Can it fix failing tests?

Yes, the skill is designed to analyze failing tests, identify if the failure is due to a bug or a brittle test pattern, and provide a fix aligned with industry best practices.

What is property-based testing in this context?

It uses the fast-check library to automatically generate a wide range of inputs for your functions, ensuring that specific 'properties' or invariants remain true regardless of the data.

How does it handle API mocking?

It follows MSW (Mock Service Worker) v2 best practices, using the http and HttpResponse APIs to intercept network requests at the network level rather than mocking fetch manually.

Does this skill support Next.js Server Components?

Yes, it provides specific guidance for testing Server Components, recommending Playwright for async components that Vitest cannot yet handle natively.

TypeScript Test Engineer

Name: TypeScript Test Engineer
Author: peterstorm

bypeterstorm

0•

Seguridad y Pruebas

Provides expert guidance for writing, debugging, and optimizing TypeScript and Next.js test suites using Vitest, Playwright, and property-based testing.

The TypeScript Test Engineer skill transforms Claude into a specialized QA expert for modern web development. It offers deep domain knowledge in the TypeScript ecosystem, focusing on the test pyramid—balancing unit, integration, and E2E tests. The skill excels at implementing property-based testing with fast-check to catch edge cases, mocking APIs with MSW v2, and testing complex React components or Next.js App Router features. It ensures your test suite is resilient, fast, and focuses on user behavior rather than implementation details, helping developers maintain high-quality codebases with fewer regressions.

Características Principales

010 GitHub stars

02End-to-end testing strategies for Next.js and Server Components via Playwright

03Identification and correction of testing anti-patterns like state-testing and brittle snapshots

04Modern API mocking and integration testing with MSW v2

05Expert implementation for Vitest and React Testing Library (RTL)

06Automated property-based testing patterns using fast-check for edge case detection

Casos de Uso

01Developing robust integration tests for React components and Next.js App Router flows

02Refactoring brittle test suites to focus on user behavior and accessible queries

03Increasing test coverage for complex TypeScript utility functions and parsers using invariants

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add peterstorm/.dotfiles ts-test-engineer

For use in Claude.ai and ChatGPT

Download Skill