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Merge pull request #508 from thefourtheye/fix-for-498
handle NaN properly in assertions
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Original file line number | Diff line number | Diff line change |
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/*! | ||
* Chai - isNaN utility | ||
* Copyright(c) 2012-2015 Sakthipriyan Vairamani <thechargingvolcano@gmail.com> | ||
* MIT Licensed | ||
*/ | ||
|
||
/** | ||
* ### isNaN(value) | ||
* | ||
* Checks if the given value is NaN or not. | ||
* | ||
* utils.isNaN(NaN); // true | ||
* | ||
* @param {Value} The value which has to be checked if it is NaN | ||
* @name isNaN | ||
* @api private | ||
*/ | ||
|
||
function isNaN(value) { | ||
// Refer http://www.ecma-international.org/ecma-262/6.0/#sec-isnan-number | ||
// section's NOTE. | ||
return value !== value; | ||
} | ||
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// If ECMAScript 6's Number.isNaN is present, prefer that. | ||
module.exports = Number.isNaN || isNaN; |
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