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 produces the same result as x + (-y)

  *

  * @path ch11/11.6/11.6.2/S11.6.2_A4_T8.js

  * @description If the magnitude is too large to represent, the operation overflows and the result is then an infinity of appropriate sign

  */

 //CHECK#1

 if (Number.MAX_VALUE - -Number.MAX_VALUE !== Number.POSITIVE_INFINITY) {

   $ERROR('#1: Number.MAX_VALUE - -Number.MAX_VALUE === Number.POSITIVE_INFINITY. Actual: ' + (Number.MAX_VALUE - -Number.MAX_VALUE));

 }

 //CHECK#2

 if (-Number.MAX_VALUE - Number.MAX_VALUE !== Number.NEGATIVE_INFINITY) {

   $ERROR('#2: -Number.MAX_VALUE - umber.MAX_VALUE === Number.NEGATIVE_INFINITY. Actual: ' + (-Number.MAX_VALUE - umber.MAX_VALUE));

 }

 //CHECK#3

 if (1e+308 - -1e+308 !== Number.POSITIVE_INFINITY) {

   $ERROR('#3: 1e+308 - -1e+308 === Number.POSITIVE_INFINITY. Actual: ' + (1e+308 - -1e+308));

 }

 //CHECK#4

 if (-8.99e+307 - 8.99e+307 !== Number.NEGATIVE_INFINITY) {

   $ERROR('#4: -8.99e+307 - 8.99e+307 === Number.NEGATIVE_INFINITY. Actual: ' + (-8.99e+307 - 8.99e+307));

 }