Announcing Stryker 4.0 - Mutation Switching

Nico Jansen

Nico Jansen

Stryker Team

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.

Announcing Stryker 4.0 Beta

Nico Jansen

Nico Jansen

Stryker Team

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.

Announcing Stryker 100% mode

Nico Jansen

Nico Jansen

Stryker Team

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.

One mutation testing HTML report

Nico Jansen

Nico Jansen

Stryker Team

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