20 posts tagged with "stryker"

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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.

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

Webpack support is here

Nico Jansen

Nico Jansen

Stryker Team

Stryker now supports bundling your code using webpack before running your tests. The installation/upgrade scenario's in this blog post can be circumvented by using the Quickstart if you don't already use Stryker in your project.

Stryker adds Babel support

Simon de Lang

Simon de Lang

Stryker Team

A new Stryker plugin that adds support for Babel projects has just been released!

The installation/upgrade scenario's in this blog post can be circumvented by using the Quickstart if you don't already use Stryker in your project.

Road to Stryker 1.0

Nico Jansen

Nico Jansen

Stryker Team

Stryker is about two years old. During this time we achieved a lot. But it's far from finished. So, what's next? Let's take a glimpse in the future.

Stryker weekend

Simon de Lang

Simon de Lang

Stryker Team

During the last weekend of January we spent a weekend with ten students from the HAN University and University of Twente developing valuable features for Stryker!

Introduction to mutation testing

Simon de Lang

Simon de Lang

Stryker Team

Writing unit tests can be hard. Even for an easy example such as a calculator app. There are unlimited combinations of inputs for a calculator and you're not going to test every single one. So when are you done testing?

Happy new Stryker!

Nico Jansen

Nico Jansen

Stryker Team

2017 - The year to invest into test quality

Up until now, when you were writing unit tests, you were actually investing in code quality. Catching bugs early by continuously exercising your code with unit tests and keeping your stakeholders happy by presenting them with a code coverage number of 85% or higher. But does code coverage tell the entire story? Are your tests actually able to detect bugs? How do you test your tests? That's the problem mutation testing sets out to solve.