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 uses GetValue

  *

  * @path ch11/11.4/11.4.9/S11.4.9_A2.1_T1.js

  * @description Either Type(x) is not Reference or GetBase(x) is not null

  */

 //CHECK#1

 if (!true !== false) {

   $ERROR('#1: !true === false');

 }

 //CHECK#2

 if (!(!true) !== true) {

   $ERROR('#2: !(!true) === true');

 }

 //CHECK#3

 var x = true;

 if (!x !== false) {

   $ERROR('#3: var x = true; !x === false');

 }

 //CHECK#4

 var x = true;

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

   $ERROR('#4: var x = true; !(!x) === true');

 }

 //CHECK#5

 var object = new Object();

 object.prop = true;

 if (!object.prop !== false) {

   $ERROR('#5: var object = new Object(); object.prop = true; !object.prop === false');

 }