test262/test/built-ins/Number/NaN/S15.7.3.4_A2.js
André Bargull 56036e4064 Enable strict mode for more built-in tests
- Remove no longer needed noStrict flags.
- Change tests to use propertyHelper.js for strict mode compatibility.
- Add tests for return value of `delete` operator, e.g. `delete Array.prototype === false`.
- Add non-writable tests for global NaN property.
- Split some tests to run in strict mode.
- Change tests with global `var length` declaration to use a different variable name for browser environments.
- Merge duplicated tests symbol-data-property-configurable-non-strict and symbol-data-property-configurable-strict.
- Merge duplicated tests symbol-data-property-writable-non-strict and symbol-data-property-writable-strict.
- (And a small change in propertyHelper to reduce code duplication in function call.)
2015-05-18 18:01:00 +02:00

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JavaScript

// Copyright 2009 the Sputnik authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
info: Number.NaN is ReadOnly
es5id: 15.7.3.4_A2
description: Checking if varying Number.NaN fails
includes: [propertyHelper.js]
---*/
// CHECK#1
verifyNotWritable(Number, "NaN", null, 1);
if (isNaN(Number.NaN) !== true) {
$ERROR('#1: Number.NaN = 1; Number.NaN === Not-a-Number');
}