src/third_party/mozjs-45/js/src/tests/test262/ch11/11.4/11.4.7/S11.4.7_A4.2.js

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

/**
 * Negating +0 produces -0, negating -0 produces +0
 *
 * @path ch11/11.4/11.4.7/S11.4.7_A4.2.js
 * @description Checking Infinity
 */

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

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