There are tests, they're mainly just out of tree, focused on integration rather than unit, and very decentralized. You'll get nastygrams on lkml if you break t

There are tests, they're mainly just out of tree, focused on integration rather than unit, and very decentralized. You'll get nastygrams on lkml if you break them. Here's one prominent example: https://github.com/linux-test-project/ltp https://github.com/linux-test-project/ltp