JSTests/test262/test/language/expressions/subtraction/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.

/*---
info: Operator x - y returns ToNumber(x) - ToNumber(y)
es5id: 11.6.2_A3_T2.7
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")));
}