test262/test/language/expressions/addition/S11.6.1_A4_T3.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_T3
description: >
    The sum of two infinities of the same sign is the infinity of that
    sign
---*/

//CHECK#1
if (Number.POSITIVE_INFINITY + Number.POSITIVE_INFINITY !== Number.POSITIVE_INFINITY ) {
  throw new Test262Error('#1: Infinity + Infinity === Infinity. Actual: ' + (Infinity + Infinity));
}

//CHECK#2
if (Number.NEGATIVE_INFINITY + Number.NEGATIVE_INFINITY !== Number.NEGATIVE_INFINITY ) {
  throw new Test262Error('#2: -Infinity + -Infinity === -Infinity. Actual: ' + (-Infinity + -Infinity));
}