How to measure the quality of unit tests? Code coverage is not necessarily a good indicator to answer this question. What other options do we have? Do we need tests to test the quality of our tests? In some way, yes we do. In this session, I will introduce you to the concept of mutation-based testing and how this technique can be used to improve the quality of your test suite.


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Some interesting ideas and generally a smooth talk. Drifted off into details towards the end.

Wouter at 18:37 on 24 Jan 2020

Good and interesting talk. Will get into this further. Thx!
Maybe it would be a good idea to add some more examples.

This is something I want to try on my projects. So: 5 stars.

Great talk which shows the basics of mutation testing.

Good talk. Good examples, I'm definately going to try this.

Daan at 09:44 on 26 Jan 2020

Good talk with clear examples and a nice bit of humour sprinkled in. Would definitely like to attend more of talks by Stephan.

Patrick Blom at 09:52 on 26 Jan 2020

Very good talk with understandable examples and a nice explanations about the metrics. The concept behind became clear. Thx for the talk!

Timo Schinkel at 20:49 on 1 Feb 2020

Great talk with great insights into mutation testing.

I had never heard of mutation testing before, and am now trying it out. So for me, your talk definitely had things to take away from the conference and use directly, which I think is a huge plus.

It was well explained and structured, and it made a quite convincing argument.

Thank you.