[P2] Diamond Storm should only trigger once when hitting multiple pokemon (#4544)

* Diamond Storm should only trigger once when hitting multiple pokemon

* Also fix Clangorous Soulblaze just in case

* Fix linting

* Fix linting

Oops missed this one

src/data/move.ts

@@ -8756,7 +8756,7 @@ export function initMoves() {
       .attr(StatStageChangeAttr, [ Stat.SPATK ], -1)
       .soundBased(),
     new AttackMove(Moves.DIAMOND_STORM, Type.ROCK, MoveCategory.PHYSICAL, 100, 95, 5, 50, 0, 6)
-      .attr(StatStageChangeAttr, [ Stat.DEF ], 2, true)
+      .attr(StatStageChangeAttr, [ Stat.DEF ], 2, true, undefined, undefined, undefined, undefined, true)
       .makesContact(false)
       .target(MoveTarget.ALL_NEAR_ENEMIES),
     new AttackMove(Moves.STEAM_ERUPTION, Type.WATER, MoveCategory.SPECIAL, 110, 95, 5, 30, 0, 6)
@@ -9183,7 +9183,7 @@ export function initMoves() {
       .makesContact(false)
       .ignoresVirtual(),
     new AttackMove(Moves.CLANGOROUS_SOULBLAZE, Type.DRAGON, MoveCategory.SPECIAL, 185, -1, 1, 100, 0, 7)
-      .attr(StatStageChangeAttr, [ Stat.ATK, Stat.DEF, Stat.SPATK, Stat.SPDEF, Stat.SPD ], 1, true)
+      .attr(StatStageChangeAttr, [ Stat.ATK, Stat.DEF, Stat.SPATK, Stat.SPDEF, Stat.SPD ], 1, true, undefined, undefined, undefined, undefined, true)
       .soundBased()
       .target(MoveTarget.ALL_NEAR_ENEMIES)
       .partial()

src/test/moves/diamond_storm.test.ts

@@ -0,0 +1,46 @@
+import { allMoves } from "#app/data/move";
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import { Stat } from "#enums/stat";
+import GameManager from "#test/utils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";
+
+describe("Moves - Diamond Storm", () => {
+  let phaserGame: Phaser.Game;
+  let game: GameManager;
+
+  beforeAll(() => {
+    phaserGame = new Phaser.Game({
+      type: Phaser.HEADLESS,
+    });
+  });
+
+  afterEach(() => {
+    game.phaseInterceptor.restoreOg();
+  });
+
+  beforeEach(() => {
+    game = new GameManager(phaserGame);
+    game.override
+      .moveset([ Moves.DIAMOND_STORM ])
+      .battleType("single")
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("should only increase defense once even if hitting 2 pokemon", async () => {
+    game.override.battleType("double");
+    const diamondStorm = allMoves[Moves.DIAMOND_STORM];
+    vi.spyOn(diamondStorm, "chance", "get").mockReturnValue(100);
+    vi.spyOn(diamondStorm, "accuracy", "get").mockReturnValue(100);
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+
+    game.move.select(Moves.DIAMOND_STORM);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(game.scene.getPlayerPokemon()!.getStatStage(Stat.DEF)).toBe(2);
+  });
+});