rsxjs/__tests__/integration/fallback/test-from-async.js

Resilience Extensions for JS.

/**
 * @file tests/fallback/test-from-async.js
 * @copyright 2018-present Karim Alibhai. All rights reserved.
 */

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

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

test("fromAsync()#asyncFallback", async (t) => {
  const FALLBACK_VALUE = Math.PI;

  const fn = Fallback.fromAsync(
    async () => {
      throw new Error("Failure");
    },
    async () => {
      return FALLBACK_VALUE;
    }
  );

  t.is(await fn(), Math.PI);
});

test("fromAsync()#syncFallback", async (t) => {
  const FALLBACK_VALUE = Math.PI;

  const fn = Fallback.fromAsync(
    async () => {
      throw new Error("Failure");
    },
    () => FALLBACK_VALUE
  );

  t.is(await fn(), Math.PI);
});