UnitDamageTarget-VS-Spell Immunity

When you use the UnitDamageTarget function with DamageType=AttackType=WeaponType=null, does it still reduces the damage by 33% if you have Runed Bracers item?
If not how can I make this happen? Do I need to define all the conditions of spell immunity (like unit has item, unit has ability...)?

No, because the damage isn't spell damage. If you want to make it affected by spell immunity/resistance just change the damage type to magic. Why do you have the damage type set to null if you don't want it to bypass spell resistance?

Cause when I set it to magic, it doesn't deal full damage. I think it also counts armor. Or am I seeing things, could be...

If you use UnitDamageTarget is because you want to take into account the armor, damage and weapon type. So if you set it as a magic damage, Runed bracers should be working.

I see. Well, thanks to the both of you.