src/third_party/mozjs-45/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.3.js

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

/**
 * Operator x - y returns ToNumber(x) - ToNumber(y)
 *
 * @path ch11/11.6/11.6.2/S11.6.2_A3_T2.3.js
 * @description Type(x) is different from Type(y) and both types vary between Number (primitive or object) and Null
 */

//CHECK#1
if (1 - null !== 1) {
  $ERROR('#1: 1 - null === 1. Actual: ' + (1 - null));
}

//CHECK#2
if (null - 1 !== -1) {
  $ERROR('#2: null - 1 === -1. Actual: ' + (null - 1));
}

//CHECK#3
if (new Number(1) - null !== 1) {
  $ERROR('#3: new Number(1) - null === 1. Actual: ' + (new Number(1) - null));
}

//CHECK#4
if (null - new Number(1) !== -1) {
  $ERROR('#4: null - new Number(1) === -1. Actual: ' + (null - new Number(1)));
}