/
pTimeout.test.js
57 lines (50 loc) · 1.59 KB
/
pTimeout.test.js
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/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
*/
'use strict';
jest.useFakeTimers();
import pTimeout from '../pTimeout';
describe('pTimeout', () => {
beforeEach(() => {
jest.spyOn(global, 'setTimeout');
jest.spyOn(global, 'clearTimeout');
});
it('calls `clearTimeout` and resolves when `promise` resolves.', async () => {
const onTimeout = jest.fn();
const promise = Promise.resolve();
await pTimeout(promise, 1000, clearTimeout, setTimeout, onTimeout);
expect(setTimeout).toHaveBeenCalled();
expect(clearTimeout).toHaveBeenCalled();
expect(onTimeout).not.toHaveBeenCalled();
});
it('calls `clearTimeout` and rejects when `promise` rejects.', async () => {
const onTimeout = jest.fn();
const promise = Promise.reject();
try {
await pTimeout(promise, 1000, clearTimeout, setTimeout, onTimeout);
} catch (e) {}
expect(setTimeout).toHaveBeenCalled();
expect(clearTimeout).toHaveBeenCalled();
expect(onTimeout).not.toHaveBeenCalled();
});
it('calls `onTimeout` on timeout.', async () => {
const onTimeout = jest.fn();
// A Promise that never resolves or rejects.
const promise = new Promise(() => {});
const timeoutPromise = pTimeout(
promise,
1000,
clearTimeout,
setTimeout,
onTimeout,
);
jest.runAllTimers();
await timeoutPromise;
expect(setTimeout).toHaveBeenCalled();
expect(onTimeout).toHaveBeenCalled();
});
});