@theia/core/src/common/promise-util.spec.ts

Theia is a cloud & desktop IDE framework implemented in TypeScript.

// *****************************************************************************
// Copyright (C) 2021 Red Hat and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// http://www.eclipse.org/legal/epl-2.0.
//
// This Source Code may also be made available under the following Secondary
// Licenses when the conditions for such availability set forth in the Eclipse
// Public License v. 2.0 are satisfied: GNU General Public License, version 2
// with the GNU Classpath Exception which is available at
// https://www.gnu.org/software/classpath/license.html.
//
// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
// *****************************************************************************
import * as assert from 'assert';
import { waitForEvent } from './promise-util';
import { Emitter } from './event';

describe('promise-util', () => {
    it('should time out', async () => {
        const emitter = new Emitter<string>();
        try {
            await waitForEvent(emitter.event, 1000);
            assert.fail('did not time out');
        } catch (e) {
            // OK
        }
    });

    describe('promise-util', () => {
        it('should get event', async () => {
            const emitter = new Emitter<string>();
            setTimeout(() => {
                emitter.fire('abcd');
            }, 500);
            assert.strictEqual(await waitForEvent(emitter.event, 1000), 'abcd');
        });
    });

});