🤝 Open source advocate 👽 Maintainer of @stryker_mutator 💼 Manager and trainer @InfoSupportBV 💚 Loves green energy and vegetables

Holland and Belgium
🤦‍♂️so in order to hide your shadowRoot, you create it with { mode: 'closed' }. But wait! How to get to that shadowRoot? Meet openOrClosedShadowRoot. Problem solved. Now we just need a way to hide that 🤔 developer.mozilla.org/en-US/…
Stryker now supports .NET Full framework! Congrats to @RichardWerkman @roukebroersma and @_dupdob_ for all their hard work! Awesome job.
Stryker.NET v0.10 release is here! Supporting #dotnetframework as well as #dotnet core for the first time! Bringing #MutationTesting to *all* #Csharp projects! Read all about it in our latest blog article stryker-mutator.io/blog/2019…
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Our new #HTML reporter is implemented as a Single Page Application using native #webcomponents. Interested? Why not have a look. Coming (or is already there) to a #MutationTesting framework near you!
Introducing mutation-testing-elements. The new mutation testing report that's used across all Stryker implementations. Read all about it in our latest blog article: stryker-mutator.io/blog/2019…
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My latest #StrykerMutator PR implements the HTML report as a single page application using mutation-testing-elements. Did I mention I love deleting code? 😍 github.com/stryker-mutator/m…
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Nico Jansen retweeted
Last thursday the students of @ucleuvenlimburg learned about "default choices" in our industry. They discovered that JSON, REST, SQL and Lat/Long are GREAT but they are NOT silver bullets. Think, examine and experiment before you choose a fundamental part of your system!
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Another list of great features coming to #TypeScript. My personal favorite? const assertions. For sure. It will help cleanup code nicely 😍 devblogs.microsoft.com/types…
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I'm pretty impressed by the teamwork of the Edge and Chrome teams here. I think politicians could learn from it. mspoweruser.com/microsoft-br…
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This is why you need mutation testing. Glad #StrykerMutator has my back. Guess I need some more tests 😎. Came across this file while creating our new web components based html reporter. Validating the tests with our previous html reporter 🤯
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Nico Jansen retweeted
Today's innovation day mission complete. Setup mutation testing in our ci pipeline using @docker and github.com/stryker-mutator/s… #mutationtesting #dotnetcore #stryker
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Nico Jansen retweeted
Swedish activists Greta Thunberg and Anuna De Wever led Belgian student demonstration this morning against climate change. #YouthForClimate
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I'm very excited to submit a talk to @nodejsconfnl! It's about #MutationTesting using @stryker_mutator... what else did you expect? 😅
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Nico Jansen retweeted
TIL about mutation testing. An interesting way to find gaps in your test coverage. Example: Stryker. It changes your code. If your tests still pass, that's a problem. stryker-mutator.io/
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Nico Jansen retweeted
From TSLint to ESLint and beyond, learn how we're contributing to the future of TypeScript in the Web development ecosystem: bit.ly/2BKTib0
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Our latest improvement for #StrykerMutator will be a 100% web components implementation of the html reporter. Making it compatible with Stryker4s, Stryker.NET, Stryker and our mutation testing dashboard. Awesome! Follow progress here: github.com/stryker-mutator/m…
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Wtf! I'm famous! Who can say they have an actual npm package named after them? 😍 Who can explain to me what it does? npmjs.com/package/nicojs
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Nico Jansen retweeted
Replying to @_simondel
Hey, yes I do. Actually few months ago I have introduced #Stryker at Dazn. At the moment a couple of teams are using it to validate their tests. It’s really useful. Thank you for it
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Nico Jansen retweeted
Today we're introducing Draft pull requests – tag your work-in-progress PRs as Draft to signal to your teammates that you're not ready to merge them yet. github.blog/2019-02-14-intro…
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😍 Finally we've managed to release 1.0. No new features, just removed a whole bunch of old stuff.
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