destructuring-__proto__-target-assignment.js

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/*

 * Any copyright is dedicated to the Public Domain.

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

*/

var gTestfile = 'destructuring-__proto__-target--assignment.js';

var BUGNUMBER = 963641;

var summary =

  "{ __proto__: target } should work as a destructuring assignment pattern";

print(BUGNUMBER + ": " + summary);

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

 * BEGIN TEST *

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

function objectWithProtoProperty(v)

  var obj = {};

  return Object.defineProperty(obj, "__proto__",

                                 enumerable: true,

                                 configurable: true,

                                 writable: true,

                                 value: v

});

var { __proto__: target } = objectWithProtoProperty(null);

assertEq(target, null);

({ __proto__: target } = objectWithProtoProperty("aacchhorrt"));

assertEq(target, "aacchhorrt");

function nested()

  var { __proto__: target } = objectWithProtoProperty(3.141592654);

  assertEq(target, 3.141592654);

  ({ __proto__: target } = objectWithProtoProperty(-0));

  assertEq(target, -0);

nested();

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

if (typeof reportCompare === "function")

  reportCompare(true, true);

print("Tests complete");