destructuring-for-inof-__proto__.js

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/*

 * Any copyright is dedicated to the Public Domain.

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

*/

var gTestfile = 'destructuring-for-inof-__proto__.js';

var BUGNUMBER = 963641;

var summary =

  "__proto__ should work in destructuring patterns as the targets of " +

  "for-in/for-of loops";

print(BUGNUMBER + ": " + summary);

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

 * BEGIN TEST *

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

function objectWithProtoProperty(v)

  var obj = {};

  return Object.defineProperty(obj, "__proto__",

                                 enumerable: true,

                                 configurable: true,

                                 writable: true,

                                 value: v

});

function* objectWithProtoGenerator(v)

  yield objectWithProtoProperty(v);

function* identityGenerator(v)

  yield v;

for (var { __proto__: target } of objectWithProtoGenerator(null))

  assertEq(target, null);

for ({ __proto__: target } of objectWithProtoGenerator("aacchhorrt"))

  assertEq(target, "aacchhorrt");

for ({ __proto__: target } of identityGenerator(42))

  assertEq(target, Number.prototype);

for (var { __proto__: target } in { prop: "kneedle" })

  assertEq(target, String.prototype);

for ({ __proto__: target } in { prop: "snork" })

  assertEq(target, String.prototype);

for ({ __proto__: target } in { prop: "ohia" })

  assertEq(target, String.prototype);

function nested()

  for (var { __proto__: target } of objectWithProtoGenerator(null))

    assertEq(target, null);

  for ({ __proto__: target } of objectWithProtoGenerator("aacchhorrt"))

    assertEq(target, "aacchhorrt");

  for ({ __proto__: target } of identityGenerator(42))

    assertEq(target, Number.prototype);

  for (var { __proto__: target } in { prop: "kneedle" })

    assertEq(target, String.prototype);

  for ({ __proto__: target } in { prop: "snork" })

    assertEq(target, String.prototype);

  for ({ __proto__: target } in { prop: "ohia" })

    assertEq(target, String.prototype);

nested();

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

if (typeof reportCompare === "function")

  reportCompare(true, true);

print("Tests complete");