// 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.

// @dart = 2.9

/// @assertion double sqrt(num x)
/// Returns -0.0 if x is -0.0, and NaN if x is otherwise negative or NaN.
/// @description Checks that [sqrt] return NaN if [x] is negative.
/// @author msyabro
/// @reviewer pagolubev


import "dart:math" as Math;
import "../../Utils/expect.dart";

main() {
  Expect.isTrue(Math.sqrt(-1).isNaN);
  Expect.isTrue(Math.sqrt(-10).isNaN);
  Expect.isTrue(Math.sqrt(-1e-52).isNaN);
  Expect.isTrue(Math.sqrt(-4.9406564584124654e-324).isNaN);
  Expect.isTrue(Math.sqrt(double.negativeInfinity).isNaN);
}