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Provides practical testing strategies and patterns for React, Next.js, and NestJS projects, covering unit, integration, and E2E testing plus test organization a
This skill adds a comprehensive testing playbook for fullstack JavaScript/TypeScript projects. It provides concrete guidance on unit, integration, and end-to-end (E2E) testing, recommended tooling (Jest/Vitest, React Testing Library, Supertest, Playwright/Cypress), coverage targets, and test organization patterns. It also outlines practical examples and code snippets for arranging Arrange-Act-Assert tests and maintaining test hygiene.
Use this skill when you need to: set up or review test strategy for React/Next.js/NestJS apps; write unit or integration tests; design E2E flows; audit test coverage and quality; or establish test infrastructure and mocking conventions. Triggers include tasks like "write tests", "improve coverage", "setup E2E", or "audit test suite".
references/full-guide.md with examples.Best suited for code-focused assistants that can author/tests and read repos (Codex, Claude Code, Cursor, Copilot).
Testing Expert is a purely instructional skill with no scripts — it provides testing strategy guidance for React, Next.js, and NestJS projects. SKILL.md is well-organized with clear triggers, coverage targets, and the AAA testing pattern. However, it delegates all concrete examples to a references/full-guide.md file, making the standalone SKILL.md somewhat thin. No security concerns whatsoever — no scripts, no network calls, no credentials.
Clean skill with no security issues. Main limitation is that the SKILL.md acts as an overview pointing to references/full-guide.md for complete examples — the skill is less useful standalone. Testing advice is solid but not uniquely valuable given abundance of similar guides.
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