destructuring-__proto__-shorthand-assignment.js

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/*

 * Any copyright is dedicated to the Public Domain.

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

*/

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

var BUGNUMBER = 963641;

var summary = "{ __proto__ } 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__ } = objectWithProtoProperty(42);

assertEq(__proto__, 42);

({ __proto__ } = objectWithProtoProperty(17));

assertEq(__proto__, 17);

function nested()

  var { __proto__ } = objectWithProtoProperty("fnord");

  assertEq(__proto__, "fnord");

  ({ __proto__ } = objectWithProtoProperty(undefined));

  assertEq(__proto__, undefined);

nested();

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

if (typeof reportCompare === "function")

  reportCompare(true, true);

print("Tests complete");