| // Copyright (c) 2016, 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 The is-expression e is! T is equivalent to !(e is T). |
| * @description Checks that the is-expressions 'e is! T' and '!(e is T)' are |
| * equivalent. |
| * @author ngl@unipro.ru |
| */ |
| import '../../../Utils/expect.dart'; |
| |
| main() { |
| Expect.equals((1 is! num), !(1 is num)); |
| Expect.equals((1.0 is! num), !(1.0 is num)); |
| Expect.equals(("string" is! num), !("string" is num)); |
| Expect.equals((new Object() is! num), !(new Object() is num)); |
| |
| Expect.equals((1 is! String), !(1 is String)); |
| Expect.equals((1.0 is! String), !(1.0 is String)); |
| Expect.equals(("string" is! String), !("string" is String)); |
| Expect.equals((new Object() is! String), !(new Object() is String)); |
| } |