test262/test/suite/ch15/15.8/15.8.2/15.8.2.18/S15.8.2.18_A1.js

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// Copyright 2009 the Sputnik authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/**
* If x is NaN, Math.tan(x) is NaN
*
* @path 15_Native/15.8_The_Math_Object/15.8.2_Function_Properties_of_the_Math_Object/15.8.2.18_tan/S15.8.2.18_A1.js
* @description Checking if Math.tan(NaN) is NaN
*/
// CHECK#1
var x = NaN;
if (!isNaN(Math.tan(x)))
{
$ERROR("#1: 'var x=NaN; isNaN(Math.tan(x)) === false'");
}