node/test/simple/test-timers-this.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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var assert = require('assert');

var immediateThis, intervalThis, timeoutThis,
    immediateArgsThis, intervalArgsThis, timeoutArgsThis;

var immediateHandler = setImmediate(function () {
  immediateThis = this;
});

var immediateArgsHandler = setImmediate(function () {
  immediateArgsThis = this;
}, "args ...");

var intervalHandler = setInterval(function () {
  clearInterval(intervalHandler);

  intervalThis = this;
});

var intervalArgsHandler = setInterval(function () {
  clearInterval(intervalArgsHandler);

  intervalArgsThis = this;
}, 0, "args ...");

var timeoutHandler = setTimeout(function () {
  timeoutThis = this;
});

var timeoutArgsHandler = setTimeout(function () {
  timeoutArgsThis = this;
}, 0, "args ...");

process.once('exit', function () {
  assert.strictEqual(immediateThis, immediateHandler);
  assert.strictEqual(immediateArgsThis, immediateArgsHandler);

  assert.strictEqual(intervalThis, intervalHandler);
  assert.strictEqual(intervalArgsThis, intervalArgsHandler);

  assert.strictEqual(timeoutThis, timeoutHandler);
  assert.strictEqual(timeoutArgsThis, timeoutArgsHandler);
});