local id = 0
while not GetItemInfoInstant(id) do
   id = math.random(1, 200000)
end

local frame = _G.TestGetItemInfo or CreateFrame("Frame", "TestGetItemInfo")
frame:RegisterEvent("GET_ITEM_INFO_RECEIVED")
frame:SetScript("OnEvent", function(self, event, id)
      print(GetTime(), event, id)
      print("-----")
end)

DEFAULT_CHAT_FRAME:AddMessage(GetTime().." requestinfo  "..id.."  "..tostring(GetItemInfo(id) or ""))