Well, I have mentioned before my only knowledge of TKD is when I studied in the mid-60s, and sitting in on a couple of tests in the mid-90s. I am accustomed to a little different ways. The student would not normally be encouraged to take a test if the teacher felt they were not ready. Some people think that is a poor way of doing things, let the student decide and take the consequences.
I think it is a poor way to do things otherwise. Why encourage a student to fail? Considering that especially for BB tests, there is normally a panel of other master or grand masters, why put up a student who cannot pass, and to the embarrassment of the teacher and school who submits the student to testing? Better to tell a student why they aren't ready, and show them what they need to improve and work with them to improve, than have them pay fees, psych themselves up, and fail. It was the way I learned in TKD and in the Hapkido I studied later. I cannot understand a schools teacher not being told why someone failed, and that should be done quickly. To me, it seems an insult to do otherwise. But I guess part of that is from the perspective that a student should not be tested until the teacher is confident they are ready to pass a test.
I understand not every one or school agrees with that, and that is OK. That is their way and they are entitled to it.