About Sveltest

Built for Teams, Battle-Tested in Production

Sveltest began as a simple weekend project - just a collection of testing examples to accompany my blog post about migrating from @testing-library/svelte to vitest-browser-svelte. But like the best side projects, it took on a life of its own.

From Weekend Project to Production Patterns

What started as basic examples quickly evolved into something much more comprehensive. As I refined these testing approaches with my team on a large monorepo, the patterns became more sophisticated, more battle-tested, and more valuable to share with the broader community.

We’re operating at the bleeding edge of Svelte 5 testing - using vitest-browser-svelte in real production environments, discovering edge cases, and developing patterns that actually work when you scale them up. These aren’t theoretical examples; they’re patterns we use every day to ship reliable software.

The Client-Server Alignment Strategy emerged from real production pain points where heavily mocked tests passed but production failed due to client-server contract mismatches. This approach ensures your tests catch the integration issues that matter.

A Living Documentation Project

Every component, every test, every pattern in Sveltest serves as a working example. The beautiful site you’re browsing? That’s just a delightful side effect of building comprehensive testing examples. The real value is in the code itself - patterns you can copy, adapt, and use in your own projects.

Empowering Teams with AI

One of the most exciting outcomes has been creating comprehensive AI assistant rules that help entire teams adopt these testing methodologies. Whether you’re using Cursor, Windsurf, or other AI-powered editors, these rules ensure consistent, high-quality testing patterns across your team.

Community-Driven Development

Sveltest is more than just a personal project - it’s a community resource built by developers, for developers. The patterns, examples, and documentation you see here represent collective wisdom from teams working with Svelte 5 and modern testing tools in production environments.

Open Source & Collaborative

The entire project is open source on GitHub, where you can:

Contribute new testing patterns from your own projects
Report issues or suggest improvements
Share knowledge through discussions and examples
Help improve documentation for the community

Every contribution, whether it’s a bug report, a new testing example, or documentation improvement, makes the resource better for everyone in the Svelte ecosystem.

Your Testing Patterns Matter

Have you discovered a testing pattern that works well in your project? Found a better way to test a specific Svelte 5 feature? Encountered an edge case that others should know about? Your experience can help other developers.

The best testing resources come from real-world usage, and every team brings unique challenges and solutions. By sharing your patterns and contributing to the project, you help build the most comprehensive Svelte testing resource available.

The Svelte ecosystem deserves modern, production-ready testing patterns. Too many teams struggle with testing because the examples they find are either too simple for real-world use or too complex to understand. Sveltest bridges that gap.

Every bug we catch in production, every edge case we handle, every pattern we refine - it all makes its way back into these examples. This isn’t just documentation; it’s a living repository of testing wisdom that evolves with real-world usage.

Built for the Community

Whether you’re a solo developer learning testing patterns, a team lead establishing standards, or an engineering manager looking for proven approaches, Sveltest provides the examples and patterns you need.

The code speaks for itself, the tests prove the patterns work, and the AI rules help your team maintain consistency. This is testing documentation for the modern web development era.

Sveltest represents the testing patterns and approaches I wish had existed when I started my Svelte testing journey. Now they’re here for you - and with your contributions, they can be even better for the next developer.

Ready to contribute? Visit the GitHub repository to get started.