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test: regression test for #5798 setImmediate

v0.11.4-release
Timothy J Fontaine 12 years ago
committed by isaacs
parent
commit
f88b8dad84
  1. 9
      doc/api/timers.markdown
  2. 55
      test/simple/test-timers-immediate-queue.js

9
doc/api/timers.markdown

@ -54,11 +54,10 @@ callbacks and before `setTimeout` and `setInterval` . Returns an
`immediateId` for possible use with `clearImmediate()`. Optionally you
can also pass arguments to the callback.
Immediates are queued in the order created, and are popped off the queue once
per loop iteration. `setImmediate` will yield to the event loop after firing a
queued callback to make sure I/O is not being starved. While order is preserved
for execution, other I/O events may fire between any two scheduled immediate
callbacks.
Callbacks for immediates are queued in the order in which they were created.
The entire callback queue is processed every event loop iteration. If you queue
an immediate from a inside an executing callback that immediate won't fire
until the next event loop iteration.
## clearImmediate(immediateId)

55
test/simple/test-timers-immediate-queue.js

@ -0,0 +1,55 @@
// 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.
var common = require('../common');
var assert = require('assert');
// setImmediate should run clear its queued cbs once per event loop turn
// but immediates queued while processing the current queue should happen
// on the next turn of the event loop.
// in v0.10 hit should be 1, because we only process one cb per turn
// in v0.11 and beyond it should be the exact same size of QUEUE
// if we're letting things recursively add to the immediate QUEUE hit will be
// > QUEUE
var ticked = false;
var hit = 0;
var QUEUE = 1000;
function run() {
if (hit === 0)
process.nextTick(function() { ticked = true; });
if (ticked) return;
hit += 1;
setImmediate(run);
}
for (var i = 0; i < QUEUE; i++)
setImmediate(run);
process.on('exit', function() {
console.log('hit', hit);
assert.strictEqual(hit, QUEUE, 'We ticked between the immediate queue');
});
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