pokerogue/test/phases/form-change-phase.test.ts

import { Abilities } from "#enums/abilities";
import { Moves } from "#enums/moves";
import { Species } from "#enums/species";
import GameManager from "#test/testUtils/gameManager";
import Phaser from "phaser";
import { afterEach, beforeAll, beforeEach, describe, expect, it } from "vitest";
import { PokemonType } from "#enums/pokemon-type";
import { generateModifierType } from "#app/data/mystery-encounters/utils/encounter-phase-utils";
import { modifierTypes } from "#app/modifier/modifier-type";

describe("Form Change Phase", () => {
  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])
      .ability(Abilities.BALL_FETCH)
      .battleType("single")
      .disableCrits()
      .enemySpecies(Species.MAGIKARP)
      .enemyAbility(Abilities.BALL_FETCH)
      .enemyMoveset(Moves.SPLASH);
  });

  it("Zacian should successfully change into Crowned form", async () => {
    await game.classicMode.startBattle([Species.ZACIAN]);

    // Before the form change: Should be Hero form
    const zacian = game.scene.getPlayerParty()[0];
    expect(zacian.getFormKey()).toBe("hero-of-many-battles");
    expect(zacian.getTypes()).toStrictEqual([PokemonType.FAIRY]);
    expect(zacian.calculateBaseStats()).toStrictEqual([92, 120, 115, 80, 115, 138]);

    // Give Zacian a Rusted Sword
    const rustedSwordType = generateModifierType(modifierTypes.RARE_FORM_CHANGE_ITEM)!;
    const rustedSword = rustedSwordType.newModifier(zacian);
    await game.scene.addModifier(rustedSword);

    game.move.select(Moves.SPLASH);
    await game.toNextTurn();

    // After the form change: Should be Crowned form
    expect(game.phaseInterceptor.log.includes("FormChangePhase")).toBe(true);
    expect(zacian.getFormKey()).toBe("crowned");
    expect(zacian.getTypes()).toStrictEqual([PokemonType.FAIRY, PokemonType.STEEL]);
    expect(zacian.calculateBaseStats()).toStrictEqual([92, 150, 115, 80, 115, 148]);
  });
});