redefine-nonwritable-length-custom-conversion-call-counts.js

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/*

 * Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/licenses/publicdomain/

 * Contributor:

 *   Jeff Walden <jwalden+code@mit.edu>

*/

//-----------------------------------------------------------------------------

var BUGNUMBER = 866700;

var summary = "Assertion redefining non-writable length to a non-numeric value";

print(BUGNUMBER + ": " + summary);

/**************

 * BEGIN TEST *

 **************/

var count = 0;

var convertible =

    valueOf: function()

      count++;

      return 0;

};

var arr = [];

Object.defineProperty(arr, "length", { value: 0, writable: false });

Object.defineProperty(arr, "length", { value: convertible });

assertEq(count, 2);

Object.defineProperty(arr, "length", { value: convertible });

assertEq(count, 4);

assertEq(arr.length, 0);

/******************************************************************************/

if (typeof reportCompare === "function")

  reportCompare(true, true);

print("Tests complete");