test262/test/built-ins/isNaN/return-true-nan.js

// Copyright (C) 2016 The V8 Project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
es6id: 18.2.3
esid: sec-isnan-number
description: >
  Return true if number is NaN
info: |
  isNaN (number)

  1. Let num be ? ToNumber(number).
  2. If num is NaN, return true.
includes: [nans.js]
---*/

NaNs.forEach(function(v, i) {
  assert.sameValue(isNaN(v), true, "value on position: " + i);
});