rsxjs/__tests__/integration/utils/test-debounce.js

Resilience Extensions for JS.

/**
 * @file tests/utils/test-debounce.js
 * @copyright 2018-present Karim Alibhai. All rights reserved.
 */

import { test } from "../../helpers";
import { spy } from "sinon";

import { debounce, delay } from "../../../";

test("debounce", async (t) => {
  const _fn = spy(() => {});
  const fn = debounce(_fn, 100);
  const called = (n) => t.is(_fn.callCount, n);

  // all 10 calls should be ignored
  for (let i = 0; i < 10; ++i) fn();
  called(0);

  // wait for debounce delay plus a bit, since
  // timeouts are not exact
  await delay(150);
  called(1);
});