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

import { throttle } from "../../src";

describe("throttle", () => {
  test("calls immediately then throttles", async () => {
    vi.useFakeTimers();
    const fn = vi.fn();
    const throttled = throttle(fn, 100);

    throttled();
    expect(fn).toHaveBeenCalledTimes(1);

    throttled();
    expect(fn).toHaveBeenCalledTimes(1);

    vi.advanceTimersByTime(100);
    throttled();
    expect(fn).toHaveBeenCalledTimes(2);

    vi.useRealTimers();
  });
});