를 안 켰을 때 Testing Library의 자동 정리가 등록되지 않아 직접 걸어 준다. +// 안 하면 textarea 같은 요소가 쌓여 getByRole이 "여러 개 발견"으로 실패한다.) +afterEach(() => { + cleanup() +}) diff --git a/frontend/vite.config.js b/frontend/vite.config.js index e170d17..ac8e9c7 100644 --- a/frontend/vite.config.js +++ b/frontend/vite.config.js @@ -21,6 +21,10 @@ export default defineConfig({ // 학습 포인트: vitest는 기본으로 *.spec.js도 잡는데, e2e/의 Playwright 스펙(*.spec.js)은 // 브라우저 러너(Playwright)로만 돌아야 한다. 여기서 범위를 src로 좁혀 둘을 분리한다. include: ['src/**/*.{test,spec}.{js,jsx}'], + // 컴포넌트 테스트가 시작 전에 화면용 단언(jest-dom)을 불러오게 한다. + // 환경(jsdom vs node)은 파일 상단의 // @vitest-environment 주석으로 파일별로 정한다 + // — 순수 로직 테스트(runSql)는 node 그대로 두고, 컴포넌트 테스트만 jsdom을 쓴다. + setupFiles: ['./src/test/setup.js'], coverage: { provider: 'v8', include: ['src/lib/**'],