`vi.restoreAllMocks()`

import { afterEach, expect, test, vi } from "vitest";

const calculator = {
  multiply: (a: number, b: number) => a * b,
};

afterEach(() => {
  vi.restoreAllMocks();
});

test("restores calculator method after the test", () => {
  const spy = vi.spyOn(calculator, "multiply");

  expect(calculator.multiply(2, 5)).toBe(10);
  expect(spy).toHaveBeenCalledTimes(1);
});

const spy = vi.spyOn(calculator, "multiply");

// test แรก
calculator.multiply(2, 5);

// ถ้าไม่ restore
// test ถัดไปยังเห็น method ที่ถูก spy

vi.restoreAllMocks();
// calculator.multiply กลับไปใช้ implementation เดิม