I have a job interview coming up that I hope will go well and don't know whether to mention to my current line manager or not. Googling says it's a big no no - no guarantee I'll get the job and could make things awkward as they'll know I'm looking to move on. However, a colleague who left last year handed in her notice and our manager was most upset that she hadn't informed her she was going for the interview in the first place so her notice coming in was a complete shock. I remember all the drama well so wonder if I'm better to let her know I have the interview - I need to book a days leave for it anyway so she may ask what I'm up to and I don't want to lie. We get on well and consider each other as friends which is nice but also makes it difficult when it comes to this kind of situation.
Does anyone have any advice?