The C++ golden testing framework will detect if you delete the golden file as the test will start to fail, but the opposite is not true - you have no indication that you've deleted a test and failed to delete the corresponding golden file. This came up in a recent PR.

It would be nice to have some kind of linter warning or test failure informing developers of this situation.

Aside: this might be easier to achieve in the bazel world if we make the golden file an input to the test target.