I generaly only flextest if I see a blemish on the arrow that is not obviously ruined.
I'm glad you posted this because it reminded me to share and experiance with you. My wife has been shooting Gold Tips with camo wrap on them. I noticed a spot where the camo was worn through so you could see the carbon, however it didn't appear to be damaged. I flexed it once, twice, then rotated it 180* and it snapped with the third flex and I didn't have to bare down on it too hard. It really surprised me. So yes inspect your arrows and if you see a blemish give the flex test, rotating the arrow.