| // Copyright (c) 2013, 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 E singleWhere(bool test(E element)) |
| /// ... |
| /// Checks all elements to see if test(element) returns true. If exactly one |
| /// element satisfies test, that element is returned. Otherwise, if there are no |
| /// matching elements, or if there is more than one matching element, a |
| /// [StateError] is thrown. |
| /// @description Checks that a [StateError] is thrown if more than one element |
| /// match [test]. |
| /// @author msyabro |
| |
| |
| import "dart:typed_data"; |
| import "../../../Utils/expect.dart"; |
| |
| main() { |
| var l = new Uint8List.fromList([1, 2, 3, 4, 5]); |
| Expect.throws(() { l.singleWhere((e) => true); }, (e) => e is StateError); |
| |
| l = new Uint8List.fromList([1, 2, 3, 4, 5]); |
| Expect.throws(() { l.singleWhere((e) => e != 0); }, (e) => e is StateError); |
| } |