node/test/simple/test-timers.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// "Software"), to deal in the Software without restriction, including
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// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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var common = require('../common');
var assert = require('assert');

var inputs = [
  undefined,
  null,
  true,
  false,
  '',
  [],
  {},
  NaN,
  +Infinity,
  -Infinity,
  (1.0 / 0.0),      // sanity check
  parseFloat('x'),  // NaN
  -10,
  -1,
  -0.5,
  -0.0,
  0,
  0.0,
  0.5,
  1,
  1.0,
  10,
  2147483648 // browser behaviour: timeouts > 2^31-1 run on next tick
];

var timeouts = [];
var intervals = [];

inputs.forEach(function(value, index) {
  setTimeout(function() {
    timeouts[index] = true;
  }, value);

  var handle = setInterval(function() {
    clearInterval(handle); // disarm timer or we'll never finish
    intervals[index] = true;
  }, value);
});

process.on('exit', function() {
  // assert that all timers have run
  inputs.forEach(function(value, index) {
    assert.equal(true, timeouts[index]);
    assert.equal(true, intervals[index]);
  });
});