The Tor Browser / file revision

 /*

  * Any copyright is dedicated to the Public Domain.

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

  * Contributor:

  *   Jeff Walden <jwalden+code@mit.edu>

  */

 //-----------------------------------------------------------------------------

 var BUGNUMBER = 562446;

 var summary = 'ES5: Array.prototype.toString';

 print(BUGNUMBER + ": " + summary);

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

  * BEGIN TEST *

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

 var o;

 o = { join: function() { assertEq(arguments.length, 0); return "ohai"; } };

 assertEq(Array.prototype.toString.call(o), "ohai");

 o = {};

 assertEq(Array.prototype.toString.call(o), "[object Object]");

 Array.prototype.join = function() { return "kthxbai"; };

 assertEq(Array.prototype.toString.call([]), "kthxbai");

 o = { join: 17 };

 assertEq(Array.prototype.toString.call(o), "[object Object]");

 o = { get join() { throw 42; } };

 try

 {

   var str = Array.prototype.toString.call(o);

   assertEq(true, false,

            "expected an exception calling [].toString on an object with a " +

            "join getter that throws, got " + str + " instead");

 }

 catch (e)

 {

   assertEq(e, 42,

            "expected thrown e === 42 when calling [].toString on an object " +

            "with a join getter that throws, got " + e);

 }

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

 if (typeof reportCompare === "function")

   reportCompare(true, true);

 print("All tests passed!");