| // 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 abstract V putIfAbsent(K key, V ifAbsent()) |
| /// If [key] is not associated to a value, calls [ifAbsent] and |
| /// updates the map by mapping [key] to the value returned by [ifAbsent]. |
| /// Returns the value in the map. |
| /// @description Checks that isAbsent is indeed called before putting the new key |
| /// in the map if it's not already associated to a value, resulting in a |
| /// NoSuchMethodError if the argument is null or can't be called like a function |
| /// (according to general language rules). |
| /// @author msyabro |
| |
| library putIfAbsent_A01_t08; |
| |
| import "../../../Utils/expect.dart"; |
| |
| test(Map create([Map content])) { |
| dynamic map = create(); |
| |
| Expect.throws(() {map.putIfAbsent("1", 1);}); |
| |
| Expect.throws(() {map.putIfAbsent("1", null);}); |
| Expect.isFalse(map.containsKey("1")); |
| } |