test/built-ins/Array/prototype/forEach/15.4.4.18-8-6.js


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// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
esid: sec-array.prototype.foreach
es5id: 15.4.4.18-8-6
description: >
    Array.prototype.forEach doesn't call callbackfn if 'length' is 0
    (subclassed Array, length overridden with obj with valueOf)
---*/

  foo.prototype = new Array(1, 2, 3);
  function foo() {}
  var f = new foo();

  var o = { valueOf: function () { return 0;}};
  f.length = o;

  var callCnt = 0;
  function cb(){callCnt++}
  var i = f.forEach(cb);

assert.sameValue(callCnt, 0, 'callCnt');