You write unit tests in your team? Of course you do! But are those tests sufficient? Coverage tools provide an answer.
Unfortunately, coverage analysis is often insufficient. Even test suites with 100% code coverage often miss bugs. Some test suites bring only little added value in practice.

With Mutation Testing you can check the quality of your tests yourself! Stryker (JS/TS, C#, Scala) puts your tests to the test. You get a more realistic statement, how well your suite can actually find errors and learn how to improve it. The tool integrates into your project and pipeline with little effort and gets results fast!

Learning Objectives:

• Understand why 100% coverage means little
• Integrate Stryker into your own projects
• Improve test suites with the help of mutation reports

Marco is an architect and consultant at codecentric, and a passionate advocate for software craft & quality, which he also teaches at the university of applied sciences in Salzburg. He regularly speaks at software engineering conferences and is the author of several technical books. When he's not buried deep in code, his children beat him in analog board games.