The tweet links to a couple of tutorials showing how to test an extremely simple CRUD service using Coyote to find concurrency bugs. Developers write simple unit tests whose concurrency is explored by Coyote to find bugs. You might be surprised to learn how we can write a number of interesting concurrency tests for even the simplest of CRUD services.
https://microsoft.github.io/coyote/#tutorials/first-concurre... https://microsoft.github.io/coyote/#tutorials/test-concurren...