| // 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. |
| // Second dart test program. |
| |
| import "package:expect/expect.dart"; |
| |
| class NullTest { |
| static int foo(var obj) { |
| Expect.equals(null, obj); |
| } |
| |
| static bool compareToNull(var value) { |
| return null == value; |
| } |
| |
| static bool compareWithNull(var value) { |
| return value == null; |
| } |
| |
| static int testMain() { |
| var val = 1; |
| var obj = null; |
| |
| Expect.equals(null, obj); |
| Expect.equals(null, null); |
| |
| foo(obj); |
| foo(null); |
| |
| if (obj != null) { |
| foo(null); |
| } else { |
| foo(obj); |
| } |
| |
| Expect.isFalse(compareToNull(val)); |
| Expect.isTrue(compareToNull(obj)); |
| Expect.isFalse(compareWithNull(val)); |
| Expect.isTrue(compareWithNull(obj)); |
| Expect.isTrue(obj is Object); |
| Expect.isFalse(obj is String); |
| Expect.isTrue(obj is !String); |
| Expect.isFalse(obj is !Object); |
| Expect.isFalse(val is !Object); |
| |
| return 0; |
| } |
| } |
| |
| |
| main() { |
| NullTest.testMain(); |
| } |