Thanks! Most likely not yet applicable at Google's scale but smaller project can defo leverage the approach. Personally, I'm writing most of my tests this way and with TDD the red phase is always a compilation fail which is quicker than buiding and running in my experience. But that's for a medium size project. But as always it depends there are trade offs.
I’ve been using this technique as well, but I found that debugging static_asserts is quite hard. I often fall back to calling the failing test at runtime and stepping through. Any suggestions for a different workflow?
IMHO the best approach is to avoid the problem by applying TDD. Then there is very little need to debug anything. But otherwise, there is https://github.com/mikael-s-persson/templight for compile-time debugging which is pretty cool and having something like `expect(auto... args) static_asert(args...); assert(args...);` may help with being able to debug at run-time and get the coverage (though, the code has has to compile aka pass first).