1// Copyright Joyent, Inc. and other Node contributors.
2//
3// Permission is hereby granted, free of charge, to any person obtaining a
4// copy of this software and associated documentation files (the
5// "Software"), to deal in the Software without restriction, including
6// without limitation the rights to use, copy, modify, merge, publish,
7// distribute, sublicense, and/or sell copies of the Software, and to permit
8// persons to whom the Software is furnished to do so, subject to the
9// following conditions:
10//
11// The above copyright notice and this permission notice shall be included
12// in all copies or substantial portions of the Software.
13//
14// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
17// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20// USE OR OTHER DEALINGS IN THE SOFTWARE.
21
22'use strict';
23require('../common');
24const assert = require('assert');
25
26// setImmediate should run clear its queued cbs once per event loop turn
27// but immediates queued while processing the current queue should happen
28// on the next turn of the event loop.
29
30// hit should be the exact same size of QUEUE, if we're letting things
31// recursively add to the immediate QUEUE hit will be > QUEUE
32
33let ticked = false;
34
35let hit = 0;
36const QUEUE = 10;
37
38function run() {
39  if (hit === 0) {
40    setTimeout(() => { ticked = true; }, 1);
41    const now = Date.now();
42    while (Date.now() - now < 2);
43  }
44
45  if (ticked) return;
46
47  hit += 1;
48  setImmediate(run);
49}
50
51for (let i = 0; i < QUEUE; i++)
52  setImmediate(run);
53
54process.on('exit', function() {
55  console.log('hit', hit);
56  assert.strictEqual(hit, QUEUE);
57});
58