LibTest/math/tan_A02_t01.dart

// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/**
 * @assertion double tan(num radians)
 * If [radians] is not a finite number, the result is NaN.
 * @description Checks that [tan] returns NaN if [radians] is not a finite
 * number.
 * @author msyabro
 */
import "dart:math" as Math;
import "../../Utils/expect.dart";

main() {
  Expect.isTrue(Math.tan(double.nan).isNaN);
  Expect.isTrue(Math.tan(double.infinity).isNaN);
  Expect.isTrue(Math.tan(double.negativeInfinity).isNaN);
}