JSTests/test262/test/language/expressions/addition/S11.6.1_A4_T7.js

// Copyright 2009 the Sputnik authors.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
info: |
    The result of an addition is determined using the rules of IEEE 754
    double-precision arithmetics
es5id: 11.6.1_A4_T7
description: >
    The sum of two nonzero finite values of the same magnitude and
    opposite sign is +0
---*/

//CHECK#1
if (-Number.MIN_VALUE + Number.MIN_VALUE !== +0) {  
  $ERROR('#1.1: -Number.MIN_VALUE + Number.MIN_VALUE === 0. Actual: ' + (-Number.MIN_VALUE + Number.MIN_VALUE));
} else {
  if (1 / (-Number.MIN_VALUE + Number.MIN_VALUE) !== Number.POSITIVE_INFINITY) {
    $ERROR('#1.2: -Number.MIN_VALUE + Number.MIN_VALUE === + 0. Actual: -0');
  }
}

//CHECK#2
if (-Number.MAX_VALUE + Number.MAX_VALUE !== +0) {  
  $ERROR('#2.1: -Number.MAX_VALUE + Number.MAX_VALUE === 0. Actual: ' + (-Number.MAX_VALUE + Number.MAX_VALUE));
} else {
  if (1 / (-Number.MAX_VALUE + Number.MAX_VALUE) !== Number.POSITIVE_INFINITY) {
    $ERROR('#2.2: -Number.MAX_VALUE + Number.MAX_VALUE === + 0. Actual: -0');
  }
}

//CHECK#3
if (-1 / Number.MAX_VALUE + 1 / Number.MAX_VALUE !== +0) {  
  $ERROR('#3.1: -1 / Number.MAX_VALUE + 1 / Number.MAX_VALUE === 0. Actual: ' + (-1 / Number.MAX_VALUE + 1 / Number.MAX_VALUE));
} else {
  if (1 / (-1 / Number.MAX_VALUE + 1 / Number.MAX_VALUE) !== Number.POSITIVE_INFINITY) {
    $ERROR('#3.2: -1 / Number.MAX_VALUE + 1 / Number.MAX_VALUE === + 0. Actual: -0');
  }
}