Adds missing Wind Rider activation and tests (#5207)

* Adds missing Wind Rider activation + tests

* Adds test for opponent setting up Tailwind

* Update src/battle_util.c

Co-authored-by: Alex <93446519+AlexOn1ine@users.noreply.github.com>

---------

Co-authored-by: Alex <93446519+AlexOn1ine@users.noreply.github.com>

src/battle_util.c

@@ -4766,6 +4766,19 @@ u32 AbilityBattleEffects(u32 caseID, u32 battler, u32 ability, u32 special, u32
                 effect++;
             }
             break;
+        case ABILITY_WIND_RIDER:
+            if (!gSpecialStatuses[battler].switchInAbilityDone 
+             && CompareStat(battler, STAT_ATK, MAX_STAT_STAGE, CMP_LESS_THAN)
+             && gSideStatuses[GetBattlerSide(battler)] & SIDE_STATUS_TAILWIND)
+            {
+                gBattleScripting.savedBattler = gBattlerAttacker;
+                gBattlerAttacker = battler;
+                gSpecialStatuses[battler].switchInAbilityDone = TRUE;
+                SET_STATCHANGER(STAT_ATK, 1, FALSE);
+                BattleScriptPushCursorAndCallback(BattleScript_BattlerAbilityStatRaiseOnSwitchIn);
+                effect++;
+            }
+            break;
         case ABILITY_DESOLATE_LAND:
             if (TryChangeBattleWeather(battler, ENUM_WEATHER_SUN_PRIMAL, TRUE))
             {

test/battle/ability/wind_rider.c

@@ -0,0 +1,127 @@
+#include "global.h"
+#include "test/battle.h"
+
+ASSUMPTIONS
+{
+    ASSUME(gMovesInfo[MOVE_TAILWIND].effect == EFFECT_TAILWIND);
+    ASSUME(gMovesInfo[MOVE_TAILWIND].windMove == TRUE);
+}
+
+SINGLE_BATTLE_TEST("Wind Rider raises Attack by one stage if it sets up Tailwind")
+{
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_BRAMBLIN) { Ability(ABILITY_WIND_RIDER); }
+    } WHEN {
+        TURN { MOVE(opponent, MOVE_TAILWIND); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_TAILWIND, opponent);
+        ABILITY_POPUP(opponent, ABILITY_WIND_RIDER);
+        ANIMATION(ANIM_TYPE_GENERAL, B_ANIM_STATS_CHANGE, opponent);
+        MESSAGE("Foe Bramblin's Attack rose!");
+    } THEN {
+        EXPECT_EQ(opponent->statStages[STAT_ATK], DEFAULT_STAT_STAGE + 1);
+    }
+}
+
+DOUBLE_BATTLE_TEST("Wind Rider raises Attack by one stage if Tailwind is setup by its partner")
+{
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET);
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_BRAMBLIN) { Ability(ABILITY_WIND_RIDER); }
+    } WHEN {
+        TURN { MOVE(opponentLeft, MOVE_TAILWIND); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_TAILWIND, opponentLeft);
+        ABILITY_POPUP(opponentRight, ABILITY_WIND_RIDER);
+        ANIMATION(ANIM_TYPE_GENERAL, B_ANIM_STATS_CHANGE, opponentRight);
+        MESSAGE("Foe Bramblin's Attack rose!");
+    } THEN {
+        EXPECT_EQ(opponentRight->statStages[STAT_ATK], DEFAULT_STAT_STAGE + 1);
+    }
+}
+
+SINGLE_BATTLE_TEST("Wind Rider doesn't raise Attack if opponent sets up Tailwind")
+{
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_BRAMBLIN) { Ability(ABILITY_WIND_RIDER); }
+    } WHEN {
+        TURN { MOVE(player, MOVE_TAILWIND); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_TAILWIND, player);
+        NONE_OF {
+            ABILITY_POPUP(opponent, ABILITY_WIND_RIDER);
+            ANIMATION(ANIM_TYPE_GENERAL, B_ANIM_STATS_CHANGE, opponent);
+            MESSAGE("Foe Bramblin's Attack rose!");
+        }
+    } THEN {
+        EXPECT_EQ(opponent->statStages[STAT_ATK], DEFAULT_STAT_STAGE);
+    }
+}
+
+SINGLE_BATTLE_TEST("Wind Rider raises Attack by one stage if switched into Tailwind on its side of the field")
+{
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_WYNAUT);
+        OPPONENT(SPECIES_BRAMBLIN) { Ability(ABILITY_WIND_RIDER); }
+    } WHEN {
+        TURN { MOVE(opponent, MOVE_TAILWIND); }
+        TURN { SWITCH(opponent, 1); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_TAILWIND, opponent);
+        ABILITY_POPUP(opponent, ABILITY_WIND_RIDER);
+        ANIMATION(ANIM_TYPE_GENERAL, B_ANIM_STATS_CHANGE, opponent);
+        MESSAGE("Foe Bramblin's Wind Rider raised its Attack!");
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_CELEBRATE, player);
+    } THEN {
+        EXPECT_EQ(opponent->statStages[STAT_ATK], DEFAULT_STAT_STAGE + 1);
+    }
+}
+
+SINGLE_BATTLE_TEST("Wind Rider activates when it's no longer effected by Neutralizing Gas")
+{
+    GIVEN {
+        PLAYER(SPECIES_WEEZING) { Ability(ABILITY_NEUTRALIZING_GAS); }
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_BRAMBLIN) { Ability(ABILITY_WIND_RIDER); }
+    } WHEN {
+        TURN { MOVE(opponent, MOVE_TAILWIND); }
+        TURN { SWITCH(player, 1); }
+    } SCENE {
+        ABILITY_POPUP(player, ABILITY_NEUTRALIZING_GAS);
+        MESSAGE("Neutralizing Gas filled the area!");
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_TAILWIND, opponent);
+        SWITCH_OUT_MESSAGE("Weezing");
+        MESSAGE("The effects of Neutralizing Gas wore off!");
+        ABILITY_POPUP(opponent, ABILITY_WIND_RIDER);
+        ANIMATION(ANIM_TYPE_GENERAL, B_ANIM_STATS_CHANGE, opponent);
+        MESSAGE("Foe Bramblin's Wind Rider raised its Attack!");
+    } THEN {
+        EXPECT_EQ(opponent->statStages[STAT_ATK], DEFAULT_STAT_STAGE + 1);
+    }
+}
+
+SINGLE_BATTLE_TEST("Wind Rider absorbs Wind moves and raises Attack by one stage")
+{
+    ASSUME(gMovesInfo[MOVE_GUST].windMove == TRUE);
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_BRAMBLIN) { Ability(ABILITY_WIND_RIDER); }
+    } WHEN {
+        TURN { MOVE(player, MOVE_GUST); }
+    } SCENE {
+        NONE_OF {
+            ANIMATION(ANIM_TYPE_MOVE, MOVE_GUST, player);
+            HP_BAR(opponent);
+        }
+        ABILITY_POPUP(opponent, ABILITY_WIND_RIDER);
+        ANIMATION(ANIM_TYPE_GENERAL, B_ANIM_STATS_CHANGE, opponent);
+        MESSAGE("Foe Bramblin's Attack rose!");
+    } THEN {
+        EXPECT_EQ(opponent->statStages[STAT_ATK], DEFAULT_STAT_STAGE + 1);
+    }
+}