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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 = 858381;
var summary =
"Array length redefinition behavior with non-configurable elements";
print(BUGNUMBER + ": " + summary);
/**************
* BEGIN TEST *
**************/
function addDataProperty(obj, prop, value, enumerable, configurable, writable)
{
var desc =
{ enumerable: enumerable,
configurable: configurable,
writable: writable,
value: value };
Object.defineProperty(obj, prop, desc);
}
function nonstrict()
{
var arr = [0, , 2, , , 5];
addDataProperty(arr, 31415926, "foo", true, true, true);
addDataProperty(arr, 123456789, "bar", true, true, false);
addDataProperty(arr, 8675309, "qux", false, true, true);
addDataProperty(arr, 1735039, "eit", false, true, false);
addDataProperty(arr, 987654321, "fun", false, true, false);
// non-array indexes to spice things up
addDataProperty(arr, "foopy", "sdfsd", false, false, false);
addDataProperty(arr, 4294967296, "psych", true, false, false);
addDataProperty(arr, 4294967295, "psych", true, false, false);
addDataProperty(arr, 27182818, "eep", false, false, false);
// Truncate...but only as far as possible.
arr.length = 1;
assertEq(arr.length, 27182819);
var props = Object.getOwnPropertyNames(arr).sort();
var expected =
["0", "2", "5", "1735039", "8675309", "27182818",
"foopy", "4294967296", "4294967295", "length"].sort();
assertEq(props.length, expected.length);
for (var i = 0; i < props.length; i++)
assertEq(props[i], expected[i], "unexpected property: " + props[i]);
}
nonstrict();
function strict()
{
"use strict";
var arr = [0, , 2, , , 5];
addDataProperty(arr, 31415926, "foo", true, true, true);
addDataProperty(arr, 123456789, "bar", true, true, false);
addDataProperty(arr, 8675309, "qux", false, true, true);
addDataProperty(arr, 1735039, "eit", false, true, false);
addDataProperty(arr, 987654321, "fun", false, true, false);
// non-array indexes to spice things up
addDataProperty(arr, "foopy", "sdfsd", false, false, false);
addDataProperty(arr, 4294967296, "psych", true, false, false);
addDataProperty(arr, 4294967295, "psych", true, false, false);
addDataProperty(arr, 27182818, "eep", false, false, false);
try
{
arr.length = 1;
throw new Error("didn't throw?!");
}
catch (e)
{
assertEq(e instanceof TypeError, true,
"non-configurable property should trigger TypeError, got " + e);
}
assertEq(arr.length, 27182819);
var props = Object.getOwnPropertyNames(arr).sort();
var expected =
["0", "2", "5", "1735039", "8675309", "27182818",
"foopy", "4294967296", "4294967295", "length"].sort();
assertEq(props.length, expected.length);
for (var i = 0; i < props.length; i++)
assertEq(props[i], expected[i], "unexpected property: " + props[i]);
}
strict();
/******************************************************************************/
if (typeof reportCompare === "function")
reportCompare(true, true);
print("Tests complete");
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