test/built-ins/Array/prototype/some/15.4.4.17-2-4.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.some
es5id: 15.4.4.17-2-4
description: >
    Array.prototype.some - 'length' is an own data property that
    overrides an inherited data property on an array
---*/

var arrProtoLen = 0;

function callbackfn1(val, idx, obj) {
  return val > 10;
}

function callbackfn2(val, idx, obj) {
  return val > 11;
}

arrProtoLen = Array.prototype.length;
Array.prototype.length = 0;
Array.prototype[2] = 12;

assert([9, 11].some(callbackfn1), '[9, 11].some(callbackfn1) !== true');
assert.sameValue([9, 11].some(callbackfn2), false, '[9, 11].some(callbackfn2)');