add helper for forcing AI move targetting

src/test/utils/helpers/moveHelper.ts

@@ -1,6 +1,8 @@
 import { vi } from "vitest";
 import { MoveEffectPhase } from "#app/phases.js";
 import { GameManagerHelper } from "./gameManagerHelper";
+import { BattlerIndex } from "#app/battle.js";
+import { EnemyPokemon } from "#app/field/pokemon.js";
 
 /**
  * Helper to handle a Pokemon's move
@@ -32,4 +34,13 @@ export class MoveHelper extends GameManagerHelper {
       hitCheck.mockReturnValue(false);
     }
   }
+
+  /**
+   * Forces an enemy Pokemon to attack into a certain slot
+   * @param pokemon Pokemon to force the attack of
+   * @param slot BattlerIndex to force the attack into
+   */
+  forceAiTargets(pokemon: EnemyPokemon | undefined, slot: BattlerIndex | BattlerIndex[]) {
+    vi.spyOn(pokemon!, "getNextTargets").mockReturnValue(Array.isArray(slot) ? slot : [slot]);
+  }
 }