test/built-ins/Array/prototype/lastIndexOf/15.4.4.15-3-10.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.lastindexof
es5id: 15.4.4.15-3-10
description: >
    Array.prototype.lastIndexOf - value of 'length' is a number (value
    is NaN)
---*/

var obj = {
  0: 0,
  length: NaN
};

assert.sameValue(Array.prototype.lastIndexOf.call(obj, 0), -1, 'Array.prototype.lastIndexOf.call(obj, 0)');