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/*
* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/licenses/publicdomain/
*/
var gTestfile = 'proxy-array-target-length-definition.js';
var BUGNUMBER = 905947;
var summary =
"Redefining an array's |length| property when redefining the |length| " +
"property on a proxy with an array as target";
print(BUGNUMBER + ": " + summary);
/**************
* BEGIN TEST *
**************/
var arr = [];
var p = new Proxy(arr, {});
function assertThrowsTypeError(f)
{
try {
f();
assertEq(false, true, "Must have thrown");
} catch (e) {
assertEq(e instanceof TypeError, true, "Must have thrown TypeError");
}
}
// Redefining non-configurable length should throw a TypeError
assertThrowsTypeError(function () { Object.defineProperty(p, "length", { value: 17, configurable: true }); });
// Same here.
assertThrowsTypeError(function () { Object.defineProperty(p, "length", { value: 42, enumerable: true }); });
// Check the property went unchanged.
var pd = Object.getOwnPropertyDescriptor(p, "length");
assertEq(pd.value, 0);
assertEq(pd.writable, true);
assertEq(pd.enumerable, false);
assertEq(pd.configurable, false);
var ad = Object.getOwnPropertyDescriptor(arr, "length");
assertEq(ad.value, 0);
assertEq(ad.writable, true);
assertEq(ad.enumerable, false);
assertEq(ad.configurable, false);
/******************************************************************************/
if (typeof reportCompare === "function")
reportCompare(true, true);
print("Tests complete");
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