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· 3 min read
Richard Werkman

Breaking News: Stryker introduces Emoji Mutations!

In a world where even our code needs a little bit of fun, Stryker is proud to announce the introduction of Emoji Mutations. From now on, our state-of-the-art mutation testing algorithms will automatically detect all emojis in your code and replace them with their mutated counterparts!

Any code that contains an emoji will have that emoji mutated to its counterpart. For example, a happy face (😊) will be mutated to a sad face (😔), and a laughing face (😂), to a crying face (😭), or a smiling halo face (😇) will be mutated to a grumpy face (😡).

Update to the latest version of Stryker.JS, Stryker.NET or Stryker4s to enjoy this newest feature ✨

· 5 min read
Danny Berkelaar

We're excited to announce StrykerJS 6.4. This release comes with some bug fixes, but in this article, we will focus on upgraded TypeScript Checker.

As a reminder, the TypeScript checker is an optional StrykerJS plugin. When configured, each mutant will first be validated to not result in compile errors when run through the TypeScript compiler.

The performance of this process has been an issue for quite some time now. In the past, enabling this plugin might have resulted in up to a 10x performance degradation. But there is excellent news, version 6.4 of the Typescript checker improves the performance by up to 50%

· 5 min read
Richard Werkman

The new Stryker.NET is packed with a lot of new awesome features 🚀 For the past few months we've been working hard and introduced a lot of new mutators. This can have an effect on your mutation score. So don't be surprised if your score comes out a bit higher or lower after updating. Here is a short summary of everything new.

· 7 min read
Nico Jansen

We're excited to announce StrykerJS 6.2. Of course, this release comes with some bug fixes, but in this article, we want to focus on a popular new feature: incremental mutation testing.

Incremental mutation testing is ideal for Continuous Integration (CI) scenarios or if you want a faster feedback cycle locally. Indeed, many users seem to be interested in this since it was our most upvoted issue ever.

While in 'incremental mode', StrykerJS will track the changes you make to your code and tests and only runs mutation testing on the changed code; while still providing a full mutation testing report at the end!

· 3 min read
Martijn Mulders

Until recently, it would be quite cumbersome to integrate PIT with the Stryker Mutator Dashboard. It involved (mis-) using a different PIT reporter, a fragile Bash script to fiddle around in one of the generated JavaScript files... Not pretty at all.

A first-class tool like PIT deserves a better integration with a first-class dashboard like the Stryker Mutator Dashboard!

· 11 min read
Nico Jansen

We're excited to announce the next major release of the StrykerJS: StrykerJS 6.0.

StrykerJS now supports native ECMAScript modules, or ESM for short. To make this work, we changed some parts of StrykerJS, which includes small (yet technically breaking) changes. As a bonus, we've improved performance considerably in some use cases! We're curious to know what you think. Why not try it today?

· 8 min read
Nico Jansen

We're excited to announce the beta of the next major release of the StrykerJS: StrykerJS 6.0.

From the 6th version onward, StrykerJS supports native ECMAScript modules, or ESM for short. To make this work, we changed some parts of StrykerJS, which includes small (yet technically breaking) changes. As a bonus, we've improved performance considerably in some use cases! We're curious to know what you think. Why not try the beta today?