Frontend Testing Specialist

About

This skill provides specialized guidance for writing high-confidence frontend tests based on the DOM Testing Library philosophy of testing behavior over implementation. It helps developers avoid common pitfalls like false negatives during refactors by focusing on how end-users interact with the DOM. The skill includes deep-dives into query prioritization, realistic user simulations with userEvent, complex asynchronous testing patterns, and network-level API mocking using MSW (Mock Service Worker), all while maintaining an accessibility-first approach.

Key Features

• Behavior-first testing patterns to ensure tests survive code refactors
• 14 GitHub stars
• Robust asynchronous testing strategies for loading states and API calls
• Priority-based query selection focusing on accessibility and ARIA roles
• Realistic user interaction modeling using the userEvent library
• Comprehensive API mocking patterns using Mock Service Worker (MSW)

Use Cases

• Writing integration tests for complex UI components that mirror real user behavior
• Refactoring frontend logic without breaking existing test suites
• Implementing accessibility-first testing to improve both code quality and UX