Gen7Data/Scripts/Moves/ChangeTargetDef.as

namespace Gen7 {
    [Move effect=ChangeTargetDef]
    shared class ChangeTargetDefense : PkmnScript{
        int8 _amount;

        void OnInitialize(const narray<EffectParameter@>@ parameters) override{
            _amount = int8(parameters[0].AsInt());
        }

        void OnSecondaryEffect(ExecutingMove@ attack, Pokemon@ target, uint8 hit) override{
            target.ChangeStatBoost(Statistic::Defense, _amount);
        }
    }
}

#if TESTS
void TestChangeDefenseStat(int8 amount){
    auto battle = CreateSimpleBattle(684, "charizard", "venusaur", 100);
    auto mon1 = battle.GetBattleSide(0).GetPokemon(0);

    auto script = cast<Gen7::ChangeTargetDefense>(CreateMoveScript("ChangeTargetDef"));
    auto executingMove = CreateExecutingMove("Tackle", mon1, mon1);
    script._amount = amount;
    script.OnSecondaryEffect(executingMove, mon1, 0x0);
    RequireEquals(amount, mon1.GetStatBoost(Statistic::Defense));
}

[Test name="ChangeTargetDefense: Does as the name suggests"]
void ChangeTargetDefense_Test(){
    for (int8 i = -6; i <= 6; i++){
        TestChangeDefenseStat(i);
    }
}

#endif