rsxjs/__tests__/integration/deferral/test-on-failure.js

Resilience Extensions for JS.

/**
 * @file tests/deferral/test-on-failure.js
 * @copyright 2018-present Karim Alibhai. All rights reserved.
 */

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

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

test("on failure", async (t) => {
  const fn = spy(() => {});
  const op = Deferral.fromAsync(async function (defer) {
    defer(fn);
    throw new Error("Failure");
  });

  const e = await t.throwsAsync(op());
  t.is(String(e), "Error: Failure");
  t.true(fn.calledOnce);
});

test("on failure with generator", async (t) => {
  const fn = spy(() => {});
  const op = Deferral.fromGenerator(function* (defer) {
    defer(fn);
    throw new Error("Failure");
  });

  const e = await t.throwsAsync(op());
  t.is(String(e), "Error: Failure");
  t.true(fn.calledOnce);
});