Unit testing on "react + react-route" stack

I've read many recommendations of how it's possible to render routed via react-router components, but I still can't to make it work. I tried to find it using github codebase search, still no luck. And at this point all I need is one working example.

Here is my boilerplate project, but maybe it's not important. I just want to see some react-route unit-testing working example.