I was interviewing with a company a year ago that had their own private tests on something like hackerrank. My code met the stated requirements and all of the p

I was interviewing with a company a year ago that had their own private tests on something like hackerrank. My code met the stated requirements and all of the publicly posted test cases. But, I failed a private test for which they would give me none of 1)the input 2)the expected result and 3) outpput of the program. I would have loved to have debugged it and fixed it, but said fuck it. Ifbthis is how they are in a preinterview, not a place I want to work. So, I told them to get bent when they declined to bring me on site because I couldnt pass their test. Told the recruiter what happened, and he was like "that's fucked up". Coding challenges are one thing, but you better have precise specs and actually give the candidates enough info to work on a tractable solution.