JSTests/test262/test/language/expressions/compound-assignment/S11.13.2_A4.1_T2.6.js

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

/*---
info: The production x *= y is the same as the production x = x * y
es5id: 11.13.2_A4.1_T2.6
description: >
    Type(x) is different from Type(y) and both types vary between
    primitive String (primitive or object) and Undefined
---*/

var x;

//CHECK#1
x = "1";
x *= undefined;
if (isNaN(x) !== true) {
  throw new Test262Error('#1: x = "1"; x *= undefined; x === Not-a-Number. Actual: ' + (x));
}

//CHECK#2
x = undefined;
x *= "1";
if (isNaN(x) !== true) {
  throw new Test262Error('#2: x = undefined; x *= "1"; x === Not-a-Number. Actual: ' + (x));
}

//CHECK#3
x = new String("1");
x *= undefined;
if (isNaN(x) !== true) {
  throw new Test262Error('#3: x = new String("1"); x *= undefined; x === Not-a-Number. Actual: ' + (x));
}

//CHECK#4
x = undefined;
x *= new String("1");
if (isNaN(x) !== true) {
  throw new Test262Error('#4: x = undefined; x *= new String("1"); x === Not-a-Number. Actual: ' + (x));
}