The Tor Browser / file revision

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

 /*

  * Any copyright is dedicated to the Public Domain.

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

  */

 // Shu's test

 function test(makeNonArray) {

     function C() {}

     C.prototype = []

     if (makeNonArray)

         C.prototype.constructor = C

     c = new C();

     c.push("foo");

     return c.length

 }

 assertEq(test(true), 1);

 assertEq(test(false), 1);

 // jorendorff's longer test

 var a = [];

 a.slowify = 1;

 var b = Object.create(a);

 b.length = 12;

 assertEq(b.length, 12);

 // jorendorff's shorter test

 var b = Object.create(Array.prototype);

 b.length = 12;

 assertEq(b.length, 12);

 reportCompare(true, true);