| /* |
| * 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 E single |
| * Returns the single element in this. |
| * If this is empty or has more than one element throws a StateError. |
| * @description Checks that the single element is returned. |
| * Checks that StateError is thrown if this list is empty or has more than one |
| * element |
| * @author kaigorodov |
| */ |
| library single_A01_t01; |
| |
| import "../../../Utils/expect.dart"; |
| |
| test(Iterable create([Iterable content])) { |
| void check(List content) { |
| Iterable a = create(content); |
| if (a.length == 1) { |
| Expect.equals(a.elementAt(0), a.single); |
| } else { |
| Expect.throws(() {a.single;}, (e) => e is StateError); |
| } |
| } |
| check([]); |
| List a = new List(); |
| check(a); |
| a.add(0); |
| check(a); |
| a.length = 25476; |
| check(a); |
| a.clear(); |
| a.length = 1; |
| check(a); |
| a = const[]; |
| check(a); |
| a = const[1]; |
| check(a); |
| } |