src/third_party/mozjs-45/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.7.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_T2.7.js
 * @description Type(x) is different from Type(y) and both types vary between String (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 String("1") - null !== 1) {
  $ERROR('#3: new String("1") - null === 1. Actual: ' + (new String("1") - null));
}

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