We're proud to announce the next major release of the Stryker mutation testing framework for JavaScript and friends: Stryker 4.0.

This release marks a fundamental shift in the way Stryker works internally. It now uses "mutation switching", which improves performance and usability, similar to Stryker.NET and Stryker4s already work. This change, unfortunately, couldn't be done without breaking changes. See the breaking changes paragraph if you're interested.

We're excited to announce the beta of the next major release of the Stryker mutation testing framework for JavaScript and friends: Stryker 4.0.

This beta is a huge milestone because it means a fundamental shift in the way Stryker works internally. It now uses "Mutation switching", a technique that can improve performance.

Over the past few months we have been working hard to integrate Stryker.NET with azure pipelines. Learn how you can leverage our new features to include mutation testing in your continuous integration.

Over the years, we've been privileged to explain the concept of Mutation Testing to great developers, testers and others. The concept of inserting bugs into your production code in order to test your tests sparks the imagination.

With version 3 of Stryker, we've been focussing on usability. We also did some smaller changes worth pointing out. For a full list of changes, please read our changelog.

📊 The Stryker Dashboard can now host your mutation testing report in the cloud.

A new major version of Stryker for JavaScript and TypeScript has been released: version 2.0.0. This blog post will cover some of the changes. For a full list of changes, please read our changelog.

Stryker.NET 0.10 is here! This brings new features to mutation testing for .NET. Read all about these features in this blog.

If you've used Stryker before, you'll know that it produces a gorgeous report you can view in the browser. It works by generating HTML files based on the events raised by Stryker. During development of Stryker4s and Stryker.NET, we realized that producing the same report would be a lot of work.

Instead of a new HTML reporter implementation for each Stryker framework, we've decided to move the logic of presenting the report to your browser. That way, any framework can support an HTML report simply by producing a JSON file.

We call it mutation testing elements and it is implemented using the mature web components suite of features. You can now use it in Stryker, Stryker.NET and Stryker4s

Stryker 1.0 is here! This is an important milestone for mutation testing in JavaScript and TypeScript.