Can I use these patterns for end-to-end testing?

While focused on unit and integration tests, the skill includes architectural patterns compatible with E2E frameworks like Playwright.

Why does this skill prefer Vitest over Jest?

Vitest is preferred for its native ESM support, faster execution speeds, superior watch mode, and seamless integration with Vite-based frontend projects.

Does this skill help with test coverage?

Yes, it includes pre-defined coverage targets (90% for lines and functions) and provides configuration for v8/c8 coverage providers.

What is the recommended query priority for React components?

The skill enforces an accessibility-first approach, prioritizing getByRole and getByLabelText over non-accessible queries like getByTestId.

How does the skill handle API mocking?

It implements Mock Service Worker (MSW) to intercept network requests, allowing for realistic API simulation without mocking internal fetch or axios implementation details.

TypeScript Testing Patterns

Name: TypeScript Testing Patterns
Author: jsamuelsen11

byjsamuelsen11

0•

Security & Testing

Implements industry-standard testing practices for TypeScript projects using Vitest, React Testing Library, and Mock Service Worker.

This skill provides Claude with a comprehensive framework for writing high-quality TypeScript tests, ensuring consistency across unit, integration, and component testing. It prioritizes Vitest for its speed and native ESM support while enforcing best practices like accessibility-first querying in React Testing Library and robust API mocking with Mock Service Worker (MSW). By following these patterns, users can achieve higher test coverage, improve code reliability, and maintain a standardized testing architecture that scales with their codebase.

Key Features

01Robust API mocking strategy using Mock Service Worker (MSW)

02Advanced asynchronous testing patterns with userEvent and waitFor

03Standardized Vitest configuration and setup templates

04Standardized test file naming and descriptive test structures

05Accessibility-first React component testing patterns

060 GitHub stars

Use Cases

01Setting up a global API mocking layer to simulate backend responses in frontend tests

02Migrating a TypeScript project from Jest to Vitest for faster execution

03Implementing integration tests for complex React components with accessible queries

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jsamuelsen11/claude-config testing-patterns

For use in Claude.ai and ChatGPT

Download Skill