| /* |
| * 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 atan2(num a, num b) |
| * If [b] is positive, this is the same as atan(b/a). |
| * @description Checks that if [b] is positive, the result equals |
| * atan([a]/[b]). |
| * @author msyabro |
| */ |
| |
| import "dart:math" as Math; |
| import "../../Utils/expect.dart"; |
| |
| check(num a, num b) { |
| Expect.equals(Math.atan(a / b), Math.atan2(a, b)); |
| } |
| |
| main() { |
| check(1, 1); |
| check(-0.2, 1); |
| check(2.0, .0); |
| check(.0, 1e20); |
| check(double.negativeInfinity, 0); |
| check(double.infinity, 0); |
| } |