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denoland-deno/cli/tests/node_compat/test/parallel/test-next-tick-intentional-starvation.js
2023-06-02 15:05:32 +09:00

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JavaScript

// deno-fmt-ignore-file
// deno-lint-ignore-file
// Copyright Joyent and Node contributors. All rights reserved. MIT license.
// Taken from Node 18.12.1
// This file is automatically generated by `tools/node_compat/setup.ts`. Do not modify this file manually.
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
require('../common');
const assert = require('assert');
// This is the inverse of test-next-tick-starvation. it verifies
// that process.nextTick will *always* come before other events
let ran = false;
let starved = false;
const start = +new Date();
let timerRan = false;
function spin() {
ran = true;
const now = +new Date();
if (now - start > 100) {
console.log('The timer is starving, just as we planned.');
starved = true;
// now let it out.
return;
}
process.nextTick(spin);
}
function onTimeout() {
if (!starved) throw new Error('The timer escaped!');
console.log('The timer ran once the ban was lifted');
timerRan = true;
}
spin();
setTimeout(onTimeout, 50);
process.on('exit', function() {
assert.ok(ran);
assert.ok(starved);
assert.ok(timerRan);
});