Testing • Topic Section2 scenarios

TDD & Component Testing

Red-Green-Refactor cycle, Vitest 4, React Testing Library, and ARIA roles

UI reliability through testing: writing failing test specs first, user behavior emulation with @testing-library/user-event, and API mocking with MSW.

Vitest 4TDDReact Testing Libraryuser-event v14MSW v2

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+100 XP~70 min

AI Technical InterviewPractice Senior interview questions

Interactive Lab Outage SimulatorHands-on debugging and incident response

Engineering RoadmapTrack mastery milestones

Practical Section Scenarios

2 scenarios available

Difficulty level:

Middle35 min+50 XP

TDD in React 19: Step-by-Step Red-Green-Refactor Cycle, Vitest 4, and RTL

Сквозная инженерная методология Test-Driven Development (TDD) в React 19: проектирование контракта интерфейса через падающие тесты (Red), быстрая реализация (Green), рефакторинг архитектуры по ролям WAI-ARIA и мокирование с MSW.

React 19Vitest 4React Testing Libraryuser-event v14TypeScript

Production ScenarioOpen workflow

Junior35 min+50 XP

Component Testing from Scratch: Vitest 4, React Testing Library, and MSW v2 Network Mocking

Практическое руководство по созданию надежной среды автоматизированного тестирования фронтенда с нуля: настройка Vitest 4 с легковесным DOM (happy-dom), философия доступности React Testing Library (getByRole), перехват сетевых запросов на уровне сокетов с Mock Service Worker (MSW 2.x) и эмуляция взаимодействия пользователя с user-event.

Vitest 4@testing-library/react@testing-library/user-eventmsw 2.xhappy-dom

Production ScenarioOpen workflow

Other sections in Testing

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2 scenarios

E2E Automation & CI/CD Gates

Playwright 2026, Page Object Model, Storage State, and Test Sharding

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