Tests for Body Press + body press interaction with Wonder room (#4792)

src/battle_util.c

@@ -9218,7 +9218,11 @@ static inline u32 CalcAttackStat(u32 move, u32 battlerAtk, u32 battlerDef, u32 m
     else if (gMovesInfo[move].effect == EFFECT_BODY_PRESS)
     {
         atkStat = gBattleMons[battlerAtk].defense;
-        atkStage = gBattleMons[battlerAtk].statStages[STAT_DEF];
+        // Edge case: Body Press used during Wonder Room. For some reason, it still uses Defense over Sp.Def, but uses Sp.Def stat changes
+        if (gFieldStatuses & STATUS_FIELD_WONDER_ROOM)
+            atkStage = gBattleMons[battlerAtk].statStages[STAT_SPDEF];
+        else
+            atkStage = gBattleMons[battlerAtk].statStages[STAT_DEF];
     }
     else
     {

test/battle/move_effect/body_press.c

@@ -1,8 +1,100 @@
 #include "global.h"
 #include "test/battle.h"
 
-TO_DO_BATTLE_TEST("Body Press's damage depends on the user's base Defense instead of its base Attack");
-TO_DO_BATTLE_TEST("Body Press's damage depends on the user's Defense stat stages");
+ASSUMPTIONS
+{
+    ASSUME(gMovesInfo[MOVE_BODY_PRESS].effect == EFFECT_BODY_PRESS);
+}
+
+SINGLE_BATTLE_TEST("Body Press's damage depends on the user's base Defense instead of its base Attack", s16 damage)
+{
+    u32 def, atk;
+    PARAMETRIZE { def = 150; atk = 179; } // Atk is higher
+    PARAMETRIZE { atk = 150; def = 179; } // Atk is lower
+    GIVEN {
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_WOBBUFFET) { Attack(atk); Defense(def); }
+    } WHEN {
+        TURN { MOVE(opponent, MOVE_BODY_PRESS); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_BODY_PRESS, opponent);
+        HP_BAR(player, captureDamage: &results[i].damage);
+    } FINALLY {
+        EXPECT_GT(results[1].damage, results[0].damage);
+    }
+}
+
+SINGLE_BATTLE_TEST("Body Press's damage depends on the user's Defense and not Attack stat stages", s16 damage)
+{
+    u32 move;
+
+    PARAMETRIZE { move = MOVE_IRON_DEFENSE; }
+    PARAMETRIZE { move = MOVE_SWORDS_DANCE; }
+    PARAMETRIZE { move = MOVE_CELEBRATE; } // Nothing, stats are default
+    GIVEN {
+        ASSUME(gMovesInfo[MOVE_IRON_DEFENSE].effect == EFFECT_DEFENSE_UP_2);
+        ASSUME(gMovesInfo[MOVE_SWORDS_DANCE].effect == EFFECT_ATTACK_UP_2);
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_WOBBUFFET) { Attack(150); Defense(150); }
+    } WHEN {
+        TURN { MOVE(opponent, move); }
+        TURN { MOVE(opponent, MOVE_BODY_PRESS); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, move, opponent);
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_BODY_PRESS, opponent);
+        HP_BAR(player, captureDamage: &results[i].damage);
+    } FINALLY {
+        EXPECT_GT(results[0].damage, results[1].damage);
+        EXPECT_EQ(results[1].damage, results[2].damage);
+    }
+}
+
+SINGLE_BATTLE_TEST("Body Press uses Defense Stat even in Wonder Room", s16 damage)
+{
+    u32 move;
+
+    PARAMETRIZE { move = MOVE_WONDER_ROOM; }
+    PARAMETRIZE { move = MOVE_CELEBRATE; }
+    GIVEN {
+        ASSUME(gMovesInfo[MOVE_WONDER_ROOM].effect == EFFECT_WONDER_ROOM);
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_WOBBUFFET) { SpDefense(50); Defense(150); }
+    } WHEN {
+        TURN { MOVE(opponent, move); }
+        TURN { MOVE(opponent, MOVE_BODY_PRESS); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, move, opponent);
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_BODY_PRESS, opponent);
+        HP_BAR(player, captureDamage: &results[i].damage);
+    } FINALLY {
+        EXPECT_EQ(results[0].damage, results[1].damage);
+    }
+}
+
+SINGLE_BATTLE_TEST("Body Press uses Special Defense stat Stages in Wonder Room", s16 damage)
+{
+    u32 move;
+
+    PARAMETRIZE { move = MOVE_IRON_DEFENSE; }
+    PARAMETRIZE { move = MOVE_AMNESIA; }
+    PARAMETRIZE { move = MOVE_CELEBRATE; } // Nothing, stats are default
+    GIVEN {
+        ASSUME(gMovesInfo[MOVE_IRON_DEFENSE].effect == EFFECT_DEFENSE_UP_2);
+        ASSUME(gMovesInfo[MOVE_AMNESIA].effect == EFFECT_SPECIAL_DEFENSE_UP_2);
+        PLAYER(SPECIES_WOBBUFFET);
+        OPPONENT(SPECIES_WOBBUFFET) { SpDefense(150); Defense(150); }
+    } WHEN {
+        TURN { MOVE(opponent, move); MOVE(player, MOVE_WONDER_ROOM); }
+        TURN { MOVE(opponent, MOVE_BODY_PRESS); }
+    } SCENE {
+        ANIMATION(ANIM_TYPE_MOVE, move, opponent);
+        ANIMATION(ANIM_TYPE_MOVE, MOVE_BODY_PRESS, opponent);
+        HP_BAR(player, captureDamage: &results[i].damage);
+    } FINALLY {
+        EXPECT_GT(results[1].damage, results[0].damage);
+        EXPECT_EQ(results[0].damage, results[2].damage);
+    }
+}
 
 // Could be split into multiple tests or maybe to separate files based on the modifier?
 TO_DO_BATTLE_TEST("Body Press's damage is influenced by all other Attack modifiers that are not stat stages");