The Tor Browser / file revision

 // Copyright 2009 the Sputnik authors.  All rights reserved.

 // This code is governed by the BSD license found in the LICENSE file.

 /**

  * Operator --x returns ToNumber(x) - 1

  *

  * @path ch11/11.4/11.4.5/S11.4.5_A4_T3.js

  * @description Type(x) is string primitive or String object

  */

 //CHECK#1

 var x = "1";

 if (--x !== 1 - 1) {

   $ERROR('#1: var x = "1"; --x === 1 - 1. Actual: ' + (--x));

 }

 //CHECK#2

 var x = "x";

 if (isNaN(--x) !== true) {

   $ERROR('#2: var x = "x"; --x === Not-a-Number. Actual: ' + (--x));

 }

 //CHECK#3

 var x = new String("-1"); 

 if (--x !== -1 - 1) {

   $ERROR('#3: var x = new String("-1"); --x === -1 - 1. Actual: ' + (--x));

 }