JSTests/test262/test/built-ins/NaN/S15.1.1.1_A4.js

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

/*---
info: The NaN is DontEnum
es5id: 15.1.1.1_A3.2
description: Use for-in statement
---*/

// CHECK#1
for (var prop in this) {
  if (prop === "NaN") {
    $ERROR('#1: The NaN is DontEnum');
  }
}