Jest vs Vitest
2026년 올바른 도구 선택을 위한 상세 비교
🏆 빠른 결론
승자: Vitest
Vitest is the recommended choice for new projects, especially those using Vite. It's faster, has native ESM/TypeScript support, and offers a Jest-compatible API for easy migration. Jest remains solid for existing projects.
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📊 Visual Comparison
전체 점수 비교
카테고리별 분석
Jest 하이라이트
- ✅ Industry standard with massive adoption
- ✅ Zero-config for most projects
- 💰 Free
Vitest 하이라이트
- ✅ Blazing fast execution with Vite
- ✅ Native ESM and TypeScript support
- 💰 Free
기능 비교
| Feature | Jest | Vitest |
|---|---|---|
| Configuration | Zero-config or jest.config | vitest.config or vite.config |
| Watch Mode | ✓ | Smart with HMR |
| Mocking | Built-in jest.mock() | Built-in vi.mock() |
| Code Coverage | Built-in (Istanbul) | Built-in (v8 or Istanbul) |
| Snapshot Testing | Built-in | Built-in |
| Parallel Execution | Worker-based | Worker threads |
| TypeScript | Via ts-jest or @swc/jest | Native (via Vite) |
| ESM Support | Experimental | Native |
| Browser Testing | Via jsdom | Vitest Browser Mode |
| IDE Integration | Excellent | Good (VS Code extension) |
Jest란?
Jest is the most popular JavaScript testing framework, created by Facebook. It provides a zero-config testing experience with built-in mocking, code coverage, and snapshot testing.
✅장점
- •Industry standard with massive adoption
- •Zero-config for most projects
- •Built-in mocking and assertions
- •Snapshot testing
- •Great IDE integration
- •Huge community and ecosystem
❌단점
- •Slow for large test suites
- •ESM support still evolving
- •Heavy dependency footprint
- •Configuration can become complex
- •Watch mode less responsive than Vitest
- •Not optimized for Vite/modern tooling
Vitest란?
Vitest is a blazing-fast unit testing framework powered by Vite. It offers Jest-compatible APIs with native ESM support, TypeScript integration, and significantly faster execution.
✅장점
- •Blazing fast execution with Vite
- •Native ESM and TypeScript support
- •Jest-compatible API (easy migration)
- •Excellent watch mode with HMR
- •Built-in UI for test visualization
- •First-class Vite integration
❌단점
- •Smaller community than Jest
- •Newer with less battle-testing
- •Some Jest plugins not compatible
- •Best experience requires Vite
- •Less IDE integration than Jest
- •Ecosystem still growing
가격 비교
📊심층 분석: Jest vs Vitest
Jest와 Vitest 중에서 선택하는 것은 두 도구 모두 현대적인 워크플로우에 매력적인 기능을 제공하기 때문에 어려울 수 있습니다. 이 종합 비교에서는 기능과 가격부터 실제 사용 사례까지 모든 측면을 분석하여 정보에 입각한 결정을 내리는 데 도움을 드립니다.
Jest
Jest is the most popular JavaScript testing framework, created by Facebook. It provides a zero-config testing experience with built-in mocking, code coverage, and snapshot testing.
Vitest
Vitest is a blazing-fast unit testing framework powered by Vite. It offers Jest-compatible APIs with native ESM support, TypeScript integration, and significantly faster execution.
🎯최적의 사용 사례
Jest을 선택해야 할 때
- ✓팀을 위해:
Industry standard with massive adoption
- ✓중소기업을 위해:
Zero-config for most projects
- ✓대기업을 위해:
Built-in mocking and assertions
Vitest을 선택해야 할 때
- ✓개인을 위해:
Blazing fast execution with Vite
- ✓중소기업을 위해:
Native ESM and TypeScript support
- ✓팀을 위해:
Jest-compatible API (easy migration)
🔍기능 심층 분석
Configuration
Watch Mode
Mocking
Code Coverage
Snapshot Testing
Parallel Execution
💰가격 분석
Jest
Open source
✅ 무료 플랜 제공Vitest
Open source
✅ 무료 플랜 제공💡 Pro Tip
두 도구 모두 무료 체험 또는 무료 플랜을 제공합니다. 유료 플랜에 가입하기 전에 실제 워크플로우에서 두 도구를 모두 테스트해보시기 바랍니다.
🏆우리의 추천
광범위한 분석과 테스트 후, 우리의 결론은 다음과 같습니다: Jest와 Vitest 모두 생산성을 크게 향상시킬 수 있는 훌륭한 도구입니다. 최선의 선택은 여러분의 구체적인 요구 사항, 워크플로우, 우선순위에 따라 달라집니다.
Jest을 선택하세요:
You have a large existing Jest test suite, need maximum ecosystem compatibility, or your project doesn't use Vite.
Vitest을 선택하세요:
You're starting a new project, use Vite, want faster test execution, or need native ESM and TypeScript support.
자주 묻는 질문
Very easy. Vitest is designed to be Jest-compatible. Most tests work with minimal changes — mainly replacing 'jest' with 'vi' in mock calls.
최종 결론: 무엇을 선택해야 할까요?
✨ Jest을 선택하세요, 만약
You have a large existing Jest test suite, need maximum ecosystem compatibility, or your project doesn't use Vite.
✨ Vitest을 선택하세요, 만약
You're starting a new project, use Vite, want faster test execution, or need native ESM and TypeScript support.