node/test/simple/test-timers-unref-remove-other-unref-timers.js

// Copyright Joyent, Inc. and other Node contributors.
//
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//
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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/*
 * This test is a regression test for joyent/node#8897.
 *
 * It tests some private implementation details that should not be
 * considered public interface.
 */
var timers = require('timers');

var foo = new function() {
  this._onTimeout = function() {};
}();

var bar = new function() {
  this._onTimeout = function() {
    timers.unenroll(foo);
  };
}();

// We use timers with expiration times that are sufficiently apart to make
// sure that they're not fired at the same time on platforms where the timer
// resolution is a bit coarse (e.g Windows with a default resolution of ~15ms).
timers.enroll(bar, 1);
timers._unrefActive(bar);

timers.enroll(foo, 50);
timers._unrefActive(foo);

setTimeout(function() {}, 100);