What? Khordad HIMAD shot RQ-4, Iranian Jammer/e-warfare units brought down the RQ-170, Iranian made ADs have downed 4th gen fighters jets in Yemen-KSA theatre and they were not even proper SAM batteries, more than a dozen of Reapers/Predators/Hermes UCAVs have been brought down in all theatres where Iranian militias were armed with just rudimentary Air-defence assets. It's safe to say that IADS's of Iran, Israel, and Russia are probably the most battle-hardened in the entire world because of the elongated conflicts these countries are involved in.
Iranian IADS is the most dense layered unit in the entire MENA region along with Israel itself. No other country in MENA has network of OTH search assets plugged to Active-Passive trackers that can search/track fighters/UCAVs/Conventional BM/CM 1000+/400 KM away and then send this real time data to layers of SHORADS/HIMADS. Offcourse this IADS currently can not stop HGVs or ALBMs but who can? Did not Israeli IADS itself fail massively against Iranian Hypersonics/Skip glide vehicles three weeks ago when 100+ Re-entry vehicles went pass through the entire ABM shield?
If we go by your theory of weapons not being tested than same can be said about roughly 90% of the western weaponry too.