Add test for simple beam

src/test/moves/simple_beam.test.ts

@@ -0,0 +1,42 @@
+import { Abilities } from "#enums/abilities";
+import { Moves } from "#enums/moves";
+import { Species } from "#enums/species";
+import GameManager from "#test/utils/gameManager";
+import Phaser from "phaser";
+import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
+
+describe("Moves - Simple Beam", () => {
+  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.SPLASH, Moves.SIMPLE_BEAM ])
+      .ability(Abilities.BALL_FETCH)
+      .battleType("single")
+      .disableCrits()
+      .enemySpecies(Species.MAGIKARP)
+      .enemyAbility(Abilities.BALL_FETCH)
+      .enemyMoveset(Moves.SPLASH);
+  });
+
+  it("sets the target's ability to simple", async () => {
+    await game.classicMode.startBattle([ Species.FEEBAS ]);
+
+    game.move.select(Moves.SIMPLE_BEAM);
+    await game.phaseInterceptor.to("BerryPhase");
+
+    expect(game.scene.getEnemyPokemon()?.getAbility().id).toBe(Abilities.SIMPLE);
+  });
+});