The thing I dislike about the automated tests (and this might have been an option specified by the employer maybe?) is the nature of the test isn't revealed to

The thing I dislike about the automated tests (and this might have been an option specified by the employer maybe?) is the nature of the test isn't revealed to you. I remember doing one problem for one company, and the automated test suite just gave you "5 out of 6 tests were passed", without revealing what the 6th one was testing for. I kept on having to think "maybe it's a null safety check here?", "or here?", what if the user passes -1 etc, but to no avail - the test just wouldn't pass. The worst part was I gave up in the end because I had to move onto the next question, and they don't reveal at the end your performance and where you went wrong.