React End-to-End Testing with Playwright
Test your entire application end-to-end with Playwright. Learn about efficient Playwright setup, how to test any authentication, and debug your local and remote test runs.
Teaching
I like to teach complex things in a simple way.
Workshops
Brew yourself some coffee or tea, and prepare to learn by solving real-world problems hands-on. Your own pace, my experience, our workshop.
Advanced Vitest Patterns
See how to get the most out of Vitest. From custom context and matchers, to soft assertions, polling, performance profiling, and much more.
React Component Testing with Vitest
Explore how to migrate from JSDOM to Vitest Browser Mode and rediscover updated best practices of React component testing.
Mocking Techniques in Vitest
Learn how to mock anything: from functions and globals, to date and time and the network.
Testing Fundamentals
Get started with automated testing by building your own testing framework from scratch.
Courses
A burst of knowledge. Follow along or watch at your convenience.
Mocking WebSocket APIs with Mock Service Worker
Explore WebSocket mocking by building and testing a chat application.
Mocking REST and GraphQL APIs with Mock Service Worker
Understand API mocking by building a movie streaming platform completely mock-first.