rsxjs/__tests__/integration/channel/test-chan-num.js

Resilience Extensions for JS.

/**
 * @file tests/integration/channel/test-chan-num.js
 * @description Testing behavior of a simple number channel in buffered & unbuffered modes.
 * @copyright 2018-present Karim Alibhai. All rights reserved.
 */

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

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

test("put with no take", async (t) => {
  const c = makeChan();
  const r = Math.random();
  t.deepEqual(await c.put(r, 100), { ok: false });
});

test("chan: unbuffered number", async (t) => {
  const c = makeChan();
  const r = Math.random();
  const p = c.take();
  t.deepEqual(await c.put(r), { ok: true });
  t.deepEqual(await p, { ok: true, value: r });
});

test("chan: buffered number", async (t) => {
  const c = makeChan({
    bufferSize: 1,
  });
  const r = Math.random();

  t.deepEqual(await c.put(r), { ok: true });
  t.deepEqual(await c.take(), { ok: true, value: r });
});

test("chan: buffered then unbuffered", async (t) => {
  const c = makeChan({
    bufferSize: 1,
  });
  const r1 = Math.random();
  const r2 = Math.random();

  t.deepEqual(await c.put(r1), { ok: true });
  t.deepEqual(await c.put(r2, 10), { ok: false });

  t.deepEqual(await c.take(), { ok: true, value: r1 });

  // since put for r2 has failed, takes should return nothing
  t.deepEqual(await c.take(10), { ok: false });
});