rsxjs/__tests__/integration/waitgroup/test-recursive-promise-waitgroup.js

Resilience Extensions for JS.

/**
 * @file tests/waitgroup/test-promise-waitgroup.js
 * @description Testing waitgroups with pushing promises onto the group.
 * @copyright 2018-present Karim Alibhai. All rights reserved.
 */

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

import { WaitGroup } from "../../../";

const SIZE = 10;
const DELAY = 100;

test("waitgroup: with recursive promises", async (t) => {
  const wg = new WaitGroup();

  const start = Date.now();
  for (let i = 0; i < SIZE; ++i) {
    wg.add(
      new Promise((r) =>
        setTimeout(() => {
          r();
          wg.add(
            new Promise((rr) => {
              setTimeout(rr, DELAY);
            })
          );
        }, DELAY)
      )
    );
  }
  await wg.wait();

  const dur = Date.now() - start;
  t.true(dur >= DELAY, `Took ${dur}ms, should've taken more than ${DELAY}ms`);
});