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 / y returns ToNumber(x) / ToNumber(y)

  *

  * @path ch11/11.5/11.5.2/S11.5.2_A3_T1.4.js

  * @description Type(x) and Type(y) vary between Null and Undefined

  */

 //CHECK#1

 if (isNaN(null / undefined) !== true) {

   $ERROR('#1: null / undefined === Not-a-Number. Actual: ' + (null / undefined));

 }

 //CHECK#2

 if (isNaN(undefined / null) !== true) {

   $ERROR('#2: undefined / null === Not-a-Number. Actual: ' + (undefined / null));

 }

 //CHECK#3

 if (isNaN(undefined / undefined) !== true) {

   $ERROR('#3: undefined / undefined === Not-a-Number. Actual: ' + (undefined / undefined));

 }

 //CHECK#4

 if (isNaN(null / null) !== true) {

   $ERROR('#4: null / null === Not-a-Number. Actual: ' + (null / null));

 }